Siemens Building Technology SSD81U Actuator
The Siemens SSD81U Actuator is a 24V 3-position floating actuator engineered for precise control of Pressure Independent Control Valves (PICV). This non-spring return (NSR) electromotoric actuator high-torque performance, delivering 56 lbs (250 N) of nominal force to ensure accurate valve positioning in rigorous HVAC applications. Designed for seamless integration with 1/2-inch to 1-1/4-inch valves, it utilizes a direct-coupled installation that enables mounting on threaded valve bonnets without specialized tools, streamlining field replacement and system commissioning.
This 24 VAC linear actuator features a 2.5 mm or 5 mm stroke capability and is UL listed for plenum installation. Its fail-in-place logic ensures the actuator holds its last position during power loss, while the manual override and visual position indicator allow for quick troubleshooting and mechanical adjustments on-site. With a low power consumption of 0.8 VA in normal operation, the Siemens SSD81U is an efficient choice for chilled water, hot water, and glycol systems, providing technicians with the reliability required for critical building automation and hydronic control setups.
Key Benefits- Efficient Field Installation: Direct-coupled design allows for hand-tightened mounting, eliminating the need for complex tool sets.
- Reliable Fail-State: The non-spring return mechanism holds the valve in its current position upon power failure to maintain system stability.
- Plenum Rated Safety: Meets UL873 standards for safe installation within air handling plenums.
- Low Operating Overhead: Minimal 0.8 VA power consumption reduces the calculation load on 24V Class 2 transformers.
- Does the SSD81U self-calibrate? No, unlike the SSD61U, this floating model does not feature automatic stroke calibration and relies on the controller's timing signal.
- Can it be installed in any orientation? Vertical mounting is recommended; however, it can be installed in other orientations provided it is not upside down to prevent moisture ingress.
- What control signal is required? This unit requires a 24 VAC floating (3-point) control signal across terminals Y1 and Y2 for extension and retraction.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $98.57
-65%$98.57
$34.50Siemens Building Technology SSD81U Actuator
The Siemens SSD81U Actuator is a 24V 3-position floating actuator engineered for precise control of Pressure Independent Control Valves (PICV). This non-spring return (NSR) electromotoric actuator high-torque performance, delivering 56 lbs (250 N) of nominal force to ensure accurate valve positioning in rigorous HVAC applications. Designed for seamless integration with 1/2-inch to 1-1/4-inch valves, it utilizes a direct-coupled installation that enables mounting on threaded valve bonnets without specialized tools, streamlining field replacement and system commissioning.
This 24 VAC linear actuator features a 2.5 mm or 5 mm stroke capability and is UL listed for plenum installation. Its fail-in-place logic ensures the actuator holds its last position during power loss, while the manual override and visual position indicator allow for quick troubleshooting and mechanical adjustments on-site. With a low power consumption of 0.8 VA in normal operation, the Siemens SSD81U is an efficient choice for chilled water, hot water, and glycol systems, providing technicians with the reliability required for critical building automation and hydronic control setups.
Key Benefits- Efficient Field Installation: Direct-coupled design allows for hand-tightened mounting, eliminating the need for complex tool sets.
- Reliable Fail-State: The non-spring return mechanism holds the valve in its current position upon power failure to maintain system stability.
- Plenum Rated Safety: Meets UL873 standards for safe installation within air handling plenums.
- Low Operating Overhead: Minimal 0.8 VA power consumption reduces the calculation load on 24V Class 2 transformers.
- Does the SSD81U self-calibrate? No, unlike the SSD61U, this floating model does not feature automatic stroke calibration and relies on the controller's timing signal.
- Can it be installed in any orientation? Vertical mounting is recommended; however, it can be installed in other orientations provided it is not upside down to prevent moisture ingress.
- What control signal is required? This unit requires a 24 VAC floating (3-point) control signal across terminals Y1 and Y2 for extension and retraction.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Siemens SSD81U Actuator is a 24V 3-position floating actuator engineered for precise control of Pressure Independent Control Valves (PICV). This non-spring return (NSR) electromotoric actuator high-torque performance, delivering 56 lbs (250 N) of nominal force to ensure accurate valve positioning in rigorous HVAC applications. Designed for seamless integration with 1/2-inch to 1-1/4-inch valves, it utilizes a direct-coupled installation that enables mounting on threaded valve bonnets without specialized tools, streamlining field replacement and system commissioning.
This 24 VAC linear actuator features a 2.5 mm or 5 mm stroke capability and is UL listed for plenum installation. Its fail-in-place logic ensures the actuator holds its last position during power loss, while the manual override and visual position indicator allow for quick troubleshooting and mechanical adjustments on-site. With a low power consumption of 0.8 VA in normal operation, the Siemens SSD81U is an efficient choice for chilled water, hot water, and glycol systems, providing technicians with the reliability required for critical building automation and hydronic control setups.
Key Benefits- Efficient Field Installation: Direct-coupled design allows for hand-tightened mounting, eliminating the need for complex tool sets.
- Reliable Fail-State: The non-spring return mechanism holds the valve in its current position upon power failure to maintain system stability.
- Plenum Rated Safety: Meets UL873 standards for safe installation within air handling plenums.
- Low Operating Overhead: Minimal 0.8 VA power consumption reduces the calculation load on 24V Class 2 transformers.
- Does the SSD81U self-calibrate? No, unlike the SSD61U, this floating model does not feature automatic stroke calibration and relies on the controller's timing signal.
- Can it be installed in any orientation? Vertical mounting is recommended; however, it can be installed in other orientations provided it is not upside down to prevent moisture ingress.
- What control signal is required? This unit requires a 24 VAC floating (3-point) control signal across terminals Y1 and Y2 for extension and retraction.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
