Delta Pacific manufactures dual-plate, wafer check valves suitable for installation between ASME B16.5 flanges. Six different classes 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. Products 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. These products 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 37,000 lbs per hour, in conjunction with high flow disturbance sensitivity. Products feature aid operators in achieving safe operations and faster unloading times.

Makalu supplies check valves such as swing, lift, wafer and dual plate, and wafer and single plate configurations. 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.

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

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

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

Doering manufactures a full line of regular and POC check valves including fire resistant models, air pilot NC models, manually-operated hex base types 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, including a full line of check valves. Products are designed to prevent backflow in steam and water lines. Used in extraction lines from steam turbines to feedwater heaters, and heating systems or process equipment.

Circle is a distributor of products from a variety of manufacturers, including check valves with operating pressures up to 10000 psig.

Ives Equipment, Inc. is a provider of process control equipment and services. Available products include standard check valves in addition to other configurations.

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.