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庫存編號 794-8397
製造零件編號FLOW235002
HK$110.20
單位
Single 22 mm BSP Female Brass 10 bar 22mm BSP
RS庫存編號 794-8388
製造零件編號FLOW235001
HK$70.49
單位
Single 15 mm BSP Female Brass 10 bar 15mm BSP
RS庫存編號 794-8394
製造零件編號FLOW235004
HK$101.96
單位
Single 1/2 in BSP Female Brass 10 bar 1/2in BSP
RS庫存編號 458-6788
製造零件編號4890 13 13
BrandLegris
HK$628.48
單位
Single 1/4 in G Stainless Steel 40 bar 1/4in G
RS庫存編號 720-9336
BrandRS PRO
HK$598.05
單位
Sight Glass 1/2 in BSP Brass 12 bar 1/2in BSP
RS庫存編號 720-9320
BrandRS PRO
HK$896.01
單位
Sight Glass 1/2 in BSP Bronze 10 bar 1/2in BSP
RS庫存編號 214-0605
製造零件編號161561063
HK$725.72
單位
Single 3/4 in Socket PVC-U 16 bar 3/4in -
RS庫存編號 696-4708
BrandConvac
HK$4,946.53
單位
- - - - - -
RS庫存編號 340-3339
BrandRS PRO
HK$234.19
單位
Single 1-1/2 in BSP Brass 16 bar 1-1/2in BSP
RS庫存編號 486-209
BrandRS PRO
HK$57.88
單位
Single 1/2 in BSPP Brass 16 bar 1/2in BSP
RS庫存編號 720-9282
BrandRS PRO
HK$702.90
單位
Single 1 in BSP Stainless Steel 25 bar 1in BSP
RS庫存編號 794-8375
製造零件編號FLOW230006
HK$209.61
單位
Double 3/4 in BSP Female Brass 10 bar 3/4in BSP
RS庫存編號 794-8378
製造零件編號FLOW230907
HK$382.84
單位
Double 1 in BSP Female Brass 10 bar 1in BSP
RS庫存編號 917-1934
製造零件編號445631
HK$634.42
單位
- - Stainless Steel - 3/4in -
RS庫存編號 794-8381
製造零件編號FLOW230009
HK$936.67
單位
Double 1-1/2 in BSP Female Brass 10 bar 1-1/2in BSP
RS庫存編號 720-9349
BrandRS PRO
HK$762.52
單位
Sight Glass 1 in BSP Brass 12 bar 1in BSP
RS庫存編號 794-8410
製造零件編號FLOW235908
HK$456.73
單位
Single 1-1/2 in BSP Female Brass 10 bar 1-1/2in BSP
RS庫存編號 794-8366
製造零件編號FLOW230005
HK$97.83
單位
Double 1/2 in BSP Female Brass 10 bar 1/2in BSP
RS庫存編號 486-205
BrandRS PRO
HK$126.01
單位
Single 1 in BSPP Brass 16 bar 1in BSP
RS庫存編號 458-6794
製造零件編號4890 17 17
BrandLegris
HK$772.31
單位
Single 3/8 in G Stainless Steel 40 bar 3/8in G