ML20141F511

To MP 715.5, Overhaul of Fisher Type-667 Actuators

ML20141F511
Person / Time
Site:	Millstone
Issue date:	06/23/1997
From:	NORTHEAST NUCLEAR ENERGY CO.
To:
References
MP-715.5, NUDOCS 9707030024
Download: ML20141F511 (43)

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• NDS Document Transmittal 6/23/97 To:

Nuclear Regulatory Commission Addressee Unique # 140 Document Control Desk ROUTINE distribution 1

j Washington, D.C. 20555 The following documents have been revised. You are currently on distribution for these documents. Verify that all documents are included in this distribution set.

DOCUMENT REDI COPIES MP 715.5 2

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Return this form to NDS, MP475,3rd Floor, C/o Rick Lundin (x2446) as soon as received.

Signature Date:

9707030024 970623 PDR ADOCK 05000245 P

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MILLSTONE NUCLEAR POWER STATION MAINTENANCE PROCEDURE J

Overhaul of Fisher Type-667 Actuators MP 715.5 I

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Level of Use SME: R. Kirk Generai

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Maintenance Procedure Overhaul of Fisher Type-667 Actuators l

TABLE OF CONTENTS 1.

PURPOSE....................................................2 2.

P R E R EQ U I S ITES.............................................

3 3.

P R ECAUTI O N S...............................................

5 4.

I N STR U CTI O N S..............................................

6 4.1 Act ua tor Re mova l........................................

6 4.2 Actuator Disassembly - Models 30 Through 60..............

8 4.3 Actuator Disassembly - Models 70 and 87...................

11 4.4 Actuator Inspection and Repair............................

13 4.5 Actuator Assembly - Models 30 Through 60.................

15 4.6 Actuator Assembly - Models 70 and 87....................

18 4.7 Actuator Installation.....................................

21 4.8 Actuator Stroke Adjustment...............................

21 4.9 Operational Checkout...................................

31 5.

REVIEW AND SIGN-OFF...................................

34 6.

R E FE R EN CES..............................................

34 7.

S UMM ARY OF CHANG ES....................................

35 ATTACHMENTS AND FORMS, " Actuator Specifications"...........................

36," Fisher Type-667 Actuator, Sizes 30 Through 60"......

37, " Fisher Dpe-667 Actuator, Size 70".................

38," Fisher Type-667 Actuator, Size 87".................

39," Top-Mounted Handjack Assembly for Size 30 Through 60 Actuators"................................

40," Top-Mounted Handjack Assembly for Size 70 and 87 Actuators"....................................

41 MP 715.5 Level of Use STOP THINK ACT REVIEW Rev.2 General iof41

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1. PURPOSE O-1.1 Objective This objective of this procedure is to provide instructions to overhaul Fisher type-667 actuators, sizes 30 through 70 and 87.

1.2 Discussion This procedure provides instructions to remove, disassemble, clean, inspect, assemble, install, adjust, and operationally check Fisher type-667 diaphragm actuators. Instructions are also provided to remove and install optional top-mounted handjack assemblies.

1 Each of these actuators is a reverse-acting, spring-opposed diaphragm actuator that positions the valve plug in response to pneumatic loading pressure on the actuator diaphragm. When air pressure is applied to the lower chamber of the actuator, the actuator stem moves upward and compresses the actuator spring. When air pressure is removed, the spring moves the actuator stem downward. Depending on the configuration of I

the valve (lift-to-close or lift-to-open), this will cause the valve to l

either open or close.

p The actuators can be equipped with optional top-mounted handjack C

assemblies. The top-mounted handjack assembly is typically used as an adjustable down-travel stop. Handjack assembly maintenance is limited to lubricating the handjack screw and thrust bearing. The manufacturer recommends no reolacement parts for top-mounted handjack assemblies.

In the event that air pressure to the diaphragm is lost, the actuator stem moves to the extreme downward position. provides a table of actuator specifications. illustrates actuator sizes 30 through 60.

i illustrates actuator size 70. illustrates actuator size 87.

< illustrates the top-mounted handjack assembly used on actuator sizes 30 through 60. illustrates the top-mounted handjack assembly used on actuator sizes 70 and 87.

1.3 Applicability Fisher type-667 diaphragm actuators, sizes 30 through 70 and 87.

hip 715.5 Level of Use e

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2. PREREOUISITES V

2.1 General 2.1.1 An acceptable actuator stem total indicated runout value has l

been obtained from FLS and recorded onto AWO.

2.1.2 Planned actuator maintenance has been evaluated to determine if the scope of work falls under the ASME Section XI Repair and Replacement Program.

2.2 Documents 2.2.1 WC 10 (Att)," Lifted Lead and Jumper Device Data Sheet" i

l 2.3 Measuring and Test Equipment (M&TE) 2.3.1 All M&TE has been calibrated in accordance with WC 8,

" Control and Calibration of Measuring and Test Equipment" and the calibration is current.

2.3.2 Dial indicator with a range of 1 inch and an accuracy of 0.0005 inch such as QA-1502 l

4 2.3.3 QA torque wrenches (click or dial type) with a minimum accuracy and maximum torque wrench full-scale value listed in the table below for the specified torque application range.

Specified Torque Maximum Torque Wrench Minimum Accuracy Application Range Full-Scale Value 15 to 20 ftelbs Between 75 and 100 ft lbs 5%

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!O MP 715.5 Level of Use Rev.2 S' "

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^r aeview General 3 of 41

~x 2.4 Tools and Consumables 2.4.1 Tools Mechanic's standard tool kit 2.4.2 Equipment 1 t Chain fall or hoist and slings (minimum capacity /2 on)

Cribbing Temporary regulated air supply (including gages, regulator, adapters, fittings, and hoses or tubing) capable of pressurizing actuator V-blocks or lathe 2.4.3 Spare Parts (As Required)

Diaphragm Gasket V

Seal Bushing 0-ring Yoke to Lower Diaphragm Case O-ring (Size 70 and 87 only) l n

2.4.4 Consumables Nuclear Grade Never Seez Lubriplate MAG-10-ring lubricant i

Approved cleaning solvent, such as Polywater

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IlydraFoam 2020 Fine-grit abrasive l

Herculite j

l Low-lint cloths j

Scotch-Brite pads or crocus cloth l

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N_,I MP 715.5 Level of Use STOP THINK ACT REVIEW Rev.2 Gened 4 of 41 1

2.5 Responsibilities ly 2.5.1 If required,I&C Department is responsible for removing, installing, or adjusting positioners or transmitters. I&C Department is also responsible for adjusting handjack assemblies.

