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CONSOLIDATED@

CLOSED BONNET MAXiFLOW~

SAFETY VALVE

BABC0CK & WILCOX

INSTRUCTION BOOK

NO. 620-0006'

01 0003 00 ..

23 '//- y

28- 9 -5"

@ ssse]nDRESSER INDUSTRIAL VALVE & INSTRUMENT DIVISION

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TABLE OF CONTENTS

Section I

Page

1General . . .. ... ........... ...............................,

1Adjustment .................. ... .............. ......

3Disassembly . .. .. . ............... .....................

3Maintenance . ........ .... ............................

6Lapping Procedure . ..... .. ......................... .. ...

6Spindle Runout ............ .................. . . ....

8Assembly ........... . .......... ............. .... ...

8Lift Adjustment .... ............ .. .......... ..

- -

*| SECTION 11

CONSOLIDATED @ MAXIFLOW@ VALVE

10ROTO. LAP MACHINE . .. .. .. .. .............. ........

. .. . . ... .... 10GENERAL DESCRIPITON

10ASSEMBLY . . .. . . ..... . ...............

10USE .. . ... .. . .......... ....... ............

SECTION 111

1568 CONSOLIDATED @ HYDROSET TESTING DEVICE. 12... ...

SECTION IV

13REPLACEMENT PARTS AND SERVICE .. . -.....

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GENERAL . ADJUSTMENT'

. All 31700 Safety Valves are steam tested atConsolidetedC Series 31700 Steam Safety the factory. Every valve is set to have a clean pop-Valves are designed and certified under Section ping action and to reseat tightly. However, becauseIII of the ASME Code for application in nuclear the boiler used in setting the valves has a smallpower generating systems. capacity compared to the capacities of the 31700 I

type of valves, slight adjustments on the actual .

The details of the installation of any safety installation are necessary to maintain proper action i

valve are governed to a large extent by the ASME and blowdown. jCode. Pertinent paragraphs are: N.911.1 to N.911.3 *

of Section IIL Popping Point and Adjustment 3To change the po ping pressure of the valve 4Safety valves are carefully adjusted at the remove the cap and fever assembly, loosen the jfactory using high pressure steam to assure that lock nut and turn the compression screw clock-wiseset pressure closmg pressure, and operation are to increase pressure, or counter clock-wise to j

correct. decrease pressure. After each adjustment of the ?compression screw the locknut should be J

Inlet and outlet connections are protected for tightened. jshipment-and storage. Accumulation of sand, dirt, _ jetc. in relief valve inlet ports will be carried across Ring Adjustment jthe seat while 'tha valve is in operation and is fre- .

quently the cause of eat leaks and unsatisfactory The positions of the upper adjusting ring and ;operation. To prevent future trouble, store Safety the lower adjusting ring ne locked by means of !

Valves in a clean dry place and do not remove the the upper adjusting ring pin and the lower ring iP n respectively. These pins are threaded into thei,

wooden skid or flange protectors until ready for ,

installation. valve body and engage notches which are cut into.

the rings. To adjust either ring the correspondinggPn t be emoved. A screw driver can beiSafety Valves must be connected on full sized fvessel nozzles as direct and close as possible to

the vessel (Fig.1). No stop valve should be placedbetween the pressure vessel and i,ts relief valve Adjustment of the valve can be best under-except as permitted by code regulations. The valve stood by a consideration of the function of the two -

should be installed hi a vertical position only. In- rings. Together, the rings form a secondary orift,ce.

let bolts must be drawn down evenly to prevent which governs the pressure acting on the disedistortion of the valve body and inlet nozzle. when the valve is open. The position of the upper

ring relative to the seat will vary the degree whichthe steam cb nges direction in flowing through

The size of the discharge piping should never the valve r.ad will therefore vary the " reaction"be less than the valve outlet size. The arrange- on the lower face of the dise holder. A low posi-mer;t should be as short and direct as possible, and tion of the upper ring will result in a long blow-sho.11d be designed and installed to eliminate all down, a high position will result in a shortpossible piping strains on the valve from various blowdown.sources.

The Icwer ring is used to obtain a clean,

PoPP ng action and to cushion the closing actioniIn the event that a water sealloop is required, '

the size of the loop and the fluid temperature must of the valve. (DO NOT A'ITE?,IPT TO ADJUSTbe taken into consideration. BLOWDOWN WITH THE LOWER RING.)

In deta' the rings should be used as follows.

