ML19207A288
| ML19207A288 | |
| Person / Time | |
|---|---|
| Issue date: | 07/03/1979 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19207A285 | List: |
| References | |
| NUDOCS 7908140747 | |
| Download: ML19207A288 (1) | |
Text
3 TOPICAL REPORT EVALUATION 7979 Recort Number and
Title:
SSCO Topical Report SSCO-15215 (NP)
" Containment Spray Nozzles for Nuclear Power Plants" Originating Organization:
Spraying Systems Company The topical report describes the design and testing of Soraying Systems Company's Whirljet spray nozzle for use in the containment spray systems of light water nuclear power plants.
The scope of the topical report is limited to the evalu-ation of flow rate, spray coverage and the total spray particle distribution.
Spraying Systems Comoany conducted tests and perforrred an evaluation of its Whirljet spray nozzle. The tests determined the spatial drop distribution and spray capability of the spray nozzle as a function of pressure.
Based on our review, we conclude that the testing and data evaluation were per-forr.ed in an acceptable manner. Therefore, Spraying Systems Company's topical report is acceptable for referencing in nuclear power plant license applications.
However, we will require applicants referencing this topical report to relate the spatial drop distribution produced by the spray nozzles to the heat and radio-iodine removal capability of their particular spray system.
We will review this on a case by case basis.
Another aspect of the Whirljet spray nozzle that we will require to be considered 9
on a case by case basis is the potential for clogging of the nozzle by debris in the containment spray system sump.
Each applicant that references Topical Report SSCO-15215 (NP) ust provide information to demonstrate that the size of the openings in the sump screens are small enough to preclude clogging of the spray nozzle.
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TOPICAL REPORT NO. SSCO 15215-1C-304SS 6.3NP-A CONTAlflMENT SPRAY N0ZZLES FOR NUCLEAR POWER PLANTS April 1977
.o 137
TABLE OF CONTENTS Section Title Pace Abstract Containment Spray Nozzles for Nuclear Power Plants i
I Nozzle Description 1
II Nozzle Performance 1
III Testing Procedure 1
IV Data Evaluation 2
V Standardization and Accuracy 4
VI Description of Spray Analyzer a
Illustration Title Page Drawing No. 15424 15215-1C-304SS 6.3 Whirljet 6
Drawing No. 11833-1 Spray Analyzer 7
Drawing No. 15500 Spray Pattern Distribution Apparatus 8
Figure A Spatial Drop Size Distribution 9
Figure B Particle Size vs. Accumulated Percentage 10 Figure C Computer output sheet " Collected Composite" (Spatial Distribution) 11 Figure D Normalized Tempora'l Number Distribution 12 Figure E Computer output sheet " Collected Composite" (Temporal Distribution) 13 Figure 1 Particle Size vs. Pressure la Figure 2 Spray Nozzle Capacity vs. Pressure 15 Figure 3 Spray Angle vs. Height 16 Figure 4 Spray Coverage vs. Height (0 )
17 Figure 5 Spray Coverage vs. Height (7-1/2 )
18 Figure 6 Spray Coverage vs. Height (15 )
19 Figure 7 Spray Coverage vs. Height (30 )
20 Figure 8 Spray Coverage vs. Height (40 )
21 Figure 9 Spray Coverage vs. Height (60 )
22 Figure 10 Spray Coverage vs. Height (90 )
23 Figure 11 Spray Coverage vs. Height (Up 30 )
24 Figure 12 Percent of Liquid in the Spray Annulus 25 O
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ABSTRACT CONTAINfENT SPRAY N0ZZLES FOR NUCLEAR POWER PLANT SYSTEMS The purpose of this report is to show the design of the SSCO-15215-lC-304SS 6.3 Whirljet nozzle and to show the extent of the detailed testing and data evaluation of the spray performance at the design pressure of 40 psi in order to qualify for NRC acceptance.
The scope of the report is limited to the systematic evaluation of flow rate, spray coverage and the total spray particle evaluation (including explanation of calculations) at the design pressure of 40 psi. Also included in the report is the description of the Spraying Systems Co. Electronic Spray Analyzer and charts and graphs showing the results of the measurements and evaluations.
