Overview of Primary Product

VBN THREADED CONTROL BALL VALVES AND ACTUATORS
63-4378—08 8
Spring Return 3 Nm Diamond
APPLICATION
MS7103 and MS3103 Spring Return Direct Coupled
Actuators (DCA) are used within heating, ventilating and
air-conditioning (HVAC) systems. They can drive a variety
of quarter-turn, final control elements requiring spring
return fail-safe operation.
FEATURES
• Brushless DC submotor with electronic stall
protection
• Self-centering shaft adaptor (shaft coupling) for wide
range of shaft sizes
•Fast test mode
• MS7103 models for use with 2-10 Vdc control
• MS3103 models for use with Sylk-enabled controllers
• Models available with two internal end switches
• Durable plastic housing with built-in mechanical end
limits
• Spring return direction field selectable
• Shaft position indicator and scale
• UL (cUL) listed and CE compliant
• Plenum rated actuator and control/power cable
SPECIFICATIONS
Actuator Type: Damper; Valve
Rotational Stroke: 95 ±3 degrees
Fail Safe Mode: Spring Return
Torque: 27 lb-in. (3 Nm)
Spring Return Torque: 27 lb-in (3 Nm)
Spring Return Direction: By orientation
External Auxiliary Switches Available: No
Cable Specification:
Power Cable: Plenum Rated, 3 ft (0.914 m) length from end
of access cover, 18 AWG
Switch Cable: Appliance Rated, 3 ft (0.914 m) length from
end of access cover, 18 AWG
Ingress Protection Rating: IP54
Environmental Rating: NEMA 2
Frequency: 50 Hz; 60 Hz
Mounting: Direct Coupled
Maximum Noise Rating, Driving (dBA @ 1m): < 40
Maximum Noise Rating, Spring Return (dBA @ 1m): < 65
Rotational Stroke Adjustment: Mechanically limited
7.5 degree increments
Compatible Damper Shafts: 3/8 to 3/4 in. round or 1/4 to
1/2 in. square (9 to 19 mm round or 6 to 13 mm square)
Shaft Adapter Type: U-bolt
Materials: Plenum rated plastic housing
Operating Humidity Range (% RH): 5 to 95% RH, non-
condensing
Ambient Operating Temperature: -40 F to +150F (-40 C
to +65 C)
Shipping and Storage Temperature: -40 F to +150F (-40 C
to +65 C)
Weight: 1.7 lb (0.78 kg)
Approvals
UL60730
IEC 60730-1 and Part 2–4
UL1097 for Double Insulation
CE Certification Low Voltage Directive 2014/35/EU
CE EMC 2004/108/EC
Switch cables are UL certified only
Fig. 3. Dimensions in in. (mm).
M37351
2-7/8 (73)
6-1/2
(165)
5-3/8
(137)
3-1/8 (79)
3-1/8 (79)
7
(178)
3-17/64 (83)
1-9/16
(40)
FOR 1/2 INCH SHAFT.