ML20212D147

Rev 1 to Maint Procedure MP 1411.05, Maint & Repair of Limitorque Valve Operators Types SMB-0 Through SMB-4

ML20212D147
Person / Time
Site:	Davis Besse
Issue date:	10/03/1986
From:	Daft C, Elfstrom R, Long J TOLEDO EDISON CO.
To:
Shared Package
ML20212C847	List: ML20212C843 ML20212C918 ML20212C948 ML20212D109 ML20212D147 ML20212D162 ML20212D313
References
MP-1411.05, NUDOCS 8703040071
Download: ML20212D147 (70)

Text

e MP 1411.05 Davis-Besse Nuclear Ptter Statim O thit No.1 Maintenance Procedure MP 1411.05 Maintenance and Repair of Limitorque Valve Operators Types SMB-0 Through SE-4 ElfAR SAffTVRfL"fD Bamrd of Approval and Changes Prepared By . Tim rum /nnhoe El farmn

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i MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4 LIST OF EFFECTIVE PAGES (v) i l l I j Page No.1 Rev. No. l Change No.*l I I I i I l i l Page No.1 Rev. No. IChange No.*l I I I I I I I I I I I l i  !

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• For restricted changes and temporarily approved changes ,

event /date as well as the change number -- e.g., C-2(R) until restart ornote the cancellin C/TA thru 4/14/86.

O O

ii MP 1411.05.01

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MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERAT TYPES SMB-0 THROUGH SMB-4 p_

r i LIST OF EFFECTIVE PAGES V

i l l l i Page No.1 Rev. No. I Change No.*l l l l 1 l l l i Page No.1 Rev. No. IChange No.*l l l I l l l_ l l l l-l 33 1 1 i l l l i 1 51 I 1 1 1 l i

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• For restricted changes and temporarily approved changes, note the cancelling event /date as well as the change number -- e.g., C-2(R) until restart or C/TA thru 4/14/86.

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iii MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERAT TYPES SMB-0 THROUGH SNB-4 TABLE OF CONTENTS SECTION PAGE 1.0 PURPOSE .. . .

.................. 1

2.0 REFERENCES

.................. 2 3.0 DEFINITIONS . .

.................. 3 4.0 TOOLS AND EQUIPMENT

................ 3 5.0 PRECAUTIONS AND LIMITATIONS . ..

......... 5 6.0 PREREQUISITES .

.................. 7 7.0 ACCEPTANCE CRITERIA ... .

............ 7 8.0 PROCEDURE . . .

.................. 8 8.1 Disconnect Electrical Power Leads . ...... 8 8.2 Limitorque Valve Operator Removal From NBC Gear Box and NBC Gear Box Removal . . . . . . . 9 8.3 Limitorque Valve Operator Removal From Valve Flange With Sten Nut Installed ..... ...

'10 8.4 Limitorque Valve Operator Removal From Valve Flange With Sten Nut Removed i

......... 11 8.5 Limitorque Valve Operator Removal From Valve

{

1 Flange When Operator Cannot be Placed in Manual t

.................. 12 8.6 Limitorque Valve Operator Disassembly . . . . . 13

! 8.7 Cleaning, Inspection and Repair . . . . . . . . 17 i

8.8 Limitorque Valve Operator Reassembly ..... 18 8.9 Limitorque Valve Operator Subassemblies

(

(Disassembly and Reassembly) .... .....

26

i. 8.10 Limitorque Valve Operator Installation on NBC s

Gear Box (or Non-Rising Stes Valve) . . . . . . 30 e

, 8.11 Limitorque Valve Operator Installation on l

4 Valve with Stes Nut Installed . . . . . . . . . 31 l

i i

i

r iv MP 1411.05.01

. Draft A MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATOR TYPES SMB-0 THROUGH SMB-4 A TABLE OF CONTENTS (Continued)

SECTION PAGE 8.12 Limitorque Valve Operator Installation on Valve With Stem Nut Removed . . . . . . ....... 31 8.13 Lubrication . . . . . . . . . . . . . . . ... 32 8.14 Switch Removal / Installation . . . . . . .... 36 8.15 Limit Switch Adjustment .

.. ..... . ... 39 8.16 Torque Switch Setting . . . ... ... ....

46 8.17 Setting Position Limit Stops HBC-4 Through MBC-10 Units.

................. 47 8.18 Energization and Checkout of Limitorque Operators Following Maintenance, Repair or New Installation ...............

47 8.19 Inspection and Testing ... .. . .. . .. .

48 9.0 DOCUMENTATION .

.................. 49 ENCLOSURE 1 - Data and Signoff Sheet .

' . . .. . .. ... . 50 ENCLOSURE 2 - Figures .

.................. 53 ENCLOSURE 3 - Stem Measurement . ..............

65 l

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1 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERA TYPES SMB-0 THROUGH SMB-4 1.0 PURPOSE 1.1 This procedure provides instructions for maintenance to be performed on Limitorque operators models SMB-0 through SMB-4.

1.2 Due to the complexity and various configurations of these operators, this procedure has been divided into phases. This will for aallow the flexibility specific operator.to choose the maintenance required 1.3 Procedural phases:

8.1 Disconnect Electrical Power Leads 8.2 Limitorque Valve Operator Removal From KBC Gear Box and HBC Gear Box Removal 8.3 Limitorque Valve Operator Removal From Valve Flange With Stem Nut Installed 8.4 Limitorque Valve Operator Removal From Valve Flange With Stem Nut Removed 8.5 Limitorque Valve Operator Removal From Valve Flange When Operator Cannot be Placed in Manual 8.6 Limitorque Valve Operator Disassembly 8.7 Cleaning, Inspection and Repair 8.8 Limitorque Valve Operator Reassembly 8.9 Limitorque Valve Operator Subassemblies (Disassembly and Reassembly) 8.9.1 Spring Pack Disassembly / Assembly

, 8.9.2 Drive Sleeve Disassembly / Inspection / Assembly 8.9.3, 8.9.4 and 8.9.5 HBC Gear Boxes 8.10 Limitorque Valve Operator Installation on KBC Gear Box 8.11 Limitorque Valve Operator Installation on Valve With Stem Nut Installed 8.12 Limitorque Valve Operator Installation on Valve With Stem

Nut Removed 8.13 Lubrication

! 8.14 Switch Removal / Installation 8.15 Limit Switch Adjustment i

8.16 Torque Switch Setting 8.17 Setting Position Limit Stops HBC-4 Through KBC-10 Units

8.18 Energization and Check Out of Limitorque Operators Follow-ins Maintenance, Repair or New Installation

! 8.19 Inspection and Testing.

I l

4

() Procedure Text Page 1 of 48 e

2 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4 1.4

' I)

Not all portions of this procedure will be applicable for every

\s / maintenance condition. Enter the symbol "NA" in the applicable blanks on the Data and Signoff Sheet, Enclosure 1, as required.

This is also are being appropriate when only portions of this procedure conducted.

2.0 REFERENCES

2.1 Davis-Besse Procedures 2.1.1 MP 1410.32, Testing of Motor Operated Valves Using MOVATS 2.1.2 MP 1410.33, Meggering and/or Continuity Test of Electrical Equipment 2.1.3 ST 5061.02, Containment Vessel Local Leak Rate Test 2.1.4 ST 5064.01, Containment Isolation Valves Post Mainte-nance Test 2.1.5 Lubrication Manual 2.2 Manufacturer's Drawinas and Manuals 2.2.1 Limitorque, Bulletin SMBI-82C, Type SMB Instruction O 2.2.2 and Maintenance Manual Limitorque, Bulletin 871, Type SMB Valve Controls 2.2.3 Limitorque, Bulletin 15-73, Manual Type HBC 2.2.4 Limitorque, Bulletin HBCI-85, Type NBC Instruction and Maintenance Manual 2.2.5 Limitorque Corporation, 01-408-0013-4, Parts List Drawing Model SMB-0 through SMB-4 2.2.6 Limitorque Corporation, 01-408-0073-4, Parts List Drawing Model SMB-0 through SMB-4 2.2.7 Limitorque Corporation, 01-408-0074-4, Parts List Drawing Model SMB-0 through SMB-4 O Procedure Text Page 2 of 48

3 n.

MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4

,_ 3.0 DEFINITIONS

/si

\s / Not Applicable 4.0 TOOLS AND EQUIPMENT 4.1 Measurina and Test Equipment 4.1.1 Micrometer 4.2 Tools and Equipment 4.2.1 Rigging Equipment, as required 4.2.2 Drill, 1/4" or 3/8" drive 4.2.3 Drill Bit Set 4.2.4 Retaining Ring (Snap Ring) Pliers (Inside and Outside) 4.2.5 Honing Stone 4.2.6 Calipers (if spring pack is disassembled) 4.2.7 Bolt, 3/8", 2 1/2 to 3" long with U-nut (if spring pack is disassembled)

( 4.2.8 Cleaning Brush 4.3 Special Tools and Equipment 4.3.1 Tool, Lock Nut Removal 4.4 Parts 4.4.1 Gasket Material, Anchorite 425, or equivalent 4.4.2 Gasket, Housing 4.4.3 Gasket, Drive Motor to Housing 4.4.4 Gasket, Drive Sleeve 4.4.5 Gasket, Cartridge Cap O Procedure Text Page 3 of 48

4 MP 1411.05.01

, MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATOR TYPES SMB-0 THROUGH SMB-4 4.4.6 Gasket, Clutch Housing

