Siemens Building Technology 331-4825 Actuator 318973-401 Built with a 1/2" NPT

Built with a 1/2" NPT inlet and a 3/4" NPT outlet

By utilizing a 1/8 inch NPT air connection

reliable performance in 40°C ambient environments

this motor is built for vertical mounting positions and provides superior heat dissipation in high-ambient environments

Siemens Building Technology 331-4825 Actuator 318973-401 Built with a 1/2" NPTThe 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