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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Omschrijving Prijs Type Connection Body Material Maximum Working Pressure Thread Size Thread Standard
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Fabrikantnummer4890 17 17
FabrikantLegris
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Single 3/8 in G Stainless Steel 40 bar 3/8in G
RS-stocknr. 720-9273
FabrikantRS PRO
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Single 3/4 in BSP Stainless Steel 25 bar 3/4in BSP
RS-stocknr. 720-9279
FabrikantRS PRO
78,90 €
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Single 1/2 in BSP Stainless Steel 25 bar 1/2in BSP
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Single 1-1/4 in BSPP Brass 16 bar 1-1/4in BSP
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Single 3/4 in BSPP Brass 12 bar 3/4in BSPP
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126,57 €
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Single 1-1/4 in BSPP Brass 12 bar 1-1/4in BSPP
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Single 1 in BSP Stainless Steel 25 bar 1in BSP
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Double 28 mm BSP Female Brass 10 bar 28mm BSP
RS-stocknr. 510-3738
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RS-stocknr. 794-8350
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Double 15 mm BSP Female Nickel Plated Brass 10 bar 15mm BSP
RS-stocknr. 917-1943
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Sight Glass 3/4 in Rp Female Brass 12 bar 3/4in BSP
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