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. 794-8353
Mfr. Part No.FIBV246908
$24.60
Each
units
Double 1/8 in BSP Brass 6 bar 1/8in BSP
RS Stock No. 367-9441
Mfr. Part No.222000
$237.57
Each
units
Sight Glass 1/2 in BSPP Brass 3.5 bar 1/2in BSPP
RS Stock No. 794-8381
Mfr. Part No.FLOW230009
$172.15
Each
units
Double 1-1/2 in BSP Female Brass 10 bar 1-1/2in BSP
RS Stock No. 794-8404
Mfr. Part No.FLOW235005
$24.43
Each
units
Single 3/4 in BSP Female Brass 10 bar 3/4in BSP
RS Stock No. 794-8366
Mfr. Part No.FLOW230005
$20.51
Each
units
Double 1/2 in BSP Female Brass 10 bar 1/2in BSP
RS Stock No. 138-5656
Mfr. Part No.340055
BrandSferaco
$20.20
Each
units
Single 3/4 in BSP Female, 3/4 in BSP Male Brass 10 bar 3/4in BSP
RS Stock No. 214-0649
Mfr. Part No.161561066
$266.42
Each
units
Single - PVC-U 16 bar - -
RS Stock No. 794-8410
Mfr. Part No.FLOW235908
$86.72
Each
units
Single 1-1/2 in BSP Female Brass 10 bar 1-1/2in BSP
RS Stock No. 794-8375
Mfr. Part No.FLOW230006
$41.81
Each
units
Double 3/4 in BSP Female Brass 10 bar 3/4in BSP
RS Stock No. 365-6684
Mfr. Part No.293200
$166.76
Each
units
Single 3/4 in BSPP Bronze 14 bar 3/4in BSPP
RS Stock No. 794-8394
Mfr. Part No.FLOW235004
$19.48
Each
units
Single 1/2 in BSP Female Brass 10 bar 1/2in BSP
RS Stock No. 917-1934
Mfr. Part No.445631
$127.86
Each
units
- - Stainless Steel - 3/4in -
RS Stock No. 214-0611
Mfr. Part No.161561064
$176.81
Each
units
Single - PVC-U 16 bar 1in -
RS Stock No. 794-8378
Mfr. Part No.FLOW230907
$75.64
Each
units
Double 1 in BSP Female Brass 10 bar 1in BSP
RS Stock No. 365-6690
Mfr. Part No.293300
$247.04
Each
units
Single 1 in BSPP Bronze 14 bar 1in BSPP
RS Stock No. 794-8397
Mfr. Part No.FLOW235002
$22.27
Each
units
Single 22 mm BSP Female Brass 10 bar 22mm BSP
RS Stock No. 794-8362
Mfr. Part No.FLOW230004
$61.10
Each
units
Double 28 mm BSP Female Brass 10 bar 28mm BSP
RS Stock No. 794-8388
Mfr. Part No.FLOW235001
$14.10
Each
units
Single 15 mm BSP Female Brass 10 bar 15mm BSP
RS Stock No. 794-8384
Mfr. Part No.FLOW230910
$233.94
Each
units
Double 2 in BSP Female Brass 10 bar 2in BSP
RS Stock No. 458-6801
Mfr. Part No.4890 21 21
BrandLegris
$178.85
Each
units
Single 1/2 in G Stainless Steel 40 bar 1/2in G
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