Gasket seal for filter unit

Details Gasket seal for filter unit Gasket seal for filter unit

1999-03-22

2000-09-12

Simmons, David A.

Gas separation

Combined or convertible

In environmental air enclosure

55355, 55502, 55508, 454187, B01D 4652

Patent

active

061172022

ABSTRACT:
A filter and frame arrangement, e.g., a HEPA type filter/blower unit, has an arrangement for sealing the filter in place to prevent contaminants from leaking around the filter. A secondary seal, e.g., in the form of a gasket, both holds the filter in place in the unit and also seals the space between the primary seal (e.g., gel seal) and the clean space. An extruded gasket seats into a peripheral recess in the frame. This can be removed when the filter needs to be changed out so the filter can be taken out from below and replaced. Then a replacement seal is installed after the new HEPA filter is in position. The gasket seal is as close as possible to the bottom of the frame, i.e., as close to the clean space, so that possible contaminants are prevented from falling into the space below. Instead of an elastomeric gasket, a spring metal gasket can be used, with caulking.

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