or intermittent pressure switch faults

spring-return zone actuator engineered for reliable performance in critical HVAC hydronic applications

This part number refers specifically to the venter wheel and disc

and WeatherKing gas furnaces to ensure proper voltage draw and heat output

Siemens Building Technology 331-4811 Actuator 320720-756 or intermittent pressure switch faultsFor veteran technicians managing air handler units and mixing boxes, the Siemens 331 4811 represents the industry standard for pneumatic reliability. This No. 3 Pneumatic Damper Actuator is engineered with a rugged, all metal body designed to withstand the harsh environments of mechanical rooms. Operating on a nominal 8 to 13 psi spring range, this unit provides precise, gradual, or positive actuation of HVAC dampers and air valves. The 331 4811