SQM40.244R11SC Siemens Actuator

Overview

The Siemens SQM40.244R11SC is a high-precision electromotoric actuator designed for the accurate positioning of flow control valves, butterfly valves, and dampers in industrial and commercial burner applications. This modulating actuator supports multiple analog input signals and is engineered for counterclockwise (CCW) rotation. Featuring a robust construction with a die-cast aluminum lower housing and an impact-resistant plastic cover, it provides reliable service for load-dependent control of gas, oil, and combustion air in medium to high-capacity thermal process plants.

Features

• Supports multiple control signals including 4-20 mA, 0-135 Ohm, and 2-10 VDC
• Counterclockwise (CCW) direction of rotation
• Equipped with four internal, easily adjustable auxiliary switches
• Integrated drive shaft disengagement clutch for manual alignment and setup
• Internal position indication with scales for precise switching point adjustment
• NEMA 4 rated weatherproof enclosure for protection in demanding environments
• Maintenance-free gear train and stall-proof synchronous motor
• UL and CSA approved for use in North American markets

Specifications

• Torque: 90 in-lb (10 Nm)
• Running Time: 25 to 30 seconds for 90 degrees (at 60 Hz)
• Operating Voltage: AC 110 V – 120 V (50/60 Hz)
• Control Input: 4-20 mA, 2-10 VDC, or 0-135 Ohm
• Shaft Type: 3/8 inch (9.5 mm) square shaft
• Rotation: 90 degree stroke, Counterclockwise
• Potentiometer: Single 90-degree potentiometer included
• Protection Rating: NEMA 4 / IP66
• Operating Temperature: -20 C to +60 C

Applications

• Load-dependent control of gas, oil, and combustion air flow
• Positioning of butterfly valves and dampers in industrial burners
• Used in thermal process plants and medium to large boiler systems
• Suited for applications requiring precise rotary motion and high turndown ratios
• Ideal for integration with Siemens LMV5 or other modulating burner control systems