Double Disc Gate Valve

7/28/2019 Double Disc Gate Valve

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DOUBLE DISC GATEVALVEPRESSURE SEAL BONNET

VALVE DIVISION


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VALVE CODE 85

Index..................................................................................................3

S ec tiona l view a nd de scription of the main components ............. .4/5

Ma in d imensions, w eights a nd C v values .........................................6

Adva ntag es of the double d isc w edg e s ystem..................................7

Explod ed d ra w ing a nd sta nda rd ma teria ls ............. .............. ..........8/9

P a ra lell-S lide valve ............. ............. .............. ............. ............. ........10

Address............................................................................................11


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BBE VALVE DIVISION

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VALVE CODE 85

1

BODY

Available both in cast andorged steel, it has been

des igned to meet all therequirements of ASME, APIand British Sta ndards.

The bod y-bonnetconnection is ma de by apressure seal gasket. Its pre-stress cond ition is ac hievedby means of bolts screwed

o the bonnet flange.Ends are normally butt-welding a lthough they canbe also flanged on request.

All bodies are provided withntegrally cast bosses,ocated and sized in

accordance with ASMEB16.34, which allow theprovision of drain and by-pas s c onnections, s uppliedon request.

Four internal guides keephe discs a ss embly in plac e,

enabling operation of thevalve with stem in bothvertical and horizontalpositions.

Two internal boss es in theower part of the body a re

mac hined to create themechanical stop of the lowerwedge.

2

BONNET

Usually constructed in thesame materials as the body,being designed so that thewa ll thickness alwaysexceeds the requirement ofAPI 600.

A back s ea t (13) bus h isitted inside the bonnetower cavity, to provide a

closure w hen de valve is fullyope n. This permits the va lveo be repacked w hile in

service.

The bonnet has a d eepstuffing box in which

pac king rings a re plac ed.Stuffing box is designed withsufficient space to allowantern ring to be fitted.

3

YOKE

Separate rigid yoke isprovided to w ithstand thehrust of the a ctua tor. Large

windows allow easy accessand ventilation of thepa cking area . The yoke isconnected to the body by a

two piece clamping ring(193) an four clamp bolts.This co nnection is very so lidand enables eas ymaintenance at s ite.

The uppe r part o f the yo keis suitably ma chined tohouse the yo ke sleeve (11).

The yoke is usua lly ma de o fcast carbon steel regardlessthe type of bo dy ma terial,unless otherwise requiredby the client.

4

STEM

Constructed in s tainlesssteel, machined from solidba r stoc k. The s imple piecestem in threaded in theupper wedge.

A conical shoulder is alsoprovided to e nsure effectiveand tight seal backseatwhich allows the stuffingbox to be replaced with thevalve in service. The s temdimensions conform to API600. Spec ial care is takenin the mac hining of the s tem,including the final polishingof the tra velling area(contact with the stuffingbox). This allows a low-

friction surface and asuperior corrosionresistance.

5 - 125

GLAND BUSHING AND

GLAND FLANGE

They a re supp lied in twoseparate self aligningpieces, to ensure uniformpressure is effected d uringtightening of the packing.

The uppe r part of the g land,which comes in contac t withthe gland flange, is s phericalin sha pe.

The gland flange is ma de o fca rbon steel but, uponrequest, other materials canbe supplied.

22 - 128GLAND BOLTS AND

NUTS

The gland s tuds a re of theeye-bolt type, which can beswung outwards for ease ofgland repacking.

6

SEAT RING

They a re supp lied in forgedstainless steel, hardfacedwith St ellite-6 (2mm of min.

thickness). Seat rings arerenewable, normally w eldedto the body.

Sealing contact surfaces,are lapped for a perfect tightsea l. C ontrolled hardnessdifferentials a re maintainedbetween the wedge discsand the seat rings, asrequired by API 600 Std.

9

DISCS

The two forged discs aremade of the same materialthan the body, and theseating areas are hardfacedwith 2 mm minimumthickness of S tellite-6.