3 i _

2.5.2 Operations Department is responsible for pressurizing and depressurizing actuator during opeiational checkout.

3. PRECAUTIONS i

3.1 Ensure valve is isolated from process flow and pressure before attempting actuator maintenance.

4 3.2 Ensure valve actuator is pneumatically isolated and vented before j

attempting actuator maintenance.

3.3 Actuator contains a powerful spring. Ensure spring tension is relieved l

before removing upper diaphragm case.

3.4 The " Maximum Diaphragm Pressure to Stroke Actuator" value shown in

, must not be exceeded before the travel stop contacts the upper diaphragm plate. If this value is exceeded before the travel stop l ('

contacts the upper diaphragm plate, the maximum allowable valve stem load may be exceeded.

3.5 The " Maximum Excess Diaphragm Pressure" value shown in Attachment 1 is the pressure that may be added when the actuator is at full travel. The sum of the pressure required to stroke the valve fully and the excess pressure added when the actuator is against the stop must not exceed the " Maximum Diaphragm Casing Pressure" value shown in Attachment 1.

i 3.6 Match mark disassembled components as necessary to aid in reassembly.

Do not match mark delicate parts or critical mating surfaces.

4 3.7 Gaskets,0-rings, and seals exposed during disassembly should be replaced.

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3.8 Planned actuator maintenance should have been evaluated to determine if the scope of work falls under the ASME Section XI Repair and Replacement Program. Avoid losing any pressure-retaining parts, especially fasteners. If lost, pressure-retaining replacement parts must be certified under the Section XI Repair and Replacement Program.

3.9 All consumables used in or on power plant components must be controlled in accordance with CC 1, " Control of Chemical Consumable Products."

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MP 715.5 Level of Use gg STOP TH!NK ACT REVIEW Rev.2 5 of 41

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4. INSTRUCTIONS Q

4.1 Actuator Removal i

STOP WARNING STOP To prevent injury to personnel and damage to equipment, l

Valve must be isolated f, rom process flow and pressure before attempting actuator mamtenance.

Valve ac attempt,tuator must be pneumatically isolated and vented before mg actuator mamtenance.

t 4.1.1 ENSURE the following:

Valve is isolated from process flow and pressure.

Valve actuator is pneumatically isolated and vented.

4.1.2 E actuator is equipped with a top-mounted handjack assembly, TURN handwheel clockwise until spring tension is relieved.

4.1.3 DISCONNECT instrument air supply from actuator.

4.1.4 E applicable, MOVE or DISCONNECT limit switch assemblies as required to allow actuator removal.

4.1.5 E limit switches were disconnected, RECORD lifted leads onto WC 10 (Att)," Lifted Lead and Jumper Device Data Sheet."

4.1.6 E applicable, REQUEST I&C Department to disconnect the following:

Positioner Transmitter Transducer lO MP 715.5 Level of Use 8' "

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NOTE To aid in reassembly of the actuator, the number of actuator stem threads below the spring adjuster can be counted.

4.1.7 COUNT number of actuator stem threads below the spring adjuster, and RECORD number onto AWO.

STOP WARNING STOP To prevent injury to personnel, spring tension must be relieved before disassembling actuator.

4.1.8 TURN spring adjuster toward stem connector until all spring tension is relieved.

NOTE To aid in reassembly of the actuator, the number of valve stem threads p

below the stem connector can be counted.

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4.1.9 COUNT number of valve stem threads below the stem connector, and RECORD number onto AWO.

4.1.10 REMOVE capscrews securing stem connector halves, and SEPARATE stem connector halves.

4.1.11 IE necessary, RIG and SUPPORT weight of actuator.

4.1.12 IE actuator is supported by brackets, REMOVE actuator support brackets.

NOTE Size 30 through 70 actuators are secured to the valve bonnet by a locknut.

Size 87 actuators are secured to the valve bonnet by capscrews and nuts.

4.1.13 REMOVE fastener (s) securing actuator to bonnet, and REMOVE actuator from valve.

MP 715.5 i

Level of USe ST P THINK AT REVIEW Rev.2 General 7 of 41 I

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O sort 1.

On some valves the travelindicator is not installed.

2.

The travel indicator may be a disc-type indicator installed between the stem connector and stem locknuts or a pointer fastened to the side of the stem connector.

4.1.14 E travel indicator is a disc-type indicator, REMOVE travel indicator from valve stem.

4.2 Actuator Disassembly - Models 30 Through 60 4.2.1 Refer To Attachment 2, and REMOVE spring adjuster.

4.2.2 REMOVE spring seat.

4.2.3 REMOVE actuator spring.

4.2.4 E actuator is not equipped with a top-mounted handjack assembly, REMOVE upper diaphragm case.

4.2.5 E actuator is equipped with a top-mounted handjack assembly, p'

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Refer To Attachment 5 and REMOVE handjack assembly as follows:

a.

REMOVE capscrews securing handjack assembly to actuator.

b.

ENSURE guide plate is free to turn between the handwheel body and mounting plate.

c.

POSITION wrench on castle nut, and UNSCREW extension rod from connector.

d.

REMOVE fasteners securing upper diaphragm case and lower diaphragm case.

e.

REMOVE upper diaphragm case and handjack assembly as a single assembly.

MP 715.5 Level of Use STOP THINK ACT REVIEW Rev. 2 gg 8 of 41

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NOTE To aid in reassembly of the actuator, the number of turns required to remove the travel stop should be counted, f.

COUNT number of turns required to remove travel stop, and RECORD number onto AWO.

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g.

REMOVE capscrews securing handjack assembly to upper l

diaphragm case, and REMOVE the following:

i llandjack assembly l

Guide plate Mounting plate

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h.

REMOVE extension rod.

C AUTIO N To prevent damage to O-rings as the actuator stem threads pass through the seal bushing, caution must be used when removing the actuator stem assembly.

4.2.6 Refer To Attachment 2, and careftdly REMOVE the following as an assembly, and ENSURE actuator stem threads do not damage O-rings:

Actuator stem Diaphragm Upper and lower diaphragm plates l

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MP 715.5 Level of Use STOP THINK ACT REVIEW Rev.2 General 9 gg 41

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4.2.7 E actuator is not equipped with a top-mounted handjack (s]

assembly, REMOVE travel stop capscrew, and SEPARATE the following:

Spacer Upper diaphragm plate l

Diaphragm Lower diaphragm plate Actuator stem 4.2.8 E actuator is equipped with a top-mounted handjack assembly, REMOVE connector, and SEPARATE the following:

Washer Uppcr diaphragm plate Diaphragm Lower diaphragm plate Actuator stem l

l 4.2.9 REMOVE seal bushing snap ring.

1 4.2.10 REMOVE seal bushing.

4.2.11 REMOVE O-rings from seal bushing.

4.2.12 REMOVE capscrews securing lower diaphragm case to yoke.

4.2.13 REMOVE lower diaphragm case gasket.

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MP 715.5 Level of Use Rev.2 ST P THINK ACT REVIEW General 10 of 41

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,h 4.3 Actuator Disassembly - Models 70 and 87

<\\J 4.3.1 Refer To Attachment 3 or 4 as applicable, and REMOVE spring adjuster.

i 4.3.2 REMOVE spring seat.

4.3.3 REMOVE actuator spring.

4.3.4 IE actuator is not equipped with a top-mounted handjack assembly, REMOVE upper diaphragm case.

1 4.3.5 IE actuator is equipped with a top-mounted handjack assembly, I

Refer To Attachment 6 and REMOVE handjack assembly as follows:

a.

REMOVE groove pin.

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b.

REMOVE castle nut.

I c.

REMOVE bearing retainer.

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d.

REMOVE thrust bearing.

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REMOVE fasteners securing upper diaphragm case and lower diaphragm case.

3 f.

REMOVE upper diaphragm case and handjack assembly as a single assembly.

NOTE To aid in reassembly of the actuator, the number of turns required to remove the travel stop should be counted.

g.

COUNT number of turns required to remove travel stop, and RECORD number onto AWO.

h.

REMOVE capscrews securing handjack assembly to upper diaphragm case, and REMOVE handjack assembly.

i.

REMOVE extension rod.

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Level of Use THINK ACT REVIEW Rev. 2 MP 715.5

-STOP 11 of 41

l C A UTIO N 4

To prevent damage to 0-rings as the actuator stem threads pass through the seal bushing, caution must be used when removing the actuator stem assembly.

4.3.6 Refer To Attachment 3 or 4 as applicable, and carefielly REMOVE the following as an assembly, and ENSURE actuator stem threads do not damage O-rings:

Actuator stem Diaphragm Upper and lower diaphragm plates 4.3.7 IE actuator is not equipped with a top-mounted handjack assembly, REMOVE travel stop capscrew, and SEPARATE the following:

Spacer Upper diaphragm plate a

Diaphragm Lower diaphragm plate Actuator stem 4.3.8 IE actuator is equipped with a top-mounted handjack assembly, REMOVE connector, and SEPARATE the following:

Washer Upper diaphragm plate Diaphragm Lower diaphragm plate Actuator stem O

4.3.9 REMOVE seal busing snap ring.

G MP 715.5 Level of Use ST P THINK ACT REVIEW Rev.2 General 12 of 41

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4.3.10 REMOVE seal bushing.

4.3.11 REMOVE O-rings from seal bushing.

4.3.12 REMOVE capscrews securing lower diaphragm case to yoke.

4.3.13 REMOVE O-ring from yoke.

4.4 Actuator Inspection and Repair C AUTIO N To ensure proper operation of valve, all re 3 airs and replacement components must be evaluated by Work Management, and an "ASME Section XI Repair / Replacement Plan" must be prepared and approved as necessary for pressure-retaining components.

NOTE When cleaning valve components, particular attention should be paid to

]V cleaning machined surfaces, threac ed fasteners, mating flanges, spring, O-rmg recesses, actuator stem, and seating surfaces.

4.4.1 Using an approved cleaning solvent and low-lint cloths, CLEAN all valve components.

4.4.2 Using a fine-grit abrasive or Scotch-Brite pads, REMOVE the following from all mating surfaces and 0-ring grooves:

Dirt Paint Burrs Loose scale Raised surfaces U]

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.MP 715.5 Level of Use ST P THINK ACT REVIEW Rev.2 General 13 of 41

r NOTE 1.

Structural defects and damage include breakage, cracks, deformation, distortion, corrosion, pitting, scoring, scratches, erosion, galling, and indications of misalignment.

2.

When inspecting stem, particular attention should be paid to the area i

of the stem that passes through the seal bushing.

3.

Handjack assembly maintenance is limited to lubricating the handjack screw and thrust bearing. The manufacturer recommenos no replacement parts for top-mounted handjack assemb!ies.

l 4.4.3 INSPECT the following for wear, structural defects, and damage:

4 Threaded fasteners Yoke 4

Upper and lower diaphragm cases Upper and lower diaphragm plates Seal bushing (q

4 Vent assembly Stem Stem connector i

Spring adjuster Spring Travel indicator Handjack assembly 4.4.4 IE inspection results are not satisfactory, REPAIR or REPLACE applicable component (s).

4 MP 715.5 Level of Use STOP THINK ACT REVIEW Rev.2 Genemi 14 of 41

jm 4.4.5.

Visually INSPECT diaphragm for the following:

Cuts Wear i

Deformation and distortion 4.4.6 IE inspection results are not satisfactory, REPLACE diaphragm.

4.4.7 Using a dial indicator and V-blocks or lathe, INSPECT actuator stem runout at the following locations:

Seal bushing Spring adjuster i

Stem connector j

4.4.8 RECORD measured TIR values onto AWO.

4.4.9 IE stem TIR is greater than allowable value specified by FLS and entered onto AWO, REPAIR or REPLACE actuator stem.

