SQM50.260R1G4 Siemens Actuator

Overview

The Siemens SQM50.260R1G4 is a high-precision reversing actuator designed for the accurate positioning of air and gas dampers, butterfly valves, and flow control valves. Engineered for both industrial and commercial burner applications, this electromotive actuator provides reliable rotary motion and is particularly well-suited for systems requiring high modulating accuracy and repeatability. Its modular design features exchangeable circuit boards and adjustable auxiliary switches, allowing for flexible integration into complex combustion control systems.

Features

• Equipped with six internal, easily accessible SPDT switches, including two limit switches and four auxiliary switches
• Integrated auto/manual selector and manual forward/reverse toggle switches for simplified commissioning and adjustment
• Low hysteresis drive mechanism with a double-offset design and potentiometer gearing for precise rotational resolution
• Disengagement clutches for the drive shaft and camshaft allow for quick manual alignment during setup
• Externally visible position indicator provides clear status monitoring of the shaft location
• Durable construction suitable for mounting in any orientation to accommodate various installation requirements

Specifications

• Torque: 90 lb-in (10 Nm)
• Running Time: 8 seconds for 90 degrees at 60 Hz (10 seconds at 50 Hz)
• Operating Voltage: 110-120 VAC, 50/60 Hz
• Control Input: 4 to 20 mA steady signal
• Shaft Design: No shaft included (must be ordered separately; supports various interchangeable designs)
• Rotational Direction: Counterclockwise (CCW) standard
• Internal Potentiometer: 1000 Ohm, 135-degree range (ASZ12.833)
• Approvals: UL recognized, CSA certified, and CE approved

Applications

• Precise positioning of air dampers and gas butterfly valves in industrial process heating
• Control of combustion air and fuel ratios in commercial and industrial burner systems
• Integration with flow control valves for modulating accuracy in HVAC and boiler applications
• Multi-fuel burner systems utilizing auxiliary switches for separate ignition and fire positions
• Suitable for use as a component by Original Equipment Manufacturers (OEMs) in specialized combustion equipment