Installation Instructions
Document No. 129-553
December 22, 2011
SQD Series Valve Actuators
(For use with 1-1/2-inch to 2-inch Pressure Independent
Control Valves)
Item Number: 129-553, Rev. AA
Page 1 of 4
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:
Personal injury/loss of life may
occur if you do not perform a
procedure as specified.
CAUTION:
Equipment damage may occur
if you do not perform a
procedure as specified.
Product Number
Description Actuator
Code
SQD65U
0 to 10 Vdc control
235
SQD85.03U 3-position
(floating) control
234
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.
WARNING:
Disconnect the controller power
before replacing the actuator.
90°
90°
EA1326R1
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.
EA1331R1
M30 x 1.5
1
1
2
1
Figure 2.
2. Disconnect and identify the wires. Place the cover
back on the actuator.
