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Gate Valve

Gate Valve Manufacturers in Ahmedabad

Gate Valve (Cast Steel Bolted Bonnet Valves)

Design

Cast steel Gate Valve has been designed to conform to API 600.BS1414, and ASME B 16.34. Wall thickness dimensions comply with API 600. Face to face, end to end, and center to face dimensions of flanged and butt welded valves are in accordance with ASME B16.10 BS 2080, and ISO 5752. End flange dimension conform to ASME B16.5 for sizes NPS 24 and smaller, ASME B16.47 series A for sizes NPS 26 and larger. BW end dimension conform to ASME B16.25. Inspection and test are in accordance with API 598 and BS EN 12266.

Body and Bonnet
Castings are precisely machined. The gasket contacting surface is smooth finish that has a roughness between Ra 3.2 and 6.3 micrometer (125-250microinch). The surface roughness of gasket grooves of ring joint faces do not exceed 63 micro inch. Body seat construction of cast steel Gate Valves has three types: threaded seat ring, welded seat ring and integral seat ring. Provided with bosses for optional by-passes or drains.
 
Stem
Non-rotating stem with precision Acme threads and burnished finish. Double Acme for faster operation. All wedge gate valves are provided with upset forged T-head stems. 16 to 32 RMS stem surface finish, straightness and roundness are precisely controlled according to design and manufacturing standards.
 
Stuffing Box
Maximum 125 RMS surface finish. Cylindricity and verticality are precisely controlled according to design and manufacturing standards. Optional lantern rings and grease injectors are available.
 
Gland and Packing
Gland has a two-piece construction for easy alignment. Middle rings die formed 100% laminated flexible graphite rings, top and bottom rings lattice braided graphite fiber with corrosion inhibitor.
 
Bonnet Gasket
Class 150: Jacketed graphite with stainless steel. Class 300 Class 600 : Jacketed graphite with stainless steel or Spiral wound graphite with stainless steel. Class 900 and over: Ring joint metal gasket.
 
Bonnet Bolting
Coarse thread series for bolt sizes 1 inch and smaller,8-thread series for bolt sizes 11/8 inch and larger, both conform to Class 2A/2B tolerances.
 
Operators
Gate valve normally are to be supplied to complete with the suitable hand wheel. An available with gear, electric motor actuators, or cylinder actuators for remote operation. All valve with hand-wheels operator, including those on gear operators, be marked "open" or "close" with an arrow indicating the direction of rotation. Under maximum differential pressure, maximum allowable Rim Pull is 350N.
Salient Features
Features
Face to face and End to end dimension :
36" and smaller to ASME B 16.10, 40" and larger to manufacture's standard
   
Flange Dimension:
24" and smaller to ASME B 16.5, 28" and larger to ASME B 16.47 series A
   
Shell Wall Thickness:
24" and smaller to API 600, 28" and larger to manufacture's standard
   
B.W. end to ASME B 16.25
8" and smaller valves have a one-piece bonnet and yoke design 10" and larger valves have a two-piece bonnet and yoke design
   
Body
Robustly designed to withstand stringent duty conditions, Smoothly configurated to reduce turbulence.
   
Long and Accurate Guides:
Optionally tolerance for free movement of wedge in flow path and retaining leak tightness even in fluctuating line conditions.
   
Superfinish Seating Faces :
High accuracy and super finish by lapping of body ring and wedge seat faces, guarantee zero leak and reduce operational torque.
   
Gate Valve Manufacturers in Ahmedabad
Deep Stuffing Box:
Facilitates extra number of gland packings and ensures pressure tightness and long packing life, can be repacked while valve is back seated.
   
Spindle-Wedge:
T-SLOT is housed in the wedge in such a manner to improve transmission efficiency of torque from spindle to wedge and ensure leak tightness. The solid flexible wedges fitted in Gate Valves are Cast Steel having 13% chrome welded seat facings, machined with extreme accuracy and finally ground and lapped to a mirror finish to secure no-leak conditions and to minimise the risk of galling.
   
Quality:
COMMITTED WITH DEDICATION.
   
Inspection:
Third party inspection by any registered agency
   
TEST PRESSURE-PSI
Hydrostatic Class 150 Class 300 Class 400 Class 600 Class 900 Class 1500 Class 2500
Body 450 1122 1450 2175 3250 5400 9000
Seat 315 825 1060 1600 2400 4000 6000
 
Notes for Gate Valve
The standard Body / Bonnet material is of Cast Steel to ASTM A 216 Gr. WCB. Body- Bonnet in in grades LCB/C-5/WC-6/WC-9/CF-8/CF-8M/CF-3/ CF-3M Etc. Trim : 304/316/Stellite Etc. Available to suit requirements.
   
Yoke will be provided from size 8" and onwards.
   
To facilitate operation, all heavy duty valves have Yoke Sleeves fitted with Thrust Ball Bearings. In class 150 and 300 Ibs, they are provided from nominal Diameter 14" and onwards. In class 600, 900 and 1500 Ibs. from 6" and onwards.
   
Pressure sealed bonnet available in higher classes on request.
   
