TorqPlus EM-Series Actuator
Actuator Models: All
Bulletin: 21077- 06/00
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.
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,
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 operating 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.
Installation and Operating Instructions
turn off all power to the actuator before remov-
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.
TorqPlus EM-Series Actuator
Installation and Operating Instructions
Once manual rotation is complete, remove the wrench and release the knob.
Note: The knob will remain
up until the actuator is electrically operated and the engagement slots on the output shaft align themselves
with the engagement slots on the output gear. Maximum time for re-engagement should be no greater than
45 seconds. Never pound on the center shaft.
Manual Declutch On 300 and 500 Series
800 Series
CAUTION: Do not apply more than the maximum rim pull rating of the handwheel. Rim pull should be no
greater than 5 pounds for a 2,000 in•lb actuator, 12.5 pounds for a 5,000 in•lb actuator, and 25 pounds for a
10,000 in•lb actuator.
Turn handwheel in the direction desired, as marked on the handwheel.
Avoid rotating beyond the driven
device’s operating quadrant.
6.0 Actuator Attachment
Manually operate the driven device several times to insure smooth trouble free operation and place in the
full CCW position as viewed from above.
It is highly recommended that each driven device be torque tested in its worst case condition to verify
proper sizing of the actuator.
If the driven device is equipped with mechanical stops, verify the travel limit cams toggle short of the
mechanical stop’s contact points.
Unless specially ordered, the actuator is shipped in the fully CCW position.
Carefully follow all instructions supplied with the device and/or the interconnecting hardware. When mounting
is complete, all connections should be tight, but not binding. It is also recommended to declutch and
manually operate the actuator during the mounting process to ease installation and
eliminate binding.
7.0 Cover Removal
Shut of all power to the actuator.
Loosen the socket set screw in the position indicator and remove the declutching/indicator knob from the
top of the unit. Note: This step is not required on the 100 and 800 series.
Remove all the cover attachment screws located around the flange and carefully lift the cover up and off.
Note: If manual operation is required with the cover removed, it is imperative that the declutching/
indicator knob replaced on the output shaft after the cover has been removed.
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