The important b enefits ofthese revolving d iscs areexplained widely in anothersec tion of this ca talogue.

11

YOKE SLEEVE

Designed to permit removalfrom the bonnet or yokewhile the valve is in service.

The yoke b ushing as semb lyis mounted in ball bea rings.It is normally mad e of c as taluminium b ronze, ha vinghigh resistance to w ear andhigh melting point. Othermaterials such as Ni-resistcan be supplied on request.

13

BACK SEAT

The back sea t can besupplied as a threadedsta inless s teel bush, weldedto the bo nnet or of integraltype. It can be hardfacedwith S tellite-6 or orthermaterials a s required.

This sea t allows the valve tobe repacked under pressure.

15

HANDWHEEL

The handw heel can b esupplied either in cast

construction of fabricatedfrom steel tube.

The hand wheel is des ignedto allow ea sy operation ofthe valve. Other types o fcontrol are available and, insome cases, areindispensab le for a goo doperation, for instanc e:

Chain wheel

Gear operator

Hammer handwheel

Geared hammer

handwheel

Electric ac tuator

Electro-hydraulic ac tuator

Pneumatic actuator

17

PRESSURE SEAL

GASKET

The pressure sea l ga sketsare usually supplied ofcompressed graphite,bordered on the upper and

lower edg es w ith braidedfilaments of carbon fiber.

Gas kets can also be madein stainless steel.

68

PACKING

Pac king is made of anadequate number ofpreformed rings.

For general applicatios highgrade graphite material issupplied, using compressedrings in the center andbraided anti-extrusion ringson top and bottom. Graphiteis s elected of an a pprovedquality.

Other types of pa cking a realso available for particularservices.

80

DISC RETAINERS

The disc retainers a re madeof the sa me material thanthe bo dy. They a re firmlyconnected to the upperwedge and keep the discsin place while allowing theirrevolving fea ture.

The syste m of Stem, Discs ,Upper Wedge and Discretainers a re crossed by aWed ge P in (198) of S ta inles sSteel, connected by twonuts (129 A) and co tter pints(198 A).

13 2

SPACER RING

Made of a single piececovering the upper part ofthe pressure seal ga sket. Itis normally ma nufactured inthe same ma terial as thebody.

13 3

GASKET RETAINER

It is made normally of thesame material as the body,and c onstructed in fourpieces, called segments.The segments a re sized to

minimize the ga p be tweenthem.

The s egme ntal ring s upportsall the forcers transmittedfrom the bonnet through thepressure sea l gasket and thespa cer ring. It is ca lculatedto w ithstand all the forcewithout cracking.

13 4

BONNET RETAINER

Designed sufficiently

resistant to withstand theforces transmitted by thebonnet screws (111).

The b onne t reta iner isnormally mad e of the s ame

material as the body, but itcan be constructed in anyother mate rial on reque st. Itis machined to ma ch exac tlywith the bod y, whatguarantees a perfectalignment of the unit.

19 3

YOKE CLAMP

The connec tion betw eenbody and yoke is created bymeans of a bipartite

clamp ing ring. The internalconnection between theclamp, body and yoke isconical, ass uring a p erfecttightening.

7 & 7A

UPPER & LOWER

WEDGES

The wed ges aresconstructed in forged or cas tsteel of the same ma terialthan the bo dy. The conta ctsurfaces a re hardfaced withS tellite-6. The spec ialgeometry of these wed geshas been designed so thatthey cannot becamedisengag ed w hile they are

sliding. The wedg es impartthrust to the discs whichmove towards the seat rings(6) assuring a tight seal .

Two wed ge springs (56) areloca ted in the cavitiesbetween the upper and

lower wedge s, in order toabsorb the inertial forces andpermit a s oft contac t of thesliding inclined pa rt of thewedges.

