the Auburn H4-12-12PK is designed for industrial applications

it is a standard component in several Allied Air brands

Engineered for technical reliability in boiler return piping

this precision-machined HVAC blower shaft replacement ensures minimal runout and vibration

Universal Compatibility: Field-replaceable for most IP

Siemens Building Technology 331-3012 320788-704 the Auburn H4-12-12PK is designedThe Siemens 331 3012 is a heavy duty #6 pneumatic damper actuator designed for high torque applications in commercial HVAC systems. This spring return actuator features a 4 inch stroke and a nominal 3 8 psi spring range, making it an ideal choice for the gradual or positive control of large dampers, centrifugal refrigeration inlet vanes, and fire smoke dampers. Built with a rugged, metal fabricated housing and a 17. 9 sq. in. effective diaphragm area,