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
TWD7,476.00
Each
units
Single 3/4 in BSPP Bronze 3.6 bar 3/4in BSPP
RS Stock No. 284-2755
BrandRS PRO
TWD13,978.00
Each
units
Single 2 in BSPT Bronze 25 bar 2in BSPT
RS Stock No. 365-6684
Mfr. Part No.293200
TWD2,979.00
Each
units
Single 3/4 in BSPP Bronze 14 bar 3/4in BSPP
RS Stock No. 486-164
BrandRS PRO
TWD481.00
Each
units
Single 1 in BSPP Brass 12 bar 1in BSPP
RS Stock No. 720-9282
BrandRS PRO
TWD4,203.00
Each
units
Single 1 in BSP Stainless Steel 25 bar 1in BSP
RS Stock No. 486-148
BrandRS PRO
TWD276.00
Each
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Single 1/2 in BSPP Brass 12 bar 1/2in BSPP
RS Stock No. 367-9441
Mfr. Part No.222000
TWD4,245.00
Each
units
Sight Glass 1/2 in BSPP Brass 3.5 bar 1/2in BSPP
RS Stock No. 340-3339
BrandRS PRO
TWD1,188.00
Each
units
Single 1-1/2 in BSP Brass 16 bar 1-1/2in BSP
RS Stock No. 284-2711
BrandRS PRO
TWD3,453.00
Each
units
Single 3/4 in BSPT Bronze 25 bar 3/4in BSPT
RS Stock No. 365-6690
Mfr. Part No.293300
TWD4,349.00
Each
units
Single 1 in BSPP Bronze 14 bar 1in BSPP
RS Stock No. 794-8381
Mfr. Part No.FLOW230009
TWD3,286.00
Each
units
Double 1-1/2 in BSP Female Brass 10 bar 1-1/2in BSP
RS Stock No. 720-9305
BrandRS PRO
TWD5,893.00
Each
units
Single - Stainless Steel 40 bar 50mm ANSI
RS Stock No. 458-6794
Mfr. Part No.4890 17 17
BrandLegris
TWD2,977.00
Each
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Single 3/8 in G Stainless Steel 40 bar 3/8in G
RS Stock No. 214-0655
Mfr. Part No.161561067
TWD7,028.00
Each
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Single - PVC-U 16 bar - -
RS Stock No. 720-9291
BrandRS PRO
TWD3,518.00
Each
units
Single - Stainless Steel - 32mm -
RS Stock No. 284-2727
BrandRS PRO
TWD3,867.00
Each
units
Single 1 in BSPT Bronze 25 bar 1in BSPT
RS Stock No. 486-170
BrandRS PRO
TWD275.00
Each
units
Single 3/8 in BSPP Brass 12 bar 3/8in BSPP
RS Stock No. 794-8384
Mfr. Part No.FLOW230910
TWD4,466.00
Each
units
Double 2 in BSP Female Brass 10 bar 2in BSP
RS Stock No. 282-0828
BrandRS PRO
TWD2,355.00
Each
units
Single 1/2 in BSPT Bronze 25 bar 1/2in BSPT
RS Stock No. 794-8378
Mfr. Part No.FLOW230907
TWD1,410.00
Each
units
Double 1 in BSP Female Brass 10 bar 1in BSP