#4 Pneumatic Damper Actuator w/ Fixed Mount for Unit Ventilator (2 to 3 psi, 8 to 13 psi)

Description

The No. 4 Pneumatic Damper Actuator is a totally
enclosed pneumatic piston type actuator designed to
actuate dampers for ventilating systems, mixing box
control, and other applications requiring a large,
effective diaphragm area and long stroke. The No. 4
Hesitation Actuator is frequently used to operate the
outdoor air damper on unit ventilators.

The No. 4 Pneumatic Damper Actuator is recommended for control of outdoor, return
air, exhaust, face and bypass, fan discharge, and static pressure control dampers, as
well as specialized dampers and air valves found in terminal units such as unit
ventilators and mixing boxes.

Features:
All metal body construction
Replaceable, ozone-resistant, EPDM rubber, rolling diaphragm
Pivot mounting for extended shaft or frame mounting
Fixed bracket mounting
Direct front mounting
Positioning relay (optional)
Forward travel stops (optional)
Adjustable hesitation point (hesitation actuator only)