Overview
The Belimo SY4-220 is a 230V AC non-fail-safe electric valve actuator engineered for fast 20-second floating/3-point control of quarter-turn valves.
Features
- Rapid 20-second motor drive speed for fast valve positioning
- Integrated dual SPDT limit switches for feedback and interlocks
- Heavy-duty IP66/67 and NEMA 4X housing protects internal gear train and electronics
- Easy terminal block wiring interface
Specifications
- Actuator Type: Non fail-safe
- Control Type: Floating / 3-point
- Nominal Voltage: AC 230 V
- Running Time (Motor): 20 s
- Auxiliary Switches: 2 x SPDT
- Degree of Protection: IP66/67, NEMA 4X
Applications
- Industrial quarter-turn valve automation requiring 230V supply and fast actuation
- Chilled water isolation, process loops, and HVAC plant automation


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