4" dia. - Manual (Half) Blast Gate - Industrial Grade

BLUEFIN, Half blast gates (also called cut-offs or waste gates) are used to open and close branch ducts in a system allowing air to be diverted only to machines that are operating, thus conserving air volume.  Sliding galvanized blade features a locking screw for full volume control including balancing.  Bluefin manual half-gates are sand-cast high quality industrial grade.