API International distributes double door check valves in sizes ranging from 2 inches to 32 inches. These double check valves can be installed vertically or horizontally, and are used in HVAC, water supply and sewage, chemical/processing, power and utilities, pulp and paper, ship building, and hot air system applications. Double door check valves feature quick spring action that prevents back-flow, eliminates water hammering, and provides minimal head loss.

Febco manufactures double check valves that feature maximum working pressures of 175 psi and are available in sizes ranging from 2-1/2" to 10", 1/2" to 2", or 2-1/2" to 3". These double check valves feature a ductile iron, bronze or lead-free bronze bodies. Depending on series, double check valves also feature union end ball valves, a larger or smaller diameter, an in-line design, or threaded ball valve end connections.

Watts manufactures double check valves in a number of sizes including 2-1/2" to 10", 2-1/2" to 6", 2-1/2" to 12" 1/2" to 1", 1/2" to 3", and 1/2" to 2". These double check valves include lead free, cast iron, bronze and stainless steel types, and are used to protect drinking water supplies from cross connections in non-health hazard applications.

Colton Industries manufactures double door check valves with cast iron wafer, carbon steel, or stainless steel bodies. The cast iron wafer double door check valves are available in 2" to 24" sizes and feature maximum operating pressures of 125 psi or 175 psi. The 2" to 36" carbon steel double door check valves are available in wafer, lug or double-flanged body styles, and maximum operating pressure up to 6250 psig.

Flomatic manufactures double check valves in sizes ranging from 2-1/2" to 10" or from 3/4" to 2". Various double check valves feature 175 psi, temperature of 140F or 180F, and a ductile iron or unleaded bronze body. All the double check valves feature stainless steel springs, silicone discs, and are used to prevent the backflow of pollutants or contaminated water.

Apollo Valves manufactures double check valve types that feature a bronze, domestic stainless steel, or iron body. The various valves are available in sizes including 3/4" to 2", 2-1/2" to 8", 2-1/2" to 12", 1/2" to 2", and 10". Depending on series, the valves can be heavy-duty, center stem-guided, top entry types; and feature flanged body connections or short grooved body connections.

Simtech USA is a provider of double door check valves in 1" to 24" sizes. Featuring a pressure rating of 150psi, the valves feature EPDM, Buna, Viton, and Teflon seals; IPS plain ends, ANSI 150lb. flanged, NPT threaded, and wafer connections. All the double door check valves feature full port design.

Sure Flow Equipment designs and engineers double door check valves in sizes ranging from 2" to 72". Valve types include flanged, flangeless, lug, butt weld, and hub end; with temperatures from -400F to 1200F. Featuring cast iron, cast steel, stainless steel, and bronze bodies, the valves have pressures of ANSI Class 125, 250, and 150 to 2,500.

Davis Valve manufactures double door check valves in cast iron, cast steel, stainless steel, and steel and stainless alloys. Available in sizes ranging from 2" to 24", the check valves come in wafer, lug, and flanged styles, and in pressure classes of 125, 150, 300, 600, 900, 1500 and 2500.

Spence Engineering develops and manufactures double door check valves that feature pressure up to 1480 psig and temperatures up to 600F. The 2" to 24" check valves have wafer flat face or wafer raised face end connections, and are used in process industry, power industry, chemical industry, oil and gas, metals and mining, water and wastewater, and pulp and paper applications.