Overview
The Belimo SY8-110 is a non-fail-safe electric valve actuator designed for high-torque rotary applications in commercial and industrial HVAC systems. It provides reliable on/off and floating point control for butterfly valves and large control valve assemblies.
Features
- High-torque rotary actuation with non-fail-safe operation
- Integrated dual SPDT auxiliary switches for position feedback
- NEMA 4X and IP66/IP67 rated enclosure for harsh environments
- Terminal connection for straightforward field installation
- Manual override feature for emergency or commissioning operation
Specifications
- Nominal Voltage: AC 120 V
- Control Type: On/Off, Floating/3-point
- Auxiliary Switches: 2 x SPDT
- Angle of Rotation: 90°
- Running Time: 51 s
- Degree of Protection: IP66/IP67, NEMA 4X
- Actuator Type: Non fail-safe
Applications
- Control of butterfly valves in commercial HVAC systems
- Chiller isolation and cooling tower control
- Water distribution and large air handler system modulation


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