Slab Gate Valve
Slab Gate Valve - Image 2

Slab Gate Valve

A slab gate valve is a critical component in oil and gas pipelines. Its key feature is a single, solid gate that slides between two seat rings to open and close. When open, it provides a full, unobstructed bore, enabling efficient product flow with minimal pressure drop and allowing for pipeline pigging. This design offers reliable, bidirectional sealing, capable of holding pressure from either direction. Renowned for their durability and robust performance in harsh, abrasive environments, slab gate valves are the preferred choice for mainline isolation where a dependable, leak-tight seal is essential.

Category:

Features:

Material: cast steel, stainless steel, duplex SS
Full port design
Outside screw and yoke, OS&Y
BB, bolted bonnet
Parallel single disc with through conduit
Renewable seat rings
Size : 2″ to 40″
Pressure rating: Class 150, Class 300, Class 600, Class 900, Class 1500
Operator: manual hand-wheel, gearbox, electric actuator, pneumatic cylinder

Material List:

No Part Name ASTM Material
Carbon Steel Stainless Steel
1 Blowdown stops A105+Zn A350-LF2 A182-304 A182-F316
2 Body A216-WCB A350-LCB A351-CF8 A351-CF8M
3 Grease injection joint A105+Zn A352-LCB A182-304 A182-F316
4 Disc A105+ENP A352-LCB+ENP A240-304 A240-316
5 Seat A105+PTFE A352-LCB+PTFE A182-F304+PTFE A182-F316+PTFE
6 O-ring NBR
7 Stem A276-420 A182-F304 A182-304 A182-F316S
8 Nut A194-2H A194-4 A194-8 A194-8M
9 Bonnet A216-WCB A352-LCB A351-CF8 A351-CF8M
10 Packing PTFE Graphite Graphite PTFE
11 Yoke A216-WCB A352-LCB A351-CF8 A351-CF8M
12 Handwheel A536-60-40-18
13 Stem nut C95500
14 Gasket Graphite+F304
15 O-Ring NBR

Dimensions:

ANSI Class 150Lb

NPS (inch) DN (mm) L (inch) L (mm) L1 (inch) L1 (mm)
1 25 5 127 5 127
1¼ 32 5.51 140 5.51 140
1½ 40 6.5 165 6.5 165
2 50 7 178 8.5 216
2½ 65 7.48 190 9.5 241
3 80 8 203 11.14 283
4 100 9 229 12 305
6 150 10.51 267 16 403
8 200 11.5 292 16.5 419
10 250 13 330 18 457
12 300 14 356 19.76 502
14 350 15 381 22.52 572
16 400 16 406 24 610
18 450 17 432 26 660
20 500 18 457 28 711
24 600 20 508 32 813
28 700 24 610 36 914
32 800 26 660 38 965
36 900 28 711 40 1016
40 1000 32 811 — —

ANSI Class 300Lb

NPS (inch) DN (mm) L (inch) L (mm) L1 (inch) L1 (mm)
1 25 6.5 165 6.5 165
1¼ 32 7 178 7 178
1½ 40 7.48 190 7.48 190
2 50 8.5 216 8.5 216
2½ 65 9.5 241 9.5 241
3 80 11.14 283 11.14 283
4 100 12 305 12 305
6 150 15.87 403 15.87 403
8 200 16.5 419 16.5 419
10 250 18 457 18 457
12 300 19.76 502 19.76 502
14 350 30 762 30 762
16 400 33 838 33 838
18 450 36 914 36 914
20 500 39 991 39 991
24 600 45 1143 45 1143
28 700 53 1346 53 1346
32 800 60 1524 60 1524
36 900 68 1727 68 1727

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