Pre-filtration and maintenance sensing for explosion-proof enclosures

摘要

A filter system for an explosion-proof enclosure is described herein. The filter system can include a pre-filter assembly located outside the explosion-proof enclosure. The pre-filter assembly can include a pre-filter material configured to control air passing therethrough. The filter system can also include a filter assembly coupled to the pre-filter assembly. The filter assembly can further control the air received from the pre-filter assembly and passing therethrough into the explosion-proof enclosure.

主权项

1. A filter system, comprising:
an explosion-proof enclosure comprising an aperture, wherein the explosion-proof enclosure is configured to contain an explosion that originates inside the explosion-proof enclosure; a filter assembly coupled to the explosion-proof enclosure and covering the aperture in the explosion-proof enclosure; and a pre-filter assembly located outside the explosion-proof enclosure and covering the filter assembly and the aperture in the explosion-proof enclosure, wherein the pre-filter assembly comprises a reinforcement structure and a pre-filter material disposed over the reinforcement structure, wherein the pre-filter material controls air passing therethrough, wherein the filter assembly receives the air from the pre-filter assembly and further controls the air passing therethrough into the explosion-proof enclosure.