You searched for "check processing"
Festo
Festo B Non Return Valve G 1/8 Male Inlet, G 1/8 Female Outlet, 10bar
Part: HAB-1/8
One-way pneumatic check valve prevents backflow in air systems up to 10 bar pressure.
EMERSON – AVENTICS
EMERSON – AVENTICS CC01 Non Return Valve G 1/8 Female Inlet, G 1/8 Female Outlet, 0.5 to 10bar
Part: 0821200008
Aventics check valve with threaded connections for compact pneumatic circuit installation.
Norgren
Norgren S/520 Non Return Valve G 1/8 Female Inlet, G 1/8 Female Outlet, 0.3 to 16bar
Part: S/520
High-pressure non-return valve with fine thread connections for industrial use.
Norgren
Norgren T55 Non Return Valve G 1/8 Female Inlet, G 1/8 Female Outlet, 0.1 to 0bar
Part: T55C1800
Compact pneumatic non-return valve preventing backflow in compressed air systems.