The RAF 31-33 are activated by line pressure. The valves open or close by electric command through a selectioin of solenoid valves. the solenoid opens or closes the RAF/RAY/G 31-33 as it is energized by an electric pulse. The electric pulse that commands the valve is generated by a controller, timer, sensor or an electric control device.
RAF 31-33 are used for remote operation of hydraulic valves by an electric command. The valves can be configured either as Normally Open (NO) or Normally closed (NC).