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. 215-0282
Mfr. Part No.4890 27 27
BrandLegris
MYR928.25
Each
units
Single - Stainless Steel 40 bar G3/4 -
New
RS Stock No. 215-0283
Mfr. Part No.4892 10 10
BrandLegris
MYR591.525
Each (In a Pack of 2)
units
Single - Stainless Steel 40 bar G1/8 -
RS Stock No. 365-6690
Mfr. Part No.293300
MYR724.60
Each
units
Single 1 in BSPP Bronze 14 bar 1in BSPP
RS Stock No. 458-6794
Mfr. Part No.4890 17 17
BrandLegris
MYR473.53
Each
units
Single 3/8 in G Stainless Steel 40 bar 3/8in G
RS Stock No. 794-8410
Mfr. Part No.FLOW235908
MYR269.59
Each
units
Single 1-1/2 in BSP Female Brass 10 bar 1-1/2in BSP
RS Stock No. 340-3339
BrandRS PRO
MYR187.00
Each
units
Single 1-1/2 in BSP Brass 16 bar 1-1/2in BSP
RS Stock No. 282-0828
BrandRS PRO
MYR426.48
Each
units
Single 1/2 in BSPT Bronze 25 bar 1/2in BSPT
RS Stock No. 178-0060
Mfr. Part No.2224110
BrandWatts
MYR37.51
Each
units
- 3/4 in Brass 10 bar - -
New
RS Stock No. 215-0285
Mfr. Part No.4892 17 17
BrandLegris
MYR680.825
Each (In a Pack of 2)
units
Single - Stainless Steel 40 bar G3/8 -
RS Stock No. 499-2638
BrandRS PRO
MYR301.51
Each
units
Single 3/4 in BSP Stainless Steel 14 bar 3/4in BSP
RS Stock No. 720-9305
BrandRS PRO
MYR914.88
Each
units
Single - Stainless Steel 40 bar 50mm ANSI
RS Stock No. 794-8353
Mfr. Part No.FIBV246908
MYR77.71
Each
units
Double 1/8 in BSP Brass 6 bar 1/8in BSP
RS Stock No. 366-4657
Mfr. Part No.223300
MYR1,245.40
Each
units
Single 3/4 in BSPP Bronze 3.6 bar 3/4in BSPP
RS Stock No. 720-9285
BrandRS PRO
MYR294.95
Each
units
Single - Stainless Steel - 15mm -
RS Stock No. 486-160
BrandRS PRO
MYR113.40
Each
units
Single 1-1/4 in BSPP Brass 12 bar 1-1/4in BSPP
New
RS Stock No. 215-0284
Mfr. Part No.4892 13 13
BrandLegris
MYR605.795
Each (In a Pack of 2)
units
Single - Stainless Steel 40 bar G1/4 -
RS Stock No. 499-2666
BrandRS PRO
MYR540.31
Each
units
Single 1-1/4 in BSP Stainless Steel 14 bar 1-1/4in BSP
RS Stock No. 794-8366
Mfr. Part No.FLOW230005
MYR57.23
Each
units
Double 1/2 in BSP Female Brass 10 bar 1/2in BSP
RS Stock No. 510-3788
BrandRS PRO
MYR168.30
Each
units
Single 3/4 in BSPT Bronze 20 bar 3/4in BSPT
RS Stock No. 720-9298
BrandRS PRO
MYR404.31
Each
units
Single - Stainless Steel - 25mm -