This bulletin provides installation and operating information for the Bettis TorqPlus EM-Series Actuator. Should you have any
questions about the controller that are not covered under this bulletin, please contact an authorized Bettis Valve Automation Center
or Bettis Electric Division, Mansfield, Ohio U.S.A.
TorqPlus EM-Series Actuator
Installation and Operating Instructions
Actuator Models: All
Bulletin: 21077- 06/00
1.0 Caution
Electrical shock and/or explosion hazard. To avoid serious personal injury, death, or property damage due to
electrical shock and/or ignition of hazardous atmospheres,
turn off all power to the actuator before remov-
ing the actuator cover.
2.0 Inspection
Because many models look alike, verify the actuator’s nameplate to insure correct model number, torque,
operating speed, voltage, and enclosure type before installation or use.
3.0 Storage
The actuator must be stored in a clean, dry, temperature controlled area. The unit shall be stored with the cover
installed and with the conduit openings sealed. Storage must be off the floor, covered with an unsealed dust
protector that will allow side and bottom ventilation. Care must be taken to guard the actuator from condensation
in extreme temperature variations. If no other means are available, internal heaters are recommended.
4.0 Maintenance
Each Bettis electric actuator is a totally enclosed unit with a permanently lubricated gear train. Once installed,
formal maintenance should not be required. However, periodic preventative maintenance will extend the oper-
ating life of the actuator. PM checks include:
Insure that alignment relative to the load on the actuator is proper. Mis-alignment is a major cause of
premature actuator failure.
Insure all wiring is insulated, connected, and terminated properly.
Insure all screws are present and tight, including set screws for the cams.
Insure cleanliness of the internal electrical devices.
Insure conduit connections are installed properly and are dry. No signs of condensation or water
infiltration should be present inside the conduit or conduit ports on the actuator.
Check internal devices for condensation or corrosion.
Upon installation of cover, insure proper seal and verify that o-ring is not pinched between the flange.
Verify declutch mechanism and manual override operates properly.
Inspect label to verify model number, serial number, and electrical ratings are readable.
Verify actuator is operating in the proper quadrant.
During operation, perform a visual inspection during an open and close cycle. Also, listen for any
abnormal noises or sounds.
Under normal conditions, this inspection is recommended at six month intervals. But where conditions are
more severe, more frequent inspection may be advisable.
5.0 Manual Operation
100 Series
The 100 series has no manual override. Therefore, to transition the end device, the actuator must either be
removed or electrically operated.
300 and 500 Series (reference photo next page)
CAUTION: Do not apply more torque to the manual override shaft than the actuator is rated for. Cover should
always be installed when manually overriding the actuator.
Pull declutching/position indicator knob up and hold.
Engage wrench on exposed shaft drive flats and move back and forth to disengage output shaft from drive
train.
After disengagement, rotate in desired direction.
Avoid rotation beyond the driven device’s operating
quadrant.
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