Install Instructions

Document No. 129-213
Installation Instructions
September 28, 2009
Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and
models as design improvements are introduced. Flowrite is a registered trademark of Siemens Industry, Inc. © 2009 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089
+ 1 847-215-1000
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Document No. 129-213
Printed in the U.S.A.
Page 2 of 2
Installation, Continued
Follow the pattern shown in Figure 3 for tightening
the screws.
AP0153R1
1
6
43
52
Figure 3. Assembling the Upper and Lower Housing.
AP0157R1
3
1
3/4"
2
1/2"
Figure 4. Returning the Actuator to Service.
Adjust the spring tension to the original start point
noted in the prerequisites.
AP0152R1
3/4"
ADJUSTMENT
SCREW
ACTUATOR
SHAFT
VALVE
STEM
STEM
ADAPTOR
JAM
NUT
STEM
NUT
ACTUATOR
RETAINER
INCREASE
DECREASE
0
1
Figure 5. Spring Adjustment.
Spring adjustment
The top edge of the stem nut measures the valve
stem position. The “0” marking on the actuator yoke
indicates stem up position. The “1” mark indicates
stem down position.
With the actuator in an upright position and the stem
visible as shown in Figure 5, use a 3/4-inch open
end wrench to turn the adjustment screw.
 For Normally Open Valves: To increase the
start to close pressure, turn the adjustment
screw from right to left. To decrease, turn
the adjustment screw from left to right.
 Normally Closed Valves: To increase the
start to open pressure, turn the adjustment
screw from right to left. To decrease, turn
the adjustment screw from left to right.
NOTE: As the line pressure differential across the
valve increases, the spring span will
decrease.
The installation is now complete.