Pneumatic Non-Return Valves

Pneumatic non-return valves are one of the simplest types of pneumatic valves available. They allow compressed air to flow in one direction and prevent or block it from flowing in the opposite direction. Also known as a check valve these simple but effective devices help to eliminate any potential damage that may be caused by backflow pressure. RS Components offer a range of high-quality valves from leading brands including Festo, SMC, Legris, Norgren and of course RS PRO.

How does a Pneumatic Non-Return Valve Work?

Non-return valves work automatically, which means that most valves don’t need human intervention external control to work. The valves will have two openings or ports, an inlet and an outlet port. An internal spring will lift when the pressure upstream is great enough to overcome the tension of the spring. This is referred to as the ‘cracking pressure’.

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 are the different types of Pneumatic Non-return valve?

Pneumatic non-return valves are available in two main types. Push in tube-to-tube or Push-in tube to threaded.

Tube-to-Tube Non Return Valves

This type of non-return valve will have a push-in connection port at either end. They are available with different body materials, including brass and aluminium. Hose sizes ranging from 4 mm to 12 mm

Tube to Threaded Non Return Valves

This type of non-return valve will have a tube connection on one end and a threaded connection on the other. They are available with different body materials including brass and aluminium. Hose sizes ranging from 4 mm to 12 mm. Threads are typically BSPP (G), BSPT (R), NPT, and Metric.


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Omschrijving Prijs Manufacturer Series Inlet Connection Type Threaded Inlet Connection Tube Inlet Connection Outlet Connection Type Threaded Outlet Connection Tube Outlet Connection Cracking Pressure Threaded Inlet Gender Minimum Operating Pressure Maximum Operating Pressure Maximum Operating Temperature Threaded Outlet Gender Threaded Inlet Thread Size
Nieuw
RS-stocknr. 218-0225
FabrikantnummerC00GL0600
FabrikantIMI Norgren
€ 31,41
Each
Aantal stuks
C00GL Tube - 6mm Tube - 12.5mm - - - - - - -
RS-stocknr. 203-8504
FabrikantnummerHB-1/2-QS-12
FabrikantFesto
€ 51,53
Each
Aantal stuks
HB-1/2-QS-12 Threaded - 12mm Threaded - R1/2 - - - - - - -
RS-stocknr. 187-5696
FabrikantRS PRO
€ 87,13
1 Bag of 10
Bag(s)
6063 Threaded 1/8 in Male - Threaded - - - Male 2bar 8 bar +80°C Female 1/8 in
RS-stocknr. 187-5691
FabrikantRS PRO
€ 92,46
1 Bag of 10
Bag(s)
57065 Tube - Push In 8 mm Threaded - - - - 2bar 8 bar +80°C Male -
RS-stocknr. 179-5283
FabrikantnummerR412010569
€ 15,48
Each
Aantal stuks
CC04 Threaded - - Tube - 6mm 0.5bar Male 0.5bar 10 bar +60°C - 1/8
RS-stocknr. 703-6286
Fabrikantnummer0821200195
€ 15,94
Each
Aantal stuks
CC02 Tube - 8mm Threaded G 1/8 Male - - - 0.5bar 10 bar +70°C Male -
RS-stocknr. 202-3551
FabrikantnummerHA-1/8-QS-4
FabrikantFesto
€ 18,43
Each
Aantal stuks
HA Threaded - - Tube - 4mm - - - - - - -
RS-stocknr. 202-3591
FabrikantnummerHGL-1/4-QS-8
FabrikantFesto
€ 46,84
Each
Aantal stuks
HGL Tube - 8mm Threaded - - - - - - - - -
RS-stocknr. 204-0032
FabrikantnummerISV-1/4
FabrikantFesto
€ 27,67
Each
Aantal stuks
ISV Threaded - 4mm Threaded G 1/4 Female 4mm - - - - - - -
RS-stocknr. 202-3743
FabrikantnummerH-3/8-B
FabrikantFesto
€ 36,76
Each
Aantal stuks
B Threaded - - Threaded - - - - - - - - -
RS-stocknr. 203-8503
FabrikantnummerHGL-1/2-QS-12
FabrikantFesto
€ 63,76
Each
Aantal stuks
HGL-1/2-QS-12 Threaded - 12mm Threaded - G1/2 - - - - - - -
RS-stocknr. 187-5690
FabrikantRS PRO
€ 85,90
1 Bag of 10
Bag(s)
57065 Tube - Push In 8 mm Threaded - - - - 2bar 8 bar +80°C Male -
RS-stocknr. 202-3582
FabrikantnummerH-1/2-B
FabrikantFesto
€ 49,63
Each
Aantal stuks
B Threaded - - Threaded - - - - - - - - -
RS-stocknr. 203-8515
FabrikantnummerHB-1/4-QS-6
FabrikantFesto
€ 20,76
Each
Aantal stuks
HB-1/4-QS-6 Threaded - 6mm Threaded - R1/4 - - - - - - -
RS-stocknr. 144-2694
FabrikantRS PRO
€ 4,66
1 Bag of 1
Bag(s)
- Threaded - - - - 6mm - Male 0 kgf/cm², 0 kPa 9.9 kgf/cm², 990 kPa +60°C - 1/8 in
RS-stocknr. 176-2268
FabrikantRS PRO
€ 20,398
Each (In a Pack of 10)
Aantal stuks
- - - - - - - - Female 2bar 8 bar +80°C Female 9.525 mm
RS-stocknr. 826-8131
FabrikantnummerAKH08B-01S
FabrikantSMC
€ 10,46
Each
Aantal stuks
AKH Tube - 8mm Threaded R 1/8 Male - 0.005MPa - -100kPa 1 (Operating) MPa, 1.5 (Proof) MPa +60°C Male -
RS-stocknr. 762-1398
FabrikantnummerAC-VP
FabrikantMetcal
€ 10,91
Each
Aantal stuks
- - - - - - - - - - - - - -
RS-stocknr. 204-0039
FabrikantnummerISV-M6
FabrikantFesto
€ 25,73
Each
Aantal stuks
ISV Threaded - 6mm Threaded - 6mm - - - - - - -
Nieuw
RS-stocknr. 218-0226
FabrikantnummerC00GL0800
FabrikantIMI Norgren
€ 60,57
Each
Aantal stuks
C00GL Tube - 8mm Tube - 14.5mm - - - - - - -