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
RS-stocknr. 367-0618
FabrikantnummerAKH04-00
FabrikantSMC
7,52 €
Each
Aantal stuks
AKH Tube - 4mm Tube - 4mm 0.005MPa - -100kPa 1 MPa +60°C - -
RS-stocknr. 189-2838
Fabrikantnummer7996 06 00
FabrikantLegris
15,82 €
Each
Aantal stuks
7996 Tube - 6mm Tube - 6mm - - 1bar 10 bar +70°C - -
RS-stocknr. 703-6255
Fabrikantnummer0821200008
25,05 €
Each
Aantal stuks
CC01 Threaded G 1/8 Female - Threaded G 1/8 Female - - Female 0.5bar 10 bar +80°C Female 1/8in
RS-stocknr. 849-7231
FabrikantnummerAKB02B-N02S
FabrikantSMC
12,87 €
Each
Aantal stuks
AKB Threaded NPT 1/4 Female - Threaded NPT 1/4 Female - 0.005MPa Female -100kPa 1 MPa +60°C Female 1/4
RS-stocknr. 367-0624
FabrikantnummerAKH06-00
FabrikantSMC
7,80 €
Each
Aantal stuks
AKH Tube - 6mm Tube - 6mm 0.005MPa - -100kPa 1 MPa +60°C - -
RS-stocknr. 367-0652
FabrikantnummerAKH12-00
FabrikantSMC
24,45 €
Each
Aantal stuks
AKH Tube - 12mm Tube - 12mm 0.005MPa - -100kPa 1 MPa +60°C - -
RS-stocknr. 367-0630
FabrikantnummerAKH08-00
FabrikantSMC
12,03 €
Each
Aantal stuks
AKH Tube - 8mm Tube - 8mm 0.005MPa - -100kPa 1 MPa +60°C - -
RS-stocknr. 826-8131
FabrikantnummerAKH08B-01S
FabrikantSMC
10,46 €
Each
Aantal stuks
AKH Tube - 8mm Threaded R 1/8 Male - 0.005MPa - -100kPa 1 MPa, 1.5 MPa +60°C Male -
RS-stocknr. 445-3133
Fabrikantnummer7985 06 13
FabrikantLegris
16,21 €
Each
Aantal stuks
7985 Tube - 6mm Threaded R 1/4 Male - - - 1bar 10 bar +70°C Male -
RS-stocknr. 290-3670
FabrikantnummerT50P0006
FabrikantNorgren
33,21 €
Each
Aantal stuks
T50P Tube - 6mm Tube - 6mm 0.03bar - -0.9bar 16 bar +80°C - -
RS-stocknr. 384-7666
FabrikantnummerT55C2800RS
FabrikantNorgren
25,25 €
Each
Aantal stuks
T55 Threaded G 1/4 Female - Threaded G 1/4 Female - 0.05bar Female 0.1bar 10 bar +80°C Female 1/4in
RS-stocknr. 384-7650
FabrikantnummerT55C1800
FabrikantNorgren
20,30 €
Each
Aantal stuks
T55 Threaded G 1/8 Female - Threaded G 1/8 Female - 0.05bar Female 0.1bar 10 bar +80°C Female 1/8in
RS-stocknr. 849-7229
FabrikantnummerAK4000-N04
FabrikantSMC
23,08 €
Each
Aantal stuks
AK Threaded NPT 1/2 Female - Threaded NPT 1/2 Female - 0.02MPa Female 0.02MPa 1 MPa +60°C Female 1/2
RS-stocknr. 849-7225
FabrikantnummerAK2000-N02
FabrikantSMC
19,38 €
Each
Aantal stuks
AK Threaded NPT 1/4 Female - Threaded NPT 1/4 Female - 0.02MPa Female 0.02MPa 1 MPa +60°C Female 1/4
RS-stocknr. 187-5690
FabrikantRS PRO
90,20 €
1 Bag of 10
Bag(s)
57065 Tube - Push In 8mm Threaded - - - - 2bar 8 bar +80°C Male -
RS-stocknr. 187-5691
FabrikantRS PRO
97,08 €
1 Bag of 10
Bag(s)
57065 Tube - Push In 8mm Threaded - - - - 2bar 8 bar +80°C Male -
RS-stocknr. 144-2702
FabrikantRS PRO
11,56 €
1 Bag of 1
Bag(s)
- Tube - 12mm - - 12mm - - 0 kgf/cm², 0kPa 9.9 kgf/cm², 990 kPa +60°C - -
RS-stocknr. 204-0035
FabrikantnummerISV-M10
FabrikantFesto
28,49 €
Each
Aantal stuks
ISV Threaded - 10mm Threaded - 10mm - - - - - - -
RS-stocknr. 445-3149
Fabrikantnummer7985 08 13
FabrikantLegris
17,92 €
Each
Aantal stuks
7985 Tube - 8mm Threaded R 1/4 Male - - - 1bar 10 bar +70°C Male -
RS-stocknr. 144-2703
FabrikantRS PRO
3,50 €
1 Bag of 1
Bag(s)
- - - - - - - - - - 9.9 kgf/cm², 990 kPa +60°C - -