API stainless steel gate valves are designed and manufactured in accordance with American National Standard ANSI B16.34, American Petroleum Institute Standards API 600 and API 6D. Flanged steel gate valves are suitable for use on various pipelines with ANSI Class 150～2500, PN2.0～42.0MPa, JIS10～20K, and operating temperatures of -29～425℃ (carbon steel) and -40～500℃ (stainless steel), for cutting off or connecting the medium in the pipeline.
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API stainless steel gate valves Technical parameters
Size Range:2″ to 48″
Material:Stainless Steel (SS304, SS316)
Connection Options:Flanged
Working Pressure:Class 150 to Class 1500
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
API stainless steel gate valves Production Enforce Standard
| Design and Manufacture | Face to Face / End to End | Flange Dimension | Butt Welding Dimension | Pressure–Temperature Rating | Inspection and Test |
|---|---|---|---|---|---|
| API 6D, API 600 | ANSI B16.10 | ANSI B16.5 | ANSI B16.25 | ANSI B16.34 | API 598, API 6D |
API stainless steel gate valves Main Part Materials and Properties
| Body / Cover / Disc | Stem | Sealing Face | Sealing Shim | Packing | Working Temperature (°C) | Suitable Medium |
|---|---|---|---|---|---|---|
| WCB | 2Cr13 | 13Cr / STL / With body material / PTFE / Nylon | Enhanced Flexible Graphite / 1Cr13 + Flexible Graphite / SFB-2 / 08 Soft Steel / F304 / F316 / F304L / F316L | Flexible Graphite / Enhanced Flexible Graphite / SFB/260 / SFP/260 / PTFE | ≤ 425 | Water / Steam / Oil |
| WC1 | 38CrMoAl/ 25Cr2MoV | ≤ 450 | ||||
| WC6 | ≤ 540 | |||||
| WC9 | ≤ 570 | |||||
| C5 / C12 | ≤ 540 | |||||
| CF8 | F304 | ≤ 600 | Nitric Acid / Acetic Acid / Urea | |||
| CF3 | F316 | |||||
| CF8M | F304L | |||||
| CF3M | F316L |
API stainless steel gate valves Pressure Test
| Nominal Pressure (Lb) | Shell Test | Water Seal Test | Air Seal Test | |||
|---|---|---|---|---|---|---|
| MPa | Lbf/in² | MPa | Lbf/in² | MPa | Lbf/in² | |
| 150 | 3.1 | 450 | 2.2 | 315 | 0.5–0.7 | 60–100 |
| 300 | 7.8 | 1125 | 5.6 | 815 | 0.5–0.7 | 60–100 |
| 600 | 15.3 | 2225 | 11.2 | 1630 | 0.5–0.7 | 60–100 |
| 900 | 23.1 | 3350 | 16.8 | 2440 | 0.5–0.7 | 60–100 |
| 1500 | 38.4 | 5575 | 28.1 | 4080 | 0.5–0.7 | 60–100 |
| 2500 | 64.6 | 9367 | 47.4 | 6873 | 0.5–0.7 | 60–100 |
Structural Features and Advantages
Sealing Reliability
Utilizing a wedge-type elastic gate structure, it automatically compensates for valve body deformation, ensuring a tight seal and preventing leakage.
The valve seat can be a flip-up design, supporting free combination of sealing surface materials, extending service life.
Ease of Opening and Closing
Medium and large diameter valves (e.g., NPS≥10, pressure rating≥400LB) are equipped with rolling bearings, reducing operating torque and improving opening and closing efficiency.
Multiple drive methods are available, including manual, pneumatic, electric, and bevel gear, to adapt to different operating conditions.
Material Compatibility
Shell Material: ASTM A216 WCB (carbon steel), ASTM A351 CF8/CF8M/CF3 (stainless steel), etc.
Sealing Surface Material: 13Cr, STL (hard alloy), 304/316 stainless steel, etc., meeting the requirements of high pressure, high temperature, and corrosive media.
Packaging and Gaskets: Flexible graphite, reinforced flexible graphite, PTFE, etc., flexibly selected according to operating conditions.
Low fluid resistance. When fully open, the flow is unobstructed, resulting in minimal pressure loss during medium operation. It is suitable for long-distance transportation or applications sensitive to pressure drop.
API stainless steel gate valves Applications
- Chemical Industry: Used for conveying various corrosive chemical raw materials and products, such as sulfuric acid, hydrochloric acid, and sodium hydroxide. Stainless steel gate valves can operate normally in highly corrosive environments, ensuring the safety and stability of chemical production processes.
- Food and Beverage Industry: Widely used in the ingredient preparation and filling stages of beverage production, as well as in pipelines conveying media such as water, steam, and edible oil in food processing. Their excellent hygiene performance effectively prevents contamination of food and beverages, ensuring product quality and safety.
- Pharmaceutical Industry: Used for conveying and controlling various liquids, solvents, and water for injection during pharmaceutical production. Stainless steel gate valves meet the stringent hygiene standards of the pharmaceutical industry, preventing contamination of pharmaceuticals and ensuring their purity and safety.
- Water Treatment Industry: Stainless steel gate valves play a vital role in both industrial wastewater treatment and domestic drinking water treatment. In wastewater treatment, they can be used to treat wastewater containing acids and alkalis; in drinking water treatment, they ensure that the valves do not adversely affect water quality, guaranteeing water supply safety.
- In the construction industry, stainless steel gate valves are widely used in building water supply and drainage systems, hot water supply systems, and air conditioning systems due to their attractive appearance, excellent corrosion resistance, and reliable performance. They can adapt to different water quality conditions, operate stably for extended periods, and reduce maintenance and replacement costs.