56 7A7


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BBE VALVE DIVISION

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The valve weight is for Butt Welding ends

Dimensions are in mm., and weight in Kg.

Dimensions not shown for classes and 4.500

to customer requirements

PRESSURESEALBONNET

VALVE CODE 85

DOUBLE DISC GATE VALVE

4500ASME CLASS

S IZE 2 2 I/2 3 4 6 8 10 12 14 16 18 20 22 24 28 32

A 514,3 514,3 432

F (RF)

J (RJ )

B 806 806 806

C 457 457 457

WEIG HT 480,7 478,4 584,2

OP ER ATIO N HANDWHEEL

Cv 109 163 272

2500ASME CLASS

S IZE 2 2 I/2 3 4 6 8 10 12 14 16 18 20 24 28 32 36

A 2 79 ,4 3 30, 2 3 68 ,3 45 7, 2 6 09 ,6 7 62 91 4, 4 1 04 1, 4 1 117 ,6 1 24 4, 6 1 39 7 13 97 1 62 5 1 90 5 21 84 2 41 3

F (R F) 4 50 ,8 5 08 5 77 ,8 6 73 ,1 9 14 ,4 1 02 2, 3 1 27 0 1 42 2, 4

J (R J ) 4 53 ,8 5 14 ,3 5 84 ,1 6 82 ,7 9 27 ,1 1 03 8 1 29 2, 3 1 44 4, 7

B 515 736 736 840 1000 1220 1484 1680 1842 1988 2250 2510 2950 3450 4150 4900

C 381 457 457 534 800 600 750 600 900 600 900 900 900 900 900 900

WEIGH T 1 38 1 58 ,7 1 67 ,9 2 41 ,5 4 55 ,4 7 87 ,7 5 15 24 ,9 2 37 5, 9 30 82 3 73 7, 5 50 02 ,5 6 53 2 9 54 5 1 32 25 2 03 55 2 41 50

OP ERATION HANDWHEEL G EAR

C v 145 200 300 500 1250 2200 3600 5200 6400 8500 10875 13325 19725 29183 37720 50592

1500ASME CLASS

S IZE 2 2 I/2 3 4 6 8 10 12 14 16 18 20 24 28 32 36

A 2 15, 9 2 54 3 04, 8 4 06, 4 5 58 ,8 7 11, 2 8 63, 5 99 0, 6 1 066 ,8 1 193 ,8 1 34 6 1 473 ,2 1 75 2, 6 2 20 9 2 413 2 56 5

F (RF) 368,3 419,1 469,9 546,1 704,8 831,8 990,6 1130,3 1257,3 1384,3 1536,7 1663,7 1943,1 2209 2413 2565

J (R J ) 3 71 ,3 4 22 ,1 4 72 ,9 5 49 ,1 7 11 ,1 8 41 ,4 1 00 0, 2 11 46 1 27 6, 3 1 40 6, 6 1 55 9 1 68 6 1 97 1, 5 2 22 8 2 43 2 2 58 4

B 530 758 758 861 1002 1080 1490 1530 1850 1960 1950 2385 2795 3405 4150 4950

C 254 381 381 457 686 686 600 750 900 750 600 900 900 900 900 900


WEIGHT 7 4, 75 8 3, 95 8 3, 95 1 84 3 79 ,5 6 50 ,9 1 07 6, 4 1 47 2 2 35 7, 5 2 77 7, 25 42 68 ,8 5 17 5 8 22 2, 5 11 09 7, 5 1 52 37 ,5 18 57 2, 5

C v 218 300 450 817 1875 3275 5250 7525 9175 12150 15500 19600 28775 42572 55027 73806

ASME CLASS

S IZE 2 2I

/2 3 4 6 8 10 12 14 16 18 20 24 25 30 36A 2 15 ,9 3 04, 8 3 04, 8 3 55 ,6 5 08 6 60 ,4 7 87 ,4 9 14, 4 9 90, 6 1 092 ,2 1 21 9, 2 1 32 0, 8 15 49 ,4 15 74 1 778 2 03 2

