This product has been discontinued with no replacement.
This Sunvic SD2701 3 port mid-position spring return actuator works through the motor being energised when the actuator holds the valve open. As the actuator rotates, a spring inside winds up and the motor stalls out. When power is removed, energy in the coiled spring is released which closes the valve and stops the actuator.
Spring Return Actuator
Replaceable Actuator without the need to Drain the system
Technical specification
TypeActuatorManufacturer Model No4082701Brand NameSunvic
Reviews
Sunvic SD2701 Spring Return Actuator (3 Port Mid Position Actuator)