Stainless Steel Check Valves
Stainless steel check valves stop reverse flow automatically in corrosive, hygienic and high-purity systems. They open with forward flow and close when it stops or reverses.
We supply SS304 and SS316 swing, lift, spring-loaded (disc) and dual plate check valves, threaded, wafer and flanged.
Specifications
| Product name | Stainless Steel Check Valve |
|---|---|
| Valve type / design | Swing, lift (piston), spring-loaded disc (wafer / in-line) or dual plate wafer |
| Body material | ASTM A351 CF8 / CF8M / CF3M; A182 F304 / F316; SS spring; PTFE, EPDM or metal seat |
| Size range | ¼" to 12" (DN8 – DN300) |
| Pressure rating | PN16 / PN40; ASME Class 150 / 300; up to 1000 PSI WOG (threaded) |
| End connections | Threaded BSP / NPT, wafer, flanged RF, socket weld |
| Standards | API 594, MSS SP-42, ASME B16.34, API 598 testing |
| Applications | Chemical, water treatment, food, pharma and marine |
Industrial uses
- Pump dischargeNon-return protection on stainless pump sets.
- Water treatment & ROBackflow prevention on high-purity lines.
- Chemical dosingSpring-loaded checks on dosing pump outlets.
- Food & beverageHygienic non-return duty.
- MarineSeawater cooling and ballast lines (SS316).
Frequently asked questions
Which check valve works in any orientation?
Spring-loaded disc (in-line or wafer) check valves close by spring force, so they work horizontally, vertically up or vertically down.
What cracking pressure do spring checks need?
Typically a few hundredths of a bar up to around 0.5 bar depending on the spring. Low-pressure gravity systems need a low-cracking or springless design.
Can I use a check valve on a dosing pump?
Yes, spring-loaded stainless checks are common on dosing lines. Check seat material compatibility with the chemical.