The FESTO HS-4 hand lever valve is a manual pneumatic control valve used to locally actuate compressed-air circuits. With a hand lever for operator-driven actuation, it directly directs airflow to pneumatic actuators in compact automation setups. The HS-4 2120 R3 variant belongs to FESTO's HS-4 family and is designed for applications where manual control is preferred or required in pneumatic systems.