( ) 4.4.7

%d Gasket, Limit Switch Compartment Cover 4.4.8 Gasket, Thru Cap (HBC-4 through HBC-10 only) 4.4.9 0-Ring, Declutch Shaft 4.4.10 0-Ring, Handwheel Shaft (SMB-0 through SMB-2 only) 4.4.11 0-Ring, Torque Switch 4.4.12 0-Ring, Limit Switch 4.4.13 0-Ring, Housing Cover (HBC-4 through NBC-10) 4.4.14 0-Ring, Thru Cap (HBC-4 through HBC-10) 4.4.15 Key, Motor Pinion (Type 4140 steel) (SMB-4 only) 4.4.16 Nut, Elastic Stop, Handwheel 4.4.17 Nut, Elastic Stop (if spring pack is disassembled) 4.5 Consumable Materials 4.5.1 Thread Protector, Valve Stem

, 4.5.2 Lint-Free Cloths or Paper Towels 4.5.3 Lockwire, Motor Pinion -

i

. 4.5.4 Solvent, Part Kleen 4.5.5 Penetrating Oil 4.5.6 Crocus Cloth, Fine Grit or i

4.5.7 Emery Paper 4.5.8 Grease, Exxon Nebula EP-1 4.5.9 Grease, Humble Beacon 325 or 4.5.10 Grease, Mobil 28 l 4.5.11 Lubricant, Molykote "G" or j 4.5.i Lubricant, Fel Pro N-5000 O Procedure Text Page 4 of 48 l i l

. _ -_- - ._. _ ._._i-_ _ _ . - - - . - - _ . _ _ _ _ _ . _ _ _ _

5 MP 1411.05.01

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MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATO TYPES SMB-0 THROUGH SMB-4 5.0 PRECAUTIONS AND LIMITATIONS 5.1 Administrative 5.1.1 Safety Tagging Procedure, AD 1803.00, will be in effect and followed throughout this procedure.

5.1.2 Cleanliness Control Procedure AD 1844.05 will be in effect and followed throughout this procedure.

5.1.3 Jumper and Lifted Wire Control Procedure AD 1823.00 will be in effect and followed throughout this procedure.

5.1.4 Observe proper radiation practices to limit personnel exposure, ALARA.

5.1.5 AD 1844.06, Control of Lifting and Handling Equipment, will be used when moving operators.

5.1.6 Only individuals who have been trained on maintenance and repair of Limitorque operators are qualified to perform this procedure.

5.2 Equipment 5.2.1 When working on environmentally qualified actuators inside containment, the following requirements apply:

• Torque switch must be brown or white

• Limit switch must have brown or white finger board t

with a brass gear case

• Terminal Phenolic blocks must be Buchanon or Marathon Black r

l

• Internal wiring must be Rockb.m os Firewall III or I Raychem Flastrol SIS

• T-drains must be installed in motors

• Grease relief must be installed in gear box.

5.2.2 When working on environmentally qualified actuators outside containment, the following requirements apply:

• Torque switch must be brown, white or red

• Limit switch must have brown, white or red finger board with aluminum or brass gear case l Procedure Text Page 5 of 48

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6 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4 5.2.2 (Continued)

N_,/-

• Terminal Phenolic blocks must be Buchanon or Marathon black

• Internal wiring must be Rockbestos Firewall III, Raychen Flantrol or Vulkene SIS.

5.2.3 Any new internal wiring on environmentally qualified actuators will be performed using 14 AWG Rockbestos Firewall III.

5.2.4 All leads will be bundled before closing limit switch cover to prevent crushed or broken leads.

5.2.5 The following actions can damage the operator:

• Lifting the operator by the handwheel

• Forcing the operator by the handwheel

• Forcing the declutch lever

• Using a cheater (mechanical leverage) on handwheel

• Lifting the operator by or laying the operators weight on the declutch lever 5.2.6 The Limitorque operator has more than one source of power.

5.2.7 Do not stop valve stem travel by depressing declutch lever during motor operation.

5.2.8 Do not jog motor in an effort to obtain a tighter seated valve.

5.2.9 Do not reset torque switch setting higher than the maximum that is recommended by the valve manufacturer, without engineering approval.

5.2.10 When replacing 0-Rings, Viton 0-Rings will be used.

These are identified with a paint dot.

5.2.11 Do not attempt to set limit switches without first disconnecting control and power circuits unless insulated tools and extreme caution is used.

5.2.12 Protect inside of limit switch compartment from exposure to water or steam.

() Procedure Text Page 6 of 48

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7 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERA TYPES SMB-0 THROUGH SMB-4 5.2.13

/)

s/

If a valve must be " motor operated" without first setting the limit switch, a " dead man" switch and extreme caution must be used.

5.2.14 The limit switch will not de-energize the motor in the valve " Closed" direction on torqued closed valves.

De-energize motor if torque switch failure occurs.

5.2.15 Do not bypass or render inoperative any of the person-nel safety or equipment protection devices.

5.2.16 Incompatible greases may cause greases to solidify, liquify or produce toxic gases. Only the greases specified in this procedure are to be used.

5.2.17 When replacing the covers on the geared limit switch, ensure frame.

the contact block is seated correctly on the 5.2.18 Ensure gaskets are intact, all cover bolts installed, all pipe plugs installed and conduit fittings reassembled.

5.2.19 Ensure hangers and supports are restored to their design status upon operator replacement.

6.0 PREREQUISITES O 6.1 Administrative 6.1.1 An REP has been issued if required.

6.1.2 Tags for the lif ted wires, mechanical modifications and jumpers have been issued and are ready to be attached.

(S0) 6.1.3 An NWO has been issued for repairs.

6.2 Equipment 6.2.1 The equipment or device has been isolated and/or de-energized prior to working on Limitorque unit.

6.2.2 Safety Red Tags have been issued and hung.

6.2.3 Record general information on the Data and Signoff Sheet prior to starting work.

6.2.4 Matchmark operator to valve to ensure proper reinstallation.

7.0 ACCEPTANCE CRITERIA Not Applicable

) Procedure Text Page 7 of 48

8 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATOR TYPES SMB-0 THROUGH SMB-4 8.0 PROCEDURE O 8.1 Disconnect Electrical Power Leads 8.1.1 Verify that all power to Limitorque unit is shut off, and Safety Red Tags are hung.

NOTE 8.1.2 Lifted leads shall be controlled in accordance with AD 1823.00.

8.1.2 Disconnect computer points and hang tags, if applicable.

8.1.3 Remove the limit switch compartment cover.

8.1.4 Disconnect the leads to the terminal block.

8.1.5 Disconnect compartment. the motor leads inside of the limit switch 8.1.6 Pull electrical cable from limit switch compartment.

Make sure leads are properly marked for reconnecting to the terminals.

NOTE 8.1.7 These steps are required to provide a reference point to allow setting limit switches per MP 1410.32. -

(S0) 8.1.7 Coordinate with operations, and by engaging the manual handwheel, position the valve to either the full "Open" or full " Closed" position. Record information on the Data and Signoff Sheet.

8.1.8 Turn the set rod (s) clockwise until it stops DO NOT force (refer to Enclosure 2, Figures, Figure 11).

8.1.9 Reinstall the limit switch compartment cover.

l I

O Procedure Text Page 8 of 48 l

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9 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPE TYPES SMB-0 THROUGH SMB-4

> NOTE 8.2 Review and/or refer to the parts drawing for this unit whenever disassembly is to be made.

Be certain to keep all parts clean and free from dirt when disassembly is made.

NOTE 8.2 If Limitorque box, valve perform Step operator is installed with an DC gear 8.2.

Begin at Step 8.3 or 8.4 if no B C gear box is installed, or if the operator is attached to a non-rising stem valve, or a rising stem valve where the valve yoke bushing causes the stem to rise instead of a threaded stem nut in the operator. In this case, remove any locking devices on the end of the stem.

devices (usually a nut and washer), lock the stem to theThese locking stem nut. Perform Steps 8.4.11 through 8.4.14 to remove the operator from its valve.

NOTE 8.2 Steps 8.2, 8.3 or 8.4 (actuator removal) need not be performed if valve operator is to be worked in place.

If the operator is to be worked in place, remove the sten nut, Steps 8.4.1 through 8.4.10, then proceed to Step 8.6 or proceed directly to Step 8.6 without removing the stem nut and use the lock nut removal tool to unscrew the drive sleeve from the stes per Step 8.5.3.

(S0) 8.2 Limitorque Valve Operator Removal From B C Gear Box and BC Gear Box Removal -

l l l CAUTION 8.2.1 l l i

l l s Do not use Limitorque valve operator handwheel l as a lifting point. i l l l l l l CAUTION 8.2.1 l l i

l l Prior to proceeding, ensure that the valve is l l

not hard seated, either open or shut. Coordi- (

l i

nate with operations and engage the manual l I

handwheel and operate the valve several turns I t

i I opposite of valve position.

l I

I l

l i

8.2.1

} Attach the lifting device to Limitorque valve operator and take up slack.

i l

Procedure Text Page 9 of 48 i

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10 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATO TYPES SMB-0 THROUGH SMB-4 n 8.2.2 Remove bolts holding actuator to gear box.

~ (,) 8.2.3 Carefully pull operator away from gear box and off of splined shaft of HBC gear box.

8.2.4 Removal of HBC Gear Box (if required) a.

Attach lifting device to HBC gear box.

b.

Remove bolts holding gear box to mounting flange.

c. Carefully pull HBC gear box off valve stem.

8.2.5 Transport valve operator / gear box to designated work area.

NOTE 8.3 Performance of Procedure Steps 8.3 and 8.4 requires the Limitorque operator to be placed in manual. If the operator cannot be placed in manual, proceed to Step 8.5.

NOTE 8.3 Procedure Step 8.3 removes the valve operator from the valve flange without removing the stem nut from the operator.

O Procedure Step 8.4 removes the stem nut from the operator prior to removing the operator from the valve flange.

Either Step 8.3 or 8.4 may be used.

(S0) 8.3 .

Limitorque Valve Operator Removal From Valve Flanae With Stem Nut Installed 8.3.1 i Remove valve flange bolts holding valve mounting flange to operator.

