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SQD Series Valve Actuators
(For use with 1-1/2-inch to 2-inch Pressure Independent
Control Valves)
Product Description
The SQD Actuator requires a 24 Volt power supply
and a 0 to 10Vdc or floating signal to control the
Siemens 1-1/2 inch and 2-inch 599 Series Pressure
Independent Control Valves with 1/4-inch (6.5 mm)
stroke.
Warning/Caution Notations
WARNING:
CAUTION:
Product Number
Description
SQD65U
0 to 10 Vdc control
SQD85.03U
3-position (floating) control
Required Tools
•
1-1/4-inch open end wrench
•
#2 Phillips or flat-blade screwdriver
•
Flat-blade calibration screwdriver (3 mm) for
Wiring connections
•
Wire cutter/stripper
Estimated Installation Time
•
15 minutes for wiring a factory-installed
actuator.
•
30 minutes for field replacement of actuator.
Prerequisites
WARNING:
If mounting the actuator to a valve
already in line, either close the shut-off
valves in the piping (upstream first,
then downstream) or switch off the
pump to allow the differential pressure
in the valve to drop.
Item Number: 129-553, Rev. AA
Personal injury/loss of life may
occur if you do not perform a
procedure as specified.
Equipment damage may occur
if you do not perform a
procedure as specified.
Actuator
Code
235
234
Installation Instructions
Document No. 129-553
WARNING:
Disconnect the controller power
before replacing the actuator.
90°
Figure 1. Acceptable Mounting Positions with Valve.
NOTE: Vertical mounting is recommended.
Instructions
If you are mounting an actuator on a new valve, begin
with the instructions, Mounting an Actuator to a Valve.
Remove Actuator from Valve
1. Remove the actuator cover using either a #2
Phillips or a #2 flat blade screwdriver.
See Figure 2.
1
Figure 2.
2. Disconnect and identify the wires. Place the cover
back on the actuator.
December 22, 2011
90°
1
2
M30 x 1.5
Page 1 of 4
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Summary of Contents for Siemens SQD Series
- Page 1 The SQD Actuator requires a 24 Volt power supply before replacing the actuator. and a 0 to 10Vdc or floating signal to control the Siemens 1-1/2 inch and 2-inch 599 Series Pressure 90° 90° Independent Control Valves with 1/4-inch (6.5 mm) stroke.
- Page 2 R–M jumper. See Wiring. 7. Place the cover on the actuator. The positioning knob must be at “0” to fit into the shaft. If the cover does not fit, turn it 180 degrees. Figure 5. Page 2 of 4 Siemens Industry, Inc.
- Page 3 Figure 10. SQD85.03U Wiring. input to 300 ohms (30%) results in a position of 50% 24 Vac operating voltage (system potential) stroke. Y1 Output shaft extends, valve opens Y2 Output shaft retracts, valve closes Siemens Industry, Inc. Page 3 of 4...
- Page 4 4 inch (100 mm) 8 inch (200 mm) Figure 12. SQD Series Dimensions in Inches (Millimeters). 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. Product or company names mentioned herein may be trademarks of their respective owners.
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