Overview
The Belimo SY3-120MFT is a non-spring return electric actuator designed for modulating control of industrial and high-torque quarter-turn valves in HVAC and industrial automation applications.
Features
- Multi-Function Technology (MFT) for versatile control signal configuration
- High torque output suitable for large quarter-turn butterfly and ball valves
- Manual override handwheel for operation during power failures or setup
- Internal visual position indicator and built-in limit switches
Specifications
- Nominal Voltage: AC 120 V
- Control Signal: 2 to 10 VDC, 4 to 20 mA, or MFT programmable
- Actuator Type: Non-Spring Return
- Torque: 2600 in-lb [300 Nm]
- Degree of Protection: NEMA 4X / IP67
Applications
- Large industrial valve control in commercial HVAC central plants
- High-torque quarter-turn valve automation in water treatment and process facilities



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