Siemens Building Technologies SKD Valve Actuator Data Sheet
Siemens
Product Guard
Warranty
SKD Valve Actuator
24 Vac, Proportional Control
0 to 10 Vdc or 4 to 20 mA
Spring Return or Non-Spring Return
Flowrite Globe
Flowrite SKD Valve Actuator.
Description
Designed for use with the Flowrite and other standard
valves with a 3/4" (20 mm) stroke, the Flowrite SKD
Electronic Valve Actuator receives a 0 to 10 Vdc or
4 to 20 mA control signal to proportionally control the
valve. The spring return actuators are available with
standard or advanced functionality.
Features
Standard Features
Part nos. with U sufx have these standard features:
• Direct-coupled installation requires no special tools
or adjustments
• Visual and electronic stroke indication
• Die-cast aluminum housing
• 250 lb. (1150 N) nominal force
• 0 to 10 Vdc or 4 to 20 mA
• Integral position feedback
• Manual override
• Spring return or non-spring return
• Maintenance-free
Advanced Features (Spring return only)
Part nos. with UA sufx have standard features, plus these
advanced features:
• Adjustable start and span
• Stroke limit control
• Selectable operation direction (direct or reverse acting)
• Choice of linear or equal percentage ow
characteristics
• Designed to be used with other manufacturer’s valves
with the appropriate Universal Valve Retrot Kit
Applications
The Flowrite SKD Electronic Valve Actuator requires
a 24 Vac supply and is designed to be used with
Flowrite and other standard valves in liquid and
steam service applications.
Siemens
Product Guard
PLUS 3 Warranty
www.usa.siemens.com/hvac
A-187
Valves
SKD Actuator Specifications
A-188
Valves
Operating Voltage ............................................................... 24 Vac ±20%
Frequency .................................................................................. 50/60 Hz
Power Consumption ............................................................ 17 VA (12 W)
Control Signals
Control Input (Y)
Voltage............................................................................. 0 to 10 Vdc
Current.............................................................................. 4 to 20 mA
Control Input (R)
Resistance ................................................................ 0 to 1000 Ohms
Voltage................................................................................0 to 1.6 V
Position Feedback Output (U)
Voltage............................................................................. 0 to 10 Vdc
Max. Current ...................................................................0.5 mA max.
Position Feedback Output (U)
Current.............................................................................. 4 to 20 mA
Max. Impedance ................................................................ 250 Ohms
Function
Nominal Stroke ..................................................................3/4" (20 mm)
Run Time with Control Operation (Full Stroke)
Pushing Stroke, 0 to 100% ..................................................... 30 sec.
Pulling Stroke, 100 to 0% ....................................................... 15 sec.
Nominal Force
NC and 3-way Upper
Stroke ....................................................................................... 0%
Force ..................................................................225 lbs. (1000 N)
NO and 3-way By Pass
Stroke ................................................................................... 100%
Force .................................................................. 258 lbs. (1150 N)
Agency Approvals ........... UL873, cUL, CSA C22.2 No. 24-93, CE N474
Operating
Ambient Temperature ...................................... 5 to 130°F (-15 to 55°C)
Media Temperature ..................................... 14 to 300°F (-10 to 150°C)
Conduit Opening ....................................................................1/2" NPSM
Housing ................................................................ NEMA 1 (Interior Only)
SKD Actuator Product Ordering
Description Part No.
24 Vac, Proportional Control, Non-Spring Return SKD60U 267
24 Vac, Proportional Control, Spring Return SKD62U 274
24 Vac, Proportional Control with Advanced Features, Spring Return SKD62UA —
Ordering Note:
The SKD62UA can be used with other manufacturer’s valves with the appropriate Universal Valve Linkage Kit.
Actuator Prex Code
Dimensions
Dimensions shown in inches (mm).
Height of Actuator H
11-13/16" (300 mm) 19-3/4" (430 mm) 6-5/8" (170 mm) Width 14-1/2" (360 mm)
Table Note:
Service height and width are the recommended dimensions to allow access to the product.
1
Service Height H Width/Diameter of Actuator W
1
Service Width W
Accessories & Service Kits
www.usa.siemens.com/hvac
A-257
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