Siemens 331-2857

Damper Actuator, Pneumatic Number 6, 4” Stroke, 3-8 psi, Pivot Mount, Clevis

This 331 Number 6 Pneumatic Damper Actuator is a rugged, metal-fabricated device that provides gradual or positive actuation of HVAC and fire/smoke dampers. This actuator has a nominal spring range of 3 to 8 psi, is pivot mounted and has a replaceable diaphragm. This actuator has a ⅛” NPT female air connection.

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