Manufacturer Name: Siemens Building Technology Product Number: S55180-A158 OEM Part Number: S55180-A158 Product Description: 24Vac 0-10 Vdc Signal Nsr No Weight:0.74lbs/335.66g Siemens S55180-A158 Electronic Zone Valve Actuator is a precise device assigned for regulating water (and fluids) flow in HVAC systems. The valve position is controlled by a 0–10V ... https://www.partshnc.com/s55180-a158-siemens-building-technology-24vac-0-10-vdc-signal-nsr-no