8.3.2 Attach suitable rigging or lifting device to valve operator and take up slack in rigging.

8.3.3 Depress declutch lever and place operator in manual.

8.3.4 Slowly rotate handwheel in closed direction maintain-ing tension with rigging equipment.

8.3.5 Continue rotating handwheel in closed direction while lifting until operator is clear of threaded valve stem.

8.3.6 Install thread protector on valve stem.

O Procedure Text Page 10 of 48

11 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4

,~

8.3.7

/h Transport valve operator to designated work area.

\m / (S0) 8.4 Limitorque Valve Operator Removal From Valve Flante With Stem Nut Removed 8.4.1 Unscrew the stem protector pipe or cap from the handwheel assembly.

NOTE 8.4.2 If the threads above the lock nut have been staked, follow Steps 8.4.2 through 8.4.4.

If they have not been staked, go to Step 8.4.5.

8.4.2 Stuff a rag or paper towel into the lock nut opening.

8.4.3 Drill out the staked threads above the lock nut.

8.4.4 Clean out the metal particles.

8.4.5 Use lock the nut.lock nut removal tool to loosen and remove the 8.4.6 Push the declutch lever down and turn the handwheel in the "Close" direction.

8.4.7 4

Observe that the stem nut is rising out of the housing

( as the handwheel is turned.

I 8.4.8 Stop rises.

turning the handwheel when the stem nut no longer ,

I 8.4.9 Use a scribe or pin to unscrew the remaining length of the stem nut.

(S0) 8.4.10 Remove the stem nut.

8.4.11 Remove flange bolts holding mounting flange to valve operator.

8.4.12 Attach suitable rigging or lifting device to valve operator and take up slack in rigging.

8.4.13 Carefully lift actuator free of valve and transport to designated work area.

8.4.14 Install thread protector on valve stem.

O Procedure Text Page 11 of 48

12 MP 1411.05.01 MAINTENANCEANDREPAIROFLIMITORQUEVALVEOP$RATORS TYPES SMB-0 THROUGH SMB-4

-("'y (S0) 8.5

( ,j Limitorque valve Operator Removal From Valve Flanne When Operator Cannot be Placed in Manual NOTE 8.5 Partial disassembly'cah allow return to manual operation. However, if manual operation is~ cot possible the following steps will provide one -

method for removal from the valve flange.

8.5.1 Remove the following components using the noted procedure steps:

• Torque switch - 8.6.1 Handwheel - 8.6.6 -

Declutch lever - 8.6.6 '

Motor - 8.6.2 Spring pack / worm assy. - 8.6.8.

(S0) 8.5.2 Remove bolts or caps screws from housing cover and remove housing cover.

O NOTE 8.5.2 ,

Retain housing gasket for reuse or obtain thickness measurement to obtain proper -

replacement gasket.

(S0) 8.5.3 Using the lock nut removal tool, unscrew the drive sleeve from the valve stem.

' I l ~'l l CAUTION 8.5.4 l l

l l Do not use handwheel as lift point. l I

I. I

! I i

8.5.4 Attach lifting device to actuator and remove slack.

8.5.5 Unbolt operator from valve mounting flange and put bolts in plastic bag.

8.5.6 Lift operator housing from valve stem.

8.5.7 Install thread protector on valve stem.

!O Procedure Text Page 12 of 48 i

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. l 13 MP 1411.05.01 1 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS '

TYPES SMB-0 THROUGH SMB-4 8.6 Limitorque Valve Operator Disassembly O

Q 8.6.1 Limit Switch and Torque Switch Removal a.

Unbolt if installed, and remove limit switch compartment cover,

b. Disconnect and remove geared limit switch assembly.

c.

Disconnect and remove torque switch assembly.

d.

Remove the terminal strip (s) and other electrical parts that may be installed in the compartment, including space heater.

e. Remove the local mechanical indicator, if installed.

8.6.2 Drive Motor Removal a.

Ensure that eleserical motor leads are disconnected.

b. Remove bolts and drive motor and pull motor leads from limit switch compartment.

c. Remove gasket.

(S0) d. Perform an insulation resistance test per MP 1410.33. Readings should be 1 Megohm minimum. '

8.6.3 Motor Pinion Removal (remove only if worn or damaged) l l I CAUTION 8.6.3.a l 1

l l SMB-0 operators have a different pinion l l

Arrangement than SMB-1 through SMB-4 operators. I l Ensure the pinion is not installed backwards. l l (Refer to Figure 2.)

l l

l 1

I

a. Cut and remove lock wire,

b. Loosen set screw.

i Procedure Text l

Page 13 of 48

14 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERAT TYPES SMB-0 THROUGH SMB-4 m 8.6.3 (Continued) us i

l I CAUTION 8.6.3.c l l l l l

If on SMB-4 valve operators the motor pinion l l

gear key shows signs of damage or deformation, l replace the key with a key made from type l 4140 steel. l I l I I I

c. Remove pinion and key.

8.6.4 Clutch Housing Removal a.

Remove retaining ring and split ring retainer.

b.

Remove split ring by pushing against the worm shaft clutch gear, compressing the fork return spring, allowing the split ring segments to fall from the worm shaft.

c. Remove worm shaft clutch gear.

f' '

9 Spacer may come out with the worm shaft clutch gear (SMB-0 and SMB-1 only).

d.

Some operators have a declutch shaft extension passing loosely through the clutch housing. This .

extension should be removed by pulling from the motor end prior to removing the clutch housing to ensure it does not fall out during removal of the housing and become lost.

e. Remove clutch housing capscrews.

Remove clutch housing by lifting while pulling the housing away from the main housing. This will allow the clutch fork

, (part of the clutch housing) to disengage

! from the wo.ti shaft clutch.

f.

From the worm shaft remove:

Spacer (for SMB-0 and SMB-1 only).

Worm shaft clutch.

Clutch fork return spring.

Procedure Text Page 14 of 48 n -

er . ew g-, . -- * ,~, -- n n -- r, +-- -- , - - . , - , , - + ---.-a-

15 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPE TYPES SMB-0 THROUGH SMB-4 8.6.5

(; Trippers to FigureRemoval, 3) Inspection and Reinstallation (Refer

a. Remove tripper spring.

b.

IF off-centered cams are installed in the trippers, matchmark the cans and trippers to allow proper reinstallation.

c. Remove capscrews and trippers. Ensure that off-centered the fingers duringcamsremoval. (if installed) do not fall from d.

After inspecting for defects, reinstall the tripper fingers.

IF off-centered cams are installed use the matchmarks to install as originally found.

Replace tripper fingers in same location as they were prior to removal.

NOTE 8.6.5d The inside land of one finger must be 1/8" higher than the other by using the

, [ 'N off-centered can, or if off-centered

\~ l cams are not installed, grinding / filing the land higher.

8.6.6 .

Hand Wheel Drive Assembly and Declutch Shaft Assembly Removal (Refer to Figures 4 and 5)

(S0) a. Remove any retaining rings that may exist in

! front of the declutch link. THEN slide declutch i link off splined declutch shaft.

(S0) b. Remove any retaining rings that may exist between the declutch link and the housing.

c.

Loosen and key,handwheel setscrew and remove handwheel d.

Loosen lever and declutch key. lever setscrew and remove declutch I \

Procedure Text Page 15 of 48

16 MF 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATO TYPES SMB-0 THROUGH SMB-4

_ T-8.6.6 (Continued)

(s_s /

NOTE 8.6.6e End cap is rotationally spring loaded.

A loud snap might be heard on removal of the end cap. Do not be alarmed, as this is the torsion spring being released.

e.

Remove bolts and the spring cartridge cap.

f.

Inspect the spring cartridge cap to ensure the spring pin for the torsion spring is not damaged.

This spring pin should be sticking out of the inside of the end cap in the declutch shaf t area.

g. On SMB-3 and SMB-4, inspect handwheel shaft needle bearings and oil seal.

h.

Remove declutch shaft from the lever end of unit.

i Remove 0-Ring from the declutch shaft.

j.

Remove torsion spring from housing. Inspect the torsion spring and housing cavity for defects.

i k.

I~') Remove the elastic stop nut from the handwheel shaft.

4 V

1. Remove spacer and handwheel gear.

m.

On SM3-3 and SMB-4 only, loosen four capscrews and remove retainer ring from motor end handwheel shaft bearing.

l n.

Remove handwheel shaft (may have to be tapped free from bearing).

o. On SMB-0 thru SMB-2 only, remove bearing from l

housing.

8.6.7 Handwheel Assembly and Disassembly (SMB-0 thru SMB-2 only) (Refer to Figure 4)

a. IF bearing must be removed, remove 0-Ring (if installed) and retaining ring from the handwheel 1

l shaft.

IF the 0-Ring is NOT on the shaft, look in the housing.

b. Remove retaining ring from around the 0.D. of bearing and remove bearing.

Procedure Text Page 16 of 48

. 1 17 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4 8.6.8 f}

v Worm Shaft and Wors/ Spring Pack Assembly Removal (Refer to Figures 6 and 7) l a.

Pull on the spring pack from the handwheel end and remove from the housing.

IF the spring pack does NOT move easily, rotate the worm shaft from the motor end.

This will unscrew the worn from the worm gear and force the spring pack out of the handwheel end of the housing.

IF further disassembly is required go to Section 8.9.1.

b.

Remove four cap screws and bearing cap.

c.

Remove worm shaft from the motor end of the case.

8.6.9 Drive Sleeve Assembly Removal a.

Remove bolts or capscrews and remove housing Cover.

b. Using eyebolts in the threaded holes in the end of the drive sleeve assembly, lift the drive

) sleeve assembly from housing.

c. If further disassembly is required refer to Section 8.9.2.

