Flowserve SNA-Series Pneumatic Actuator - Manual

FCD AXAIM0004- 01 (AUTO-4) 03/ 11 Page: 1 of 4
© 2011, Flowserve Corporation, Printed in USA
3-Position Control/Dribble Control
SR Limit Switch Method
Flowserve Corporation 1350 N. Mountain Springs Parkway 1978 Foreman Dr.
Flow Control Division Springville, Utah 84663-3004 Cookeville, TN 38501
www.flowserve.com Phone: 801 489 2233 Phone: 931 432 4021
Automax Valve Automation Systems
Installation, Operation and Maintenance Instructions
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 periodically to prevent the seals from
taking a set.
Prior to assembly, check the mounting surfaces, the stem adaptor
and the bracket to assure proper fit. Manually open and close the valve
to insure freeness of operation. Be sure the valve and actuator rotate in
the same direction and are in the same position (i.e., valve open,
actuator open). Secure the valve with the stem vertical. Bolt the bracket
to the valve and place the stem adaptor on the valve stem. Position the
actuator over the valve and lower to engage the stem adaptor 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 actuators
travel stops. Bolt the actuator to the bracket.
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 with no binding of the stem adaptor. If the
actuator is equipped with an UltraSwitch or other accessories, adjust
them at this time.
To prolong actuator life use only clean, dry plant air. Lubricated
air is not required, however it is recommended particularly for high
cycle applications.
Caution: Do not use lubricated air with positioners.
Actuator Fail Clockwise Counterclockwise
Type Position (CW) (CCW)
Double Acting Left End Cap Right End Cap
Spring Return CW Left End Cap Right End Cap
Spring Return* CCW* Right End Cap Left End Cap
*The pistons are rotated 180 ° for CCW fail position.
SuperNova SNA-Series Pneumatic Actuator
Endcap Screw Adjustment Bolt Spring
Actuator Socket Size Socket Size Color Code
SNA050 4mm 3mm White
SNA063 5mm 4mm Light Green
SNA085 6mm 5mm Blue
SNA100 6mm 6mm Red
SNA115 6mm 6mm Yellow
SNA125 8mm 6mm Grey
SNA150 8mm 8mm Dark Green
SNA175 10mm 8mm Purple
SNA200 12mm 8mm Orange
Adjustment Bolt Location
Maintenance Instructions
Disassembly Procedures
1. Disconnect all air and electrical supplies from actuator.
2. Remove all accessories from actuator and dismount actuator
from valve.
3. Position actuator with air supply ports facing you. Apply air
pressure to Port 2 to release spring pressure from the Stop
Bolt (9).
4. Remove the Stop Bolt Retaining Nut (14), Washer (15),
and O-ring (16) on the Left Endcap (19) and turn the
Stop Bolt (9) clockwise into the Body (1) until it is flush
with the endcap (19).
All actuated valves require accurate travel-stop adjustments at both
ends of the stroke to obtain optimum performance and valve seat
life. The accumulation of tolerances in adapting actuators to valves
is such that there must be a range of adjustment for both ends of
the strike to achieve the expected performance.
Travel Stop Adjustments
Both Directions
Stop Adjustments and Locations
View the actuator with the Air Ports facing you.
The SuperNova actuators have unique travel stop
adjustments in both the clockwise and counterclockwise
directions.