Check valves

Air system check valves are available as single or double check valves.
Single check valves allow air to pass from a single source to its destination, but they won’t let the air travel in the opposite direction.
Double check valves have two supply ports and one delivery port. The supply ports are connected to two different air sources, and the source with the higher air pressure sends air to the delivery port. Double check valves with a shuttle or disc should be installed horizontally.
Check valves are self-activating relief valves that operate entirely by reacting to the flow and pressure generated by the process streams in which they are installed. Also known as one-way directional or non return valves, these devices are designed to allow fluid, air or gases to flow in only one direction and eliminate backflow.
Large and miniature check valves are all non return valves that are employed in a number of industrial, commercial and domestic applications where they are responsible for the safe and consistent downstream flow of a number of materials including water, oxygen, fuel, acids, bases, sludge, slurry and even hazardous waste. Metal and plastic check valves may be used in variable applications. It is important that the material construction be compatible with the chemical composition of the process stream. Relief valves, also known as PVC check valves are popular alongside brass check valves, since they both provide durable devices that can handle both chemical corrosion and constant wear. Selecting the proper valve configuration also helps to eliminate unnecessary wear and improves product longevity. Ball check valves, lift check valves, swing check valves and wafer check valves all allow the continuous downstream flow of materials while blocking upstream contamination. When the differential pressure across the valve is high, spring check valves are used to prevent valve clapping and overflow due to heightened downstream flow. They also protect against strong upstream surges such as water hammers. Double check valves, which use multiple valves in conjunction with one another, may also be employed to reduce wear and further protect against backflow that may otherwise result in pressure surges, cross-contamination and even flooding.
Style:Ball Check Valve,Double Check Valves,Inline Check Valves,Lift Check Valve,Miniature Check Valves,Plastic Check Valves,PVC Check Valve,Relief Valves,Spring Check Valve,Swing Check Valve,Wafer Check Valve

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Showing 1–12 of 23 results