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
TWD8,000.00
Each
units
Single 3/4 in BSPP Bronze 3.6 bar 3/4in BSPP
RS Stock No. 340-3323
BrandRS PRO
TWD774.00
Each
units
Single 1-1/4 in BSP Brass 16 bar 1-1/4in BSP
RS Stock No. 340-3339
BrandRS PRO
TWD1,206.00
Each
units
Single 1-1/2 in BSP Brass 16 bar 1-1/2in BSP
RS Stock No. 499-2688
BrandRS PRO
TWD6,190.00
Each
units
Single 2 in BSP Stainless Steel 14 bar 2in BSP
RS Stock No. 720-9273
BrandRS PRO
TWD3,779.00
Each
units
Single 3/4 in BSP Stainless Steel 25 bar 3/4in BSP
RS Stock No. 486-233
BrandRS PRO
TWD1,435.00
Each
units
Single 2 in BSPP Brass 12 bar 2in BSPP
RS Stock No. 720-9336
BrandRS PRO
TWD3,004.00
Each
units
Sight Glass 1/2 in BSP Brass 12 bar 1/2in BSP
RS Stock No. 214-0611
Mfr. Part No.161561064
TWD3,331.00
Each
units
Single - PVC-U 16 bar 1in -
RS Stock No. 486-158
BrandRS PRO
TWD394.00
Each
units
Single 3/4 in BSPP Brass 12 bar 3/4in BSPP
RS Stock No. 510-3722
BrandRS PRO
TWD853.00
Each
units
Single 1/2 in BSPT Bronze 20 bar 1/2in BSPT
RS Stock No. 284-2727
BrandRS PRO
TWD6,449.00
Each
units
Single 1 in BSPT Bronze 25 bar 1in BSPT
RS Stock No. 365-6690
Mfr. Part No.293300
TWD4,671.00
Each
units
Single 1 in BSPP Bronze 14 bar 1in BSPP
RS Stock No. 499-2672
BrandRS PRO
TWD5,286.00
Each
units
Single 1-1/2 in BSP Stainless Steel 14 bar 1-1/2in BSP
RS Stock No. 486-237
BrandRS PRO
TWD1,107.00
Each
units
Single 1-1/2 in BSPP Brass 12 bar 1-1/2in BSPP
RS Stock No. 896-8355
Mfr. Part No.1/4SCV
BrandJohn Guest
TWD2,323.00
1 Bag of 10
Bag(s)
Single 1/4 in Push Fit Acetal Copolymer 10 bar - -
RS Stock No. 794-8381
Mfr. Part No.FLOW230009
TWD3,682.00
Each
units
Double 1-1/2 in BSP Female Brass 10 bar 1-1/2in BSP
RS Stock No. 794-8388
Mfr. Part No.FLOW235001
TWD297.00
Each
units
Single 15 mm BSP Female Brass 10 bar 15mm BSP
RS Stock No. 510-3766
BrandRS PRO
TWD1,375.00
Each
units
Single 1 in BSPT Bronze 20 bar 1in BSPT
RS Stock No. 754-987
Mfr. Part No.15DCV
TWD805.00
Each
units
Double - POM 12 bar - -
RS Stock No. 510-3738
BrandRS PRO
TWD3,955.00
Each
units
Single 2 in BSPT Bronze 20 bar 2in BSPT