API stainless steel globe valves are gate valves made of stainless steel (304, 316L, etc., the mainstream models) for the valve body and core components. They control the flow path by raising and lowering the valve disc along the valve seat axis. They adopt a structure of "stainless steel valve body + valve disc + valve stem + drive mechanism (manual/pneumatic/electric)".
Leveraging the corrosion resistance and mechanical strength of stainless steel, they offer advantages such as "resistance to multi-media corrosion", "reliable sealing", and "suitability for clean/harsh working conditions". They comply with API 6D, BS 1873, and ANSI B16.34 standards and are widely used in pipeline systems in chemical, pharmaceutical, food, and water treatment industries where high valve body corrosion resistance and media cleanliness are required.
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API stainless steel globe valves Technical parameters
Material: Stainless Steel (ASTM A351 CF8M, CF8)
Size Range:1/2″-16″
Connection Options:Flanged, Butt-welded, Threaded ends
Working Pressure: Class 150 to Class 1500
Working Temperature:29°C to 427°C
Sealing Options: Metal-to-metal, Soft Seal
Manufacturing Method: Cast Steel
Applicable Medium:water, oil, gas, steam, and various chemicals.
Manufacturing Standard: ASME B16.34, API 602, API 598
| Design and Manufacture | Face to Face | Flange | BW Ends | Pressure-Temperature | Test and Inspection |
| ANSI B16.34 / BS1873 | ANSI B16.10 | ANSI B16.5 | ANSI B16.25 | ANSI B16.34 | API 598 |
API stainless steel globe valves Specification Parameters
Cast steel Globe Valve-Main parts
| Body & Bonnet | Stem | Sealing | Gasket | Packing | Temperature | Applicable Media |
| WCB | 2Cr13 | 13Cr STL | Graphite 13Cr/Graphite 1Cr13/Flexible SFB-2 F304 F316 F304L F316L |
Soft graphite Reinforced flexible graphite SFB/260 SFP/260 PTFE |
≤425 | Water, Steam, Oil |
| WC1 | 38CrMoAl 25Cr2MoV | ≤425 | ||||
| WC6 | ≤540 | |||||
| WC9 | ≤570 | |||||
| C5 C12 | ≤540 | |||||
| CF8 | F304 | ≤200 | Nitric acid, Acetic acid, Urea | |||
| CF8M | F316 | |||||
| CF3 | F304L | |||||
| CF3M | F316L |
API stainless steel gate valve drawings customized for a Mexican customer
API stainless steel gate valve The main shape and connection size
| 150Lb Flange(RF) main dimensions(mm) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| DN (mm) | in | L | D | D1 | D2 | b | n-φd | H | D0 | Weight |
| 15 | 1/2 | 108 | 89 | 60.5 | 35 | 11.2 | 4-16 | 241 | 100 | 6.9 |
| 20 | 3/4 | 117 | 98 | 69.9 | 43 | 12.7 | 4-16 | 241 | 100 | 9.8 |
| 25 | 1 | 127 | 108 | 79.2 | 51 | 14.2 | 4-16 | 242 | 125 | 13.5 |
| 32 | 1 1/4 | 140 | 117 | 89 | 63 | 16 | 4-16 | 280 | 160 | 19.5 |
| 40 | 1 1/2 | 165 | 127 | 98.6 | 73 | 17.5 | 4-16 | 286 | 160 | 28.5 |
| 50 | 2 | 203 | 152 | 120.7 | 92 | 19 | 4-19 | 368 | 200 | 18 |
| 65 | 2 1/2 | 216 | 178 | 139.7 | 105 | 22.4 | 4-19 | 387 | 200 | 30 |
| 80 | 3 | 241 | 190 | 152.4 | 127 | 24 | 4-19 | 411 | 250 | 41 |
| 100 | 4 | 292 | 229 | 190.5 | 157 | 24 | 4-19 | 454 | 250 | 64 |
