GR — Manual Override

STI series Manual Override (GR) is designed to fit the purpose of transmission from a rotary manual movement to a linear motion of the shaft connected to the valve. The internal worm gear is mounted on ball bearings for long operating life. All STI actuators may be equipped with a manual override to allow operation of the control element when control air is not available or when actuator has to be manually operated. Several sizes are available according to the type of actuator required. For actuator series SCV the gear box is mounted between the actuator and the yoke, for SC series it is mounted in front of the actuator. The manual override can be used as an adjustable stroke limitator.