NOTE 8.6.9c The upper and lower quad rings are now available for inspection and replacement if required.

i i

O- Procedure Text Page 17 of 48

1 18 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4 8.7 Cleaning, Inspection and Repair

(-

l-l l CAUTION 8.7.1 1 l l l Use Part Kleen tool degreasing solvent. Other l l

l solvents may be used with Quality Engineering approval. l l I l

8.7.1 Clean all mechanical parts removed from the actuator.

8.7.2 Inspect all parts for damage or excessive wear.

8.7.3 Small nicks or burrs on drive shafts and gears can be smoothed out with a honing stone or a fine file.

8.7.4 Carefully inspect all bearing assemblies for any defects in inner or outer races or the rollers.

Replace any bearing assemblies showing excessive wear or binding.

8.7.5 Remove surface corrosion with penetrating oil and fine grit crocus cloth or emery paper.

8.7.6 y If all parts are determined to be satisfactory for reuse, proceed to Step 8.8.

8.7.7 If replacement of bearings or other parts is necessary -

or it is desired to further disassemble the actuator, Step 8.9 provides specific instructions for disassem-bly and reassembly of each actuator subassembly.

8.8 Limitorque Valve Operator Reassembly NOTE 8.8 Prior to reassembly, verify the applicable sections of the Data and Signoff Sheet have been completed.

I l NOTE 8.8 t

All bearings, worm, splined shafts and other load bearing parts should be greased prior to installation in the operator.

O b Procedure Text Page 18 of 48

r 19 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATOR TYPES SMB-0 THROUGH SMB-4 m (S0) 8.8.1 Drive Sleeve Assembly Installation

,,) a.

Clean and gasketcover.

housing surfaces of valve operator housing b.

Coat the entire drive sleeve assembly with grease.

NOTE 8.8.1c If the Limitorque operator was worked in place without the stem nut removed, the drive sleeve will have to be installed by engaging the stem nut threads with the stem and rotating the stem nut with the lock nut removal tool until the drive sleeve assembly lower bearing is properly seated in the lower bearing cups.

c.

Install the drive sleeve assembly into the case.

I l I CAUTION 8.8.1d l l l l l

The drive sleeve is shimmed to ensure proper l tooth alignment of the worm and worm gear. The l C_,N) l use of gaskets of different thickness may cause l l

binding or improper drive sleeve alignment. l l

I 1 I

d.

If the old gasket is still serviceable, place it on the mating surface of the case. IF it is not serviceable, replace it with a new gasket of the same thickness,

e. Install the housing cover.

f.

Tighten the four bolts in a criss-cross pattern until snug.

(S0) 8.8.2 Worm Shaft and Worm (Spring Pack Assembly) l Installation (Refer to Figures 6 and 7) a.

Install bearing on worm shaft (two bearings may be required on types SMB-3 and SMB-4).

b. Install retainer ring for bearing (s).

()

Procedure Text Page 19 of 48

20 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPER TYPES SMB-0 THROUGH SMB-4

~s 8.8.2 (Continued)

(s_/ c.

Install worm shaft bearing cap (handwheel clutch pinion assembly).

d.

Install worm shaft from motor end of housing.

Insert until bearing cap seats against the operator housing.

e.

Tighten the cap bolts in a criss-cross pattern.

f.

Install fork return spring.

NOTE 8.8.2a Thinner set of lugs face toward handwheel clutch pinion.

g.

Install worm shaft clutch.

NOTE 8.8.2h Spacer installed on SMB-0 and SMB-1 only.

h.

Install worm shaft clutch gear with spacer.

i.

Depress worm shaft clutch gear to compress fork O' return spring and install split ring and split ring retainer.

j.

Install retaining ring. .

k.

Install the worm (spring pack assembly) on the worm shaft.

NOTE 8.8.21 To engage the worm it may be easinr to rotate the worm shaft clutch to engage the splines on the worm shaft.

1.

l By rotating the worm shaft in the proper direc-tion engage the worm fully with the drive sleeve.

(S0) 8.8.3 Declutch And Handwheel Shaft Installation

a. Check the torsion spring cavity in the actuator body, and remove any foreign material.

b.

Install the torsion spring in the cavity.

i l

Procedure Text Page 20 of 48

21 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4

,,s 8.8.3b (Continued)

Rotate the spring until the tang on the motor end goes into a matching hole in the actuator body.

Insert fully into cavity.

I l I CAUTION 8.8.3c I I l i Be certain the declutch handle keyway on the i l declutch shaft is pointing upward and the l l

split pin is on the right (clockwise) side i l

of the torsion spring tang on the handwheel l end of the spring. l I l I I I

c.

Install end. the declutch shaft from the handwheel d.

Install retaining ring on motor end of declutch shaft (if required).

e.

( Install the possible. handwheel shaft from motor end if i

Install bearing retaining ring spacer and 0-Ring (SMB-0 thru SMB-2 only). ,

f.

For SMB-3 and SMB-4 only, install handwheel shaft from the motor end.

Install bearing retainer ring and tighten capscrews.

3 Be certain the 0-Ring for the declutch shaf t is in the opening for the declutch shaft in the cartridge cap. Replace if required.

h.

Check the cartridge cap for the condition of the split pin, if it is bent, broken or missing, replace it.

i.

For SMB-3 and SMB-4 only, install oil seal and needle bearings for handwheel shaft in the cartridge cap.

I

(

N i

Procedure Text

\ Page 21 of 48

- - - - - - - . - - - .m.,_-,_ .,.r_y, _ , . , _ , _ . . . _ . - _ , _ , , r.- - - ,_ _ , _ - - . _ - ,.-,--__-.,.c,- _ - - _ ,_ __ - .

e 22 MP 1411.05.01 MAINTENANCE AND 9EPAIR OF LIMITORQUE VALVE OPERATORS TYPES EMB-0 THROUGH SMB-4

.. 8.8.3 (Continued)

- j j.

Install the cartridge cap, use a new gasket if the old one is damaged.

k.

Start several of the screws which hold the cartridge cap in place.

1.

Install the declutch lever and key. Tighten setscrew in handwheel.

m.

Slide the cartridge cover to within \" of the housing.

n. Depress the declutch lever and slide the car-tridge cover flush with the actuator housing.

o. The declutch lever may be released but the cartridge cap cover must be held tight against the housing.

p.

Tighten the cartridge cap cover mounting screws.

NOTE 8.8.3q Link must be installed pointing as close to straight down as possible. The flat O side of the link should be toward the limit switch compartment.

q.

Install the declutch link on the declutch shaft. -

r.

Install retaining ring on declutch shaft to hold declutch link in place (if required).

s. Loosen the cartridge cap cover plate and check for a gap between the locknut in the cartridge cap and the thrust washer on the springpack (if necessary remove the declutch lever).

l i

('~'

Procedure Text Page 22 of 48

. _ _ . , _ _ . - - - . . . , _ . - ~ . . . , _ - , _ , , _ _ , , - _ _ . - - . . _ _

23 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERAT TYPES SMB-0 THROUGH SMB-4 8.8.3 (Continued) l l l CAUTION 8.3.3t l l l l l

Do not tighten the locknut, as it will put addi- l tional preload on the springpack.

l l l l l

(S0) t. IF a gap exists, loosen the set screw in the locknut and turn the locknut until it just touches the spring pack thrust washer.

u.

Tighten the set screw to capture the locknut in place.

v.

Replace the cartridge cap cover and declutch lever, if removed.

(S0) 8.8.4 Clutch Housing Installation a.

For the clutch housing remove clutch trippers and spring from clutch housing, if installed.

b.

CJ Install declutch shaft extension, if required.

c.

Install gasket and clutch housing using 4 capscrews. Tighten screws. -

NOTE 8.8.4 Declutch fork must fit inside grooves on worm shaft clutch.

d.

Install clutch trippers in same configuration they were in before removal (be sure same side facing outward). ,

IF the fingers are the new style, using cams to achieve the proper height, be certain the matchmarks on the cams and fingers match.

e. Install the capscrews and tighten.

f.

Install the tripper spring.

' g.

Engage the operator in manual and check operation of declutch mechanism.

() Procedure Text Page 23 of 48

24 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPER TYPES SMB-0 THROUGH SMB-4 8.8.4 (Continued)

C' h.

Rotate the worm shaft clutch gear o' y hand to return operator to motor operated mode.

NOTE 8.8.5 Check to be sure the declutch mechanism works properly before installing drive motor.

(S0) 8.8.5 Drive Motor Installation I

l i CAUTION 8.8.5a

! i l l l

If on SMB-4 valve operators the motor pinion l l

gear key shows signs of damage or deformation, l l

replace the key with a key made from type 4140 steel. l I I l I '

CAUTION 8.8.5a l i l I I

Ensure motor pinion is not installed backwards. l I I I

p a.

! Insi;all key and pinion on motor shaf t ensuring it is a tight fit on the motor shaft.

l NOTE 8.8.5a '

Refer to Figure 1. Pinion arrangement is different for SMB-0 operators. On SMB-0, the motor pinion 'is installed with the set screw /lockwire between the gear teeth and the motor flange.

On SMB-1 through SMB-4, the gear teeth are between the set screw /lockwire and the motor flange.

b. Tighten setscrew and install lockwire.

NOTE 8.8.5c Add grease to clutch housing cavity prior to motor installation.

c. Install motor gasket.

i Q Procedure Text Page 24 of 48

25 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERAT TYPES SMB-0 THROUGH SMB-4 8.8.5 (Continued)

(m

(,) d.

Reinstall motor while aligning drive pinion with clutch gear and carefully pulling motor leads into limit switch compartment.

e. Install mounting bolts and tighten.

(S0) 8.8.6 Installation of Electrical Components in Limit Switch Compartment a.

Install terminal block (s).

b. Install space heater if removed.

c. Install the position indicator module if the operator is equipped with one.

