Festo 12939 HGL-1/4 Pilot Check Valve

The pilot check valve, also known as a pilot-operated check valve, pilot-controlled non-return valve, or unlockable check valve, from manufacturer Festo with type number 12939 HGL-1/4, is a pneumatic valve component. It has the dimensions 2 x 3 x 7 cm and weighs 0.06 kg. Pilot check valves allow free flow in one direction and block flow in the opposite direction, but can be opened by an external control signal. This ensures secure position holding of cylinders or other actuators in pneumatic systems. Typical applications are found in mechanical engineering for controlling lifting cylinders and in automation technology for precise control of motion sequences.

Pilot operated check valve. Manufactured