You searched for "check processing"
SMC
SMC AK Non Return Valve NPT 1/4 Female Inlet, NPT 1/4 Female Outlet, 0.02 to 1MPa
Part: AK2000-N02
SMC non-return valve with NPT threaded connections for pneumatic systems.
SMC
SMC AK Non Return Valve NPT 1/2 Female Inlet, NPT 1/2 Female Outlet, 0.02 to 1MPa
Part: AK4000-N04
SMC pneumatic non-return valve for low-pressure air systems with NPT threaded connections.
SMC
SMC AK Non Return Valve, Rc 1 Female Outlet, 0.02 to 1MPa
Part: AK6000-10
SMC pneumatic non-return valve with female threaded outlet for low-pressure air systems.
SMC
SMC AK Non Return Valve Rc 1/4 Female Inlet, 0.02 to 1MPa
Part: AK2000-02-X209
SMC check valve with threaded inlet controls backflow in low-pressure pneumatic systems.