Siemens Building Technology 331-4825 Actuator 318973-401 One-pipe steam systems require a

One-pipe steam systems require a specialized air vent valve to function correctly

reliable performance in 40°C ambient environments

Plug-and-Play Compatibility: Features factory-matched wiring harnesses for reduced installation time on the job site

if the internal slide is physically stuck or leaking

By utilizing a 1/8 inch NPT air connection

Siemens Building Technology 331-4825 Actuator 318973-401 One-pipe steam systems require aThe Siemens 331 4825 is a rugged, metal fabricated No. 3 Pneumatic Actuator engineered for reliable performance in demanding commercial HVAC environments. Designed for the precise modulation of air valves and dampers, this unit features a 8 13 psi nominal spring range and a versatile 2 3 4 inch stroke. Built with an all metal body and an ozone resistant rubber rolling diaphragm, it provides consistent force for both two position and modulating