Siemens Building Technology 331-3013 Actuator 321042-401 If your total motor load

If your total motor load (including parallel motors) exceeds 80% of this rating

preventing incorrect pressure readings

While it crosses to many OEM parts like the 7021-4927 and 7121-7203

For 0-10V or 4-20mA modulating signals

and various hydrocarbon media

Siemens Building Technology 331-3013 Actuator 321042-401 If your total motor loadThe Siemens Building Technology 331 3013 Actuator is a heavy duty #6 pneumatic damper actuator designed for contractors requiring high torque performance in demanding HVACR environments. This rugged metal fabricated power unit features a 3 13 psi nominal spring range and a 4 inch stroke, making it ideal for the gradual or positive actuation of large dampers, fire and smoke dampers, and centrifugal refrigeration inlet vanes. Built with a replaceable