OG 4.5 Actuator Assembly - Models 30 Through 60 1

4.5.1 Refer To Attachment 2, and INSTALL lower diaphragm case gasket onto top of yoke.

4.5.2 POSITION lower diaphragm case onto yoke.

4.5.3 INSTALL and evenly TIGHTEN capscrews securing lower diaphragm case to yoke.

4.5.4 Using Lubriplate MAG-1, LUBRICATE all O-rings.

4.5.5 INSTALL O-rings into seal bushing.

4.5.6 Using Nuclear Grade Never Seez, FILL seal bushing.

4.5.7 POSITION seal bushing into yoke.

4.5.8 INSTALL snap ring securing seal bushing in yoke.

4.5.9 INSTALL the following over top of actuator stem:

MP 715.5 Level of Use THINK ACT REVIEW Rev. 2 STOP gg g

15 of 41

a.

Lower diaphragm plate

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b.

Diaphragm i

c.

Upper diaphragm plate l

4.5.10 1E actuator is not equipped with a top-mounted handjack assembly, PERFORM the following:

a.

INSTALL spacer.

b.

INSTALL and TIGHTEN travel stop capscrew into actuator stem.

C AUTIO N To prevent damage to 0-rings as the actuator '. tem threads pass through the seal bushing, caution must be used when installing the actuator stem assembly.

c.

Carefidly INSTALL the following as an assembly, and fD ENSURE actuator stem threads do not damage O-rings:

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Actuator stem Diaphragm Upper and lower diaphragm plates d.

INSTALL vent assembly in upper diaphragrr. case.

e.

POSITION upper diaphragm case over diaphragm, and ENSURE holes in diaphragm and upper and lower diaphragm cases are aligned.

f.

INSTALL, but do not tighten, fasteners securing upper diaphragm case and lower diaphragm case.

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MP 715.5 Level of Use SW M

W HEW Rew 2 Genera 16 of 41

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4.5.11 IE actuator is equipped with a top-mounted handjack assembly, Refer To Attachment 5 and INSTALL handjack assembly as follows:

a.

INSTALL and TIGHTEN connector into actuator stem.

b.

POSITION the following onto upper diaphragm case:

l

1) Mounting plate

2) Guide plate

3) Handjack assembly I

c.

INSTALL and TIGHTEN capscrews securing the following to upper diaphragm case:

Handjack assembly i

Guide plate i

Mounting plate 4

d.

THREAD travel stop into upper diaphragm case to the position observed during disassembly and recorded on AWO.

iiD e.

INSTALL, but do not tighten, extension rod into connector.

f.

POSITION upper diaphragm case and handjack assembly over extension rod.

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g.

TIGHTEN extension rod into connector.

h.

LOOSEN extension rod 2 turns to ensure that diaphragm can travel full stroke.

4 i.

ALIGN holes in handjack housing guide plate, and mounting plate.

j.

INSTALL and TIGHTEN capscrews securing handjack j

assembly to actuator, i-l k.

POSITION upper diaphragm case over diaphragm, and ENSURE holes in diaphragm and upper and lower diaphragm cases are aligned.

i 1.

INSTALL, but do not tighten, fasteners securing upper diaphragm case and lower diaphragm case.

.MP 715.5 Level of Use

' THINK.

Rev.2 STOP' ACT REVIEW ggggg 17 of 41 i

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C AUTIO N To prevent damage to diaphragm, fasteners securing upper case and lower case must not be overtightened.

1 4.5.12 Using a criss-cross pattern, TORQUE upper and lower 6

diaphragm case fasteners to 18 ftalbs (15 to 20 ft lbs).

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j 4.5.13 INSTALL actuator spring.

4.5.14 INSTALL spring seat.

4.5.15 Using Nuclear Grade Never Seez, LUBRICATE actuator stem

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threads and surface of spring adjuster that contacts spring seat.

4.5.16 TIIREAD spring adjuster onto actuator stem to the position observed during disassembly and recorded on AWO.

T 4.6 Actuator Assembly - Models 70 and 87

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4.6.1 Refer To Attachment 3 or 4 as applicable, and, using Lubriplate MAG-1, LUBRICATE all 0-rings.

4.6.2 INSTALL O-ring onto top of yoke.

W 4.6.3 POSITION lower diaphragm case onto yoke.

4.6.4 INSTALL and evenly TIGHTEN capscrews securing lower diaphragm case to yoke.

4.6.5 INSTALL O-rings into seal bushing.

4.6.6 Using Nuclear Grade Never Seez, FILL seal bushing.

4.6.7 POSITION seal bushing into yoke.

4.6.8 INSTALL snap ring securing seal bushing in yoke.

4.6.9 INSTALL the following over top of actuator stem:

a.

Lower diaphragm plate b.

Diaphragm MP 715.5 Level of Use STOP THINK ACT REVIEW Rev.2 gg 18 of 41

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c.

Upper diaphragm plate

!O 4.6.10 LE actuator is not equipped with a top-mounted handjack j

assembly, PERFORM the following:

i NOTE l

The height of the spacer varies according to the valve stroke.

a.

INSTALL spacer, i

b.

INSTALL and TIGHTEN travel stop capscrew into actuator I

stem.

4 C AUTIO N ij' To pievent damage to 0-rings as the actuator stem threads pass through j

the seal bushing, caution must be used when installing the actuator stem assembly.

4 c.

Carefully INSTALL the following as an assembly, and ENSURE actuator stem threads do not damage O-rings:

i Actuator stem Diaphragm 4

Upper and lower diaphragm plates d.

INSTALL vent assembly in upper diaphragm case.

POSITION upper diaphragm case over diaphragm, and e.

ENSURE holes in diaphragm and upper and lower diaphragm cases are aligned.

f.

INSTALL, but do not tighten, fasteners securing upper diaphragm case and lower diaphragm case, f

MP 715.5 Level of Use Rev.2 STOP TPINK ACT REVIEW General 19 0f 41

.) j 4.6.11 1E actuator is equipped with a top-mounted handjack assembly, Refer To Attachment 6 and INSTALL handjack assembly as follows:

a.

INSTALL and TIGHTEN capscrews securing handjack assembly to upper diaphragm case, b.

THREAD travel stop into upper diaphragm case to the position observed during disassembly and recorded on AWO.

c.

INSTALL washer onto connector.

d.

INSTALL and TIGHTEN connector into actuator stem.

e.

INSTALL and TIGHTEN extension rod into connector.

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f.

POSITION upper diaphragm case over diaphragm, and ENSURE holes in diaphragm and upper and lower

. diaphragm cases are aligned.

l g.

INSTALL, but do not tighten, fasteners securing upper diaphragm case and lower diaphragm case.

C) h.

Using Nuclear Grade Never Seez, thoroughly LUBRICATE

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thrust bearing assembly.

i.

POSITION thrust bearing onto extension rod.

j.

POSITION bearing retainer onto extension rod.

k.

INSTALL and TIGHTEN castle nut onto extension rod.

-1.

INSTALL and SECURE groove pin.

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MP 715.5 Level of Use Rev. 2 ~

ST P THINK AT REVIEW

. General 20 of 41

C AUTIO N To prevent damage to diaphragm, fasteners securing upper case and lower case must not be overtightened.

l 4.6.12 Refer To Attachment 3 or 4 as applicable, and, using a j

criss-cross pattern, TORQUE fasteners securing upper and lower diaphragm case and nuts to 18 ftelbs (15 to 20 ft lbs).

4.6.13 INSTALL actuator spring.

4.6.14 INSTALL spring seat.

4.6.15 Using Nuclear Grade Never Seez, LUBRICATE actuator stem threads and surface of spring adjuster that contacts spring seat.

i 4.6.16 TIIREAD spring adjuster onto actuator stem to the position observed during disassembly and recorded on AWO.

4.7 Actuator Installation 4.7.1 PERFORM actuator bench set adjustment as follows:

a.

CONNECT temporary regulated air supply to actuator.

pG MP 715.5 Level of Use STOP THINK

'ACT REVIEW Rev.2 General 21 of 41

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NOTE i

The " BENCH SET" range is the pressure range required to stroke the valve fully without any resistance caused by the packiing in the bonnet or pressure in the valve. The " BENCH SET range is stamped on the actuator nameplate.

b.

Refer to the actuator nameplate and DETERMINE actuator bench set range.

f i

c.

Refer to Attachment 1, and DETERMINE " Maximum Diaphragm Casing Pressure and " Maximum Diaphragm Pressure to Stroke Actuator" values.

i STOP WARNING STOP i

To prevent injury to personnel and damage to equipment, the " Maximum Diaphragm Casing Pressure" and " Maximum Diaphragm Pressure to Stroke Actuator" must not be exceeded.

d.

PRESSURIZE actuator to lower pressure value of actuator

,'v bench set range, and ENSURE " Maximum Diaphragm Casing Pressure" and " Maximum Diaphragm Pressure to Stroke Actuator" values are not exceeded.

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a MP 715.5 d

Level of Use STOP THINK ACT REVIEW Rev. 2 gg 22 0f 41

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sors Erning the spring adjuster towards the stem connector decreases spring l

tension and causes actuator stem travel to begin at a lower air pressure l

value.

i Turning the spring adjuster awayfrom the stem connector increases spring tension and causes actuator stem travel to begin at a higher air pressure value.

e.

ADJUST spring adjuster until actuator motion starts at approximately lower pressure value of actuator bench set range.

f.

OBSERVE the pressure at which actuator stem travel begins, and RECORD value onto AWO as "Actuallower bench set 1

pressure."

l g.

PRESSURIZE actuator to upper pressure value of actuator bench set range, and ENSURE " Maximum Diaphragm Casing Pressure" and " Maximum Diaphragm Pressure to Stroke Actuator" values are not exceeded.

h.

ADJUST spring adjuster until actuator reaches full stroke at approximately upper pres.sure value of actuator bench set range.

i.

OBSERVE the pressure at which the actuator reaches full stroke, and RECORD value onto AWO as " Actual upper bench set pressure."

j.

DEPRESSURIZE and VENT actuator.

k.

DISCONNECT temporary regulated air supply from actuator.

l O

MP 715.5 Level of Use STOP THINK ACT REVIEW Rev.2 ggggg 23 of 41

C AUTIO N Turning the valve stem when it is in contact with the valve seat can damage the valve seating surfaces. When threading jam nuts onto valve stem, caution must be used to prevent valve stem from turning.

1 4.7.2 THREAD one jam nut onto valve stem, and ENSURE valve stem does not turn.

NOTE On actuator sizes 45 and 70, only one jam nut is required.

4.7.3 IE actuator is a size 30, THREAD a second jam nut onto valve j

stem, and ENSURE valve stem does not turn.

4.7.4 PUSH valve stem downward.

4.7.5 IE travel indicator is a disc-type indicator, POSITION travel indicator onto valve stem, and ENSURE concave side of travel indicator is facing downward.

4.7.6 CONNECT a temporary regulated air supply to actuator.

4.7.7 Refer To Attachment 1, and DETERMINE " Maximum Diaphragm Casing Pressure" and " Maximum Diaphragm Pressure to Stroke Actuator" values, l

STOP WARNING STOP To prevent injury to personnel and damage to equipment, the " Maximum Dia hragm Casing Pressure" and " Maximum Diaphragm Pressure to Str e Actuator" must not be exceeded.

4.7.8 PRESSURIZE actuator until actuator stem moves to mid-position, and ENSURE " Maximum Diaphragm Casing Pressure" and " Maximum Diaphragm Pressure to Stroke Actuator" values are not exceeded.

4.7.9 DEPRESSURIZE and VENT actuator.

MP 715.5 Level of USe STOP THINK ACT REVIEW Rev.2 bened 24 of 41

~.

i a

i I

i 4.7.10 DISCONNECT temporaq regulated air supply from actuator.

4.7.11 E necessary, RIG and SUPPORTweight of actuator.

4.7.12 POSITION actuator onto valve bonnet.

NOTE j.

