Flowserve Nuclear Qualified Pneumatic Actuator - Manual

1. All actuators are factory lubricated for life, but still
should be protected from the elements and stored indoors
until ready for use. The ports of the actuator are plugged
as supplied from the factory. If actuators are stored for a
long period of time prior to installation, the units
should be stroked every 3 months to prevent the
seals from taking set.
2. Prior to assembly, manually open and close valve to
insure freeness of operation. Be sure valve and Automax
Actuator rotate in the same direction and are in the same
position (i.e. valve closed, actuator closed).
3. Check the mounting surfaces, the stem adapter and
the bracket to assure proper fit. Secure the valve in the
closed position with the stem vertical. Bolt the bracket
to the valve and place the stem adapter on the valve stem.
Position the actuator over the valve and lower to engage
the stem adapter to the actuator shaft. Continue to lower
until the actuator seats on the bracket mounting surface.
In order to align the bolt holes, it may be necessary to
turn or stroke the actuator a few degrees and/or adjust the
actuator travel stops. Bolt the actuator to the bracket.
4. After consulting the valve manufacturer's
recommendations, adjust the travel stop bolts of the
actuator for the proper open and closed valve positions.
Pneumatically stroke the actuator several times to assure
proper operation without binding of stem adapter. If the
actuator is equipped with an Ultraswitch or other
accessories adjust them at this time.
5. To prolong actuator life use only clean, dry plant air.
Lubricated air is not required, however it is recommended
particularly for high cycle applications. Do not use
lubricated air with positioners.
Travel Stop Adjustments
All actuated valving requires accurate travel-stop
adjustments at both ends of the stroke to obtain optimum
performance and valve seat life. The accumulation of
tolerances in the adaptation of actuators to valves is such
that there must be a range of adjustments for both ends of
the stroke to achieve the expected performance.
The Heavy Duty series actuators have travel stop
adjustments in both the clockwise and counterclockwise
directions. The 12 degree overtravel feature provides
adjustments from -6 to +96 degrees.
Field Conversion from Fail CW to Fail CCW
(For Spring Return Actuators)
1. Apply supply air to actuator and loosen Stop Bolt
Jamnut (17) and back off clockwise Stop Bolt (16) to
remove all spring cartridge preload.
2. Remove supply air from actuator.
3. Support Spring Cartridge (11) and loosen all 4 Nuts
(41) evenly until all 4 nuts are loose. The spring cartridge
does not have to be removed.
4. Remove the Position Indicator (44) or any other
accessories that may be on the output shaft.
5. Remove the Bearing Retainer Screws (14) from the
valve mounting side and slide the Retainer Plate (13) off of
the shaft.
6. The Torque Shaft (20) may now be tapped out using a
soft faced hammer. Use care not to drop the shaft or the
Bearing (12) when they come out.
7. Rotate Torque Shaft (20) end for end and reinstall into
the Yoke (4) using care to line up the shaft with the
Bearing (12) on the opposite end. Push the shaft through
until the shaft bottoms out. This should only require hand
pressure to reinstall the shaft.
8. Reinstall the Bearing (12) back into the housing until it
is flush with the top of the housing.
9. Reinstall the Bearing Retainer Plate (13) and Screws
(14) insuring that the Gasket (37) is in place.
10. Tighten the Spring Cartridge Nuts (41) evenly until
they are all 4 evenly tightened. See bolt torque chart.
11. Apply supply air to actuator and reset Stop Bolt (16).
Never try to adjust stop bolt against force of spring.
12. Reinstall position indicator or any accessories on
Torque Shaft (20).
13. Check actuator for proper operation.
B00143-0 Page: 1 of 4
11444 Deerfield Road
Cincinnati, Ohio 45242
(513) 489-7800
Nuclear Qualified Actuator
Installation Instructions