Model NPR-BI pressure relief door negative pressure relief - "blow in"

Application

The NPR-BI pressure relief doors are designed to open inward to prevent damage to ductwork under excessive negative pressure. The NPR-BI mounts vertically and must be properly secured and sealed to the ductwork by welding or with high pressure sealing cement and screws or rivets.

Documents

Product Sheets

NPR-BI
NPR-BI