Description
Overview
The Siemens SAX81.03U is a heavy-duty electric valve actuator engineered for precise control in commercial HVAC and building automation systems. Designed to operate on both 24 Vac and 24 Vdc power supplies, this non-spring-return actuator uses floating (three-point) control to deliver smooth, reliable valve positioning across a wide range of hydronic and chilled-water applications.
Key Features
- Floating (three-point) control signal for accurate valve positioning
- Compatible with 24 Vac and 24 Vdc power supplies
- Non-spring-return design — valve holds last position on power loss
- Designed for use with Siemens valve bodies in commercial HVAC systems
- Suitable for hydronic heating, cooling, and chilled-water coil applications
- Compact, robust housing built for long service life
- Easy mounting and wiring for fast field installation
- Part of the Siemens Building Technology actuator family
Application
The SAX81.03U is ideal for use in air handling units, fan coil units, and hydronic systems where dependable valve actuation is required. Its floating control input makes it compatible with a broad range of building automation controllers and DDC systems.
Specifications
- Brand: Siemens Building Technology
- SKU / Part Number: SAX81.03U
- Control Type: Floating (Three-Point)
- Power Supply: 24 Vac / 24 Vdc
- Spring Return: Non Spring Return
- Actuator Type: Electric
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