NOTE 8.8.6d Do thisnot time. turn limit switch set rod (s) at

d. Replace 0-Ring, if necessary, and install the geared limit switch.

/'~ l l(

l l

I CAUTION 8.8.6 Ensure the torque switch is not installed upside l l

l I

i i down.

l I I I l

e. Install torque switch as follows:

Reset the pointers to a setting of I Open t

and 1 Closed.

Ensure that the valve is not torqued, and install the torque switch in such a way that no rotation of the base plate is required to align the mounting holes.

Reinstall the mounting screws and readjust the pointers to the desired settings.

l f.

Connect all electrical leads according to the operator wiring diagram.

/N s ,)

s Procedure Text Page 25 of 48

- - - -----------w-,

m-- w .- - -- - ---,. , - - - , - - - , - - . . , - , , , , , , - , , , - ,------.-,w

26 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4

,-s 8.8.6 (Continued) g.

Install the limit switch compartment cover using a new gasket, if required.

h.

Proceed with Step 8.10, 8.11 or 8.12, Limitorque Valve Operator Installation OR IF the valve operator was worked in place, proceed to Step 8.15, Limit Switch Adjustment.

8.9 Limitorque Valve Operator Subassemblies (Disassembly and Reassembly)

(S0) 8.9.1 Spring Pack Disassembly / Assembly (Refer to Figure 7)

NOTE 8.9.1 The spring pack assembly should not be disassembled unless absolutely necessary.

NOTE 8.9.la i

Proper tension of the spring discs is very i

important. The amount of tension is controlled by the nut at the end of the worm shaft. The tension is adjusted by the number of turns of 1 the nut.

NOTE 8.9.la Some operators have a locknut with set screw .

instead of an elastic stop nut.

a.

Matchmark the stem and elastic stop nut in a way that allows monitoring the marks during removal

with a wrench attached.

b. Place assembly in a soft-jawed vice holding on the bearing ot cer surface.

' (S0) c. Measure the distance from the torque limit sleeve to thrust washer behip i Belleville springs.

(S0) d.

( Remove elastic stop nut, counting the exact

number of turns to remove.

l

e. Remove thrust washer and the torque limit sleeve.

l L

I Procedure Text Page 26 of 48

27 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATOR TYPES SMB-0 THROUGH SMB-4 8.9.1 (Continued)

Oe l

l I CAUTION 8.9.lf l l

l l The Belleville spring discs must be removed l l

i and replaced in the exact same order and manner. I Use caution when removing the discs.

l on the work bench where they will not Place be dis-them l l turbed l i I I I I

f.

Remove Belleville spring discs and remaining thrust washer. Place on 3/8" bolt to keep in appropriate order.

(S0) g.

Count the Belleville washers and measure thick-ness of each. All should be identical.

h.

Remove worm shaft with bearing from bearing cartridge stem.

i .

Spot drill stakes, loosen setscrew and remove

() j.

bearing locknut. Remove bearing cartridge cap.

Inspect bushing.

Remove and replace if worn. -

k. Inspect worm.

Remove and replace if worn.

1. Reinstall cartridge cap, new bearing and locknut.

m. Tighten and stake threads of setscrew.

n. Pack bearing with Exxon Nebula EP-1 grease.

o.

! Install worm shaft with bearing into bearing cartridge stem.

p. In the same order removed, install:

Thrust washer i

l

• Torque limit sleeve Belleville spring discs Thrust washer.

Procedure Text Page 27 of 48

r ,

28 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATOR TYPES SMB-0 THROUGH SMB-4 8.9.1 (Continued)

{'Ns_,)

(S0) q.

Install new elastic stop nut with the same number of turns as Step 8.9.1d.

(S0) r. Measure the distance from the torque limit sleeve to thrust washer behind the Belleville springs.

This should equal the distance previously recorded (Step 8.9.!c).

(S0) 8.9.2 Drive Sleeve Disassembly / Inspection / Assembly (Refer to Figure 8)

I a.

Remove lower bearing cone and spacer,

b. Remove worm gear.

c. Remove upper bearing cone.

NOTE 8.9.2d If worm gear requires replacement, the worm should be carefully inspected to ensure the worm has not been damaged.

d.

Inspect all parts for chips, gouges, burrs, nicks, etc.

m IF any part shows excessive wear, it should be replaced.

e.

Clean the upper and lower drive sleeve bearings with solvent and dry them.

f.

Clean the upper and lower bearing journals on the drive shaft with solvent and dry them.

3 Inspect the bearing journals for gouges, nicks, burrs, etc.

IF such areas are present, dress with a honing stone or a fine file. Be sure to wipe the journals clean when finished.

(S0) h. Coat the bearing journals with a light film of Exxon Nebula EP-1 grease.

i

i. Reinstall worm gear.

j.

Reinstall spacer and lower bearing cone.

() Procedure Text Page 28 of 48 l

29 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATOR TYPES SMB-0 THROUGH SMB-4 8.9.2

(_) (Continued)

(m_/

k. Install upper bearing cone.

NOTE 6.9.2k Stem nut and locknut are to be in stalled if necessary, when the operator is mounted.

(S0) 8.9.3 HBC-4 Through HBC-10 Disassembly (Refer to Figure 12)

a. Remove stop screw cover.

b. Remove stop screw and lock screw, c.

Rotate worm shaft full clockwise until pointer cap stops longer rotating OR until the worm shaft can no be turned,

d. Remove end cap and thru cap.

e. Remove pointer cap and housing cover.

f.

Remove worm shaft, by pulling from housing.

l' s '

It will be necessary to slightly rotate or

\s- cock the drive sleeve away from the worm in order to allow the bearing to clear.

It is NOT necessary to remove bearing from worm shaft.

g.

Remove drive sleeve and worm gear from housing.

h. Clean all parts with solvent and dry them.

i.

Inspect all parts for wear damage and obtain necessary replacements.

(S0) 8.9.4 HBC-4 Through HBC-10 Reassembly (Refer to Figure 12) a.

Replace drive sleeve 0-Ring in housing and housing cover.

b.

Install worm gear and drive sleeve in housing.

(S0) c. Pack worm shaft bearing and coat worm with Exxon 1

Nebula EP-1 grease.

d. Install worm shaft in housing.

Procedure Text Page 29 of 48

30 MP 1411.05.01

~

MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERA TYPES SMB-0 THROUGH SMB-4 (3 8.9.4 (Continued)

\- l e.

Install end cap with gasket on housing.

f.

Install with 0-Ring in thru cap and install thru cap gasket, g.

Install stop screw, preset set for 90' of rota-tion by establishing 45' rotation on either side of the worm gear.

NOTE 8.9.4g It will be necessary to re-adjust the stop once the actuator is on the valve.

h.

Install stop screw lock screw and stop screw Cover.

8.9.5 Installation of HBC Gear Box (if required) a.

Using suitable lifting device, position KBC gear box next to valve stem.

b.

With HBC gear box in full close position, care-fully line-up HBC gear box with valve stem and slide gear box in place.

eOs c.

Install and tighten flange bolts holding valve mounting flange to HBC gear box. -

(S0) 8.10 Limitorque Valve Operator Installation on KBC Gear Box (or Non-Rising Sten Valve) 8.10.1 Using suitable lifting device, position operator in position next to HBC gear box (valve).

8.10.2 Carefully line up splines in operator with splines in gear box (valve) and slide actuator into place against gear box flange.

8.10.3 Install bolts holding actuator to housing and tighten.

8.10.4 Reinstall any stem nut locking devices, if previously installed (usually a nut and washer). -

8.10.5 With operator in manual, rotate handwheel in each direction to ensure no binding of actuator or stem.

8.10.6 Install protective cap or pipe.

O Procedure Text Page 30 of 4S

31 MP 1411.05.01 '

MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATO TYPES SMB-0 THROUGH SMB-4

( (S0) 8.11 Installed Limitorque Valve Operator Installation on Valve With Stem Nut NOTE 8.11 Ensure the valve stem nut and valve stem are cleaned, inspected and lubricated prior to operator installation.

8.11.1 Using suitable lifting device, position operator in position over valve stem.

8.11.2 With valve operator in manual, carefully engage stem nut with valve stem threads.

8.11.3 Using care rotate valve operator handwheel in the "Open" direction while lowering operator onto the mounting flange.

8.11.4 Install and tighten flange bolts holding valve mount-ing flange to valve operator.

I l I CAUTION 8.11.5 l l

l 1 While performing this step, ensure valve dise (7-~) is not jammed into the valve seat. I l

I I .

8.11.5 With operator in manual, rotate handwheel in each direction to ensure no binding of actuator stem.

8.11.6 Install protective cap or protection pipe.

l (S0) 8.12 Limitorque Valve Operator Installation on Valve With Stem Nut Removed NOTE 8.12 Ensure the valve stem nut and valve stem are cleaned, inspected and lubricated prior to operator installation.

NOTE 8.12 Be sure that operator to be installed is the original operator for the valve, or an acceptable replacement.

l Use Model No., Serial No., and Order No. if necessary,

! to trace operator specifications and verify acceptability.

(A) Procedure Text l Page 31 of 48

v 32 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATO TYPES SMB-0 THROUGH SMB-4

/~ (S0) 8.12.1 Lubricate valve stem and stem nut with Molykote "G" or Fel Pro N-5000.

8.12.2 Carefully lower valve Install attaching operator onto valve body flange.

bolts.

8.12.3 Insert stem nut into operator; then screw stem nut on valve stem as far as it will go.

Align stem nut and drive sleeve splines.

8.12.4 Push declutch lever down and turn handwheel in "Open" direction until it cannot be turned any further. (This action causes stem nut to fully retract into operator.)

