Filter cartridge apparatus

摘要

A filter cartridge apparatus is provided for a respirator. The apparatus contains a wettable filter medium for use with a respirator in order to filter tritium, the filter medium being wetted when in use. The apparatus is also mountable to a cartridge containing a separate HEPA or other filter that is typically maintained in a dry state. Thus, a single unit containing both wet and dry filter media is provided for mounting to a respirator so that tritium or tritium water vapor and particulate contaminants can be filtered at the same time.

主权项

1. A filter cartridge apparatus for use in filtering tritium or tritium water vapor, comprising:
a shell comprising an air-permeable base at an inlet end and defining an edge at an outlet end, the shell containing a wettable filter medium; and a cap adapted to engage the outlet end of the shell, the cap comprising:
a cover plate comprising an outlet;an adaptor portion surrounding the outlet;a skirt depending from the cover plate, the skirt comprising a recess defined by a shoulder extending inwardly from an interior face of the skirt; and a gasket mounted in the recess, the gasket being interposed between the edge of the shell outlet end and the shoulder to provide a substantially airtight seal between the cap and the edge of the shell outlet end when the cap and shell are engaged, the gasket permitting air flow from the inlet end of the shell to the outlet of the cap, the adaptor portion being adapted for mounting to a separate filter cartridge such that the outlet is substantially aligned with an inlet of the separate filter cartridge.