Description
The Belimo SY3-110 is a high-torque non spring return valve actuator designed for reliable on/off control in industrial and HVAC valve applications. Operating on 120 V AC, it delivers substantial torque output and is housed in a rugged NEMA 4H enclosure for harsh environments.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Belimo |
| Category |
Valve Actuators |
| Part Number |
SY3-110 |
| Subcategory |
Non-Spring Actuators |
| Actuator Type |
Non spring return |
| Control Input |
On/Off |
| Nominal Voltage |
AC 120 V |
| Torque Output |
1335 in-lb |
| End Switch |
Yes |
| Housing Rating |
NEMA 4H (NEMA 4X equivalent) |
| Application Type |
Valve actuator |
| Replacement Series |
PR Series |
| Weight |
22.10 lb |
Information About SY3-110
The SY3-110 is part of Belimo’s legacy heavy-duty valve actuator lineup developed for high-torque on/off valve control. It is engineered to deliver 1335 in-lb of torque, making it suitable for large or high-resistance valve assemblies. The actuator operates on 120 V AC power and includes integrated end switches for position indication and control interlocking. Designed with a NEMA 4H enclosure, it provides strong protection against moisture, dust, and harsh industrial conditions, and has since been replaced by the Belimo PR Series.
Key Features
- High Torque Valve Actuation: Provides 1335 in-lb of torque to reliably operate large industrial and HVAC control valves.
- Non Spring Return Design: Maintains the last commanded valve position during power loss for stable system behavior.
- On Off Control Operation: Designed for straightforward open and close valve control in automation and isolation applications.
- Integrated End Switches: Built-in end switches support valve position feedback and control system interlocking.
- Rugged NEMA 4H Enclosure: Heavy-duty housing offers protection against dust, moisture, and wash-down environments.
- Line Voltage Power Supply: Operates directly on 120 V AC without the need for additional control transformers.
- Legacy Belimo Platform: Recognized as a predecessor to the current Belimo PR Series actuators.
The SY3-110 delivers the reliability and precision required for high-torque on/off valve control in demanding industrial and HVAC environments.
