DFT Inc. manufacturers a wide variety of stainless steel check valves including threaded in-line, wafer style, flanged and threaded stainless steel check valves in a broad selection of sizes and pressure ratings.

Flexi-Hinge offers manufactures stainless still check valves that operate without a spring and will open with 0.10 PSI of pressure and seal with 1/2 PSI of back pressure. Models like the Series 503 flanged check valve feature a maximum operating pressure of 200 PSI and operating temperature range of –100° to +500°.

Innovative Pressure Technologies manufactures coned and threaded valves, fittings and tubing products including stainless steel check valves available in ball seat poppet and soft seat poppet models with max working pressure up to 60,000 PSI for applications in gas, liquid, fluid handling for the chemical, petrochemical, research and oil and gas industries.

Jaeco manufactures ball check valves including a wide array of stainless steel models featuring compact designs, spring-loaded to 2 or 10 PSI, full range of sizes from 1/4" to 1" and usable as injection line valves. These valves have a temperature range of -15° to +650°F and are also offered in custom configurations.

Circle Valve Technologies, Inc. is a distributor of valve products from a variety of manufacturers. Available products include stainless steel check valves such as the 2300 series for high pressure service featuring single piece design, quiet closing and zero leakage design as well as automatic wear compensation and resilient o-ring.