| 125 | 5 | 356 | 254 | 216.0 | 186 | 24 | 8-22.5 | 455 | 350 | 86 |
| 150 | 6 | 406 | 279 | 241.3 | 216 | 25.4 | 8-22.5 | 541 | 350 | 113 |
| 200 | 8 | 495 | 343 | 298.5 | 270 | 28.4 | 8-22.5 | 651 | 450 | 178 |
| 250 | 10 | 622 | 406 | 362.0 | 324 | 30.2 | 12-25.4 | 800 | 450 | 270 |
| 300 | 12 | 698 | 483 | 431.8 | 381 | 32 | 12-25.4 | 1231 | 600 | 350 |
| 350 | 14 | 787 | 533 | 476.3 | 413 | 35 | 12-29 | 1450 | 600 | 460 |
| 400 | 16 | 914 | 597 | 539.8 | 470 | 36.6 | 16-29 | 1645 | 600 | 590 |
| 300Lb Flange(RF) main dimensions(mm) | ||||||||||
| DN (mm) | in | L | D | D1 | D2 | b | n-φd | H | D0 | Weight |
| 15 | 1/2 | 152 | 95 | 66.5 | 35 | 14.2 | 4-16 | 241 | 140 | 7.7 |
| 20 | 3/4 | 178 | 117 | 82.5 | 43 | 16 | 4-19 | 241 | 140 | 11.3 |
| 25 | 1 | 203 | 123 | 89 | 51 | 17.5 | 4-19 | 283 | 160 | 16.8 |
| 32 | 1 1/4 | 216 | 133 | 98.5 | 63 | 19 | 4-19 | 320 | 200 | 21.2 |
| 40 | 1 1/2 | 229 | 155 | 114.3 | 73 | 20.6 | 4-22.5 | 322 | 200 | 32.6 |
| 50 | 2 | 267 | 165 | 127 | 92 | 22.4 | 8-19 | 399 | 200 | 25 |
| 65 | 2 1/2 | 292 | 190 | 149.4 | 105 | 25.4 | 8-22.5 | 438 | 250 | 30 |
| 80 | 3 | 318 | 210 | 168.1 | 127 | 28.4 | 8-22.5 | 464 | 280 | 35 |
| 100 | 4 | 356 | 254 | 200.2 | 157 | 31.8 | 8-22.5 | 565 | 350 | 56 |
| 125 | 5 | 400 | 279 | 235 | 186 | 35 | 8-22.5 | 614 | 350 | 96 |
| 150 | 6 | 444 | 318 | 269.7 | 216 | 36.6 | 12-25.4 | 717 | 400 | 120 |
| 200 | 8 | 559 | 381 | 330.2 | 270 | 41.2 | 12-25.4 | 930 | 500 | 212 |
| 250 | 10 | 622 | 444 | 387.4 | 324 | 47.8 | 16-28.5 | 1012 | 550 | 330 |
| 300 | 12 | 711 | 521 | 450.8 | 381 | 50.8 | 16-32 | 1231 | 600 | 472 |
| 350 | 14 | 762 | 584 | 514.4 | 413 | 54 | 20-32 | 1450 | 600 | 715 |
| 400 | 16 | 864 | 648 | 571.5 | 470 | 57.2 | 20-35 | 1645 | 600 | 920 |
| 600Lb Flange(RF) main dimensions(mm) | ||||||||||
| DN (mm) | in | L | D | D1 | D2 | b | n-φd | H | D0 | Weight |
| 15 | 1/2 | 165 | 95 | 66.5 | 35 | 14.5 | 4-16 | 285 | 100 | 7.8 |
| 20 | 3/4 | 190 | 117 | 82.5 | 43 | 16 | 4-19 | 285 | 125 | 12.5 |
| 25 | 1 | 216 | 124 | 89 | 51 | 17.5 | 4-19 | 313 | 160 | 17.5 |
| 32 | 1 1/4 | 229 | 133 | 98.5 | 63 | 21 | 4-19 | 328 | 160 | 23.5 |
| 40 | 1 1/2 | 241 | 156 | 114.3 | 73 | 22.5 | 4-22.5 | 365 | 180 | 38.5 |
| 50 | 2 | 292 | 165 | 127 | 92 | 33 | 8-19 | 444 | 200 | 35 |
| 65 | 2 1/2 | 330 | 190 | 149.4 | 105 | 36 | 8-22.5 | 483 | 250 | 50 |
| 80 | 3 | 356 | 210 | 168.1 | 127 | 39 | 8-22.5 | 533 | 250 | 60 |
| 100 | 4 | 432 | 273 | 216 | 157 | 45 | 8-25.4 | 622 | 350 | 110 |
| 125 | 5 | 508 | 330 | 266.7 | 186 | 52 | 8-28.5 | 750 | 350 | 200 |
| 150 | 6 | 559 | 356 | 292.1 | 216 | 55 | 12-28.5 | 800 | 450 | 230 |
| 200 | 8 | 660 | 419 | 349.3 | 270 | 63 | 12-32 | 927 | 500 | 410 |
| 250 | 10 | 787 | 508 | 431.8 | 324 | 71 | 16-35 | 1257 | 600 | 625 |
| 300 | 12 | 838 | 559 | 489 | 381 | 74 | 20-35 | 1468 | 680 | 860 |
API Stainless Steel Gate Valve Working Principle
The stainless steel gate valve uses axial pressure from the valve stem to drive the valve disc to tightly seal against the valve seat, thus blocking the flow of media. Its opening and closing process is as follows:
