Complex sentence: The valve is equipped with a pneumatic actuator supplied by a three-way solenoid valve: the pressure of the pilot medium enters the actuator cylinder and acts on the piston, which allows the seal to open or to close through the stem.
Split into simpler sentences: The valve is equipped with a pneumatic actuator supplied by a three-way solenoid valve. The pressure of the pilot medium enters the actuator cylinder and acts on the piston, which allows the seal to open or to close through the stem.