MSxx03 27 lb-in. and MSxx05 44 lb-in. Spring Return Direct Coupled Actuators

MS3103, MS3105, MS4103, MS4105, MS7403, MS7405, MS7503, MS7505, MS8103, MS8105 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.

Applications include volume control dampers, mounted directly to the drive shaft or remotely (with the use of accessory hardware), quarter-turn rotary valves, such as ball or butterfly valves mounted directly to the drive shaft and linear stroke globe or cage valves mounted with linkages to provide linear actuation.

• Brushless DC submotor with electronic stall protection on all models
• Self-centering shaft adaptor (shaft coupling) for wide range of shaft sizes
• Models available for use with two-position, SPST, line- or low-voltage controls
• Models available with combined floating and modulating control in a single device
• Models available with an internal end switch
• Access cover to facilitate connectivity
• Durable plastic housing with built-in mechanical end limits
• Spring return direction field selectable
• Shaft position indicator and scale
• Integral 1/2 in. NPSM conduit connection on some models

• UL (cUL) listed
• CE EMC 2004/108/EC
• CE Certification Low Voltage Directive 2006/95/EC
• IEC 60730-1 and Part 2-14
• C-Tick N314
• Plenum rated per UL873
• UL1097 for Double Insulation