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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Description Prix 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
N° de stock RS 367-0618
Référence fabricantAKH04-00
MarqueSMC
7,52 €
Each
Unité
AKH Tube - 4mm Tube - 4mm 0.005MPa - -100kPa 1 MPa +60°C - -
N° de stock RS 189-2838
Référence fabricant7996 06 00
MarqueLegris
15,82 €
Each
Unité
7996 Tube - 6mm Tube - 6mm - - 1bar 10 bar +70°C - -
N° de stock RS 703-6255
Référence fabricant0821200008
25,05 €
Each
Unité
CC01 Threaded G 1/8 Female - Threaded G 1/8 Female - - Female 0.5bar 10 bar +80°C Female 1/8in
N° de stock RS 849-7231
Référence fabricantAKB02B-N02S
MarqueSMC
12,87 €
Each
Unité
AKB Threaded NPT 1/4 Female - Threaded NPT 1/4 Female - 0.005MPa Female -100kPa 1 MPa +60°C Female 1/4
N° de stock RS 367-0624
Référence fabricantAKH06-00
MarqueSMC
7,80 €
Each
Unité
AKH Tube - 6mm Tube - 6mm 0.005MPa - -100kPa 1 MPa +60°C - -
N° de stock RS 367-0652
Référence fabricantAKH12-00
MarqueSMC
24,45 €
Each
Unité
AKH Tube - 12mm Tube - 12mm 0.005MPa - -100kPa 1 MPa +60°C - -
N° de stock RS 367-0630
Référence fabricantAKH08-00
MarqueSMC
12,03 €
Each
Unité
AKH Tube - 8mm Tube - 8mm 0.005MPa - -100kPa 1 MPa +60°C - -
N° de stock RS 445-3133
Référence fabricant7985 06 13
MarqueLegris
16,21 €
Each
Unité
7985 Tube - 6mm Threaded R 1/4 Male - - - 1bar 10 bar +70°C Male -
N° de stock RS 384-7666
Référence fabricantT55C2800RS
MarqueNorgren
25,25 €
Each
Unité
T55 Threaded G 1/4 Female - Threaded G 1/4 Female - 0.05bar Female 0.1bar 10 bar +80°C Female 1/4in
N° de stock RS 849-7225
Référence fabricantAK2000-N02
MarqueSMC
19,38 €
Each
Unité
AK Threaded NPT 1/4 Female - Threaded NPT 1/4 Female - 0.02MPa Female 0.02MPa 1 MPa +60°C Female 1/4
N° de stock RS 849-7229
Référence fabricantAK4000-N04
MarqueSMC
23,08 €
Each
Unité
AK Threaded NPT 1/2 Female - Threaded NPT 1/2 Female - 0.02MPa Female 0.02MPa 1 MPa +60°C Female 1/2
N° de stock RS 384-7650
Référence fabricantT55C1800
MarqueNorgren
24,06 €
Each
Unité
T55 Threaded G 1/8 Female - Threaded G 1/8 Female - 0.05bar Female 0.1bar 10 bar +80°C Female 1/8in
N° de stock RS 826-8131
Référence fabricantAKH08B-01S
MarqueSMC
10,46 €
Each
Unité
AKH Tube - 8mm Threaded R 1/8 Male - 0.005MPa - -100kPa 1 MPa, 1.5 MPa +60°C Male -
N° de stock RS 290-3670
Référence fabricantT50P0006
MarqueNorgren
22,76 €
Each
Unité
T50P Tube - 6mm Tube - 6mm 0.03bar - -0.9bar 16 bar +80°C - -
N° de stock RS 202-3609
Référence fabricantH-QS-4
MarqueFesto
18,43 €
Each
Unité
H Tube - 4mm Tube - 4mm - - - - - - -
N° de stock RS 722-564
Référence fabricantS/520
MarqueNorgren
26,50 €
Each
Unité
S/520 Threaded G 1/8 Female - Threaded G 1/8 Female - <0.1bar Female 0.3bar 16 bar +80°C Female 1/8in
N° de stock RS 722-570
Référence fabricantS/521
MarqueNorgren
44,00 €
Each
Unité
S/520 Threaded G 1/4 Female - Threaded G 1/4 Female - <0.1bar Female 0.3bar 16 bar +80°C Female 1/4in
N° de stock RS 849-7238
Référence fabricantAKB01B-N01S
MarqueSMC
9,89 €
Each
Unité
AKB Threaded NPT 1/8 Male - Threaded NPT 1/8 Female - 0.005MPa Female -100kPa 1 MPa +60°C Female 1/8
N° de stock RS 203-8507
Référence fabricantH-M5
MarqueFesto
23,60 €
Each
Unité
H-M5 Threaded M5 5mm Threaded - 5mm - - - - - - -
N° de stock RS 445-3098
Référence fabricant7995 06 10
MarqueLegris
15,60 €
Each
Unité
7995 Threaded R 1/8 Male - Tube - 6mm - Male 1bar 10 bar +70°C - 1/8in