Smith valve is a manufacturer of piston, ball and swing check valves. End connections and pressure classes from 150 through 2500 are available in all types. Choose from body materials of A105, LF2, F11, F5, F22, F9,  316/316L,  304/304L, 316H, 304H, 317/317L, 321, 347, 347H, F51,  F44,  F20,  I825,  I600, and M400. Smith's Class 800 threaded and socketweld check valves include bolted cap piston, spring piston, ball, spring ball and swing types.

Superior provides check valves of carbon/stainless steel, cast bronze, ductile iron, carbon steel, and stainless steel materials. Wafer types have a short pattern style. Silent types have a in-line and threaded style. Single disc configurations are in a swing and wafer style. Dual disc styles feature a wafer design.

Warren Alloy makes several types of check valves to ANDI B16.34 (API600 Wall thickness) specifications, including swing, lift, ball, wafer and inline vertical designs.

Pentair makes non-return check valves, including bolted bonnet and pressure sealed styles which are tested to API 598 specifications. Configurations include RF and RJ t flanged hub, buttweld, and wafer ends, in sizes from 2 to 72" for use in high-pressure or custom applications.

Marcuse & Son is a distributor of heavy-duty, brass-in-tank check valves that feature a rating ranging from 250 psi to 500 psi.

Industrial Valve Suppliers offers check valves used in controlling the flow of fluids in pipes. Types include swing check, diaphragm, clapper, ball type and double check.