Ist The water seal loop must be largeenough in diameter to assure that the in adjusting one valve. The lower ring should bepressure droo at the valve inlet, when set mitially at about, one notch below the seatthe valve is tilowing, is not greater than level for every 200 psi of set pressure (10 notches50% of the blowdown ~ for a 2000 psi valve). The upper ring should be

set at about 13 notches above seat level, regard.Tem erature of the fluid in the water less of prersure. ~

2ndseal foop must be maintained at 620' if The 'wer ring should be moved upward

'the valve is to operate against the max- slowly, one notch at a time, to remove simmer. Theimum back pressure of 750 P.S.I. if the most ideal position for the lower ring is the lowestamount of water is not limited. If the position that does not introduce simmer. In this

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back pressure against which the valve is connection, it is imperative that extreme care be~expected to discharge is lower than the used in conditioning the seat surfaces, insuring

750 P.S.L mentioned above, the water correct alignment, and establishing the proper ',temperature in the loop can be reduced clearances, so that mechanical causes of simmeraccordingly, will be reduced to a minimum. f

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INLET PIPING AS |SHORT AS POSSIBLEAND EQUAL TO SIZE

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4In some cases where the valve closes from a 9. Place disc holder assembly in a "V" block .

Iow lift, but otherwise operates satisfactorily, the and usa an end mill in 1/4" diameter hole to w

disc, being free to swivel and rock through a small smooth upset locking thread. Fig. 3.anglseatm,e, will flutter against the seat damaging the 10. Place bellows assembly tool vertically in viseg surfacesbuzzm, g sound',. This produces a characteristic Fig. 3A. Place bellows, bellows housing disc,. It can be corrected by raismg

the lower ring one or two notches, causing the and dise holder assembly over assembly tool a

valve to close from a slightly higher lift. If the and lower to engage tool pins. Fig. 3B. Use clower rmg is set at too high a position, the valve a strap wrench and turn dise holder counter

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will have a long blowdown and may close from a clockwise to remove disc holder and disc >

high lift, with possible seat damage. from bellows housing. *

111. Lift out guide, top ring, and upper ring jThe 2romN should be raised to reduce the

blowdown and lowered to increase the blowdown, assembly. gfive notches at a time being considered a good 12. Determine lower ring position by placing a Taverage change. One notch will produce approxi- flat lap on bushing seat and raising the ring 4mately a two pound change in blowdown through- until contact with lap has been established. 4out the 3Fo to 4Fo range. Record the number of notches for positioning 3

during assembly. 9In attemptm.g to obtain blowdown on the y

order of 3Fo, it is important to be sure that the MAINTENANCE 3rings are not separated so as to lose control of ethe valve. The first indication of reaching this cor- It is not necessary to remove 3bnnow@ i

dition is a slow up-and-down " hunting" action (f flanged or welded valves from the boiler for anythe valve immediately before closing. If this action maintenance. The actual maintenance required isoccurs at a blowdown longer than desired, moving generally confined to touching up seats and oc-both rings downward a small amount will some- casionally replacing the disc.

Nn thh adju The following tools are recommended for thist, ,

twice as many notches as M1 Ems workA. Flat lapp 6g plate (Part No. VH-272).Check the ring pins to see that they engage B. Grinding compounds (Kwik Ak - Shunthe rmg grooves, but without touching the bottom.

Grade No.1000).*'rhe pins should not bear against the rings.C. High temperature lubricant.MT''M DO NOT AT1'E31PT TO ADJUST THE

(Never-Seez)"F D. Bellows assembly tool. .

E. Three ring-laps per valve. IDISASSEMBLY

For Parts Identification Refer to Fig. 2 RING LAPS

1. Remove six cap stud nuts, then lift cap and Orifice No. Is Fourth Digit Of Type No.lifting lever assembly from valve. (A 31739WA Valve Has A #3 Orifice)

2. Loosen compression screw lock nut. 31 ark the orme. No. Part No,

position of the compression screw and count #1 1672806 LAPPING CoMPCUNDthe number of turns required to barely re- #2 1672807 Kwik.Ak. shun (Grade 1000)

move all of the spring compression. This #3 1672808 she can par, N,

procedure will facilitate later adjustment of #4 1672810 1 Lb. 199-11the valve to near its original set pressure. #5 1672809 2 Oz. 199-12

