Damper Controlled Exhaust
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
The opening of an auxiliary vent can be float-controlled to provide emergency exhausting of toxic fumes in the case of a chemical spill. Referring to the figure, low velocity exhausting of fumes from the top of tank 1 is normally accomplished through openings 2, downwardly between the double walls 3, beneath bottom 4 of the tank and out through slot 5 to the exhaust plenum 6. However, if sufficient liquid is spilled, it may rise from the bottom to a level blocking slot 5, preventing adequate exhausting. Therefore, float 7 and hinged damper 8 are provided which are responsive to the liquid level to open auxiliary vent 9.