Description
The Belimo SY3-24MFT is a high-torque non spring return valve actuator designed to deliver 1335 in-lb of output for precise control of large hydronic valves. It operates on AC/DC 24 V power and features MFT programmable control to support multiple signal types and operating modes.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Belimo |
| Category |
Control Valves |
| Part Number |
SY3-24MFT |
| Subcategory |
Valve Actuators |
| Actuator Type |
Non spring return |
| Nominal Voltage |
AC 24 V / DC 24 V |
| Nominal Frequency |
50/60 Hz |
| Control Technology |
MFT programmable |
| Control Modes |
2…10 V, 4…20 mA, PWM, On/Off, Floating Point |
| Input Impedance |
500 Ω (4…20 mA), 1500 Ω (PWM) |
| Torque Output |
1335 in-lb |
| Electrical Protection |
Double insulated |
| Housing Rating |
NEMA 4X |
| Application Type |
Valve actuation |
| Servicing |
Maintenance-free |
| Weight |
30.0 lb |
Information About SY3-24MFT
The SY3-24MFT is part of Belimo’s heavy-duty actuator range developed for precise control of large valves in demanding HVAC and hydronic systems. It incorporates Belimo’s MFT multi-functional technology, allowing field configuration of control signals and operating behavior to match system requirements. The actuator is designed for non fail-safe applications where continuous powered positioning is required, providing stable torque output across its operating range. A rugged NEMA 4X enclosure protects internal components, supporting installation in harsh indoor or outdoor environments.
Key Features
- High Torque Valve Actuation: Delivers 1335 in-lb of torque to reliably drive large control valves in high-demand hydronic applications.
- Non Spring Return Operation: Provides powered positioning without a fail-safe spring, suitable for systems where return on power loss is not required.
- MFT Programmable Control: Supports multiple control modes including 2…10 V, 4…20 mA, PWM, on/off, and floating point for broad system compatibility.
- Configurable Input Impedance: Optimized impedance values support stable signal processing for current loop and PWM control schemes.
- AC And DC Power Compatibility: Operates on both 24 VAC and 24 VDC supplies to simplify system design and power distribution.
- Rugged NEMA 4X Housing: Sealed enclosure protects against moisture, dust, and corrosion in challenging mechanical room or outdoor installations.
- Maintenance-Free Design: Engineered for long service life with minimal servicing requirements.
The SY3-24MFT delivers the reliability and precision required for high-torque valve control in advanced HVAC and hydronic systems.
