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

Delta Pacific Valve manufactures dual-plate, wafer check valves suitable for installation between ASME B16.5 flanges. Six different classes of check valves are available.

Haskel manufactures and distributes a range of high press valves - including stainless steel check valves - for pressure and flow-generating equipment.

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

O'Keefe Control Co. produces ball-type check valves suitable for use with liquids or gases. The check valves are available in three sizes: 10-32, 1/8" NPT and 1/4" NPT.

PVI manufactures and designs a series of vacuum check valves that allow high vacuum flow in one direction while preventing return flow in the other direction. The check valves can also be used as non-return values for maintaining vacuum in vessels.

OPW distributes Midland check valves capable of providing flow rates up to 37,000lbs per hour, in conjunction with high flow disturbance sensitivity. These features aid operators in achieving safe operations and faster unloading times.

Makalu supplies check valves such as swing check valves, lift check valves, wafer type and dual plate valves and wafer type and single plate valves. Swing check valves incorporate a bolted bonnet, swing or lift type, renewable seat rings, integral seat rings, and flanged ends for horizontal or vertical lines. Wafer type, dual plate valves feature NBR, EPDM, Viton, and metal to metal seat, body materials of cast iron, ductile iron, stainless steel and carbon steel, and a size range from 2 to 24 inches. Wafer type, single plate valves feature NBR, EPDM, and Viton seat, body materials of cast iron, ductile iron, stainless steel and carbon steel, stainless steel disc, and a size range from 2 to 24 inches.

Tiangong Valve Co. manufactures check valves for chemical, fire control, oil refining, power plant and metallury applications.

Offering a wide variety of aspetic and sanitary valves, Aomi Valves provides check valves for stainless steel piping systems to prevent backflow.

Hammond Valve manufactures a wide array of check valves, including commercial bronze gate check valves, cast steel gate check valves, industrial iron gate check valves and more. Iron gate, globe & check valves are available in sizes 2" - 24" and in 125 & 250 lb. classes. Materials of construction include IBBM, all iron and 3% nickel.

Doering manufactures a full line of regular check valves and POC check valves including fire resistant models, air pilot NC models, manually-operated hex base check valves and more in a variety of sizes. Doering also offers several housing options including line mount and panel mount configurations.

Schutte & Koerting is a manufacturer of a wide array of industrial components include a full line of check vvalves. Schutte & Koerting check valves are designed to prevent backflow in steam and water lines to protect valuable equipment from damage. Used in extraction lines from steam turbines to feedwater heaters, heating systems or process equipment, these valves are engineered for exceptional reliability.

Circle Valve Technologies, Inc. is a distributor of valve products from a variety of manufacturers. Available products include a variety of check valves with operating pressures up to 10000 psig.