8.12.5 Using special wrench or driftpin, screw locking nut into operator until snug.

(S0) 8.12.6 Using chisel or punch, stake threads at two places (180' apart) just above locking nut.

8.12.7 With operator in manual, rotate handwheel in each direction to ensure no binding of actuator or stem.

8.12.8 Install protective cap or pipe.

8.13 Lubrication NOTE 8.13 If operator has been disassembled, lubricant may be added at any convenient point during the reassembly process complete.rather than using pipe plugs after assembly is (S0) 8.13.1 The main gear box and the geared limit switch shall be lubricated in accordance with the Lubrication Manual.

8.13.2 Limitorque valve operator motors are factory lubri-cated for life.

8.13.3 The following should be noted when inspecting the gear box and geared limit switch lubrication:

a. Limit Switch:

Humble Oil Co. Beacon 325 grease is light gray in color.

O Procedure Text Page 32 of 48

33 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4 8.13.3 (Continued) d

• Mobil color, Oil Corp. - Mobil 28 is dark red in

b. Gear Box:

Exxon - Nebula EP-1 is dark tan in color.

NOTE 8.13.3a & b All of the above greases should be smooth and creamy, free of lumps and foreign matter.

c. H. Lo Attachments -- Gulf Harmony 32 8.13.4 Lubricant Requirements for the Gear Box:

The approximate lubricant quantities and weights for SMB and HBC-5 actuators are as follows:

Size Quantity (Gals.) Weight (lbs.)

SMB-0 1.0 SMB-1 9.5 r~ 1.5 15.0 SMB-2 1.75

(]s SMB-3 SMB-4 5.5 17.5 50.0

8.5 75.0 HBC-5 5.2 45.0 .

8.13.5 In the event that lubricant types are changed, the lubricants shall NOT be mixed.

I i

l I CAUTION 8.13.6 l l

l l Ensure pipe plugs used are on gear box and l l are NOT conduit plugs.

l l i l l l i 8.13.6 Unscrew two pipe plugs located on lower and upper side

{

of case.

8.13.7 Using grease gun, inject clean fresh grease into lower pipe plug opening until grease reaches level of upper pipe plug opening.

8.13.8 Remove pipe plug on motor gear box and fill it with grease.

() Procedure Text Page 33 of 48 i

34 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERA TYPES SMB-0 THROUGH SMB-4

/s 8.13.9 Inject approximately 1/2 ounce of grease into zerk

\s- fitting on handwheel housing.

8.13.10 Reinstall pipe plugs.

(S0) 8.13.11 Lubrication and inspection of limit switch and torque switch.

NOTE 8.13.11 Do not use abrasive cloth or paper to clean silver contacts of geared limit switch and torque switch.

Contacts should be burnished, or cleaned using a lint free cloth.

NOTE 8.13.11a Be careful not to apply a bending force to the rotor, it could cause cracking at the groove pin area.

a.

With the limit switch removed from the actuator, remove finger base the screws off theand rotor. lockwashers and lift the This is the proper time to inspect the rotor

(# } for cracks and the rotors and fingerplate N_/ contacts for condition.

b.

Remove the two geared limit switch gear box covers by removing the machine screws.

Place screws in a plastic bag.

I l i CAUTION 8.13.11e l l

l l Care is required to prevent intermediate gear l l

shaf ts from falling out daring the cleaning l l operation.

l l l l l

c.

Clean the gears inside the geared limit housing with a brush and proper solvent.

d. Clean the two covers.

O' Procedure Text Page 34 of 48

_ - . . , . . . , . - . -, -- , c,., , , r.,.,. . , _ . - - - , - - - , - . _ - - _ , _ , , _ _ , - .-

8 35 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERAT TYPES SMB-0 THROUGH SMB-4

,s

<\ 8.13.11 (Continued)

N e.

Install one of the two covers.

f.

Using Exxon Beacon 325 or Mobil 28 grease pack the gear cavity with the proper _ grease, DO NOT pack solid, BUT leave a small volume open for expansion. *

g. Replace the remaining cover.

NOTE 8.3.11h Be extremely careful not to apply a bending force on the rotors.

h. Replace the finger base on the rotors.

Replace the screws and lockwashers.

i.

The limit switch is ready for re-installation.

j.

Inspect the torque switch contacts and clean if necessary.

k. Inspect 0-Ring and replace if required.

() 1.

Carefully check general condition of switch and freedom of operation.

8.14 Switch Removal / Installation .

l l

• WARNING 8.14.1 *

• Ensure power is turned off to prevent the motor *

• drive from turning on during switch replacement.

• l

• This eliminates the potential injury to

• i

• servicing personnel or damage to the valve.

• 8.14.1 Limit Switch Removal.

a.

! Remove limit switch cover and electrical leads as necessary.

1

() Procedure Text Page 35 of 48

36 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATO TYPES SMB-0 THROUGH SMB-4 8.14.1 (Continued)

U b.

If limit switch is being removed for other than relube or replacement, turn the set rod clockwise until it stops.

@ NOT force this disengages the rotor gearing mechanism.

@ NOT change valve position or rotor position until limit switch is reinstalled.

c.

Remove the two screws holding the limit switch gear box bayonet flange to the operator housing.

d.

Remove the limit switch from the operator, e.

If rotor replacement is required, perform the following steps:

1) Remove old rotor by carefully driving out the old groove pin.

NOTE 8.14.le.2 A new rotor should be used along with a new groove pin.

) O~

2) The rotor has guide holes which are slightly under sized. Using a #40 drill, drill the guide holes out. - .

3) The new rotor should be pinned into position carefully by tapping the groove pin through the guide holes in the rotor and rotor drive.

I f.

When a new limit switch is to be installed, lubricate per Step 8.13.11.

g. Ensure 0-Ring on bayonet shaft is in place and does not show any signs of degradation.

Replace if necessary.

I Procedure Text Page 36 of 48

4 37 KP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERAT TYPES SMB-0 THROUGH SMB-4 IT 8.14.1 (Continued)

(s /

NOTE 8.14.1h The finger base may be removed with or without removing the limit switch assembly.

h.

IF the finger base must be removed from the geared limit switch:

Remove the two screws on the top of the finger base and carefully remove.

i.

To install, ensure the finger contact assemblies are properly positioned on the rotors and install the two screws.

8.14.2 Limit Switch Installation a.

Place the limit switch assembly in the operator and install the two screws holding the limit switch gear box bayonet flange to the operator housing.

b.

Turn set rod counterclockwise until it stops DO NOT force.

O'

• Check that intermittent shaft is tight, indicating that rotor gearing is reengaged.

IF NOT, turn set rod clockwise again until '

it stops, AND repeat this step.

8.14.3 Torque Switch Removal a.

Position the valve so the spring pack is relaxed.

b.

Remove the two screws that hold the torque switch to the operator housing.

c.

Remove torque switch from operator housing.

8.14.4 Torque Switch Installation a.

Ensure 0-Ring at the base of the torque switch is in place, and DOES NOT show any signs of degradation.

Replace as necessary.

['

\~ Procedure Text Page 37 of 48

38 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATO TYPES SMB-0 THROUGH SMB-4 8.14.4 (Continued)

[

b.

Install the limiter plate on the torque switch IF the specified torque switch setting allows installation.

c.

Install the torque switch in the operator housing.

The bolt holes on the torque switch should line up closely with the bolt holes on the operator housing.

IF NOT, remove torque switch and repeat this step.

d.

Install the two screws that hold the torque switch to the operator housing.

8.14.5 After switch installation, ensure all electrical leads are connected according to the wiring diagram for the operator.

8.15 Limit Switch Adjustment NOTE 3.15 O Limit switches are driven directly by the same drive train that turns the valve stem. They can be set to operate train.

at any specific number of turns on the gear These switches are normally set to operate at .

the end of travel of the valve stems, thereby identifying the "Open" and " Closed" valve positions.

. NOTE 8.15 l Determine the type of valve the Limitorque actuator is operating and note whether it is a gate, globe, ball, butterfly, plug, diaphragm or other. If the valve is a ball or butterfly type employing KBC operators, set the limit stops per Step 8.17 and proceed to Step 8.15.2 to set the limit switches.

8.15.1 Setting the "Open" Limit Switch on Rising Stem Type Valves l

I l

Procedure Text Page 38 of 48 i

39 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERA TYPES SMB-0 THROUGH SMB-4 8.15.1 (Continued)

• WARNING 8.15.la *

• Ensure all electric power is turned off to *

• prevent the electrical motor drive from turning *

• during switch adjustment. This eliminates the *

• potential injury to servicing personnel or

• damage to the valve.

a.

IF number of handwheel turns, to stroke the valve in MWO.

one direction, is unknown, count and record on

b. Using the manual handwheel:

Position the valve at approximately 90%

"Open."

Note the direction of the intermittent gear shaft when going open (Refer to Figure 10).

c.

Turn the set rod clockwise until it stops (refer to Figure 10) DO NOT force.

d.

By observing rotors outer contacts, note the position the limit switch indicates the valve is in (refer to Figure 11).

e.

IF the limit switch indicates the valve is NOT yet open, turn the intermittent gear shaft in the direction noted in Step 8.15.lb until the rotor contacts rotate to the "Open" position (Refer to Figure 11).

f.

IF the limit switch indicates the valve is "Open" or past "Open":

Turn the intermittent gear shaft in the direction opposite that was noted in Step 8.15.lb until the rotor contacts rotate indicating the valve is NOT open.

Now reverse direction of the intermittent gear shaft and turn until the rotor contacts l rotate to the "Open" position (refer to Figure 11).

l Procedure Text Page 39 of 48

e .

40 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERA TYPES SMB-0 THROUGN SMB-4 8.15.1 (Continued) g.

Rotate stops DO the setforce.

NOT rod counterclockwise until it NOTE 8.15.1h If motor rotation must be checked, refer to Step 8.18 before proceedi'ng.

h. Electrically "Close" the valve.

i.

