ESI Technologies Group
In a failsafe actuator, compressed air inside the actuator preloads the springs. During normal operation, each time the solenoid valve is tripped the compressed air is released into the atmosphere through the solenoid valve’s exhaust port. The patented ITT Habonim IMPACT™ unit diverts part of this energy to the spring chamber to boost the torque of the actuator by at least 50%.
The IMPACT™ comes in one size only which fits all size actuators making it a simple and easy solution for all the actuators on site or in inventory. Used with any actuator The IMPACT™ can be used with any type of spring return actuator, be it linear or rotary such as Rack and pinion (single piston, double piston, four pistons), Scotch-Yoke, Spring-Diaphragm, Vane type and Worm gear.
The IMPACT™ also functions as a Breather Block that isolates the spring chamber from the atmosphere, and as a check valve that ensures that the temporary reduction of the compressed air pressure does not trigger the movement of the valve and actuator to the mid-position.
The IMPACT™ is used for on/off systems only, and cannot be used for control applications.
The IMPACT™ can be utilized directly on site where operating conditions may occur that cause functional disorders or become a safety issue. Some typical examples are given here:
