All-thermoplastic rectangular damper is flanged and can be mounted to a wall, allowing entry and exit, or flanged to a duct system to control air volumes. The unit can be set for manual activation or fitted with electronic or pneumatic actuators to control blade positions. Constructed from homogeneous, high strength, resilient material, the damper fromTri-Mer Corp.resists mechanical damage and corrosion.
November 2000, RS# 219
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