3. Remove release nut cotter pin and unscrewrelease nut from spindle. ,

4. Remove bonnet stud nuts and lift bonnet "

from valve body. /;u '/I / / |

5. Lift spring and spring washers, as an as- / f/ |

sembly, from the spindle. // |6. Lift support plate and floating washer as- 1

|sembly from body.Ring or seat Lap e

7. Lift spindle to engage lift stop with bellows !'housing and gently raise dise holder, bellows h e[, I, D)

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fJa J L)and spindle as an assembly from the valve. United states Products Co. f518 Melwood st. U .O' a ,

8. Place assembly in upright position and lift Pittsburgh, Pa. ,3 -

spindle to engage dro,p-out threads. Rotate !ONeverseez corepound corp. i Aspindle counter-clockwise to disengage from :sfo s.18th Ave. ]Il 0I "gJ- " A4 -

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Top Spring Washer Assestly ;-

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ell of these tools can be procured from the H. To check ri.hg bps for flatness, wipe all com.factory prices on application. It may not be neces- pound off the lapping plate and ring lap. Thensary to 'Ise all of the ringlaps at any one time, use a figure 8 motion of the ring lap on the'

but having a sufficient supply on hand win save lapping plate. If the lap is flat there will bethe time. af, reconditioning them during. a boiler no shadow; if there is a shadow, coat the lap-~

outage. After the unit is back in service, the rihg- ping plate with compound and lap the ringlaps should be reconditioned on the flat lapping with a figure 8 motion covering the lappingplate, or returned to the factory for recondittomag plate to remove the shadow. Illustration B.at a nominal cost, on a speciallapping machine. A LAPPING PLATE RING LAPlap should not be used on .nore than one valvewithout being reconditioned. -r- -

Valves that have been leaking should be dis- / l

assembled in accordance with prior instructions. / ( %}Since the position of the adjusting rings has been j f sr (

,'/recorded, the rings can be disassembled for clean- /g ;.

lag if necessary. Parts for each valve should be / 'k \ \kept together or marked to make sure that they

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Reconditioning of the seat surfaces of the -

N b/ '/ Idisc and seat bushing is accomplished by lapping ,

< s A N / ,N jwith a flat cast iron ring-lap coated with Grade No. i ,

1000 Kwik-Ak-Shun silicon-carbide compound, or g f y ) 3 j

equivalent. , ,, g , j

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The following precautions and hints win \< i j

enable anyone to do a " Professional Job of Lap. \ /'

ping" Keep work clean.seats: * #

A.Illustration B

B. A lap.should not be used on more than onevalve without being reconditioned. L The seat now shan be thoroughly cleaned,

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Apply a very thin layer of , compound to the using a lint free cloth or tissue paper.C.Jap, this will prevent rounding off the edgesof the seat. If dedve hppbg of the Whbg seat is

D. Lap, using a reciprocating motion in all direc- required, a great deal of time will be saved if ations at the same time applying uniform pres- Roto. Lap is used. See instructions for assemblingsure and rotating the Lap slowly. Care should and operating the Consolidated 3 Maxiflow@ Roto-be used not to run off the seating surface with Lap Machine. Section IILthe lap as this will cause the seat to becomeuneven. When lapping the disc seat the Lap Referring to Fig. 4 it will be noted that theshould be held stationary and the disc moved seat step is .025. If this step is reduced to .010 dueas above with care taken not to strike. the cone to lapping, it should be remachined to the properof the disc as this would cause the seat to be dimensions. For this purpose there is available forhigh on the inside. use by the Consolidated 3 Service Department a

"Rcseating Machine'' which eliminates the need toE. Replace the compound frequently after wiping unit. This machme is

remove the valve from the,de retaining plate and[ off the old compound. Greater pressure put mounted in place of the gui~ on the lap will speed up the cutting action of cuts' t'te top face, inside diameter and outside

the lapping compound. diameter of the bushing to establish the correctF. To check the seat, remove all compound from heigl t relationships and angles.

the seat and lap. Then using a dry lap andthe same lapping motion as above described SPINLLE RUNOUTthe low sections of the seating surface winsPow up as a shadow in contrast to the shiny It is important that the spindle be kept veryp : tion. If shadows are present, further lap- straight in order to transmit the spring force tor.ng is necessary. Only laps kno,wn to be flat the dise without laterial binding. Overgagging isshould be used, as only a few mmutes will be one of the common causes of bent spindles. Arequired to remove the shadows. method to check the essential working surfaces of

G. When the lapping is completed, any line ap- the spindle is illustrated in Figure 5.peat 'as cross sen.tches can be rememi by Clamp a V block (A) made of wood, fiber orr;tating de Lap which has been wiped clean other suitable material onto the platform railing.af compound on the seat about its ov,n axis.

