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. 486-170
BrandRS PRO
kr 81,67
Each
Units
Single 3/8 in BSPP Brass 12 bar 3/8in BSPP
RS Stock No. 510-3788
BrandRS PRO
kr 286,58
Each
Units
Single 3/4 in BSPT Bronze 20 bar 3/4in BSPT
RS Stock No. 720-9285
BrandRS PRO
kr 501,39
Each
Units
Single - Stainless Steel - 15mm -
RS Stock No. 486-205
BrandRS PRO
kr 197,47
Each
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Single 1 in BSPP Brass 16 bar 1in BSP
RS Stock No. 720-9279
BrandRS PRO
kr 807,17
Each
Units
Single 1/2 in BSP Stainless Steel 25 bar 1/2in BSP
RS Stock No. 340-3317
BrandRS PRO
kr 134,63
Each
Units
Single 1 in BSP Brass 16 bar 1in BSP
RS Stock No. 720-9349
BrandRS PRO
kr 1 008,66
Each
Units
Sight Glass 1 in BSP Brass 12 bar 1in BSP
RS Stock No. 499-2666
BrandRS PRO
kr 925,41
Each
Units
Single 1-1/4 in BSP Stainless Steel 14 bar 1-1/4in BSP
RS Stock No. 499-2672
BrandRS PRO
kr 1 128,41
Each
Units
Single 1-1/2 in BSP Stainless Steel 14 bar 1-1/2in BSP
RS Stock No. 284-2733
BrandRS PRO
kr 1 525,36
Each
Units
Single 1-1/4 in BSPT Bronze 25 bar 1-1/4in BSPT
RS Stock No. 499-2688
BrandRS PRO
kr 1 289,53
Each
Units
Single 2 in BSP Stainless Steel 14 bar 2in BSP
RS Stock No. 720-9291
BrandRS PRO
kr 928,51
Each
Units
Single - Stainless Steel - 32mm -
RS Stock No. 284-2711
BrandRS PRO
kr 842,43
Each
Units
Single 3/4 in BSPT Bronze 25 bar 3/4in BSPT
RS Stock No. 486-182
BrandRS PRO
kr 531,78
Each
Units
Single 2 in BSPP Brass 16 bar 2in BSP
RS Stock No. 486-164
BrandRS PRO
kr 132,22
Each
Units
Single 1 in BSPP Brass 12 bar 1in BSPP
RS Stock No. 720-9282
BrandRS PRO
kr 1 109,46
Each
Units
Single 1 in BSP Stainless Steel 25 bar 1in BSP
RS Stock No. 486-148
BrandRS PRO
kr 85,19
Each
Units
Single 1/2 in BSPP Brass 12 bar 1/2in BSPP
RS Stock No. 720-9305
BrandRS PRO
kr 1 555,52
Each
Units
Single - Stainless Steel 40 bar 50mm ANSI
RS Stock No. 340-3301
BrandRS PRO
kr 86,60
Each
Units
Single 3/4 in BSP Brass 16 bar 3/4in BSP
RS Stock No. 499-2650
BrandRS PRO
kr 683,73
Each
Units
Single 1 in BSP Stainless Steel 14 bar 1in BSP
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