2076 NORTHWOODS DR
MUSKEGON, MI 49442
PHONE (231) 788-7025
FAX (231) 788-7030
www.dynatorque.com
ISO 9001:2008 CERTIFIED
Page 2 of 4
IOMSD
IOM FOR DYNATORQUE™ SANDWICH DECLUTCHING MANUAL OVERRIDE (SD TYPE)
Revised: 4-15-11
6. The opposite end of the driver should be configured to match the pneumatic operator output drive.
Align the pneumatic actuator drive with the override driver and lower the pneumatic actuator into place
on the top flange of the override.
7. Bolt the pneumatic actuator into place.
8. Check the stop adjustment screws on the SD operator to ensure that they do not interfere with the
valve or pneumatic actuator stops if they exist. To set the override stops, loosen the lock nut on each of
the SD stop bolts and back them out several turns. (DT12SD through DT140SD only) Adjust the valve
to the desired position. Turn the stop bolt clockwise on the appropriate side until it comes into contact
with the override gear quadrant. Once contact has been made, reverse rotation and back out the bolt ½
to 1 turn. Tighten the lock nut against the housing. Rotate the override to the opposite end and repeat
the process.
9. Before operating the pneumatic actuator, make sure that the SD override is in the normal declutched
position.
IMPORTANT NOTE: The actuator stops (NOT the SD stops) must be set to establish the full
clockwise and counterclockwise travel of the actuator. The SD stops should be set so that they
are not subject to the rotational force generated by the actuator.
Normal Position – Disengaged:
The picture (left) shows the DT21SD in the “normal
position, disengaged” for standard pneumatic operation.
As shown, the handle arrangement is pinned in the down
position. The handwheel should rotate freely in both the
clockwise and counter-clockwise directions, without
causing valve or actuator movement.
Override Position – Engaged:
The picture (left) shows the DT21SD in the “override
position, engaged” for override operation. As shown, the
handle arrangement is pinned in the up position for manual
override. Assuming a “failure to close clockwise” (as viewed from above) application: Rotation of the
handwheel clockwise will rotate the actuator clockwise (generally the closed direction); rotation of the
handwheel counter-clockwise will rotate actuator counter-clockwise (generally the open direction).
Note: Air pressure in the pneumatic actuator must be vented to atmosphere and/or air
connections to pneumatic actuator must be disconnected prior to override.