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A 8il LOWER RING UPPER RINGti HOLDER TO SEAT HOLDER TO SEAT!| ORIFICE IN NOTCHES .IN NOTCHES

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" Imbed the ball end of the spindle in a piece of- ~ Step I. Rotate t spindle . until' spindle threads7 ~

soft ' ood (B) and place Too of Spindle below the drops out of dise nut threads and makeswthreads, in V block (A). Clamp a dial indicator contact with the bellows seating plate.onto the railing and locate at point (C). The total Step 4. Place spindle, bellows, and dise holderIndicator re,ading should not exceed .0,03 when assembly into guide and lower gentlythe spindle is rotated. ,

, until disc contacts bushing seat...

Other parts of.the spindle not used as work- Step 5. Lower support plate, floating washer as-ing surfaces may run out considerably more than sembly into position on top of bellows.003 but this should not be regarded as an indica- flange.tion of crookedness or faulty manufacture.

The replacement disc has been lapped on our LIFT ADJUSTMENTspeciallapping machine and requires only that the Remove cotter pin from lift stop and spindle.seat be touched up. However, the seating plate Raise lift stop until contact with support plate isbearing surface must be checked for proper con. established.tact in the pocket,of the new disc. This can be Lower lift stop one notch at a time (ONEchecked with Prussian Blue. Both parts must showan even contact at least 3/16 wide. NOTCH =.010 lift) until required lift is established

(VALVE LIFT IS STAMPED ON NAMEPLATE).Place bellows assembly tool vertically in vise After adjusting and securing lift stop in its,

and lower bellows over tool to engage the two proper position, the following procedure must be'

locking pins. followed. Fig. 6.Apply hibricant Never-See: to nose of bellows, Lift spindle, support plate, bellows and disc

place disc in position on nose then thread disc bolder as an assembly out of guide. Caution: The, holder onto assembly and tighten with spanner bellows will withstand the weight of the support

wrench. plate but may be damaged if support plate becomes-

To lock disc holder, disc and bellows, use a jammed and additional force is used to lift theassembly.small punch to upset threads through the 1/4''

hole in disc holder. Fig. 3. Remove the support plate from the spindle,bellows and disc holder assembly bemg careful toprotect the bellows and disc from damage.

ASSEMBLY Lift the clide and ring assembly cut of valve- body and install the lower guide gasket in the

" Lowe* Ring: To position the lower ring place a body.straight edge on~the seat, then bring the ring Replace the guide and ring assembly in theby turning clockwise until contact is made valve body and install the upper guide gasket inwith the straight edge. (Ring is now on the the recess on top of the guide.same plane with seat). Back ring down from Place spince, bellows and dise holder as-seat one notch for every 200 pounds of set sembly into guide and lower gently until disc con-

*+ pressure. tacts bushing seat.Example: A valve set at 2400 pounds shall be Install lower support plate Rasket on top of

bellows flange an,d lower, tion on top of bellowss,up; c : plate, floatm, g12 notches below the seat. Install Ring Pin.washer assembly mto posiUpper Ring: Install guide and ring assembly in

valve and measure from the top of guide to flange. Place second support plate gasket into re-.

the seat. Remove assembly from body, then cess on top of support plate.'

set 'the ring using the same measuredient as Check all three ring pins to make sure thatthe overall length from the top of the guide each pin has adequate engagement in ring notchto the bottom of the ring. but must not bind ring.

Ring pins must have pin gaskets installedTop Ring: . Raise top ring to cover vent holes com- when checking for ring engagement.

pletely then back ring down one quarter turn Lubricate spindle beanng with Never-Seez andto partially uncover holes. lower bottom spring over spindle.CAUTION. TO ADJUST OR CHECK THE POSI. Lower spring and upper washer over spindle

TION OF THE LIFT STOP THE FOLLOWING and seat spring firmly on bottom washer. Lubri.STEPS MUST BE PERFORMED "WITHOUT" cate top washer bearing.THE SUPPORT PLATE GASKET OR GUIDE Top spring washer pin is used to prevent ro-GASKETS IN PLACE. tation of spring and washers when an adjustment

is mad s res e.Step 1. P e id and rings as an assemblymust be taken to insure proper engagement of

Step 2. Lubricate spindle tip with Never-Seez washcr pin in bonnet groove.and place spindle into bellows housing, Install bonnet stud nuts and pull down evenlydisc holder assembly. until tight.

