This NEW barametric by-pass damper is a single blade, counter balanced weighted damper that operates on air pressure in order to control the flow of by-pass air. the RTB has an adjustable arm and weight to maintain the correct amount of pressure in the duct system.
Can be mounted in both horiztonal & verticle positions for either up flow or down flow systems.
*Order as RTBdd
Sizes: 8″, 10″, 12″, 14″, 16″