Honeywell Low Force Damper Actuator w/ Spring Return for Unit Ventilators (4 to 8 psi)

Used to control the damper on unit ventilators. Can be adapted to various unit ventilator control cycles. Replacement devices are available for Johnson, Powers, Robertshaw, Barber-Colman, and older Honeywell unit ventilator damper actuators. Features Constructed of strong zinc die castings. Hesitation feature available for unit ventilator cycles requiring a minimum percentage of outdoor air. Specifications Stroke: 2-1/8" to 2-1/2" Diaphragm Effective Area (sq in.): 11" Maximum Safe Operating Pressure (psi): 25 PSI