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N0ZZLE DESCRIe> TION The 15215-lC 6.3 Whirljet is a high quality investment casting no 1 inch female NPT connection constructed of type 304 available i Stainless Steel. There are no internal vanes or obstructions for clog-free performance. The free passage diameter of the nczzle is 7/16 inch as shown in Drawing No. 15424 II.
PERFORMANCE The 15215-lC 6.3 Whirljet is designed to spray 15.2 Gallons per Min.
at an operating pressure of 40 psi.
Flow rates at other operating pressures can be determined frcm Fig. No.1.
Effective spray angles at height. "o to 10 7eet can be approximated from Fig. 2 by placing a straight edge from the nozzle to the edge of the effective spray diameter and read directly from the angle indicator. Approximate spray coverages for heights greater than 10 feet for nozzles mounted at various angles can be seen on Figs. 3 through 10.
III. TESTING PROCEDURE Liquid distribution across the spray annubs was obtained by actual measurement of liquid collected in tubes positioned on 2 inch centers intersecting the spray pattern in two perpendicular planes as illustrated in Drawing No. 15500. A typical resultant liquid distribution pattern can be seen in Fig. No.11.
Spray particle size measurements were made in the following manner:
The spray nozzle was mounted at a 10 foot height above the SSCO Electronic Spray Analyzer. The spray was then directed downward through a slot in the protective housing over the TV camera anc into the camera's field of view, as shown in Drawing No. 11833-1. The particle measurements were begun at the outer edge of the spray cone and throLgh the cross section of the spray at 4 inch increments.
This procedure resulted in detailed spatial spray analysis through the spray cone with each test increment referenced to the actual liquid volume contained within the
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test increment.
Seventeen separate particle size tests were run with a composite count of over 23,000 drops. The result of each particle test was then weighed against the volume of liquid collected within each test increment. The results of these tests were then accumulated to form a single composite histogram (Fig. A) to represent the total particle size spectrum of the spray and to generate the accumulated percentage curves (Fig. C).
IV.
DATA EVALUATION The raw data is shown on the computer output sheet called " COLLECTED COMPOSITE" (Fig. C).
The first set of columns is the composite raw data and the cumulative drop count.
The second set of columns is the inter-polated data for generating the histogram (. %. A.).
The cumulative count as an inverse function of the upper bound diameters was obtained using overlapping cubic equations of the form: D=AF3+
BF2+CFI + E, where D is the upper bound dic'ter and F is the cumulative drop count of drops of diameter less than D.
Using upper bound diameters of histogram intervals the corresponding cumulative drop counts were obtained by solving the appropriate cubic equation.
The cubic equations were obtained in succession by starting with an exactly fitted cubic on the first four points. This cubic was used for the histogram points falling in the first two composite data intervals.
Each cubic equation after the first was obtained by dropping the first point of the previous fit and adding the next point.
From this next set of four points, the desired cubic equation was formed by requiring it to lie on the second and third point, requiring the slope at the second point to coincide with that of the previous cubic, and requiring that the first and fourth points to be a least squares fit.
Each cubic equation except the first and last were used to evaluate only those histogram points lying between the second and third composite data points (of the four determing the cubic). The last cubic determinable in this manner was
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used to evaluate the histogram poir.ts lying in the last two composite raw data intervals.
(It was necessary to shift the origins on the cubic functions to keep significant numbers in the computer.)
Note: The total count in the histogram does not agree with the accumulated count in the composite data due to the fact that the histogram count started at 37.5 microns in order that the intervals for count be main-tained at 25 microns.
An additional reduction of data was made be correcting the special distributien obtained from sampling with the analyzer using settli g n
velocities and annular spray cone areas for the corrections, Figs. D and E.
The following equations were used to obtain this second composite data reduction:
Di
= diameter of upper bound in the ith class.
Vg
= settling velocity of the middle diameter drop in the i th class.
Nj,f = number of drops in the i '1 class in sample at j th position.
