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Electric Actuator Model EVS/EVT

Electric Actuator Model EVS/EVT
7Pages

Catalog excerpts

ONE HAYWARD INDUSTRIAL DRIVE CLEMMONS, NC 27012 PHONE (336)-712-9900 FAX (336) 712-9518 PARTS LIST > 1 Cover 2 Cover Screws 3 Gasket (shown) or O-ring (weather proof models) 4 Base 5. > Output coupling 6. > Bull Gear 7. > Bull Gear Retaining Ring 8. > Output/Cam Shaft 9. > Cams 10. > Mother Board 11. > Mother Board Bracket 12. > Limit Switches 13. > Override Shaft 14. > Motor Gear Box 15. > Motor Support Plate screws 16. > Motor Support Plate 17. > Pinion Gear

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EVS - EVT Series AC voltage actuators use a split phase motor which internally steps up the applied 115 AC voltage and feeds it back to the off terminal. For example, when 115 VAC power is applied at terminals I and 4, 230 volts will be fed back to terminal 3. This can create a problem for controllers with solid state outputs rated for less than 230 VAC and it is suggested that relay outputs be used. > It is important to verify that the output torque of the actuator is appropriate for the torque requirements of the valve and that the actuator duty cycle is appropriate for the intended...

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: 1/16 inch hex wrench small flat blade screw driver 1/2 inch open or box wrench - large enclosures 3/16 inch hex wrench - small enclosures > The actuator may be mounted in any position. In outdoor applications the actuator should not be installed upside down. Verify that the output torque of the actuator is appropriate for the torque requirements of the valve. All actuators are furnished with a female drive output. On the EVT Series actuators, the output is 0.75" square by 0.75" deep. On the EVS Series actuators, the output is 1.00" square by 1.40 deep. Two ISO. bolt patterns (ISO 5211)are...

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EVSIOM Rev A June 23, 1999 ECR 819R 4 WIRING > For 115 VAC actuators, 18 or 20 gauge wire may be used for short runs. At least 16 gauge wire is recommended for longer runs. Be sure to follow local wiring codes. To operate an electric actuator, power (which may be 24, 115, or 230 VAC dependent on the actuator - please match before wiring as the wrong voltage will destroy the motherboard) from the user is wired directly to the actuator's motor through two limit switches. The limit switches control the actuators mechanical travel limits, usually 90 degrees. To drive the actuator...

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The two limit switches operating off the cams on the output shaft determine the exact positions where the actuator will stop at the end of each cycle. The first limit switch (lower) determines the closed position (CW rotation). The second limit switch (upper) determines the open position (CCW rotation). The limit switches can be adjusted from5 to 320 degrees of actuator rotation. If an adjustment of any of the positions is required, proceed as follows: A. Remove Actuator Cover Remove the actuator cover by removing the screws securing the cover to the base. B. Adjust the OPEN limit switch...

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Manual Override Function: To use the manual override function, push the override shaft down approximately a1/4 inch to disengage the motor from the gear train. While holding the shaft down, turn the shaft with a wrench to reach the desired position. Be careful not to drive the actuator past the limit switch settings; it is possible to damage installed options such as a feedback potentiometer. Note: The manual override shaft must be returned to its fully upward position before the motor is re-engaged. > Check that the proper voltages are present at the actuator's terminal connections. Check...

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Electric Actuator Model EVS/EVT 7Pages

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Electric Actuator Model EVS/EVT
7Pages