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iJ UUJWJU W # "INSTRUCTIONS FOR ASSEMBLI two sets of four Laps each, Item 10. Kits for :3

& OPERATING THE CONSOLIDATED @ and e4 and =5 orifice valves include one set ofMAXIFLOW@ ROTO. LAP MACHINE four Laps, Item 10, and one set of four larger or

GENERAL DESCRIPTION alternate Laps, Item 11.'

The Consolidated @ Maxiflow@ Roto. Lap Ma- ASSEMBLYchine is a hand operated tool for refimshing Proper assembly of the Roto-Lap can be ac-damaged or worn nozzle seats in Consolidated @ complished by referring to Fig. 8. The mountingMaxiflow@ Safety Valves. It has been expressly Flange, Item 6 has three sets of four holes each:developed for the pur70se of generating a flat the inner set marked 1-2; the center set markedsurface and its use rnaterially reduces lapping 3 and the outer set marked 4-5. First select the settime. of marked holes corresponding to the size of the

The Roto-Lap will not correct a seating sur. orifice to be lapped and insert the Should'er Screws,face which is out of square with the valve center Item 7, downward through these holes.line, nor will it reshape the original dimensions of The orifice size can be identified by referringthe nozzel seat. For either of these purposes, a to the valve type number stamped on the valvespecial reseating machine is required or the valve nameplate.must be removed from the boiler and the base and The third digit in the type n Imber is thebushing assembly remachmed. valve orifice size or number. As an example, if the

GENERAL NOTES valve is Type 1747WA, the third digit, #4 is theorifice size or number and the Shouldered Screws

The Maxiflow@ Roto-Lap Machine is made up would be inserted in the set of holes marked "4 5"of parts as shown in Fig. 8. A duplicate Bill of on the Mounting Flange.Material is also pasted inside the cover of the Next assemble the four Lap Gear Washers,carrying case. Item 8, four Lap Gears, Item 9, Center Gear, Item

A Mounting Flange, Item 6, fabricated with 5, and Laps, Item 10, in this order. The shoulderson the Shoulder Screws should seat against thethree sets of four holes on three diameters is pro- recesses in the top surfaces of the Laps. An Allenvided for use on all valves with orifice sizes el

' thru #5. Kits for #1 and #2 orifice valves inclu leSet Screw wrench is provided for tightening theShoulder Screw to the Lap. Each Lap, Lap Gear

Vg 7 ,,,,, .2, T and Shoulder, Screw assembly should rotate freelyy--

in the Mountmg Flange., , , , - o,a

.$ T M The Center Gear must engage in all four Lap'

D2fMyt Gears and must be in place before the Laps areM47,*' 4 assembled to the Shoulder Screws. When properlyy

' N f, " , " * Ot- assembled, the Center Gear should " float" in thek3 N ' M,,,' T' ~$ g!- space between the Laps and the Mounting Flange.D ,h Attach the Handle Asscmbly to point "Y" on

| h. the Mounting Flange spud by means of the Allen

g, s y %- Set Screw provided.c: Place the Bore Guide, Item 2, inside the bore

LN@ f of the safety valve seat bushing or nozzle andtq|g.- - c

j p. A ] g -%yV push it down as far as it will go. The top of the'\ . flange, point "R" must be below the seating sur-F )-

"

face of the nozzle. A small amonit of light oil on

i

E Uo T /*' the "O" Ring, Item 3, will assist in getting theG .-. * *"'' " "' guide nto this position.i.,

USE~

Where two different sizes of Laps are pro-_d _

-

vided, tne larger set will cut faster than thehm s'/. <- smaller and should be used for removing nicks and'

ether severe damage. The smaller set of Laps cutse 3- ~ <

A%m- A ", 2 ;,M//Z slower and is better for finishing the seat surface.,

S . W m . c . "' ** Apply lapping compound to the lower faceIn of each of the Laps. Normally 1000 grit grinding/ N<

. ' /. compound similar to KWIK-AK-SHUN Grade=1000. should be used. However, a heavier grit'jcompound may be used where necessary. A smallamour.t of oil placed on the Laps with the com-

TTg. 2-Nomenclature Roto Lap Machine Pound will produce a better finish.,/ '

10 C

---_. .. . ..._-- .. ---

'

.

4

.