Ng
= the desired nomalized temporal distribution by number count in the ith class using the settling velocities and cone areas.
K
= normalizing constant to produce drop numbers of practical magnitude for handling data.
Rf
= radius from the spray cone axis to the sampling position divided by the radius of the cylinder of volume sampling graduate except for center position.
Rj
= 1,/4 for the center position.
Vi
= volume flow rate at the f th position.
N = KV; N4 V5 Rj J
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STANDARDIZATION & ACCURACY The electronic measuring instrument is calibrated using " drops" (accurately etched in slides) by adjusting it to measure these " drops" in the correct size classes.
Due to size of sample, approximately 4000 counts or greater at each sampling location, the statistical error is of 1
an order smaller than y or better than two percent for the various averages. The sampling technique may lead to another two percent. The calibration with the statistics has probable error smaller than three percent. The overall probable error in averages on measuring and computation for a single nozzle is within 5%. Hence, reliability of the calculated values is within a maximum of 10% for averages.
VI.
DESCRIPTION OF SPRAYING SYSTEMS C0. ELECTRONIC SPRAY ANALYZER Basically, spray droplet measurement is done within the spray's natural environment without the use of any collection medium which may interfere with the effective collection of particle size data. This is accomplished with the use of a TV camera, a TV monitor, a strobe light and a computer console. The Analyzer counts and measures the particle as follows:
1.
A nozzle spray is positioned between the strobe 'ight and the TV camera.
2.
As the stroboscope flashes, the television camera receives the spray drop images whose motion is stopped by the rapid strobe light source.
3.
The image that is now on the vidicon tube is scanned in the television camera and the electrical impulses formed by these images is transmitted to the electronic counting and measuring circuits housed in the console.
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The console as it receives these impulses analyzes as follows:
A.
It determines whether a drop is in focus, if out of focus, it is rejected and not counted. tg}
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B.
Every drop in focus has its diameter determined by the number of TV scan lines that pass through the drop image.
C.
The spray particle is counted by being recorded on one of the nine counters on the right side of the console.
Each one of these counters represents a particular particle size range (20-25 microns, 25-30 microns, etc., all the way up to 20,000 microns) in steps of four magnification ranges.
5.
Once the image on the television screen has been scanned and all of the spray particles in the image have been analyzed, measured and counted by the electronic ci cuits, the image is erased and the strube light flashes once more to put a new image on the television tube. The time element between light flashes, for all this to occur is e-tramely short.
Some additional features of ti., Spray Analyzer are:
1.
A TV monitor or television screen showing a picture of a droplet or image being picked up on the vidicon tube. This is used in locating the section of spray to be analyzed and in cal 15 ration of the eruiipment.
2.
Different optics for the television camera allow for different magnifications of the spray droplets and make it possible to measure droplets across a wide range of sizes.
3.
A built-in recorder which will print out the particle size count as shown on the counters. This provides a permanent record of the data obtained.
4.
There is a built-in time and stop control.
Each counter will handle a count up to 900 particles. The stop count control will turn all counters off when any of the chan els has reached a full count. c [,
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April 20,1977 PARTICII SI:I VS. PPISSUPI for the 15:15-1C-30455 6.3 W.IRUET NC 212 spraying water at rocm temperature. (3ased cm at=ospheric conditio. .t 793 Ft. above sea level.)
