SQM50.264R1Z3R Siemens Damper Motor

Overview

The Siemens SQM50.264R1Z3 is a high-precision reversing actuator designed for the accurate positioning of air and gas dampers, flow control valves, and butterfly valves in medium to large-capacity oil and gas burners. Engineered for industrial and commercial applications, this damper motor features a robust die-cast aluminum housing and a synchronous motor that ensures constant speed and repeatable performance. Its modular design allows for extensive customization through exchangeable circuit boards and shaft options, making it a versatile solution for complex combustion control systems.

Features

• High-performance synchronous motor with reversible operation and locking-proof protection
• Multi-input compatibility, accommodating control signals such as 4 to 20 mA, 0 to 135 Ohms, 0 to 10 Vdc, and 0 to 20 mA
• Integrated auto/manual selector switch and manual forward/reverse toggle switch for easy field adjustments
• Separately adjustable drive shaft and camshaft via independent clutches for simplified commissioning
• Externally visible shaft position indicator for quick status monitoring
• Durable design with a maintenance-free gear train and high-quality aluminum housing
• Support for up to six internal, easily accessible auxiliary switches for flexible control logic

Specifications

• Model: SQM50.264R1Z3
• Torque: 90 in-lbs (10 Nm)
• Running Time: 8 seconds for 90-degree travel
• Operating Voltage: 110 Vac (60 Hz) / 120 Vac (50 Hz)
• Rotation: Clockwise (CW) default, field reversible
• Shaft Type: 3/8 inch square shaft
• Protection Rating: Designed for industrial environments, often used in NEMA 4 configurations with kits
• Certifications: UL and CSA approved

Applications

• Load-dependent control of combustion air, gas, and oil in industrial burner systems
• Precise positioning of air dampers in large-scale HVAC ventilation systems
• Modulation of butterfly valves and flow control valves in process heating applications
• Integration with Siemens burner controls (e.g., LMV5, LME series) for safety-critical combustion cycles
• Replacement of competitive actuators in commercial boiler plants and thermal oxidizers