The
Model EA31 actuator is a non-spring return gear driven crankshaft
actuator for two position operation of dampers, valves or other equipment
that doesn't require return to normal position upon power interruption.
The hardened steel crankshaft is driven through a train of precision
hobbed gears. The actuator is driven by a shaded pole motor that is
completely submerged in oil and sealed in an aluminum case to assure
long life and minimum maintenance. The gear train of the EA31 crank
actuator is also sealed in oil.
Working
in conjunction with primary loop controllers, these power units are
ideal for ON-OFF control of valves and dampers. The EA31 travel time
is 30 seconds and its shaft rotation is a unidirectional 180º
clockwise stroke from 0-180º or clockwise from 180-0º. The
Model EA31-00000-00-0-00 is UL/CSA listed. All other models are UL/cUL
listed. It is compatible with the VB-7000 and VB-9000 valves in this
catalog.
Non-spring return two position operation