Size 30 through 70 actuators are secured to the valve bonnet by a locknut.

Size 87 actuators are secured to the valve bonnet by capscrews and nuts.

l l

l 4.7.13 INSTALL and TIGHTEN fastener (s) securing actuator to valve.

l 4.7.14 IE applicable, INSTALL actuator support brackets.

C AUTIO N Some actuators are calibrated at the factory, and must not be adjusted.

4.7.15 If applicable, INSTALL or CONNECT limit switches.

l 4.7.16 IE limit switches were connected, RECORD landed leads onto WC 10 (Att)," Lifted Lead and Jumper Device Data Sheet."

4.7.17 IE applicable, REQUEST I&C Department to INSTALL the i

following:

Positioner Transmitter Transducer 1 01

O MP 715.5 Level of Use STOP TH!NK ACT REVIEW Rev.2 i

Genera l

. 25 of 41

4 x

4.8 Actuator Stroke Adjustment NOTE The method of connecting the actuator stem to the valve stem depends on the operation of the valve.

Step 4.8.1 describes how to connect the actuator and valve stems on push-down-to-close valves.

Step 4.8.2 describes how to connect the actuator and valve stems on push-down-to-open valves.

4.8.1 IE valve is a push-down-to-close valve, CONNECT actuator and valve stems as follows:

STOP WARNING STOP

/

To prevent injury to personnel and damage to equipment, the " Maximum Diaphragm Casing Pressure" and " Maximum Diaphragm Pressure to Stroke Actuator" must not be exceeded.

p CONNECT regulated air supply to actuator, a.

b.

PRESSURIZE actuator until actuator stem moves to the full-upward position, and ENSURE " Maximum Diaphragm Casing Pressure" and " Maximum Diaphragm Pressure to Stroke Actuator" values are not exceeded.

c.

PUSH valve stem downward until valve is seated.

d.

REDUCE air supply pressure until actuator stem moves down the distance required for valve stem travel.

.)

MP 715.5 Level of Use Genera STOP THE ACT REVIEW Rev.2 26 of 41

(

C AUTIO N 1.

To prevent scoring or damagi,ng valve stem, tools must not be used directly on the valve stem. Mmor defects on valve stem can cause leakage through valve packing.

2.

To prevent stripped threads or improper valve operation, the valve and actuator stem threads must be adequately engaged in the stem connector. The stem connector must engage more than just the tip of the valve or actuator stem. The length of each stem clamped in the stem connector must be equalto orgreaterthan the diameter of the stem.

c.

POSITION stem connector halves over actuator and valve stem threads, and ENSURE stem connector adequately engages actuator and valve stem threads.

f.

INSTALL, but do not tighten, capscrews securing stem connector halves.

g.

PRESSURIZE actuator untif xtuator stem moves to the full-upward position, and ENSURE " Maximum Diaphragm Casing Pressure" and " Maximum Diaphragm Pressure to gN Stroke Actuator" values are not exceeded.

eq) i C A UTIO N To prevent scoring or damaging valve seating surfaces, valve stem must not be turned when valve is seated.

1 NOTE Turning the valve stem counterclockwise one full turn establishes the preload pressure necessary for proper stem-to-seat contact.

h.

TURN valve stem counterclockwise one full turn.

i.

TIGHTEN capscrews securing stem connector halves.

j.

DEPRESSURIZE and vent actuator ID V

MP 715.5 Level of Use ST P THINK ACT REVIEW Rev.2 Gened 27 of 41

f

.r

,-t NOTE On some valves, the travel indicator is not installed.

The travel indicator may be a disc-type indicator installed between the stem connector and stem locknuts or a pointer fastened to the side of the stem connector, k.

E travel indicator is a disc-type indicator, PERFORM the following:

i

1) POSITION travel indicator against bottom of stem connector and TIGHTEN jam nut (s) against travel l

indicator.

2) E travel indicator does not indicate that the valve is closed when the actuator is depressurized, ADJUST position of travel indicator scale until travel indicator indicates that the valve is closed.

/]

1.

E travel indicator is a pointer-type indicator attached to V

stem connector, PERFORM the following:

1) TIGHTEN jam nut (s) against stem connector.

2) E travel indicator does not indicate that the valve is closed when the actuator is depressurized, ADJUST

~

position of travel indicator scale to indicate that the valve is closed.

O MP 715.5 Level of Use STOP THINK ACT REVIEW Rev.2 General 28 of 41

l

/^g 4.8.2 LE valve is a push-down-to-open valve, CONNECT actuator V

and valve stems as follows:

STOP WARNING STOP

/

To prevent injury to persormel and damage to equipment, the " Maximum i

Diaphragm Casmg Pressure" and " Maximum Diaphragm Pressure to i

Stroke Actuator" must not be exceeded.

a.

PRESSURIZE actuator until actuator stem moves to the

}

full-upward position, and ENSURE " Maximum Diaphragm Casing Pressure" and " Maximum Diaphragm Pressure to Stroke Actuator" values are not exceeded.

4 i

b.

PULL valve stem upward until valve is seated.

i NOTE 1 i Connecting the actuator and valve stems when the actuator stem is /8 nch down from the full-upward position establishes the preload pressure necessary for proper stem-to-seat contact.

c.

REDUCE air supply pressure until actuator stem moves 1 i downward approximately /8 nch.

C AUTIO N 1.

To prevent scoring or damaging valve stem, tools must not be used directly on the valve stem. Minor defects on valve stem can cause leakage through valve packing.

2.

To prevent stripped threads or improper valve operation, the valve and actuator stem threads must be adequately engaged in the stem connector. The stem connector must engage more than just the tip of the valve or actuator stem. The length of each stem clamped in the stem connector must be equalto orgreater than the diameter of the stem.

d.

POSITION stem connector halves over actuator and valve stem threads, and ENSURE stem connector adequately engages actuator and valve stem threads.

O MP 715.5 Level of Use STOP THINK '

ACT REVIEW Rev.2 gg g 29 of 41

- e.

INSTALL and TIGHTEN capscrews securing stem connector i

halves.