Drop the Slounting Flange kssembly over the the seat as !apping progresses, and is easily re.Bore Guide extension shaft so that the shaft placed for further lapp,ing if necessary. Also, thepasses through the Center Gear and into the center Bore Guide, remaining in the bore througliout thehole in the 31ounting Flange. TURN THE HAN- entire operation, prevents foreign material fromDLE CLOCKWISE slowly until the Key, Item 4, falling into the boiler.engages in the keyway in the center Gear and After the removal of nicks, etc., the surfacepresents its further rotation. At this point, the finish can be improved if the surplus compoundLaps wt11 drop onto the seating surface. Further s w ped away from both the nozzel seat and therotation of the hand,le causes,the Laps to move laps and the lapping continued with a minimumin a planetary fashion, rotating as they travel amount of compound. Final finishing should bearound the seat. Lap by turning CLOCKWISE un- done with a new hand lap, using 1000 grit com-til the desired finish is produced. pound to insure minimum deviation from a per-

,

You will note that the 3Iounting Flange As- fectly flat surface. Ring laps are provided in thesembly lifts off easily for periodic inspection of Roto-Lap Kit for this purpose.

,

.

s

.J

11

.

'

. .

,

.

1566 HYDROSET '- SECTION 111

One Yoke, Fig. 91566 HYDROSET TESTING DEVICE One Turnbuckle each, Fig.10, for the variousFOR SETTING CONSOLIDATED @ stzes

One Hydroset UnitMAXIFLOW@ VALVES Pump, pump hose and fittings.

Setting safety valves by the usual method of METHOD OF ADJUSTING VAL.VESlifting valves under steam pressure presents a To use the setting device refer to Fig.11 fc'-number of problems. In high pressure convention- '

al boilers superheater tubes may be damaged if the following procedures.the turbine is not operating. Also, the expense of Remove lifting gear and release nut from topfeed water, fuel and personnel involved is con. of valve and its spindle.siderable. If safety valves on conventional unitsare set with the turbine in operation, a procedure Place Hydroset yoke on top of compressionnecessary for all ,once through boilers, large load screw and place turnbuckle on spindle making oneebany2s occur with the rapid pressure changes revolution to engage spindle thread.that occur. Turn the turnbuckle clockwise fully engaging

the left and right hand threads. The turnbuckleAlthough these problems cannot be elimi. should not be tightened, but should be merely

cated entirely, they can be lessened by using a finger tight. When the turnbuckle is prope,rly en-hydraulle device to assist the steam pressure under gaged, the top of the piston will be approxunatelythe valve seat to be in balance with the opring even with the bottom of the bevel on the uppercompression above the valve seat. flange, and the lower flange will rest on the top

f the yoke. 7Accuracy of results obbined by the use of this The chart used in the test is made up with a

device depends on several factors. First, friction differential between desired set pressure and act-has been entirely eliminated as a source of errorso that for a given pressure the Hydroset repeat- ual steam pressure.

edly produces exactly the samelifting force. Gauge Referring to the chart, Fig.12, the valve..

accuracy and variation in effective seating area is to be tested in,the following manner. Startingbetween valves of the same size and type will aMo with a predetermined boiler pressure, the Hydro-affect accuracy. With well calibrated gauges and set pressure required is determined by the inter-valve seats in good condition, accuracy on the section of the lines of the required set pressureorder of 1% may be expected. and Hydroset pressure.

,

EXAMPL'i: With a boiler pressure of 1500This method has been approved by the PSIG and a required set pressure of 2500 PSIG,

A.S.M.E. Code Committees. follow set pressure line (indicating difference be-tween 2500 and 1500 or 1000 PSIG), vertically tointersect with the desired orifice size curve. The

EQUIPMENT Hydroset pressure required then can be read onthe left side of the chart. In this example for a

The components used in hydraulically adjust- 31739 valve, the Hydroset pressure will be 520ing the set pressure of CONSOLIDATED @ Maxi- PSIG.flow @ Safety Valves consists of:

'h 0

aemO -

}a iI

OJU_u_1._g a _1

w.se' Ns" e,y e^ NY

.

i 1.t

. . .. _ 's- . _ . 3118 gat,t3 ! g|

E .a! M ia - , , , , . u ,.w.

n w-IIId,t 4

.I , a T m r. . . . . .m a w...i e ! . t e . mi. .... , m . . n w.

