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. 366-4657
Mfr. Part No.223300
TWD7,875.00
Each
units
Single 3/4 in BSPP Bronze 3.6 bar 3/4in BSPP
New
RS Stock No. 215-0284
Mfr. Part No.4892 13 13
BrandLegris
TWD4,371.00
Each (In a Pack of 2)
units
Single - Stainless Steel 40 bar G1/4 -
RS Stock No. 214-0598
Mfr. Part No.161561062
TWD2,569.00
Each
units
Single - PVC-U 16 bar 1/2in -
RS Stock No. 794-8404
Mfr. Part No.FLOW235005
TWD487.00
Each
units
Single 3/4 in BSP Female Brass 10 bar 3/4in BSP
RS Stock No. 794-8381
Mfr. Part No.FLOW230009
TWD3,435.00
Each
units
Double 1-1/2 in BSP Female Brass 10 bar 1-1/2in BSP
New
RS Stock No. 215-0285
Mfr. Part No.4892 17 17
BrandLegris
TWD4,912.50
Each (In a Pack of 2)
units
Single - Stainless Steel 40 bar G3/8 -
RS Stock No. 365-6707
Mfr. Part No.222300
TWD7,285.00
Each
units
Single 1/2 in BSPP Bronze 3.6 bar 1/2in BSPP
RS Stock No. 214-0605
Mfr. Part No.161561063
TWD2,986.00
Each
units
Single 3/4 in Socket PVC-U 16 bar 3/4in -
RS Stock No. 367-9441
Mfr. Part No.222000
TWD4,473.00
Each
units
Sight Glass 1/2 in BSPP Brass 3.5 bar 1/2in BSPP
RS Stock No. 794-8350
Mfr. Part No.FLOW230002
TWD368.00
Each
units
Double 15 mm BSP Female Nickel Plated Brass 10 bar 15mm BSP
RS Stock No. 794-8410
Mfr. Part No.FLOW235908
TWD1,705.00
Each
units
Single 1-1/2 in BSP Female Brass 10 bar 1-1/2in BSP
RS Stock No. 720-9320
BrandRS PRO
TWD4,451.00
Each
units
Sight Glass 1/2 in BSP Bronze 10 bar 1/2in BSP
RS Stock No. 720-9349
BrandRS PRO
TWD3,752.00
Each
units
Sight Glass 1 in BSP Brass 12 bar 1in BSP
RS Stock No. 284-2727
BrandRS PRO
TWD6,349.00
Each
units
Single 1 in BSPT Bronze 25 bar 1in BSPT
RS Stock No. 499-2672
BrandRS PRO
TWD4,936.00
Each
units
Single 1-1/2 in BSP Stainless Steel 14 bar 1-1/2in BSP
RS Stock No. 510-3750
BrandRS PRO
TWD1,819.00
Each
units
Single 1-1/4 in BSPT Bronze 20 bar 1-1/4in BSPT
RS Stock No. 499-2688
BrandRS PRO
TWD6,093.00
Each
units
Single 2 in BSP Stainless Steel 14 bar 2in BSP
RS Stock No. 214-0649
Mfr. Part No.161561066
TWD5,016.00
Each
units
Single - PVC-U 16 bar - -
RS Stock No. 794-8384
Mfr. Part No.FLOW230910
TWD4,669.00
Each
units
Double 2 in BSP Female Brass 10 bar 2in BSP
RS Stock No. 720-9295
BrandRS PRO
TWD3,853.00
Each
units
Single - Stainless Steel - 40mm -