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 Price 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庫存編號 722-564
製造零件編號S/520
BrandNorgren
TWD1,197.00
單位
S/520 Threaded G 1/8 Female - Threaded G 1/8 Female - <0.1bar Female 0.3bar 16 bar +80°C Female 1/8 in
RS庫存編號 189-2816
製造零件編號7996 04 00
BrandLegris
TWD474.00
單位
7996 Tube - 4mm Tube - 4mm 0.3bar - 1bar 10 bar +70°C - -
RS庫存編號 249-5882
製造零件編號AK2000-02-X209
BrandSMC
TWD1,074.00
單位
AK Threaded Rc 1/4 Female - - - - 0.02MPa Female 0.02MPa 1 MPa +60°C - 1/4 in
RS庫存編號 721-3575
製造零件編號ASR630F-04-12S
BrandSMC
TWD2,067.00
單位
ASR Threaded R 1/2 Male - Tube - 12mm - Male - 1 MPa +60°C - 1/2 in
RS庫存編號 619-0935
製造零件編號7996 12 00
BrandLegris
TWD1,182.00
單位
7996 Tube - 12mm Tube - 12mm - - 1bar 10 bar +70°C - -
RS庫存編號 290-3692
製造零件編號T50P0010
TWD1,494.00
單位
T50P Tube - 10mm Tube - 10mm 0.03bar - -0.9bar 16 bar +80°C - -
RS庫存編號 290-3664
製造零件編號T50P0004
BrandNorgren
TWD991.00
單位
T50P Tube - 4mm Tube - 4mm 0.03bar - -0.9bar 16 bar +80°C - -
RS庫存編號 187-5693
BrandRS PRO
TWD4,023.00
毎包:10 個
Bag(s)
57065 Tube - Push In 10mm Threaded - - - - 2bar 8 bar +80°C Male -
RS庫存編號 187-5699
BrandRS PRO
TWD9,134.00
毎包:10 個
Bag(s)
6063 Threaded 1/2 in Male - Threaded - - - Male 2bar 8 bar +80°C Female 1/2in
RS庫存編號 187-5687
BrandRS PRO
TWD3,027.00
毎包:10 個
Bag(s)
57065 Tube - Push In 4mm Threaded - - - - 2bar 8 bar +80°C Male -
RS庫存編號 826-8116
製造零件編號AKH04B-01S
BrandSMC
TWD356.00
單位
AKH Tube - 4mm Threaded R 1/8 Male - 0.005MPa - -100kPa 1 MPa, 1.5 MPa +60°C Male -
RS庫存編號 203-8504
製造零件編號HB-1/2-QS-12
BrandFesto
TWD2,065.00
單位
HB-1/2-QS-12 Threaded - 12mm Threaded - R1/2 - - - - - - -
RS庫存編號 290-3670
製造零件編號T50P0006
BrandNorgren
TWD1,205.00
單位
T50P Tube - 6mm Tube - 6mm 0.03bar - -0.9bar 16 bar +80°C - -
RS庫存編號 144-2693
BrandRS PRO
TWD150.00
毎包:1 個
Bag(s)
- Threaded - - - - 4mm - Male 0 kgf/cm², 0kPa 9.9 kgf/cm², 990 kPa +60°C - 1/8in
RS庫存編號 189-2838
製造零件編號7996 06 00
BrandLegris
TWD506.00
單位
7996 Tube - 6mm Tube - 6mm - - 1bar 10 bar +70°C - -
RS庫存編號 204-0032
製造零件編號ISV-1/4
BrandFesto
TWD1,109.00
單位
ISV Threaded - 4mm Threaded G 1/4 Female 4mm - - - - - - -
RS庫存編號 202-3569
製造零件編號HA-1/4-QS-8
BrandFesto
TWD931.00
單位
HA Threaded - - Tube - 8mm - - - - - - -
RS庫存編號 202-3586
製造零件編號HA-1/2-QS-12
BrandFesto
TWD2,065.00
單位
HA Threaded - - Tube - 12mm - - - - - - -
RS庫存編號 202-3614
製造零件編號HB-1/8-QS-6
BrandFesto
TWD779.00
單位
HB Tube - 6mm Threaded - - - - - - - - -
RS庫存編號 202-3591
製造零件編號HGL-1/4-QS-8
BrandFesto
TWD1,877.00
單位
HGL Tube - 8mm Threaded - - - - - - - - -