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 486-158
BrandRS PRO
HK$64.60
單位
Single 3/4 in BSPP Brass 12 bar 3/4in BSPP
RS庫存編號 282-0828
BrandRS PRO
HK$546.61
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Single 1/2 in BSPT Bronze 25 bar 1/2in BSPT
RS庫存編號 365-6684
製造零件編號293200
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Single 3/4 in BSPP Bronze 14 bar 3/4in BSPP
RS庫存編號 214-0655
製造零件編號161561067
HK$1,327.15
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Single - PVC-U 16 bar - -
RS庫存編號 794-8384
製造零件編號FLOW230910
HK$1,133.51
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Double 2 in BSP Female Brass 10 bar 2in BSP
RS庫存編號 367-9441
製造零件編號222000
HK$1,050.21
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Single 1/2 in BSPP Brass 3.5 bar 1/2in BSPP
RS庫存編號 138-5657
製造零件編號342055
BrandSferaco
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Single 3/4 in BSP Female, 3/4 in BSP Male Brass 10 bar 3/4in BSP
RS庫存編號 499-2672
BrandRS PRO
HK$842.43
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RS庫存編號 510-3788
BrandRS PRO
HK$198.53
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Single 3/4 in BSPT Bronze 20 bar 3/4in BSPT
RS庫存編號 214-0598
製造零件編號161561062
HK$517.28
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RS庫存編號 794-8362
製造零件編號FLOW230004
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Double 28 mm BSP Female Brass 10 bar 28mm BSP
RS庫存編號 720-9291
BrandRS PRO
HK$652.79
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Single - Stainless Steel - 32mm -
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HK$634.42
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- - Stainless Steel - 3/4in -
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製造零件編號293300
HK$1,075.42
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Single 1 in BSPP Bronze 14 bar 1in BSPP
RS庫存編號 486-170
BrandRS PRO
HK$47.30
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Single 3/8 in BSPP Brass 12 bar 3/8in BSPP
RS庫存編號 720-9349
BrandRS PRO
HK$762.52
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Sight Glass 1 in BSP Brass 12 bar 1in BSP
RS庫存編號 754-987
製造零件編號15DCV
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RS庫存編號 284-2727
BrandRS PRO
HK$852.10
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Single 1 in BSPT Bronze 25 bar 1in BSPT
RS庫存編號 794-8375
製造零件編號FLOW230006
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Double 3/4 in BSP Female Brass 10 bar 3/4in BSP
RS庫存編號 486-160
BrandRS PRO
HK$125.68
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Single 1-1/4 in BSPP Brass 12 bar 1-1/4in BSPP