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
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 -
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. 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. 720-9279
BrandRS PRO
SGD148.08
Each
units
Single 1/2 in BSP Stainless Steel 25 bar 1/2in BSP
RS Stock No. 284-2755
BrandRS PRO
SGD578.83
Each
units
Single 2 in BSPT Bronze 25 bar 2in BSPT
RS Stock No. 178-0060
Mfr. Part No.2224110
BrandWatts
SGD10.89
Each
units
- 3/4 in Brass 10 bar - -
RS Stock No. 510-3722
BrandRS PRO
SGD38.52
Each
units
Single 1/2 in BSPT Bronze 20 bar 1/2in BSPT
RS Stock No. 510-3738
BrandRS PRO
SGD178.57
Each
units
Single 2 in BSPT Bronze 20 bar 2in BSPT
RS Stock No. 486-160
BrandRS PRO
SGD32.89
Each
units
Single 1-1/4 in BSPP Brass 12 bar 1-1/4in BSPP
RS Stock No. 510-3788
BrandRS PRO
SGD48.07
Each
units
Single 3/4 in BSPT Bronze 20 bar 3/4in BSPT
RS Stock No. 340-3339
BrandRS PRO
SGD54.23
Each
units
Single 1-1/2 in BSP Brass 16 bar 1-1/2in BSP
RS Stock No. 499-2638
BrandRS PRO
SGD86.11
Each
units
Single 3/4 in BSP Stainless Steel 14 bar 3/4in BSP
RS Stock No. 794-8384
Mfr. Part No.FLOW230910
SGD214.11
Each
units
Double 2 in BSP Female Brass 10 bar 2in BSP
RS Stock No. 510-3744
BrandRS PRO
SGD139.03
Each
units
Single 1-1/2 in BSPT Bronze 20 bar 1-1/2in BSPT
RS Stock No. 896-8355
Mfr. Part No.1/4SCV
BrandJohn Guest
SGD117.74
1 Bag of 10
Bag(s)
Single 1/4 in Push Fit Acetal Copolymer 10 bar - -
RS Stock No. 284-2727
BrandRS PRO
SGD291.17
Each
units
Single 1 in BSPT Bronze 25 bar 1in BSPT
RS Stock No. 282-0828
BrandRS PRO
SGD126.11
Each
units
Single 1/2 in BSPT Bronze 25 bar 1/2in BSPT
RS Stock No. 365-6690
Mfr. Part No.293300
SGD210.14
Each
units
Single 1 in BSPP Bronze 14 bar 1in BSPP
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. 365-6684
Mfr. Part No.293200
SGD143.98
Each
units
Single 3/4 in BSPP Bronze 14 bar 3/4in BSPP