Material:Carbon Steel (WCB, WCC for strength), Stainless Steel (SS304, SS316 for corrosion resistance), Cast Iron
Size Range:DN50-DN800
Connection Options:Flanged, Threaded (NPT, BSP), Butt Weld, Socket Weld
Working Pressure:Class 150 to Class 2500
Working Temperature:-29°C to 425°C
Sealing Options:Metal-to-Metal, Resilient Seat, Graphite, PTFE
Manufacturing Method:Cast, Forged, Machined
Applicable Medium:Water, Oil, Gas, Steam, Chemical Fluids
Manufacturing Standard:API 600, API 602, ASME B16.34
The Self-Sealing Power Station Gate Valve is designed specifically for high-pressure, high-temperature applications commonly found in power stations and industrial facilities. Its self-sealing design leverages the internal pressure to enhance the seal, ensuring reliable shut-off performance even in extreme conditions. This valve is made from high-strength materials and is built to meet rigorous industry standards, providing dependable operation in critical applications.
elf-Sealing Mechanism: Utilizes internal pressure to enhance the seal, improving leak-tightness as pressure increases.
High Durability: Constructed from materials like chrome molybdenum steel, ensuring resistance to high pressure and temperature.
Reliable Shut-Off: Gate design provides full, unimpeded flow when open, with tight sealing when closed, suitable for demanding applications.
Minimal Pressure Drop: Full bore design allows for efficient flow without significant pressure loss.
Extended Service Life: Designed for longevity in harsh conditions with corrosion and wear-resistant materials.
Structural Length Standard:
According to ASME B16.10, DIN 3202, BS EN 558
Connection Forms Standards:
Flanged per ASME B16.5, Threaded (NPT, BSP) per ANSI/ASME B1.20.1, Butt Weld per ASME B16.25, Socket Weld per ASME B16.11
Available Sizes (Caliber):
2″, 3″, 4″, 6″, 8″, 10″, 12″, 14″, 16″, 18″, 20″, 24″
Pressure-Temperature Rating:
Class 150, 300, 600, 900, 1500 as per API 600 and ASME B16.34
Pressure Range:
Up to 2,500 psi depending on size and material
Temperature Range:
-29°C to 425°C depending on material and sealing options
| Nominal pressure（Lb) | Strength test | Water seal test | Gas seal test | |||
| MPa | Lbf/in2 | MPa | Lbf/in2 | MPa | Lbf/in2 | |
| 150 | 3.1 | 450 | 2.2 | 315 | 0.6 | 60 |
| 300 | 7.8 | 1125 | 5.6 | 815 | 0.6 | 60 |
| 600 | 15.3 | 2225 | 11.2 | 1630 | 0.6 | 60 |
The main part material
| Body, bonnet, gate | WCB | 1Cr18Ni9Ti | CF8(304) | CF3(304L) | 1Cr18Ni12Mo2Ti | CF8M(316) |
| Sealing surface | Cr13 or cemented carbide | Body (W) or cemented carbide (Y) | ||||
| Stem and inner parts | 2Cr13 | 1Cr18Ni9Ti | 0Cr19Ni9(304) | 00Cr19Ni11(304L) | 1Cr18Ni12Mo2Ti | 0Cr17Ni12Mo2(316) |
| filler | Flexible graphite | |||||
| Gasket | Stainless steel spiral wound gasket | |||||
| Suitable media | Water, steam, oil and so on | Nitric acid and other corrosive media | Strong oxidizing media | Acetic acid and other corrosive media | ||
| proper temperature | -29~425℃ | -40~500℃ | ||||
The main shape and connection dimensions
| Nominal diameter | The main dimensions and connection dimensions | |||||||
| L | D | D1 | D2 | b | Z-d | H | D0 | |
| 150LB | ||||||||
| 50 | 178 | 150 | 120.5 | 92 | 16 | 4-Φ19 | 323 | 200 |
| 65 | 190 | 180 | 139.5 | 105 | 18 | 4-Φ19 | 347 | 250 |
| 80 | 203 | 190 | 152.5 | 127 | 19 | 4-Φ19 | 383 | 250 |
| 100 | 229 | 230 | 190.5 | 157 | 24 | 8-Φ19 | 457 | 300 |
| 125 | 254 | 255 | 216 | 185.7 | 24 | 8-Φ22 | 632 | 300 |
| 150 | 267 | 280 | 241.5 | 216 | 26 | 8-Φ22 | 635 | 350 |
| 200 | 292 | 345 | 298.5 | 270 | 29 | 8-Φ22 | 762 | 350 |
| 250 | 330 | 405 | 362 | 324 | 31 | 12-Φ25 | 895 | 400 |
| 300 | 356 | 485 | 432 | 381 | 32 | 12-Φ25 | 1080 | 500 |
| 350 | 381 | 535 | 476 | 413 | 35 | 12-Φ29 | 1295 | 600 |
| 400 | 406 | 595 | 540 | 470 | 37 | 16-Φ29 | 1435 | 600 |
| 300LB | ||||||||
| 50 | 216 | 165 | 127 | 92 | 22 | 8-19 | 330 | 250 |
| 65 | 241 | 190 | 149 | 105 | 25 | 8-22 | 368 | 250 |
| 80 | 283 | 210 | 168.5 | 127 | 29 | 8-22 | 394 | 300 |
| 100 | 305 | 255 | 200 | 157 | 32 | 8-22 | 473 | 300 |
| 125 | 381 | 280 | 235 | 186 | 35 | 8-22 | 660 | 350 |
| 150 | 403 | 320 | 270 | 216 | 37 | 12-22 | 711 | 350 |
| 200 | 419 | 380 | 330 | 270 | 41 | 12-25 | 813 | 400 |
| 250 | 457 | 445 | 387.5 | 324 | 48 | 16-29 | 1003 | 500 |
| 300 | 502 | 520 | 451 | 381 | 51 | 16-32 | 1137 | 600 |
| 350 | 762 | 585 | 514.5 | 413 | 54 | 20-32 | 1489 | 600 |
| 400 | 838 | 650 | 571.5 | 470 | 57 | 20-32 | 1581 | 650 |
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