Electrically "Open" the valve.

J.

Rotate the set rod clockwise until it stops D0_

E force.

N k.

Manually operate the valve to the full "Open" position.

NOTE 8.15.11' If difficulty is encountered determining the point of stem motion, 'matchmarks or a temporary pointer affixed to the stem or yoke may be used.

1.

', Rotate the handwheel in " Closed" direction until f the valve stem starts to move.

i i Now rotate the handwheel in the " Closed" direction an additional .5% of full stroke handwheel turns (i.e., if full stroke is 100 turns, rotate the handwheel 1/2 turn in the

" Closed" direction beyond the point where stem motion starts).

m.

Rotate the set rod counterclockwise until it stops _D0 NOT force.

The intermittent gear shaft should not be sble to be moved by a screwdriver. E it moves, repeat steps 8.15.lb through 8.15.la.

8.15.2 Setting "Open" Limit Switch on Valves Employing HBC Operators.

Procedure Text Page 40 of 48

,g p 9y.-M.T- W- _ . , . . _ _ _ , . _ - - - - - - - - - -

41 MP 1411.05.01 i MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERAT TYPES SMB-0 THROUGH SMB-4

,,s 8.15.2a (Continued)

( )

v

• WARNING 8.15.2a *

• Ensure all electric power is turned off to *

• prevent the electric motor drive from turning *

• on during switch adjustment. This eliminates *

• the potential injury to servicing personnel or

• damage to the valve.

• NOTE 8.15.2a Setpoint for open limit switch may also be provided by MP 1410.32.

a.

Using the manual handwheel, position the valve to the position listed on the Data and Signoff Sheet for limit switch data.

Then the set rod on the limit switch until it stops DO NOT force (this will engage the limit switch for subsequent steps).

(\

Ns (S0) b. Using the manual handwheel, "Close" then fully i "Open" the valve noting the direction of rotation of the intermittent gear shaft (refer to Figure 11). -

l Count the number of handwheel turns from full " Closed" to full "Open" and enter on Data and Signoff Sheet.

NOTE 8.15.2c If difficulty is encountered determin-ing the point of stem motion, matchmarks or a temporary pointer affixed to the stem or yoke may be used.

c. With the valve fully "Open" it must be " Closed" slightly to allow for backlash and coastdown.

Rotate the handwheel in the " Closed" direc-l tion until the valve stem starts to move.

t i

l

() Procedure Text Page 41 of 48 l

l 1

- . , - . . ._ . . , . . ._ _ .m--.._ ,_ , . . _ , - . . . . . - . . . . - - , , . , , , . _ _ , . _ . . - . . , .

~ ~ _-

~-

42 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4

-x 8.15.2c (x_/ ) (Continued)

Now rotate the handwheel in the " Closed" direction an additional 1/2% of full stroke handwheel turns (i.e., if full stroke is 100 turns, rotate the handwheel 1/2 turn in the

" Closed" direction beyond the point where stem motion starts),

d.

Turn the set rod clockwise until it stops (refer to Figure 10) DO NOT force.

e.

By observing rotors outer contacts, note the position the limit switch indicates the valve is in (refer to I;.gure 11).

f.

IF the limit switch indicates the valve is NOT yet open, turn the intermittent gear shaft in the direction noted in Step 8.15.2b, until the rotor contacts Figure 11).

rotate to the "Open" position (refer to g.

IF the limit switch indicates the valve is "Open" OR past "Open," turn the intermittent gear shaf t in the direction opposite that noted in g-~g Step 8.15.2b until the rotor contacts rotate

/

(indication of valve NOT "Open").

v Now reverse direction on the intermittent gear shaft and turn until the rotor contacts rotate to the "Open" position (refer to Figure 11).

h.

Rotate stops DOthe setforce.

NOT rod counterclockwise until it This re-engages the rotor gearing mechanism for normal operation.

The intermittent gear shaft should not be able to be moved with a screwdriver.

IF it moves repeat Step 8.15.2d, through 8.15.2h.

8.15.3 Setting Closed Limit Switch on Ball, Butterfly, Plug or Other Non-Wedging Type Valves

\'O,,/

Procedure Text Page 42 of 48

43 HP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4 m 8.15.3 (Continued)

• WARNING 8.15.3a *

• Ensure all electric power is turned off to *

• preventswitch during the electric motor drive from turning on adjustment.

• This eliminates the *

• potential injury to servicing personnel or

• damage to the valve. *

(S0) a. Manually operate the valve in the " Closed" direction.

Note the direction of rotation of the

" Closed" rotor intermittent gear shaft (refer to Figure 11).

b.

With the valve fully closed, it must be opened slightly to aliow for backlash and coastdown.

Rotate the handwheel in the "Open" direction until the valve stem starts to move.

NOTE 8.15.3b If difficulty is encountered determining the point of stem .

motion, matchmarks or a temporary pointer affixed to the stem or yoke may be used.

c.

Turn the set rod clockwise until it stops (re-fer to Figure 10) DO NOT force.

By observing roters outer contacts, note the position the limit switch indicates the valve is in (refer to Figure 11).

d.

IF the limit switch indicates the valve is NOT yet closed, turn the intermittent gear shaft in the direction noted in Step 8.15.3a, until the rotor contacts rotate to the " Closed" position (refer to Figure 11).

e.

IF the limit

%osed" switch or past indicates the valve is

" Closed":

i I

s.

Procedure Text Page 43 of 48

44 KP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERA TYPES SMB-0 THROUGH SMB-4 8.15.3e (Continued)

)

• Turn the intermittent gear shaft in the direction opposite that noted in Step 8.15.3a, until the rotor contacts rotate (indication of valve not " Closed").

Now reverse direction on the intermittent gear shaf t and turn until the rotor contacts rotate to the " Closed" position (refer to Figure 11).

f.

Rotate stops DOthe setforce.

NOT rod counterclockwise until it This re-engages the rotor gearing mechanism for normal operation.

The intermittent gear shaft should not be able to be moved with a screwdriver.

IF it moves, repeat Steps 8.15.3c through 8.15.3f.

8.15.4 Setting Closed Limit Switch on Wedging Type Gate, Globe, and Diaphragm Valves rs f

NOTE 8.15.4 NJ To ensure proper operation of the torque bypass switch during valve unseating MP 1410.32 will provide the proper " Closed" limit switch settings.

• WARNING 8.15.4a *

• Ensure all electric power is turned off to *

• prevent the electric motor drive from turning *

• on during switch adjustment. This eliminates *

• the potential injury to servicing personnel

• or damage to the valve. *

a. Using the MOVATS test equipment:

Position the valve at the point where the "Open" bypass is to drop out.

g, Procedure Text Page 44 of 48

45 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPE TYPSS SMB-0 THROUGH SMB-4 8.15.4a (Continued)

Note the direction of rotation of the

" Closed" rotor intermittent gear shaft (refer to Figure 11).

b.

Turn the set rod clockwise until it stops (Refer to Figure 10) DO NOT force, c.

By observing rotor's outer contacts, note the position in.

the limit switch indicates the valve is E the limit indicates the valve is NOT yet

" Closed," turn the intermittent gear shaft in the direction noted in Step 8.15.4a until the rotor contacts rotate to the " Closed" position (refer to Figure 11).

d.

IF the Limit 51osed" or past Switch indicates the valve is

" Closed":

Turn the intermittent gear shaft in the direction opposite that was noted in Step S.15.4a until the rotor contacts rotate (indication of valve not " Closed").

'J

• Now reverse direction on the intermittent gear shaf t and turn until the rotor contacts rotate to the " Closed" position (refer to Figure 11).

e.

Rotate stops DOthe NOT setforce. rod counterclockwise until it This Re-engages the rotor gearing mechanism for normal operation.

The intermittent gear shaft should not be able to be moved with a screwdriver.

E it moves, repeat Steps 8.15.4b through 8.15.4e.

8.15.5 Setting Four Trained Geared Limit Switches a.

A four train limit switch is essentially two, two train limit switches installed top to bottom (refer to Figure 10). The upper set of rotors are the "Open" and " Closed" rotors and are set per Steps 8.15.1 through 8.15.4, applicable.

Procedure Text Page 45 of 48

46 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4 8.15.5 (Continued) b.

The lower set of rotors are set in the same manner as the upper and are used for control functions. Position setting for these rotors will be supplied by Maintenance Engineering.

8.16 Torque Switch Settina (Refer to Figure 9)

NOTE 8.16 Torque switch settings will be provided by MP 1410.32 or by Engineering.

NOTE 8.16 The magnitude of the compression of the torque spring is empirically calibrated in foot pounds and a name plate is affixed to each switch compartment (refer to Figure 9) denoting the calculated torque output at that setting. The maxicam setting allowed by Limitorque for the particular application is also marked on the torque switch calibration tag.

8.16.1 Torque setting must be made with switch mounted in the Limitorque operator.

(} 8.16.2 Make sure all electric power is off.

l 8.16.3 Manually or electrically position the valve in an intermediate position (spring pack relaxed).

8.16.4 Loosen the adjusting screws and move the pointers to the required setting.

Tighten the adjusting screws.

8.16.5 Operate valve electrically in conjunction with MP 1410.32 to determine if torque switch is operating properly.

IF further adjustment is required, repeat Step 8.16.

8.17 Settina Position Limit Stops HBC-4 Through HBC-10 Units 8.17.1 With the valve in the full "Close" position, remove stop screw cover.

8.17.2 Remove lock screw.

O Procedure Text Page 46 of 48

47 MP 1411.05.01

^

MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATO TYPES SMB-0 THROUGH SMB-4 s' 8.17.3 Adjust appropriate stop screw based on rotation of drive sleeve inward IF valve is " Closed" AND stop has NOT been reached, OR outward if stop has been reached AND valve is gN yet fully " Closed."