Y f v: iM. I d. 11: u - eac n w.:1 am. ,,1''

, e' % ,X , m ,. 1 n . .... n m .sp m'.,

I !

Fig.10Fig. 9

'eb ') } [12

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

'' '

, ,

\*

-s

~

.

A SATISFACTORY PUMP IS THEASHCROFT MODEL 1:27 WITH A

- CAllBRATED GAUGE SulTABLEFOR THE A.lTICIPATED SETTING

REQUIREMENT.

.

Gauge'

J (Supplied By.. -. - --

/ Customsr)"

N- 2~1/ 2'"REQ'O. DIN. fbR INSTALLATION [-$ V I

16-1/4 Hydroset

/ [Q N g urnbucklei12-1/4"

7 akeY, ,o

-- (T"T) (TT)1

CONSOLCATED

/ .

.

f_ _ _ _ ;- NOTE: GAUGE CONNECTION TAPPED,

- - - - - 1/2-14NPT HOSE CONNECTION

TAPPED 3/B-18HPTo,

Pump

PUMP, HOSE ANO flTTlHGS SUPPLIED BY CUSTOMER.

NYORAUllC FLUID SHOULO BE'A PETROLEUM BASE FLul0.

" CAUTION" 00 NOT USE BRAKE FLUl0. gg

J o o Ju*

- - ~'

,

lo JE _ JLI_ I i__a

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To determine the pressure setting of the After Hydroset pressure of 520 PSIG andvalve, increase the hydraulic pressure to the valve valve opening occur simultaneously, reduce Hydro-that causes the valve to " spit" or simmer. This set pressure to zero and recheck setting by raisingpressure can be readily noted because of the Hydroset pressure to 520 PSIG.abrupt downward deflection of the pen occurringat the time the valve spits or simmers. (NOTE) The 2000 PSI appearing on the Hydroset

Unit is in effect the upper limit to wi:ich this unitIf Hydroset pressure is greater than 520 PSIG, should be subjected. Continued use of the unit in

follow the above procedure except to reduce pres. excess of 2000 PSI will probably damage the smal.sure turn compression screw counter clockwise. Ier bellofram.

REPLACEMENT PARTS SKTION IV

Replacement Parts Dresser-Industrial Valve & Instrument Divi-sion, maintains the largest field service staff in

When it becomes necessary to order replace. the industry. Service Engineers are located atment parts, the order should state: strategic points throughout the United States to

respond to customers' requirements for service.1. Part name Each Service Engineer is factory trained and long

experienced in servicing Safety Valves. Our Serv-2. Valve size ice Engineers restore disc and nozzle critical di;

mensions which affect valve performance, and are3. Valve typecapable of modernizing valves in the field.

4. Serial number of valveThe following spare parts are recommended:5. When ordering spring assemblies, also

state the desired set pressure. 1. Dise for 50% of each type and size drum**IV'Refer to Figure 2, Section I, for part name.

All other required information will be found 2. Disc for 100% of each type and size super-stamped on the nameplate attached to the body of heater valvethe valve.

3. One set of adjusting rings for each typeIn addition, the serial number is stamped on and size superheater valve

the top edge of the outlet flange. Be sure to in.clude the one or two letters preceeding the figures 4. One set of ring pins for each type and sizein the serial number. A typical valve nameplate valveis shown in Figure 14

FACTORY REPAIR FACILITIES.

If boiler downtime permits, it may be desir-=g able to return the valves to the factory for repairW;e r. U.f Mm eM;= '

[ s.nm . m w c _ T or modermzmg. The factory at Alexandria, Louisi-,

% ......w.o m m. ,,a. . gj ana maintains a complete CONSOLIDATED @ repairM F 1 0!M 2." 2 | % # 6 center. In addition to factory production stock, the* 31739 **TE'1 BJ0000 f repair center utilizes its own stock room. Most& 2 1/2 g: .,.,;::,;g 1.800 17

important, this enables the tactory to make return.

29760 (r BOf=3h SAT..

. shipment of repaired valves withm forty-eight2500 e .g 75 im .m

j (48) hours after receipt of customer's purchase%@ ht y 450 g order.

Each valve is tested and adjusted on CON-SOLIDATED@ 2500dt steam test boiler. Final

Fig.13 testing is witnessed tiy quality control inspectionas being properly set and adjusted in accordancewith the ASME Power Boiler Code.