Opening: Rotate the valve stem (manually or electrically/pneumatically driven), the valve disc rises against the flow direction, and the passage gradually opens.
Closing: Rotate the valve stem in the opposite direction, the valve disc presses down to contact the valve seat, and the sealing surface completely closes.
Media Flow Direction Design:
Nominal pressure PN≤16MPa: The media flows upward from below the valve disc (co-current flow). Closing requires overcoming the media pressure, resulting in a larger operating force.
Nominal pressure PN≥20MPa: The media flows downward from above the valve disc (counter-current flow). Closing requires the media pressure to assist in sealing, reducing the operating force.
API Stainless Steel Gate Valve Structural Characteristics and Advantages
Low Wear Sealing: The valve disc and valve seat sealing surfaces only contact each other when closed. There is no sliding friction during opening and closing, reducing wear on the sealing surface and extending service life.
Forced Sealing Design: Requires sufficient pressure to ensure a tight seal. Suitable for high-pressure environments (up to 16.0 MPa), such as oil, power, and heating pipelines.
Directional Installation: Allows only unidirectional flow of the medium. During installation, strictly follow the flow direction indicated on the valve body (usually "low in, high out") to prevent reverse flow and seal failure.
Optimized Flow Channel Design:
Straight-through: The flow channel is straight, resulting in lower resistance. Suitable for general fluid control.
Angle: The inlet and outlet are at a 90-degree angle, saving space. Commonly used at pipeline bends.
Direct Flow: The valve disc is designed with a streamlined shape to reduce fluid resistance. Suitable for high-flow-rate applications.
API Stainless Steel Gate Valve Applications:
- Chemical and Petroleum Industry: Controls the flow of corrosive media (such as dilute sulfuric acid and nitric acid) and high-temperature, high-pressure fluids (such as steam and oil/gas) to ensure production safety.
Power Industry: Used in cooling water systems to regulate water flow to maintain stable equipment operation and prevent overheating damage.
Water Treatment Engineering: Precisely control water flow in drinking water or wastewater treatment to ensure water quality meets discharge standards and avoids secondary pollution.
- Food and Pharmaceutical Industries:
Food Processing: Transporting liquid raw materials (such as dairy products) requires a pollution-free environment; 304 stainless steel meets hygiene standards.
Pharmaceutical Production: In sterile drug delivery pipelines (such as fermenters and water for injection systems), 316L stainless steel valve bodies prevent corrosion and ensure product safety.
Cryogenic Conditions: Specially designed cryogenic shut-off valves can withstand environments as low as -29°C for the transport of cryogenic fluids such as liquefied natural gas.
API stainless steel gate valve factory