NOTE 1.

On some valves, the travel indicator is not installed.

2.

The travel indicator may be a disc-type indicator installed between the stem connector and stem locknuts or a pointer fastened to the side 4

of the stem connector.

4 f.

LE travel indicator is a disc-type indicator, PERFORM the following

1) POSITION travel indicator against bottom of stem connector and TIGHTEN jam nut (s) against travel indicator.

2) IE travel indicator does not indicate that the valve is open when the actuator is depressurized, ADJUST position of travel indicator scale to indicate that the valve is open.

3 g.

1E travel indicator is a pointer-type indicator attached to stem connector, PERFORM the following:

x

1) TIGHTENjam nut (s) against stem connector.

2) IE travel indicator does not indicate that the valve is open when the actuator is depressurized, ADJUST position of travel indicator scale until travel indicator indicates that the valve is open.

4.8.3 Refer To Attachment 1, and DETERMINE actuator stem travel dimension.

4.8.4 CYCLE air pressure to actuator, and OBSERVE actuator stem travel.

i O

MP 715.5 Level of Use STOP THINK ACT REVIEW Rev.2 General 30 of 41

-m 4.8.5 IE valve does not seat as required, ADJUST position of valve

)

stem as follows:

LOOSEN, but do not remove, capscrews securing stem 1

a.

connector halves.

b.

LOOSEN, but do not remove, jam nut (s).

c.

TIGHTEN jam nut (s) together.

C A UTIO N 1.

To prevent scoring or damaging valve stem, caution must be used when i

adjusting position of salve stem. Minor defects on valve stem can cause leakage through valve packing.

2.

To prevent scoring or damaging valve seating surfaces, valve stem must not be turned when valve is seated.

d.

Using a wrench, HOLD jam nut (s), and SCREW valve stem into or out of stem connector as required.

'O e.

TIGHTEN capscrews securing stem connector halves.

wi f.

TIGHTEN jam nut (s) against stem connector.

3 g.

REPEAT steps 4.8.4 and 4.8.5 as required to ensure proper valve stem travel.

4.8.6 DISCONNECT temporary regulated air supply from actuator.

4.8.7 CONNECT facility instrument air supply to actuator.

l 4.9 Operational Checkout NOTE When the valve, actuator, any accessories are installed, the assembly must be checked for correct travel, freedom from friction, and correct action to match the controlling instrument. The actuator stem and valve stem must move freely in response to the loading pressure change on the diaphragm.

4.9.1 COORDINKTE actuator operational checkout with Operations G

Department and I&C Department.

'N)

MP 715.5 Level of Use STOP THINK ACT REVIEW Rev.2 benOml 31 of 41

b NOTE D

The "DIAPH PRES" range is the standard diaphragm pressure range. This value indicates the pressure range within which the valve should stroke when the valve is pressurized and the packing is tightened to stop leaks around the stem. The "DIAPH PRES" range is stamped on the actuator nameplate.

4.9.2 Refer To actuator nameplate and DETERMINE diaphragm pressure range.

4.9.3 Refer to Attachment 1, and DETERMINE " Maximum Diaphragm Casing Pressure and " Maximum Diaphragm Pressure to Stroke Actuator" values.

4.9.4 WHEN system conditions permit, REQUEST Operations Department to cycle valve actuator several times, and OBSERVE actuator operation.

4.9.5 ADJUST valve packing and ENSURE there are no leaks around 1

ste m.

(O t )

STOP WARNING STOP To prevent injury to personnel and damage to equipment, the " Maximum Diaphragm Casmg Pressure" and " Maximum Diaphragm Pressure to Stroke Actuator" must not be exceeded.

4.9.6 PRESSURIZE actuator to lower pressure value of diaphragm pressure range, and ENSURE " Maximum Diaphragm Casing Pressure" and " Maximum Diaphragm Pressure to Stroke Actuator" values are not exceeded.

4 h

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MP 715.5 Level of USe STOP THINK ACT REVIEW Rev.2 gg 32 of 41

O sort Turning the spring adjuster towards the stem connector decreases spring tension and causes actuator stem travel to begin at a lower air pressure value.

Tbrning the spring adjuster awayfrom the stem connector increases spring tension and causes actuator stem travel to begin at a higher air pressure value.

4.9.7 ADJUST spring adjuster until actuator motion starts at approximately lower pressure value of diaphragm pressure range.

4.9.8 OBSERVE the pressure at which actuator stem travel begins, and RECORD value onto AWO as " Actual lower diaphragm pressure."

4.9.9 PRESSURIZE actuator to upper pressure value of diaphragm pressure range, and ENSURE " Maximum Diaphragm Casing Pressure" and " Maximum Diaphragm Pressure to Stroke Actuator" values are not exceeded.

4.9.10 ADJUST spring adjuster until actuator reaches full stroke at

(

approximately upper pressure value of diaphragm pressure range.

4.9.11 OBSERVE the pressure at which actuator reaches full stroke, and RECORD value onto AWO as " Actual upper diaphragm pressure."

4.9.12 E applicable, ADJUST limit switches.

4.9.13 E applicable, REQUEST I&C Department to ADJUST the following:

Positioner Transmitter Transducer Handjack assembly l

l l

4.9.14 Refer To steps 4.9.4 through 4.9.13 until actuator operation is satisfactory.

iO MP 715.5 Level of Use ST P THINK ACT REVIEW Rev.2 General 1

33 of 41

l I

5. REVIEW AND SIGN-OFF

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l

)

t s

l 5.1 The review and sign-off for this procedure is satisfied by the review and signoff of the AWO.

)

6. REFERENCES 1

6.1 NNECo Accident Prevention Manual 6.2 Vendor Manuals I

6.2.1 25202-266-001B, " Fisher Controls" Fisher Controls,"Wpe 667 Diaphragm Actuators, Sized 30, 34,40,45,50,60,70, and 87" Form 1203C Fisher Controls, " Instruction Manual, Dpe 667 Diaphragm Actuators, Sized 30-70 and 87" Form 1203 6.2.2 Fisher Controls, "657 and 667 Diaphragm Actuators" Bulletin 61.1:657 1

6.2.3 Fisher Controls, " Control Valves for the CPI" Bulletin 51.010 (3

U 6.2.4 Fisher Controls, " Catalog 122 Parts Kits" 6.3 Administrative Procedures 6.3.1 CC 1," Control of Chemical Consumable Products" 6.3.2 WC 3,"ASME Section XI Repair and Replacement Program" 6.3.3 WC 8," Control and Calibration of Measuring and Test Equipment" 6.3.4 WC 10," Jumper, Lifted Lead, and Bypass Control" 6.4 Other Documents 3

6.4.1 New England Controls Telecon regarding equivalent lubricants, Scott Hayden and Jim Ardus dated 7/10/96 O

MP 715.5 Level of Use Rev.2 STOP THINK ACT REVIEW

'bened 34 of 41

8 i

p

7.

SUMMARY

OF CHANGES 7.1 Modified procedure to incorporate recording of bench set and diaphragm i

j pressure test values on the AWO per AR 96029946.

I 7.2 Incorporated minor editorial and reference changes as a result of a Biennial Review.

3 i

i 1

I O

.,v O

MP 715.5 Level of Use

' REVIEW Rev.2 ST P' THINK ACT' Genemi 35 of 41

Actuator Specifications 1

(Sheet 1 of 1)

i /

lu Actuator Size E'

30 34 40 45 46 50 60 70 87 Maximum Diaphragm Pressure To 40 45 45 50 45 50 45 40 40 Stroke Actuator (psig)

Maximum Excess Diaphragm 70 45 45 30 15 30 15 15 15 1

Pressure (psig)

Maximum Diaphragm Casing 110 90 90 65 55 65 55 55 55 Pressure (psig)

Maximum Travel (in.) - Standard 3/4 3/4 1%

2 2

2 2

3 3

Maximum Travel (in.) - Top-Loaded NA 3/4 NA 3

1

/4 NA NA 1/8 NA 3

i I

k i A G

4 i

i i

i i

n MP 715.5 Level of Use STOP THINK ACT REVIEW Rev.2 General 36 or 41

Fisher bpe-667 Actuator, Sizes 30 Through 60 (Sheet 1 of 1)

O (j

Vent Assembly Upper Diaphragm TravelStop Case m.

Spacer Capscrew s s x x x x xw xxxxx Upper Diaphragm

}

W Diaphragm Lower Diaphragm

[

Down Stop Q

s s

Gasket kN Snap Ring i

N s

Lower Diaphragm

(

0_ Ring Plate N

0-Ring Yoke Seal Bushing

[~

1 s

Actuator Stem

!N Actuator Spring 4

g

~

k k

Spring Seat

=

Spring Adjuster g

4 Travellndicator p

[g Stem Connector

~

j TraveIIndicator

- r-'N s

z N

Jam Nuts 3

(k MP 715.5 Level of Use STOP THINK ACT REVIEV/

gey, 2 General 37 or 41

Fisher Type-667 Actuator, Size 70

']

(Sheet 1 of 1) b Vent Assembly Upper Diaphragm Pipe Bushing s

G Travel Stop Capserew Spacer l

x Upper Diaphra g Capscrew y

M \\\\

//A>A

/

'N Nut i

.w/g n

n Diap.ragm w

. Lower Diaphragm 4

s Case A

4 Snap Ring fj 7

l N.

-"*8 Lc,ver Diaphragm s

Plate p

0-Ring h

O - Ring Seal B.3hing Nameplate

' f3 l.

/

/

_f Drive Screw q

w-A

d Actuator Spring y

/w

/1 Actuator Stem J

Spring Seat clindIator

$t-k)O l

T

"':72 leds S,

Washer Stem Connector Jam Nuts TravelIndicator

(']s L

t MP 715.5 Level of Use STOP THINK ACT REVIEW Rev.2 beneral yg

Fisher Type-667 Actuator, Size 87 I

(Sheet 1 of 1)

Vent Assembly Upper Diaphragm Pipe Bushin8 Case Spacer s s s -

y Travel Stop Upper Diaphragrn x

Capscrew Plate 1

\\

Ak^\\\\

.6

//AJA

/l Diaphragm m f/Af\\\\ 'm

/

Lower Diaphragm p Ring 0-Ring s

Lower Diaphra m[

Yoke 0-Ring l

.g 0-Ring s

g s

s Seal Bushing 2

7

[%

Actuator Spring hhk

' Actuator Stem p

Spring Scat Spring Adjuster 7y a

TravelIndicator -

' p-g Scale Screw -

r;

~

1. d**"

Stem Connector

\\

)

\\

/j Jam Nuts i

TravelIndicator 77 A

V r~

L].

MP 715.5 Level of Use STOP THINK ACT REVIEW Rev.2 beneral 39 of 41

Top-Mounted Handjack Assembly for Size 30 Through 60 Actuators i

ys, (Sheet 1 of 1) 1

(/

i Castle Nut g;

Groove Pin

{

Retaining Ring Washer 8

\\h Handwheel IIandwheel

(

(

Screw

\\

N Locknut N

N 1

\\

N/

llandwheel Body

\\

N N

N

[TTl

/

Vent Assembly s s, ss s Mounting Plate n

(

O

/5/

Travel Stop

/3!!E/

Extension Rod

'N Connector M

PD N

s I

.(%

'\\

Level of Use STOP THINK ACT REVIEW g y, General 40 of 41

Top-Mounted Handjack Assembly for Size 70 and 87 Actuators

[

(Sheet 1 of 1)

Castle Nut

. =

Groove Pin Bearing Retainer -

NY TL

- Thrust Bearing Thrust Race h

hh__

~ Handwheel Handwheel Screw Retairung Ring s

Locknut Pipe Nippla llandwheel Body b

3

{'

V y ent Assembly t

v/

x (v)

Lockwasher/E9V

==

1

%N

/

"=

N l

Guide Plate Machine Screw Capscrew Travel Stop Washer Extension Rod web 7

Connector 2

r"'

2 i

"\\

jb l

Level of Use STOP THINK ACT REVIEW 9

General 1

41 of 41