Description
PVC 1120, ASTM D-1784, Type 1, Grade 1, Cell Class 12454-B
ll internal parts are PVC including the body, damper plate & shaft
Butterfly (balancing) dampers are furnished with a locking quadrant, to permanently position
Damper allows for less than 5% air flow restriction when open & an approximate 95% seal when closed
Can be installed either vertically or horizontally
Temperature range: 33°F to 140°F
