Check Valves

Check valves prevent reverse flow of fluids and gases within a pipeline system. They are designed to allow fluid to flow one way through the pipeline. Due to the simple design, check valves generally operate without automation or human interaction and instead rely on the flow velocity of the fluid to open and close.

How do they work?

Check valves are flow sensitive and rely on the line fluid to open and close. The internal disc allows flow to pass forward, which opens the valve. The disc begins closing the valve as forward flow decreases or is reversed, depends on the design. Construction is normally simple with only a few components such as the body, seat, disc and cover.

Check Valve types

There are several types of check valves for just about any application. Some of the more popular types include:
● Ball
● Dual plate
● Double door
● Spring assisted inline
● Nozzle
● Piston or lift
● swing checks

As with other types of valves, speciality check valves can be found for special applications.


Check valves are found in just about any type of facility from industrial plants and homes.

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Description Price Type Connection Body Material Maximum Working Pressure Thread Size Thread Standard
RS Stock No. 214-0598
Mfr. Part No.161561062
£54.61
Each
Units
Single - PVC-U 16 bar 1/2in -
RS Stock No. 214-0611
Mfr. Part No.161561064
£69.71
Each
Units
Single - PVC-U 16 bar 1in -
RS Stock No. 214-0627
Mfr. Part No.161561065
£87.46
Each
Units
Single - PVC-U 16 bar 1 1/4in -
RS Stock No. 214-0605
Mfr. Part No.161561063
£64.78
Each
Units
Single 3/4 in Socket PVC-U 16 bar 3/4in -
RS Stock No. 214-0655
Mfr. Part No.161561067
£143.80
Each
Units
Single - PVC-U 16 bar - -
RS Stock No. 214-0649
Mfr. Part No.161561066
£106.61
Each
Units
Single - PVC-U 16 bar - -