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April 20, 1977 APPPCXLMIT SPRAY COVEPAGE VS. HZICHT WHIL.ZT NC::'Z spraying vatar at 40 psi tar the 15215-10-304536.3 T at room temperatu.re under laboratory cor.ditions. (Based on atmospheric conditions at 733 Ft. above sea level.) ~ 15' -s- ~~ u + + ---a 4--_..-. ~ Q
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20 I 16 3- .x --.y. g --1 w t_ _ =- - .____..m 4 = .= + y __ - -_ ;3 s - + 50 g -. - + ~-' _7 ~~Z 60 TC g_ g - 70 a0 - - - - ~ ~ _ _ ~ .=-+- ~ ~ " 90 ~ ~ ~ ~ ' - 100 -~~- -~~T_Z ~ _.. - ~ _ - wa,,a r n 5 E ~ ^ 4': .-- _ m._ _ _. ?A% +- +U ~-1* k JC,, p : --~ . - = - H ._._.J _. _ - _gy# g*a,4 4 h _ ~,5d' L, M gn . + _... _. - - t 0 5 10 15 20 25 - ~. = = - - -. - - -. _ _ SPDAY COVERAGE IN FEET t. _ ~...... --_____.___.Q_.msm + .:=_---_-q ma This spray pattern was determined by actual measureunts down to a distance of 20' below the nozzle. At this point most of the spray particles have assu:ned a vertical trajectory establishing a pattern within reasorable proximity to the indicated pattern. SPRAYING SYSTEMS CO. .jn- . U, nO FIG. 6 h. b g
April 20, 1977 APPPOXIyATE SPFAY COV! PEE VS. HEIGIT for the 15215-10-30453 6.3 WH 2.L.;IT Nc=*LE spraying water at 40 psi at roca temperature under :.aboratory conditions. (Based on atzspheric conditics.s at 733 Ft. above sea level.) ..~ + -. _ _. _ _. - - .._--._g___ ..__.-_t1.___ ___1_._--. 6__ ._.__.. _ \\ r__.__.r__._._ g_-__ ~ ~ _ ~ ~. ~ ~~"-~~'~ ~~_*-"--^ ~ ~ ~ ~ - ~ ~ ~ ~ ~ - _ _... ~ 0 . s _. _\\ s 10 ~ ~ ~ ~ ~ QG2 _ ~~ _ __7_ _ _ 3 _t 20 ___m m._,__.______,__ - _._ r 30* ~ D~
- - ~ ~ -
ZT. -~ ~Z 30 ^ ~ - t --~- ~_T_ ~~~^ ~ 7 G.g 40 T-~,--._ '-~~ ~--- ~~'i-C.Z 'C~_^--~~~ ~-~ Z "--- E g 3 __ w _50 ._Z_~__ !~ _. ___m - ~ ~ -. - ^~ __ __._ j 70 ~_ --+-- 3 _._ _ _r-r= 80 - ~ - ' _ - _ - _ -.n_ - ;;_--_---- -----~_Z-
- _.
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. _ - ~ . _ _ _. 90 ---~ ~ *~ v ~~~ i 7? 100 _.---^:__----( - - - ^ ~ ~ -=-=' gin &;As t==t__ _ __ ___ _. -. - - E
- w___-__..___,..._.__
Q 2- __ _.. _. - _ _ _. - - - _ %-- t= =r _ _ _L.. _ - -- - '.; & RN ?-- -r _.... _ - ___~~ ~ ~
- =
F_= y zyg.- _ _..._- -- r _.t-a__._._._ . r =.- r ru. _._. _ _ _ - _ _-- ;;rumq . _ _ _ _ _ _ _ _. _. _ _. _ I_ J, 5 10 15 20 25 .----_u._. 2_____._.____.______..___.,. 4 'T_._._._E ~~ SPRAY COVERAGE IN FEET ~f_: : :-9~.i~~-- r __ ~ -.._..__....___...__t __t-_.._.. . r- .r- - - crz: mis spray pautarn was determined by actual measurements down to a distance of 20' below the nozzle. At this point most of the spray particles have assumed a vertical traWtory establishiaq a pattern within reasonable proximity to the indicated pattern. ,g s e SPRAYING SYSTEMS CO. FIG. 7 h h a L O d u su ls'i n s L April 20, 1977 APPRCXI.%TE SPRM CCVERACE VS. HEI2T for the 13215-LC-304ss6.3 witIa!:IT Nc ::.E spraying water at 40 psi at room temperature under laboratory conditions. (Based an atmospheric conditio s at 793 Ft. above sea level.) --,--'-*r p-40' ,N - - _ =._ _ _. _ y _. +.. _______0
- 4..
