Rotary actuator NTQ, SR series

electricpistonspring-return

NTQ/SR series spring return electric actuator is designed for fail-safe positioning of valves or dampers upon loss of supply voltage. Mechanical spring return design is used to position controlled device to either fully open or fully closed position without any external power source. Under normal power supply condition,actuator is launched by motor driven equipment and spring stores energy in the mean time.When emergency power off,spring releases the energy to drive the actuator and ensures the equipment and device return to safe position (full open or full close).The whole process is secure and stable to eliminate the burst pipes(hammer-blow effect).The mechanical part of spring return electric actuator includes driver unit, energy storage unit and energy locking unit. The three units constitute integrated transmission chain system by gear drive. Besides, the optional manual override ensures operators manually rotate equipment or device to a proper position and get locked with lock-up button.Manual release is not required during electric control operation. It has been fully approved by practice the series features following advantages: High performance and reliability Fully compliant with the latest international standards and regulations More applicable to a wide range of specifications and higher cost performance Compact design is better suited for a variety of industrial applications