SQM40.174R10SC Siemens Actuator

Overview

The Siemens SQM40.174R10SC is a high-performance electromotoric actuator designed for the precise positioning of air and gas dampers, butterfly valves, and other flow control components in burner systems. Engineered for medium to high-capacity oil and gas burners, this actuator features a synchronous motor and is specifically configured for counterclockwise rotation. Its robust design ensures reliable, load-dependent control of combustion air and fuel, contributing to the safe and efficient operation of thermal process plants.

Features

• Electromotoric operation with a synchronous motor for precise rotary motion
• Counterclockwise (CCW) direction of rotation
• Manual drive shaft disengagement via a coupling pin for easy maintenance or manual override
• Durable construction featuring a die-cast aluminum lower housing and an impact-proof, heat-resistant plastic cover
• Internal position indication with adjustable cams and scales for easy switching point setup
• UL and CSA listed for use in North American industrial and commercial applications
• NEMA 4 rated weatherproof enclosure for protection in harsh environments

Specifications

• Model: SQM40.174R10SC
• Torque: 45 in-lb (approximately 5 Nm)
• Running Time: 15 seconds for a 90-degree rotation (at 60 Hz)
• Operating Voltage: AC 110 V (50/60 Hz)
• Drive Shaft: 3/8 inch Square Shaft
• Rotation Direction: Counterclockwise (CCW)
• Protection Rating: NEMA 4
• Approvals: UL Listed and CSA Certified

Applications

• Load-dependent control of combustion air, natural gas, and oil flow in industrial burners
• Driving butterfly valves and dampers in HVAC and thermal process systems
• Use in emergency systems requiring reliable spring return or motorized actuation
• Integration with 3-position or modulating controllers and burner control systems like the Siemens LMV series