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"d:E 60 ---' - Z w zr-- 70 --- _4 _. E.-.. 90h ~~ 100 h_ M' __~. T- ______,__.___=_:- +w -"-~~._ 5 ,..w .?qmi{ "..
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w { tg g sr 9."@% .. cu _ e,.r... _ _ _ .._ _ a - _ + - -., p= _- m 1.saE=; crw JF :.___ _. 0 5-lo 15 .'O _n 29 35 i ~~ SPRAY CCVER5?2 IN TEET = = - - ___m 7_- NC7tE s This spray pattern was determined by actual measurements down *a a distance of 20' below the nozzle. At this point :est af the spray particles have assu:ned a vertical trajectory establishing a pattern within reasonable proximity to the indicated pattern. s; ' SPRAYING SYSTEMS CO. FIG. 8 W Y O O I $ ) E Y $ l[!l'0 .a tbth UnddhhL
April 20, 1977 APPRCXDET SPRAY OF.ATFAGE VS. KEIQfr for the 13:15-lC-304SS6.3 WHIRLIET NC7.ZI E spraying water at 40 psi at room tamperature under laboratory conditions. (Based on atmosphatic conditions at 73 3 f t. above sea level.) 74 - _.. - -. - - +... - - _ - - _.... - -. -.... 2._. __--.-..t-.- ..-_n...........,.__..._t___.___..-_._-._
- 3. _.,.-. ___ _ l- - _--. _.. __ + - - - -
___ A.__ _ 60, __. _ _ _ _ _. _ _ _t -.. - j.~~.~#'_t _._ ~~~~ 7dW ~~~~ !---- * -- !=C ~~ ~ i._ __ - E~_~ ._---..--Z_--..+__. ._t.~. ---w--- - - - - ~. _.. ~ _ _ _ _ - 0 ..r.. n t =Wi-'-. - r-- _~ -- = ._-,.__..: - - - " - - - = =
- W _-'.I _h._-_-+N.__...._
~-- +--A .e e _., 4--- = =y=..=--_% . t-t:___ t--- .;_._._ ___._..._t._.V._.__.t. t .v_____ ,0 Z.- ____.__F- _______r--g-'---* . _ _..:-E c .f --7 b 30 g -.x -.- __ .4_._ ._1._r.. --=z-_. a .__----t---- _ _ _.. _ 40 m.. _. _ _ _. _ ~__ _-.ir.
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_=- = 3 _. a ---t~-- r: : = - ---- 50 s w t _- _ g : +- _ ___, 70 i. tl _._ r + - _... - __ M_ 2 93_ t -+ ^ -~ 100 - ' ~ __E~-+,T-~~_~~ ' - ~ ,,.y,______r__-._ m - _ __. -; 2 "---.__f . _ _ = _, _Y. n. ._.. _. _ _. _ _ _ ~. ' y
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... _ _... _ _ _. _ _ = _ p--. a%%:r _____ _ ___,bl% ti-M ai_.s_ _ KiggM@ M7c "Jfa i-7 ~~- In-F --- . ' - ~ _ ~ _ ~ ~ g [~_~ Z - - =. -+:- .._.2--=- c, .. = .;_:__ _ _.._..g _ - := w - __.-r--_. ...? ;4 _ p.__. .__m _..t.___._.._.._n___.. 0 5 10 15 20 25 30 _ - ' - - ~ - ' - ' ~ ~ .._..__] SPRM CVEPAGE N FEET =._....=---d 2~~I ~_~ Er = _t C -l'-5h ~ i_. .__.._._____._____.t.=.==m._._i e- - - - . -1 PUTE : 31a spray pattern was determined by actual measure:nents down to a dtstance of 20' below the nozzle. At th.ts potnt ost af the spray par _1:les
- h. ave assu:ned a ver?.ical trajectorf establishing a pattern within reasonable proximity to th. indicated pet-n.
