These corrosion-proof PVC Butterfly Dampers are for the construction of exhaust ventilation systems. NOTES: Fittings are triple bead welded. Pictures are to represent style of fittings only; color is gray.
- 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