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Always verify the flow arrow on the casting during installation
Durable Construction: The nickel-plated brass body provides excellent corrosion resistance in closed-loop hydronic environments
This part is critical for maintaining the safety loop in high-efficiency heating systems
OEM-Grade Reliability: Built to meet rigorous industrial specifications for long-term performance in demanding HVAC environments
Siemens Building Technology S55180-A157 Control 322055-301 Always verify the flow arrowThe Siemens Building Technology S55180 A157 is a heavy duty SSE Series electronic actuator engineered for precise 0 10V modulation in commercial HVAC systems. This 24VAC non spring return (NSR) unit is designed for normally closed (NC) operation, making it a reliable solution for modulating airflow or hydronic flow when paired with compatible 599 Series zone valves. With a 1 10 inch (2. 5 mm) stroke and a fast 12. 5 second positioning time, it
