Hydraulic Check Valves

Hydraulic check valves although simple, perform a very important function within a hydraulic system. Check valves allow the free flow of fluid in one direction and block the flow travelling in the opposite direction. Also known as an NRV (non-return valve) these simple devices help eliminate any potential damage caused by fluid backflow pressure. RS Components offer a range of high-quality hydraulic components from leading brands including Parker, Bosch Rexroth and of course RS PRO.

How does a Hydraulic Check Valve work?

Hydraulic check valves have two ports, an inlet port and an outlet port, they are flow sensitive and depend on the fluid to open and close the internal seat. Hydraulic check valves are quite unique, they are one of the only types of valve that does not require any human intervention to operate. Hydraulic check valves are completely self-automated.

Mounting types for Hydraulic Check Valves

Hydraulic check valves are available in two main mounting types. Inline threaded, or CETOP plate mounting.

Hydraulic Inline Threaded Check Valves

In-line check valves can be mounted directly in a hydraulic pipeline. They are typically made from steel or stainless steel with a tough nitrile rubber or nylon seal. Standard BSP threads in sizes ranging from 1/4 inch to 1 inch.

CETOP Mounting Hydraulic Check Valves

These check valves are enclosed in a metal or plastic housing and have a CETOP mounting pattern for modular construction. Available in double-acting or single-acting.

What is Cracking Pressure?

Cracking pressure refers to the minimum pressure differential needed between the inlet and outlet of the valve at which the first indication of flow occurs. When cracking pressure is reached, the valve will open to allow flow, when it drops the valve will close.

What is CETOP?

CETOP stands for Comité Européen des Transmissions Oléohydrauliques et Pneumatiques. CETOP is the European Fluid Power Committee. CETOP is the communications platform for fluid power in Europe. CETOP mounting valves have a standard mounting pattern for modular construction. It ensures that any valves from any manufacturer, providing the CETOP pattern is the same is compatible with each other.


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Description Price Manufacturer Series CETOP Mounting Single/Double Cracking Pressure Maximum Operating Pressure Maximum Flow Rate Minimum Operating Temperature Maximum Operating Temperature Thread Size Connection Port Thread Body Material Mounting Type
RS Stock No. 324-4944
BrandRS PRO
MYR543.76
Each
units
FT257 - - - 400 bar 110L/min -20°C +200°C 1/4in BSP 1/4 Stainless Steel, Steel Inline
RS Stock No. 237-2442
Mfr. Part No.2301
BrandParker
MYR163.01
Each
units
- - - 0.35bar - 20L/min -30°C +90°C 1/4in G 1/4 Steel Inline
RS Stock No. 807-312
Mfr. Part No.EW06LCF
BrandParker
MYR43.94
Each
units
RHZ18 - - - 400 bar - -40°C +120°C 1/2in G 1/2 Steel Inline
RS Stock No. 283-8324
BrandRS PRO
MYR177.60
Each
units
FT260 - - - 350 bar 80L/min -20°C +100°C 3/4in G 3/4 Steel Inline
RS Stock No. 237-2492
Mfr. Part No.2305
BrandParker
MYR621.82
Each
units
- - - 0.35bar - 150L/min -30°C +90°C 1in G 1 Steel Inline
RS Stock No. 237-2470
Mfr. Part No.2303
BrandParker
MYR265.44
Each
units
- - - 0.35bar - 50L/min -30°C +90°C 1/2in G 1/2 Steel Inline
RS Stock No. 324-4972
BrandRS PRO
MYR989.90
Each
units
FT257 - - - 400 bar 90L/min -20°C +200°C 3/4in BSP 3/4 Stainless Steel, Steel Inline
RS Stock No. 134-7044
Mfr. Part No.ZRV-P-01
BrandParker
MYR1,626.23
Each
units
ZRV CETOP 3 Single 0.5bar 350bar 40L/min -20°C +60°C - - - CETOP
RS Stock No. 324-4966
BrandRS PRO
MYR721.00
Each
units
FT257 - - - 400 bar 65L/min -20°C +200°C 1/2in BSP 1/2 Stainless Steel, Steel Inline
RS Stock No. 134-7042
Mfr. Part No.ZRD-ABA02-S0-D1
BrandParker
MYR2,603.13
Each
units
ZRD CETOP 5 Double 0.7bar 315bar 160L/min -20°C +60°C - - - CETOP
RS Stock No. 728-887
Mfr. Part No.R900347495
MYR1,412.06
Each
units
6X CETOP 3 Double - 315 bar 60L/min -30°C +80°C - - - CETOP
RS Stock No. 134-7040
Mfr. Part No.ZRD-BZ02-S0-D1
BrandParker
MYR2,158.00
Each
units
ZRD CETOP 5 Single 0.7bar 315bar 160L/min -20°C +60°C - - - CETOP
RS Stock No. 134-7031
Mfr. Part No.ZRD-AZ01-S0-D1
BrandParker
MYR806.92
Each
units
ZRD CETOP 3 Single 0.7bar 350bar 80L/min -20°C +60°C - - - CETOP
RS Stock No. 283-8302
BrandRS PRO
MYR83.97
Each
units
FT260 - - - 350 bar 30L/min -20°C +100°C 3/8in G 3/8 Steel Inline
RS Stock No. 134-7050
Mfr. Part No.ZRE-B02-D1
BrandParker
MYR3,201.45
Each
units
ZRE CETOP 5 Single 2bar 315bar 120L/min -20°C +60°C - - - CETOP
RS Stock No. 134-7039
Mfr. Part No.ZRD-BA02-S0-D1
BrandParker
MYR2,158.00
Each
units
ZRD CETOP 5 Single 0.7bar 315bar 160L/min -20°C +60°C - - - CETOP
RS Stock No. 134-7043
Mfr. Part No.ZRD-ABZ02-S0-D1
BrandParker
MYR2,603.13
Each
units
ZRD CETOP 5 Double 0.7bar 315bar 160L/min -20°C +60°C - - - CETOP
RS Stock No. 134-7049
Mfr. Part No.ZRE-A02-D1
BrandParker
MYR2,817.28
Each
units
ZRE CETOP 5 Single 2bar 315bar 120L/min -20°C +60°C - - - CETOP
RS Stock No. 324-4950
BrandRS PRO
MYR548.48
Each
units
FT257 - - - 400 bar 40L/min -20°C +200°C 3/8in BSP 3/8 Stainless Steel, Steel Inline
RS Stock No. 134-7038
Mfr. Part No.ZRD-AZ02-S0-D1
BrandParker
MYR2,452.27
Each
units
ZRD CETOP 5 Single 0.7bar 315bar 160L/min -20°C +60°C - - - CETOP