F (R F) 3 68 ,3 4 19 ,1 3 81 4 57 ,2 6 09 ,6 7 36 ,6 8 38 ,2 9 65 ,2 1 02 8, 7 11 30 ,3 12 19 ,2 13 20 ,8 15 49 ,4 15 74 1 77 8 2 03 2

J (R J ) 3 71 ,3 4 22 ,1 3 84 4 60 ,2 6 12 ,6 7 39 ,6 8 41 ,2 9 68 ,2 1 03 8, 3 11 39 ,9 12 31 ,9 1 33 3, 5 1 56 8, 4 15 93 ,5 17 97 2 05 1

B 530 638 638 831 1072 1186 1500 1540 1725 1836 2220 2412 2650 2880 4060 4885

C 254 305 305 381 610 686 800 1000 750 750 1000 750 1000 750 1000 1000

WEIGH T 7 4, 75 7 7, 05 7 0, 15 1 01 ,2 2 51 ,8 5 4 41 ,6 7 63 ,6 9 77 ,5 1 70 2 2 16 2 3 17 4 4 12 8, 5 6 15 2, 5 65 32 1 03 50 1 55 25


C v 218 300 500 950 2175 3825 6125 8850 10875 14325 18300 22875 33275 36678 50198 87027

900

600ASME CLASS

S IZE 2 2 I/2 3 4 6 8 10 12 14 16 18 20 24 26 28 32 36

A 17 7, 8 2 15 ,9 2 54 3 04 ,8 4 57 ,2 5 84 ,2 7 1 1, 2 8 12 ,8 8 89 9 90 ,5 10 92 ,2 1 19 3, 8 1 39 7 1 44 7 15 49 1 77 8 2 08 2

F (R F) 2 92 ,1 3 30 ,2 3 55 ,6 4 31 ,8 5 58 ,8 6 60 ,4 7 87 ,4 8 38 ,2 8 89 9 90 ,5 0 92 ,2 1 19 3, 8 1 39 7 1 44 7 1 54 9 1 77 8 2 08 2

J (RJ) 295,1 333,2 358,6 434,8 561,8 663,4 790,4 841,2 892 993,6 1095,2 1200,1 1406,6 1456,6 1558,6 1787,6 2091,5

B 500 533 686 813 1067 1168 1397 1626 1753 1981 2108 2489 2794 2990 3150 3550 3 800

C 203 203 254 305 355 510 510 610 610 610 915 915 915 915 915 915 915


WEIGHT 3 4,5 3 6,8 5 5,2 8 9,7 1 90 ,9 3 16 ,2 5 4 99 ,1 6 90 1 01 6,6 1 3 53 ,5 5 1 75 6,0 5 2 75 4,2 5 3 92 0,35 4 54 2,5 5 4 62 ,5 1 02 92 ,5 9 40 1,2 5

C v 27 3 3 75 5 50 1 02 5 2 37 5 4 22 5 6 62 5 9 85 0 1 20 25 15 900 20 10 0 2 49 00 36 525 4 63 00 54 03 8 69 848 9 36 85


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VALVE CODE 85

EASY MAINTENANCE

The four piece doub le disc wedg e as semblyca n neither be incorrectly as semb led norbecome disengaged while in service.No special fitting at site is required forma intena nce . The repair of minor sea t or discdamage is greatly simplified because theseats and discs ca n be lapped independentlyof each other. Disassembly and maintenanceca n be ac complished without spec ial toolsor elaborate rigg ing.

UNIFORM DISTRIBUTION

OF SEALING PRESSURE

The tight s ea l is g uaranteed even w hen thevalve sea ts ha ve beco me out of parallel dueto b ody distortion, d ue to the uniformdistribution of the sealing pressures allowedby the exclusive wedge design.

