Install Instructions

Document No. 129-214
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. Product or company names mentioned herein may be the
trademarks of their respective owners. © 2009 Siemens Industry, Inc.
Siemens Industry, Inc.
Building Technologies Division
1000 Deerfield Parkway
Buffalo Grove, IL 60089-4513
U.S.A.
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Document No. 129-214
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Page 3 of 3
Installation, Continued
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 6, use a 1-1/16 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 increase.
The installation is now complete.
AP0170R1
ADJUSTMENT
SCREW
ACTUATOR
SHAFT
VALVE
STEM
JAM
NUT
STEM
NUT
ACTUATOR
RETAINER
INCREASE
DECREASE
1-1/16"
0
1
Figure 6. Spring Adjustment.