POSITIVE PRESSURE/NEGATIVE PRESSURE-CORRESPONDING DIFFERENTIAL PRESSURE ADJUSTING DAMPER

摘要

PROBLEM TO BE SOLVED: To provide a positive pressure/negative pressure-corresponding differential pressure adjusting damper enabling use of a chamber either in positive pressure or in negative pressure. SOLUTION: A damper body, having a valve to be opened and closed by a differential pressure, is provided in the chamber subjected to pressure control of air. The damper body is rotated by a rotary shaft in a reversing guide to be easily switched to positive pressure or negative pressure with respect to an atmospheric pressure.