FIEl.D SERVICENEW VALVE WARRANTY

Utilities expect and demand service on 4 mo.ment's notice. Should'it become necessary, utili. Both factory and field repaired valves carryties can depend on CONSOLIDATED 3 Field Ser. a warranty, which covers workmanship and newvice, even on extrene off hour emergency parts installed during repair, for a period of onesituations. year from date of repair completion.DkP D

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OUTLET FLANGE

e

|| 2 ROUND TOROUE IW FT. LBS.

O O ' d5

'O O' 2 85

3 1 45

5 25

9 O O'~

eROCE0uRE.

1, Rr1ER TO TABLE AB0VE FOR TOROUE FT

is. VALUE FOR APPLICABLE ROUND5O O,O O 2. TOROUE EACH HUT IN SEQUENCE SHOWN I

.

flGURE I TO APPLICABLE TOROUE FT.Lei 12 T VALUE.-

3 PROCEED WITH NEIT ROUNO INACCCROANCE WITH STEPS I & 2.

lHLET "

flCURE I,

SEQUENCE FOR TORGUE

APPLICATION TO OUTLET NUTS*

.'

NOTE'

NUNSER STUD 10.000PSISTRE;S-

Fl.ANCE TYPEOF STUDS THREAD FT/lt3S ' TORQUF-

THAT VALUE REQUIRED TO MAKES - 600: 17 1 - BUNC 245 A TICHT FLANGE 101.4T.

NO C0dSIDERATION HAS BEEN GIVEN-

TO LOA 0 LNG WHICH HAV BE*.

REQUIRED TG ALICH PIP!NG OR

ACCOW00 ATE THERMAL PIPlNG STRAl.15

TOROUE VALUES APPLY ONLY TO,

SPIRAL #0VND GASXETS WITil--

WETAL TO NETAL 10ldT CONTACT'

7 ,1 ' , 7 9 f). ' 'c'-,

2 *

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fg 9 OUTLET FLANGE Bolitric CHARTo

D) 9Ti 31700 PRESSURIZER SAFETl,

g {n VALVES ASWE SECTI0d III.

5 B5 ro$ D $ h 0''.

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|NLET FLANCE

TOROM IN H . b S.ROUND

l l S-8UNC l 1 4-Bt!NCI

O O - 1 60 802 *~

2 u0 na3 100 260

3

.Q B 4 270 370

5 355 500

) PROCEDURE

5Q gQ 4 !. REFER TO TABLE AB0VE FOR TOROUE FT#

LB. VALUE FOR APPLICABLE ROUND.

~*

2. TORQUE EACH NUT !!! SEQUENCE Sl!0h'N IN'

; FIGURE I TO APPLICABLE TOROUE FT. LBi 8 YALUE.

3. PROCEED WITH HEXT ROUND IN*

ACCORDANCE WITH STEPS I & 2.

00TLFT >

_. FIGURE I

SEQUENCE FOR TORQUE

APPLICAT!0N TO INLET tutss

*NOTE

NUMBER STUD 30,000 PSI STRESSFLANGE TYPE.

OF STUDS THREAD FT./LBS _ TOROUE i TOROUE VAldES ARE PURELTTHAT VALUE REQUIRED TO HAKF2 I ~2 - 2500* 8 1-1/8-BUNC 355 A TIGHT FLANGE JOINT

H0 COCIDERATION HAS BEEN GIVE t3-7500s 8 l-1'4-80HC 500 TO LDA0lHG ,WHICH WAY BE

*

REQUIRED TO ALIGN PIPlilG 1RACC0400 ATE THERWAL PIPING STRAINS

-

TCRQUE VALUES APPLY ONLY TO

SPIRAL WOUND GASKETS WITilWETAL TO METAL JOINT CONTACT.

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INLET FLillGE BOLTING CilART[ b a OJ

31700 PRESSUR12ER SAFETYO

f)) YALVES ASME SECTION IIEo 1_ JJJ 1[. b.

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W*TTED STATIS

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THE DRESSER FIELD SERVICE ORGANIZATION IS UNEQUAL.ED.For promDivision, pt field service, please call Dresser Industrial Valve & InstrumentService Department, Alexandria, Louisiana.

All hours. Area Code 318 445-5381. -

fAlexandria, La. 1

Boston, Mass. 2Bridgeport, Conn. 3

Location of Service Men chicago, litinois 4Tulsa, Oklahoma 5

g p Los Angeles, Cal. 6.

0 Baltimore, Md. 7(g g f Columbus, Ohio 8

"[b'9~To U U)J .J _ i b v? 222