RELIABLE OPERATION

The Double Disc G ate Valve has been

des igned to a ss ure reliab le ope ration underthe mos t severe service c onditions.Due to the special configuration and geometryof the upper wedge inclined face, anypossibility of locking the disc in closedpos ition is eliminated , even w hen c los edq uickly or subjected to s evere thermaltransients.

RAPID CLOSURE

BB E's Double Disc Wedg e sys tem permitsrapid closure without sea t distortion. Interna lmoving pa rts dec elerate independe ntly ofeach other with the result that inertial forcesare dissipated in a s eries o f impa cts over aperiod of time. The larges t of the se istransmitted d irectly to the bottom of the valvebody on a non-sealing surface. Forcestransmitted directly to the seats are a smallpercenta ge of the tota l inertial forces . This isa distinct advantage over valve designs inwhich the to tal inertial force is ab sorbed

directly by the s eating surface.

UNIFORM SEAT WEAR

The incorporation of a uniq ue revolving disc

feature as sures ma ximum sea t life.The two independ ent discs , during ea chclosing stroke and immediately prior to thedisc sea ting, rotate a few d egrees in theplane of the s ea ts. This rota ting a ction forcesthe disc to sea t in a d ifferent pos ition on ea chstroke, eq ualizing w ear on the sea ts a nd thediscs. This mo vement of the discs creates alapping effect whenever the valve is operated,removing pa rticles from the se aling s urfa ce sbefore they can become wedged betweenthe seats and the disc a nd cause dama ge.

TECHNICAL ADVANTAGES OF THE DOUBLE DISC WEDGE ASSEMBLY

LOW PRESSURE SEALING

The wed ge a ss embly is de signed to impartsufficient thrust to each disc to maintain lowpressure sealing. As the differential pressureac ross the disc increas es, the sea ting loadalso increases, thus providing a tight sealthrougho ut the entire rang e o f operatingdifferentia l press ures .

Since the discs are independent of eac hother and the des ign is symmetrica l, pos itivesea ling ca n be ma intained in either direction.