8.17.4 Once stop screw is set, lock securely with lockscrew.

8.17.5 Operate the valve to fully "Open" position and set open stop in same manner.

8.17.6 Replace stop screw cover.

8.18 Maintenance, Energization Repair and Checkout of Limitorque Operators Following or New Installation NOTE 8.18.1 MOVATS test unit may be installed at this time.

8.18.1 Manually place valve in the mid position. Check for correct polarity by energizing the "Open" circuit for about one second.

a.

IFCorrect.

is valve travels in the "Open" direction polarity f-,

b.

--] IF valve travels in the " Closed" direction.

Deenergize the circuit immediately.

Exchange any two (2) phases if AC, OR IF DC, reverse the A t and A2 connections.

8.18.2 Energize the valve in the "Open" direction.

After the motor has stopped, turn the actuator handwheel to ascertain whether adequate clearance exists between the position at which the valve stem comes to rest and valve back seat.

8.18.3 Energize the valve in the " Closed" direction.

After the motor has stopped, turn the actuator handwheel to determine if proper seating has occurred.

's.

Procedure Text Page 47 of 48

48 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATORS TYPES SMB-0 THROUGH SMB-4 8.18.3 (Continued)

)

• In the case of wedging type valves difficulty in turning the handwheel in the "Open" direction should be encountered until the gate or globe clears the seat.

For non-wedging valves, the handwheel should NOT turn in the "Close" direction, but should turn relatively easily in the "Open" direction.

8.18.4 Operate the valve through two complete cycles of "Open" and "Close" to ensure proper operation.

8.18.5-IF during checkout adjustments are necessary, refer to the appropriate section of this procedure.

8.18.6 Ensure Data and Signoff Sheet is completed to the maximum extent possible.

8.19 Inspection and Testing 8.19.1 For Type C Containment Isolation Valves (as listed in ST 5061.02, ILRT), a Local Leak Rate Test (LLRT) will be performed as determined by Maintenance Engineer.

LLRT must be performed if repairs may have affected the valve seating capabilities.

) 8.19.2 For Containment Isolation Valves as listed in ST 5064.01, perform cycling test and record isolation time (where applicable) per ST 5064.01. '

8.19.3 If needed, take stem measurement per Enclosure 3, Stem Measurement.

9.0 DOCUMENTATION 9.1 Attach Enclosure 1 to and process it with the MWO.

i.

s Procedure Text Page 48 of 48

r '

49 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPE TYPES SMB-0 THROUGH SMB-4

/N DATA AND SIGNOFF SHEET

(,-) STEP DATA INITIALS /DATE 6.2.3 General Data Equipment No.

Location /_

, Operator Type / Size Planner / Performer Serial No.

Order No.

Handwheel Turns Full Stroke 6.2.4 Operator and Valve Matchmarked /

Performer 8.1.7 Switch Information Valve Position Open/Cosed /

Limit Switch Performer Color Red / Brown / White 2 Train /4 Train Gear Box Type Brass / Aluminum Torque Switch Setting _

Color Brown / White / Red 8.2/8.3/ Operator Removed 8.4/8.5 /

Performer l 8.5.2

[/)

L Housing Cover Gasket Thickness in.

/

Performer 8.4.10/8.5.3 Stem Nut Information l One piece /two piece /

l threaded /non-rising Performer 8.6.2d Insulation Resistance *F

/

Megohms Performer (Uncorrected)

Megohms (Corrected) 8.6.6a Retaining Rings in Number of Rings Front of Declutch Link /

Performer 8.6.6b Retaining Rings Number of Rings /

between Declutch Link and Housing Performer 8.8.1 Drive Sleeve Installed

/

Performer 8.8.2* Worm Shaft Installed

/

MWO No. Performer

() Enclosure 1 Page 1 of 3 T-' we ae 4-- ,-e.<-.---.a- . -, y--,. - , . .%-.%_--% ,-,-r -+---,.-v-.,,y-,mr--- ,.--------_ww----n-,,,,w--, y,w-.w.-.-----

50 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATOR TYPES SMB-0 THROUGH SMB-4 7g DATA AND SIGNOFF SHEET (Continued)

() STEP DATA INITIALS /DATE 8.8.3 Handwheel Shaft Installed /

Perfo rmer 8.8.3t Spring Pack Locknut Set /

Performer 8.8.4 Clutch Housing Installed

/

Perfo rmer 8.8.5 Drive Motor Installed

/

Performer 8.8.6 Electrical Components Installed /

Performer 8.9.1 Spring Pack Part Number Disassembled / Assembled /

Perfo rmer 8.9.1c Limit Sleeve to in.

Thrust Washer Distance /

Performer 8.9.1d Stop Nut Removed Turns /

Performer

()8.9.lg

~ Belleville Washers Fumber Removed Thickness

/

in. each Performer 8.9.1q Stop Nut Installed

/

Perfo rmer 8.9.1r Limit Sleeve to in.

/

Thrush Washer Distance Perfo rmer 8.9.2 Drive Sleeve

/

Disassembled / Assembled Performer 8.9.2h Bearing Journals Lubricated /

Performer 8.9.3 HBC Disassembled

/

Perfo rmer 8.9.4 KBC Assembled

/

Performer MWO No.

j i

i Enclosure 1 Page 2 of 3 l

~ -

e- - - - , , - mgn - , , - - ,w,--n.- , ,,,--g--, ,, . _ . - . - - . - . -- - - - -

51 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPER TYPES SMB-0 THROUGH SMb-4 j-~ DATA AND SIGNOFF SHEET (Continued)

( ,) STEP DATA INITIALS /DATE 8.9.4c Worm and Worm Bearing Lubricated /

Performer 8.10/8.11/ Operator 8.12 Installed /

Performer 8.12.1 Stem and Stem Nut Lubricated /

Performer 8.12.6 Lock Nut Staked

/

Performer 8.13.1 Operator and Limit Switch Lubricated /

Performer 8.13.11 Limit Switch Data Counter Gear Sets 4/5 /

(Circle one) Performer COMMENTS:

V t

/

Signature Date Performed by i

Enclosure 1 Page 3 of 3

. - - - . . . - - . .. = . . - . .

52

.T 1411.05.01 TYPE MB UGH MB FIGURES O

1 O \ /

4 CUTAWAY VIEW OF S SMB 0 LIMITORQUE VALVE CONTROL

~'

O  ::,'. ;": 12

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S l 59 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATO TYPES SMB-0 THROUGH SMB-4 I

FIGURES (Continued)

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N 60 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPER TYPES SMB-0 THROUGH SMB-4 FIGURES (Continued)

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Enclosure 2 Page 9 of 12

/ N 61 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPE TYPES SMB-0 THROUGH SMB-4 FIGURES (Continued)

TWOTRAINGEARED LIMITSWITCH-ROTORTYPE TWO TE AlN '# '8 FOWE 78AIN

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f 62 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERA TYPES SMB-0 THROUGH SMB-4 O FIGURES (Continued)

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F X 63 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPER TYPES SMB-0 THROUGH SMB-4 FIGURES (Continued)

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Enclosure 2 Page 12 of 12

/ .

64 MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPERATOR TYPES SMB-0 THROUGH SMB-4 STEM MEASUREMENT m

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Determine the number of thread starts.

NOTE:

A convenient method is to wrap a string around the stem following one thread. If there are no gaps between the string, it is a single thread; I gap = double thread; 2 O 2.

gaps = triple thread.

Count the number of lands in 1 inch = threads per inch (TPI).

3.

Pitch will be determined by determining the threads per inch then ~

packing the pitch from Page 2.

4.

To determine thread lead multiply pitch X number of starts.

5. Take stem OD as shown. Also, take CD of unthreaded portion of stem, i

O" Enclosure 3 Page 1 of 2

I c.

65 o MP 1411.05.01 MAINTENANCE AND REPAIR OF LIMITORQUE VALVE OPE TYPES SMB-0 THROUGH SMB-4 f-STEM MEASUREMENT (Continued)

ACME SCREW THREADS Table I.

American Standard General Purpose Acme Screw Thread Form - Basic Dimensions (ASA Bl.5-1952)

Thds. Height Of Pitch, Total Thread per Thread Height Of Crest of Root of Inch (Basic), Thickness Internal Internal Thread, (Basic), Thread Thread (Basic),

" p/2 - 0.3707p -

p = I/" p/2 0.259 X allowance p/2 0.3707p allowance 16 0.00250 0.03125 0.0302 14 0.07143 0.03125 0.0232 0.0200 0.03571 0.0407 12 0.08333 0.03571 0.0205 0.0239 0.04107 0.0407 10 0.10000 0.04107 0.0309 0.0283 0.05000 0.0600 0.05000 8 0.12500 0.0371 0.0319 0.00250 0.0725 6 0.16667 0.00250 0.0403 0.0411 0.08333 0.0933 5 0.20000 0.08333 0.0618 0.0566 0.10000 0.1100 4 0.25000 0.10000 0.0741 0.0689 0.12500 0.1350 0.12500 3 0.33333 0.16667 0.0927 0.0875 0.1707 0.16667 2\ 0.40000 0.20000 0.2100 0.1230 0.1184 2 0.50000 0.20000 0.1483 0.1431 0.25000 0.2600 0.25000 p).

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1 1 1/3 0.66667 0.75000 0.33333 0.37500 0.3433 0.33333 0.1853 0.2471 0.1802 0.2419 0.3850 0.37500 0.2780 1 1.60000 0.50000 0.5100 0.2728 0.50000 0.3707 0.3655 All dimensions are in inches.

Allowance threads. is 0.020 inch for threads per inch and coarser, and 0.010 inch for finer i

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l O Enclosure 3 END Pa8e 2 of 2 I

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