Reduced Standby Loss: Closes the vent when the system is idle

Common symptoms include a weak orange spark instead of a crisp blue arc

it is typically rated for up to 15 HP at 230V and 25 HP at 460V/575V for three-phase applications

Utilizing a direct coupled actuator

the 35-65 series features field-selectable line voltage

Siemens Building Technology 331-4810 Actuator 320735-701 Reduced Standby Loss: Closes theThe Siemens 331 4810 is a rugged, metal fabricated No. 3 Pneumatic Actuator engineered for reliable modulating or two position control of HVAC dampers and terminal units. Built with all metal construction and a totally enclosed housing, this 331 Series actuator is a staple for contractors maintaining mixing box dampers, unit ventilators, and air valves. It features a 2 3 8 inch stroke and a nominal 8 13 psi spring range, allowing for precise