ESR-Series electric actuator provides an internal bank of super-capacitor power storage devices that never need replacement. Designed for two-position operation, it provides true two-wire control: When the actuator is energized it drives to one position; when de-energized the actuator powers itself to the other position.
The quarter-turn electric actuator will also be designed to meet NEMA standards for use in weathertight or weathertight and hazardous locations. The actuator will be a single, complete unit composed of a compact cast aluminum housing, motor, gearing, limit switches controlled by metal cams for end of travel control, mechanical position indicator, and an internal back-up power source to drive to a pre-set position in the event of an external power loss. Actuator mounting flanges shall comply with ISO 5211 standards incorporating a female drive for direct output coupling. The actuator shall be capable of operating in ambient environments of -40° F to 130° F; optional internal heaters are required at temperatures below 32° F.Features:
- Compact and lightweight
- Internal energy storage provides power to “safe” position during power outages
- Field-settable to “fail-clockwise” or “fail-counterclockwise”
- High standard duty cycle
- True “two-wire” operation
- Internal capacitors are rated for a minimum of 100,000 cycles
- Long-term reliability
- No maintenance required
- Low cost of ownership
- Easy installation and set up
Download Valvcon ESR-Series Electronic Spring-Return Electric Actuator Technical Bulletin
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