Optional
Features
POWER ON: The
electric motor, brake solenoid and spring control clutch are
energized, diving the gear train which in turn winds the spring and
turns the valve. An internal limit switch de-energizes the motor and
enganges the solenoid brake which holds the return spring and valve in
position.
POWER OFF:
When the current is interupted by either a control signal or a power
failure, the spring control clutch is de-energized which in turn
disengages the gear train. The return spring drives the valve to its
original postition. Shock damage to the valve and piping is avoided by
graduating the speed of return with the integral shock absorber.
DRIVE DIRECTION:
All surepowr models can be factory built for closkwise or
countercloskwise spring return rotation, as viewed from top of actuator,
looking at valve stem. Please specify when ordering.
SPECIAL NOTE:
Designed for intermittent operation as typified by applications which
require emergency shutoff. For rapid cycling applications, consult
factory.
Specifications
Ambient Temperature: -40deg.F to + 150deg.F (with heater)
Lubrication: High temperature gear grease and self-lubricating
bearings
Mounting: Universal
Enclosures: NEMA-4 standard; Meets all of the following in a
single enclosure:
Type 4 watertight and dust tight indoor and outdoor non-hazardous
locations.
Types 7 & 9 explosion-proof Class I, Groups C and D, Class II,
Groups E, F, G hazardous locations.
Power: 120/220 Vac 60/50 Hz 1 phase
Limit Switches: All Models UL and CSA listed:
15 A and 1/2 hp, 125 or 250 Vac: 1/2 A, 125 Vdc; 1/4 A, 250 Vdc; 5 A,
120 Vac "L" (lamp load)
Conduit Entry: Provision (standard) 3/4" conduit
End Torque Rating: 600 in-lbs
Shaft Speed:
Spring Return: 90 deg. in 2 seconds
Motor Mode: 90 deg. in 5-30 seconds
Motor Current; LR (locked rotor): 1.80-1.55-.70 at 120 Vac
1.20-.90-.35 at 220 Vac
Solenoid Brake Current Draw: 20VA at120Vac
Notes:
Total time to travel through a full 90 deg. cycle is approximately
double the time shown, e.g. five seconds to set eletcrtic clutch, plus
five seconds to drive output shaft.