.I ( i .t ..SmYWG SYSTEMS CO. FIG. 9 d'JdOdMh sh a
April 20, 1977 APPPCXIMATE SPRM CmTPME VS. HEIGIT for the 1521.5-LC-304SS 6.3 WHIP! JET NC=II spraying water at 40 psi at room temperature undar laDoratory conditions. (Based on atzspheric conditions at 793 ft. above sea level.) N5!;_~i[f ~t-555E-IEb!_~r$i-- -C-N :ECI -N! -. ~ ' ~ ~~ ~N--Z N~~ N r
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l t--tr. y n___...__..- - 2r r..r ur = _._._.g-_- =.. _ y _.t g . r.. ". L-~~-'-.g;--~~-~. J .y _ yn _..__.__.__t. M...., - 1 ri -ird TE_iE_-j.-_.__ r.-.. =~_ l. n } a. C2 7..._. a%,, y i _-. t- - = _ t==== h.f,,,,', r - = - - - -- ~ ~ ~Ti-ri T =E= G~- ? = 9;a W.* i 3=:2_w.;_.hAhyg y ._._r.._. O-E-N E N-~-N E N 5 5 ~ '15 20 ' 2'S $0 $5 'I r==.i1 =l_EEi=s=i-if"= W " l=TE F T P- '~F T f l t =._ - -. _...!.E. _ _ E.. ~i.i=z t zI_ _ _4- _ o ?.=.j-; 'SMAY COV 22 23~- -I-- r ..t_ 9di=221$m-r=I'5EEkNN=I ;.iNb7 M -5 FAGE IN F5ET' l ~ ?xiE -iEEE IE5EE*-~~.Ei-}Edi?:a. j"Tif:E j _. _ _- - a_. l TrtE This spray pattern was deter"Juned by Act441 lReaS4rements dOWn t3 4 1 distance of 20' belcw the nozzle. At this point test of the spray partules have assu:ned a vertical trajectory establishing a pattern within reasonable - { proximity to the 1.ndi:sted pattern. qQP pp.a q. 9 gj a pDil d L s-mc srsrsus co. fwM we April 20, 1977 APPRCXD*. ATE SPfULY COVEFEZ VS. HEIGHT for the 15215-lC-304356. 3 WHI? MET NOO 7 E spraying water at 40 psi at room temperature under labiratory conditiors. (Based en at:mospheric cenditions at 79 3 Ft. above sea level.) .__.;;.I=_._._-..-.__-.m;_,==-;;;r.------.--- =2. _ ;_.. _2. ;=3 '-- t ---* r;. t-- r- = 5. ^Y-- g_... _._-- E2m@ M TS[f=5 E-E_=. MN3 -~ I 30 _ _ =-- =q.- ;5= y- ---- - ---~ q==- _==-- ^iE--gi :-- --_r_..__ l =l~=2d ' -f-i-MMI._i' ~.* _ 5-9_ ~_hW.'~ ~~ Db E _ _.... = -=m ;-- =:==. _ i.==. = zN' --..===; -.~ -c = =,.=t -- y.-. - _ - n. 10 _.-== --.m _.=..u.t------.. : ck=-.;-;=.:_,+= tc : :_= ;= 3===:=i.ggn=.__
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=- _ _ _. _ - = w e . - -. = _ _ __ my. y. w y. ___.m i 4 i ^ __ _wa N. A: =__.._..~_-E._ O .._______ _ _ _. _ ___ t-u 7_..__._____- r --l_-,__- -- I.- -I _ _ _. =. .._t_. _..__f. q_-___,.._._; 0 5 10 15' ~ 20' 25 ~F-i =-M r=== - = t.- m,---[r_ :2 1--f-f O~'~ ~ r ~- I ~ "l i = := : - -- =;--- ; - ;2 r_= -. SPPAY COVERAGE lN FEET --~..._....t.....-_.-.--_r.._.=.=-
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- s -- _ _=:_- n _g_-_ _n u.- _ _--,_ _. _q. - : _. i,, _,.. 1 tr:== NCTE: This spray pattern was determined by actual :neasure:nents down to a distance of 20' below the nozzle. At this point most of the spray particles have assu:ned a vertical trajectory establishi.nq a pattern within reascnable proximity to the indicated pattern. .i e g, t SPRAYING SYSTEMS CO. FIG.1I
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