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. 365-6678
Mfr. Part No.293100
SGD92.18
Each
units
Single 1/2 in BSPP Bronze 14 bar 1/2in BSPP
RS Stock No. 365-6707
Mfr. Part No.222300
SGD334.09
Each
units
Single 1/2 in BSPP Bronze 3.6 bar 1/2in BSPP
RS Stock No. 486-233
BrandRS PRO
SGD64.77
Each
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Single 2 in BSPP Brass 12 bar 2in BSPP
RS Stock No. 794-8356
Mfr. Part No.FLOW230001
SGD16.86
Each
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Double 15 mm BSP Female Brass 10 bar 15mm BSP
RS Stock No. 486-205
BrandRS PRO
SGD33.05
Each
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Single 1 in BSPP Brass 16 bar 1in BSP
RS Stock No. 499-2688
BrandRS PRO
SGD279.46
Each
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Single 2 in BSP Stainless Steel 14 bar 2in BSP
RS Stock No. 794-8388
Mfr. Part No.FLOW235001
SGD12.71
Each
units
Single 15 mm BSP Female Brass 10 bar 15mm BSP
RS Stock No. 720-9320
BrandRS PRO
SGD204.15
Each
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Sight Glass 1/2 in BSP Bronze 10 bar 1/2in BSP
RS Stock No. 720-9295
BrandRS PRO
SGD185.54
Each
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Single - Stainless Steel - 40mm -
RS Stock No. 486-221
BrandRS PRO
SGD61.11
Each
units
Single 1-1/2 in BSPP Brass 16 bar 1-1/2in BSP
RS Stock No. 720-9273
BrandRS PRO
SGD183.59
Each
units
Single 3/4 in BSP Stainless Steel 25 bar 3/4in BSP
RS Stock No. 794-8394
Mfr. Part No.FLOW235004
SGD17.84
Each
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Single 1/2 in BSP Female Brass 10 bar 1/2in BSP
RS Stock No. 720-9349
BrandRS PRO
SGD172.06
Each
units
Sight Glass 1 in BSP Brass 12 bar 1in BSP
RS Stock No. 499-2650
BrandRS PRO
SGD115.78
Each
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Single 1 in BSP Stainless Steel 14 bar 1in BSP
RS Stock No. 486-158
BrandRS PRO
SGD17.19
Each
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Single 3/4 in BSPP Brass 12 bar 3/4in BSPP
RS Stock No. 486-164
BrandRS PRO
SGD23.08
Each
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Single 1 in BSPP Brass 12 bar 1in BSPP
RS Stock No. 510-3744
BrandRS PRO
SGD139.03
Each
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Single 1-1/2 in BSPT Bronze 20 bar 1-1/2in BSPT
New
RS Stock No. 215-0285
Mfr. Part No.4892 17 17
BrandLegris
SGD232.73
Each (In a Pack of 2)
units
Single - Stainless Steel 40 bar G3/8 -
RS Stock No. 794-8366
Mfr. Part No.FLOW230005
SGD18.51
Each
units
Double 1/2 in BSP Female Brass 10 bar 1/2in BSP
RS Stock No. 486-211
BrandRS PRO
SGD48.71
Each
units
Single 1-1/4 in BSPP Brass 16 bar 1-1/4in BSP