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
TWD7,091.00
Each
units
Single 3/4 in BSPP Bronze 3.6 bar 3/4in BSPP
RS Stock No. 794-8381
Mfr. Part No.FLOW230009
TWD3,485.00
Each
units
Double 1-1/2 in BSP Female Brass 10 bar 1-1/2in BSP
RS Stock No. 794-8384
Mfr. Part No.FLOW230910
TWD4,474.00
Each
units
Double 2 in BSP Female Brass 10 bar 2in BSP
RS Stock No. 720-9273
BrandRS PRO
TWD2,620.00
Each
units
Single 3/4 in BSP Stainless Steel 25 bar 3/4in BSP
RS Stock No. 340-3317
BrandRS PRO
TWD358.00
Each
units
Single 1 in BSP Brass 16 bar 1in BSP
RS Stock No. 284-2711
BrandRS PRO
TWD3,167.00
Each
units
Single 3/4 in BSPT Bronze 25 bar 3/4in BSPT
RS Stock No. 794-8413
Mfr. Part No.FLOW235909
TWD2,160.00
Each
units
Single 2 in BSP Female Brass 10 bar 2in BSP
RS Stock No. 794-8375
Mfr. Part No.FLOW230006
TWD805.00
Each
units
Double 3/4 in BSP Female Brass 10 bar 3/4in BSP
RS Stock No. 458-6788
Mfr. Part No.4890 13 13
BrandLegris
TWD2,360.00
Each
units
Single 1/4 in G Stainless Steel 40 bar 1/4in G
RS Stock No. 794-8397
Mfr. Part No.FLOW235002
TWD413.00
Each
units
Single 22 mm BSP Female Brass 10 bar 22mm BSP
RS Stock No. 284-2755
BrandRS PRO
TWD10,099.00
Each
units
Single 2 in BSPT Bronze 25 bar 2in BSPT
RS Stock No. 720-9336
BrandRS PRO
TWD2,246.00
Each
units
Sight Glass 1/2 in BSP Brass 12 bar 1/2in BSP
RS Stock No. 794-8350
Mfr. Part No.FLOW230002
TWD360.00
Each
units
Double 15 mm BSP Female Nickel Plated Brass 10 bar 15mm BSP
RS Stock No. 138-5656
Mfr. Part No.340055
BrandSferaco
TWD418.00
Each
units
Double 3/4 in BSP Female, 3/4 in BSP Male Brass 10 bar 3/4in BSP
RS Stock No. 340-3323
BrandRS PRO
TWD464.00
Each
units
Single 1-1/4 in BSP Brass 16 bar 1-1/4in BSP
RS Stock No. 720-9291
BrandRS PRO
TWD2,452.00
Each
units
Single - Stainless Steel - 32mm -
RS Stock No. 794-8388
Mfr. Part No.FLOW235001
TWD267.00
Each
units
Single 15 mm BSP Female Brass 10 bar 15mm BSP
RS Stock No. 794-8356
Mfr. Part No.FLOW230001
TWD360.00
Each
units
Double 15 mm BSP Female Brass 10 bar 15mm BSP
RS Stock No. 499-2650
BrandRS PRO
TWD1,964.00
Each
units
Single 1 in BSP Stainless Steel 14 bar 1in BSP
RS Stock No. 214-0627
Mfr. Part No.161561065
TWD3,830.00
Each
units
Single - PVC-U 16 bar 1 1/4in -