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BBE VALVE DIVISION

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VALVE CODE 85 AND 89

STANDARDMATERIALS

PART. Denomination CARBON STEEL ALLOY STEEL STAINLESS STEEL

1 B ODY AS TM A 216 WCB AS TM A 217 WC9 AS TM A 351 CF8M

2 B ONNET AS TM A 105 AS TM A 182 F22 AS TM A 182 F316

3 YOKE AS TM A 216 WCB AS TM A 216 WCB AS TM A 216 WCB

4 S TEM AS TM A 182 F6A AS TM A 182 F6A AS TM A 182 F316

5 G LAND AS TM A 182 F6A AS TM A 182 F6A AS TM A 182 F316

6 S EATRING AS TM A105+ S TELLITE AS TM A182F22+ S TELLITE AS TM A351CF8M+ S TELLITE

7 UP P ER WEDG E AS TM A216WC B + S TELLITE AS TM A217WC9+ S TELLITE AS TM A351CF8M+ S TELLITE

7A LOWER WEDG E AS TM A216WC B + STELLITE AS TM A217WC9+ STELLITE AS TM A351CF8M+ STELLITE

9 DIS C AS TM A105+ S TELLITE AS TM A182F22+ S TELLITE AS TM A351CF8M+ S TELLITE

11 YOKE S LEEVE ALUMINIUM-B RONZE ALUMINIUM-B RONZE ALUMINIUM-B RONZE

13 B AC K S EAT AS TM A105+ S TELLITE AS TM A182F22+ S TELLITE AS TM A182F316+ S TELLITE

15 HANDWHEEL C ARB ON S TEEL CARB ON S TEEL CARB ON S TEEL

17 PRESSURE SEAL G ASKET COMPRESSED &B RAIDED G RAPHITE COMPRESSED &B RAIDED G RAPHITE COMPRESSED &B RAIDED G RAPHITE

20 S LEEVE NUT C ARB ON S TEEL CARB ON S TEEL CARB ON S TEEL

22 G LAND NUT AS TM A 194 2H AS TM A 194 2H AS TM A 194 2H

24 YOKE FLANG E C ARB ON S TEEL CARB ON S TEEL CARB ON S TEEL

56 WEDG E S P RING AIS I 302 AIS I 302 AIS I 302

68 INTERMEDIATE PACKING G RAP HITE G RAP HITE G RAP HITE

68A END PAC KING B RAIDED G RAP HITE B RAIDED G RAP HITE B RAIDED G RAP HITE

75 B EARING C OMMERCIAL COMMERCIAL COMMERCIAL

80 DIS C RETAINER AS TM A515G r70 AS TM A182F6A AS TM A182 F316

87 S P RING WAS HER AIS I 304 AIS I 304 AIS I 304

111 YOKE FLANG E CAP S CREW AIS I 4140 AIS I 4140 AIS I 4140

111A B ONNETCAP S CREW AIS I 4140 AIS I 4140 AIS I 4140

118 G LAND RETAINER CAP S CREW AIS I 4140 AIS I 4140 AIS I 4140

125 G LAND FLANG E AS TM A 515 G r 70 AS TM A 515 G r 70 AS TM A 515 G r 70

127 YOKE CLAMP S TUD AS TM A 193 B 7 AS TM A 193 B 7 AS TM A 193 B 7

128 G LAND B OLT AS TM A 193 B 7 AS TM A 193 B 7 AS TM A 193 B 7

129 YOKE CLAMP NUT AS TM A 194 2H AS TM A 194 2H AS TM A 194 2H

129A DIS C RETAINER NUT AS TM A 194 2H AS TM A 194 2H AS TM A 194 2H

132 S PACER RING AS TM A 105 AS TM A 182 F22 AS TM A 182 F316

133 G AS KETRETAINER AS TM A 105 AS TM A 182 F22 AS TM A 182 F316

134 B ONNETRETAINER AS TM A 515 G r 70 AS TM A 515 G r 70 AS TM A 515 G r 70

193 YOKE CLAMP AS TM A 515 G r 70 AS TM A 515 G r 70 AS TM A 515 G r 70

194 G LAND RETAINER AS TM A 515 G r 70 AS TM A 515 G r 70 AS TM A 515 G r 70

195 G REAS E FITTING C OMMERCIAL COMMERCIAL COMMERCIAL

198 WEDG E P IN AIS I 431 AIS I 431 AIS I 431

198A COTTER P IN S TAINLES S S TEEL S TAINLES S S TEEL S TAINLES S S TEEL

Other materials are available on request.

The trim co mpo nents a re: S te m Se at ring s eating s urfac es Disc s s eating surfac es Ba ck seat seating surfac e


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PARALLEL SLIDE GATE VALVE

The pa rallel slide ga te va lves a re a na lternative option of double disc valves,

having s ingle w edg e instea d o f doublewe dg e. The horizonta l spring keeps thediscs in perma nent contac t with the sea trings, assuring tight seal.

Cod e 86: Follow er eye fo r very laminar flow isa vaila ble on req uest.It a voids a ny turbulences a ndminimizes the press ure d rop.

Dimensions and weights are

common with Double Disc Valves.

Explod ed view of the p a rallel slidesys tem, s howing a ll the pa rts involved

in this assembly.

BBE VALVE DIVISION

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48510 Galindo-Vizcaya (Spain)Phone: + 34 94 472 81 31 / 32 / 33Fax: + 34 94 472 81 30

E-mail: [email protected]

Valve Division

Address

Head office,

Factory and Main office Madrid Office48510 Galindo-Vizcaya (Spain) Padilla, 17-1 PlantTel. + 34 94 472 80 00 28006 Madrid (Spain)Fax + 34 94 472 81 74 Tel. + 34 91 423 64 00E-mail: [email protected] Fax + 34 91 423 64 14


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VALVE DIVISION

Documents

Double Disc Gate Valve