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. 794-8410
Mfr. Part No.FLOW235908
SGD78.18
Each
units
Single 1-1/2 in BSP Female Brass 10 bar 1-1/2in BSP
New
RS Stock No. 215-0283
Mfr. Part No.4892 10 10
BrandLegris
SGD202.20
Each (In a Pack of 2)
units
Single - Stainless Steel 40 bar G1/8 -
RS Stock No. 720-9305
BrandRS PRO
SGD265.32
Each
units
Single - Stainless Steel 40 bar 50mm ANSI
RS Stock No. 138-5656
Mfr. Part No.340055
BrandSferaco
SGD17.96
Each
units
Single 3/4 in BSP Female, 3/4 in BSP Male Brass 10 bar 3/4in BSP
RS Stock No. 284-2727
BrandRS PRO
SGD291.17
Each
units
Single 1 in BSPT Bronze 25 bar 1in BSPT
RS Stock No. 754-987
Mfr. Part No.15DCV
SGD32.73
Each
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Double - POM 12 bar - -
RS Stock No. 486-209
BrandRS PRO
SGD16.04
Each
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Single 1/2 in BSPP Brass 16 bar 1/2in BSP
RS Stock No. 510-3738
BrandRS PRO
SGD178.57
Each
units
Single 2 in BSPT Bronze 20 bar 2in BSPT
RS Stock No. 499-2666
BrandRS PRO
SGD156.70
Each
units
Single 1-1/4 in BSP Stainless Steel 14 bar 1-1/4in BSP
New
RS Stock No. 215-0284
Mfr. Part No.4892 13 13
BrandLegris
SGD207.08
Each (In a Pack of 2)
units
Single - Stainless Steel 40 bar G1/4 -
RS Stock No. 486-211
BrandRS PRO
SGD48.71
Each
units
Single 1-1/4 in BSPP Brass 16 bar 1-1/4in BSP
RS Stock No. 284-2711
BrandRS PRO
SGD157.76
Each
units
Single 3/4 in BSPT Bronze 25 bar 3/4in BSPT
RS Stock No. 284-2755
BrandRS PRO
SGD578.83
Each
units
Single 2 in BSPT Bronze 25 bar 2in BSPT
RS Stock No. 510-3750
BrandRS PRO
SGD83.40
Each
units
Single 1-1/4 in BSPT Bronze 20 bar 1-1/4in BSPT
RS Stock No. 178-0060
Mfr. Part No.2224110
BrandWatts
SGD10.89
Each
units
- 3/4 in Brass 10 bar - -
RS Stock No. 499-2672
BrandRS PRO
SGD226.36
Each
units
Single 1-1/2 in BSP Stainless Steel 14 bar 1-1/2in BSP
RS Stock No. 486-215
BrandRS PRO
SGD21.68
Each
units
Single 3/4 in BSPP Brass 16 bar 3/4in BSP
New
RS Stock No. 215-0281
Mfr. Part No.4890 10 10
BrandLegris
SGD166.995
Each (In a Pack of 2)
units
Single - Stainless Steel 40 bar G1/8 -
RS Stock No. 896-8355
Mfr. Part No.1/4SCV
BrandJohn Guest
SGD107.81
1 Bag of 10
Bag(s)
Single 1/4 in Push Fit Acetal Copolymer 10 bar - -
RS Stock No. 284-2733
BrandRS PRO
SGD239.92
Each
units
Single 1-1/4 in BSPT Bronze 25 bar 1-1/4in BSPT