Parts List
No. Parts Material
01 Body ASTM A216 Gr.WCB
02 Seat Ring Attached
03 Wedge ASTMA216WCB+13Cr
04 Stem S.S. 410
05 Gasket Spiral wound SS 304 CAF/ Graphite
06 Bonnet Bolt ASTM A193 Gr.B7
07 Bonnet Nut ASTM A194 Gr.2H
08 Bonnet ASTM A216 Gr.WCB
09 Backseat ASTM A276 410
10 Packing Graphite
11 Pin C.S.
12 Gland Bolt ASTM A193 Gr.B7
13 Gland Nut ASTM A194 Gr.2H
14 Gland M.S. Proplyn
15 Gland Flange ASTM A216 Gr.WCB
16 Stem Nut M.S.
17 Retaining Nut M.S.
18 Handwheel S.G. Iron
19 H.W. Lock Nut M.S.
20 Lubricator Assem.
Applicable Standards
  API BS DIN
PRESSURE TEMPERATURE ANSI-B 16.5 1560 2401
RATING ANSI-B 16.34 - -
END TO END DIMENSION ANSI-B 16.10 2080 3202
FLANGES ANSI-B 16.5 1560 2543
B W ENDS ANSI-B 16.25 - 2544
  - - 2545
INSPECTION & TESTING API -598 5146/ 3230
  - 6755 P.I.  
 
 
Class 150 150# Gate Valve
NOM.
SIZE		 40
mm		 50
mm		 65
mm		 80
mm		 100
mm		 125
mm		 150
mm		 200
mm		 250
mm		 300
mm		 400
mm
L 165 178 191 203 229 254 267 292 330 365 406
D 127 152.4 177.8 190.5 229 254 279.4 342.9 406.4 482.6 591.9
T 17.5 19 22.2 23.8 23.8 23.8 25.4 28.6 30.2 31.7 36.7
H 340 368 418 441 514 578 660 826 991 1148 1341
H1 378 419 492 518 616 705 812 1076 1076 1453 1743
(All dimensions in mm)
Class 300 300# Gate Valve
NOM.
SIZE		 40
mm		 50
mm		 80
mm		 100
mm		 125
mm		 150
mm		 200
mm		 250
mm		 300
mm		 400
mm
L 191 216 283 305 381 403 419 457 502 838
D 156 165 210 254 279.4 318 381 445 521 647.7
T 21 22 29 32 35 37 41 48 51 57.1
H 381 395 451 527 629 695 852 1023 1178 1387
H1 419 446 531 629 756 847 1055 1277 1483 1794
(All dimensions in mm)
Class 400 400# Gate Valve
NOM.
SIZE		 40
mm		 50
mm		 80
mm		 100
mm		 125
mm		 150
mm		 200
mm		 250
mm		 300
mm		 400
mm
L 241 292 330 356 406 457 495 597 673 762
D 155.6 165.1 190.5 209.5 254 279.4 317.5 381 44.45 521
T 22.2 25.4 23.6 31.8 35 38.1 41.2 47.8 53.8 57.15
H 390 430 500 530 580 640 750 925 1080 1210
H1 435 490 570 615 690 785 910 1138 1345 1525
(All dimensions in mm)
Class 600 600# Gate Valve
NOM.
SIZE		 40
mm		 50
mm		 65
mm		 80
mm		 100
mm		 125
mm		 150
mm		 200
mm		 250
mm		 300
mm
L 241 292 330 356 432 508 559 660 787 838
D 155.6 165.1 190.5 209.5 273 330.2 355.6 419.1 508 558.8
T 22.2 25.4 28.6 31.7 38.1 44.4 47.6 55.6 63.5 66.7
H 412 480 500 581 658 686 845 1010 1165 1310
H1 464 549 580 667 781 832 1015 1246 1427 1620
(All dimensions in mm)
Class 900 900# Gate Valve
NOM.
SIZE		 40
mm		 50
mm		 65
mm		 80
mm		 100
mm		 125
mm		 150
mm		 200
mm		 250
mm		 300
mm
L 305 368 419 381 457 559 610 737 838 965
D 177.8 215.9 244.5 241.3 292.1 349.2 381 469.9 546.1 609.6
T 31.7 38.1 41.3 38.1 44.4 50.8 55.6 63.5 69.8 79.4
H 520 550 605 615 760 810 950 1102 1248 1375
H1 562 603 670 798 870 945 1110 1305 1501 1672
(All dimensions in mm)
Class 1500 1500# Gate Valve
NOM.
SIZE		 40
mm		 50
mm		 65
mm		 80
mm		 100
mm		 125
mm		 150
mm		 200
mm		 250
mm		 300
mm
L 305 368 419 470 546 673 705 832 991 1130
D 177.8 215.9 244.5 266.7 311.1 374,6 393.7 482.6 584.2 673.1
T 31.7 38.1 41.3 47.6 54 73.0 82.5 92.1 107.9 123.8
H 520 550 605 710 770 780 980 1140 1330 1450
H1 562 608 670 790 872 907 1127 1330 1564 1778
(All dimensions in mm)
 

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