Titan Flow Control makes a full line of check valves, including short pattern, threaded in-line, swing type, wafer style, global style, and silent center guided styles. These products are made of carbon/stainless steel, cast brass, and ductile iron, in classes of 125, 150, 250, 300, 600, and 900 pounds.

Valcor makes series 520 ASME III excess flow and in-line check valves in ANSI classes 150 to 2500, with features like radiation resistance, stellite or elastomer seats, no leakage, pressure cracking to 1PSID, and more.

Dean Bennett is a supplier of a wide range of brass check valves, including swing types in 1", 1.25", 1.5", and 2" models, 2-hole configurations in sizes from 3/4" to 2",  and specialty styles for submersible pumps made of ductile iron or brass in sizes from 1.25" to 4".

Bucher Hydraulics Ltd sells check valves including guided ball or guided poppet types in screw in cartridge configurations for use in high pressure applications.

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.

Apollo offers bronze and stainless steel check valves. Bronze types come in sizes 1/4" to 3", and are threaded in-line soft seat or ball cone type. Their stainless steel models are threaded in-line as well.

Vernay designs and develops check valves, including duckbill, flapper, umbrella, bi-directional, poppet, V-tip, V-ball, and combinations for whatever your application may be.

American Cast Iron Pipe Company sells American Flow Control check valves, including resilient seated and swing types for use in heavy sludge, water, and raw sewage applications.

American offers bronze and brass check valves, including swing type with threaded or sweat ends, inline spring loaded with threaded ends for vertical or horizontal usage, and swing bronze heavy duty designs.

Jaeco makes ball check valves that feature 316 stainless steel construction, available in spring loaded 2 or 10 psi, usable on metering pumps, temperatures from -15 to 650F, pressures up to 2,500PSI, and also custom configurations.

Spears makes PVC, PP, and CPVC swing check valves in sizes from 3/4 to 8", pressure ratings of 150psi (3/4"-4"), 100 psi (6"), and 70psi (8") with a maximum internal pressure rating for water at 73F. These products are serviceable in-line type with a standard feature drain.

Sauer-Danfoss makes free flow check valves with pressure capabilities of 3-380l/min, up to 350bar. Products are available in reverse or standard flow logic, and drop in styles.

Asahi America makes check valves, such as swing type, with flanged connection in sizes of 3/4" to 8". True union ball designs come in sizes from 1/2" to 2", and single union ball types come in sizes from 3" to 4".

Specialty offers SCV threaded check valves and threaded basic check valves, which are all-purpose spring assisted in-line designs requiring low maintenance and used in varied pressure and temperature applications.

Bonomi offers in-line, stainless steel inline, compact in-line check valves in sizes from 1/2" to 2", low cracking pressures of 1/2 psi, and operational temperatures of 10 to 250 F.