초록 ▼

A three-stage disposable filter cartridge for filtering a gaseous fluid, especially breathable compressed air, and consisting of a preferably cylindrical housing having at least an inlet and an outlet, the interior of the housing being provided with a plurality of concentrically disposed separate ch

A three-stage disposable filter cartridge for filtering a gaseous fluid, especially breathable compressed air, and consisting of a preferably cylindrical housing having at least an inlet and an outlet, the interior of the housing being provided with a plurality of concentrically disposed separate chambers containing different types of filtering media and mutually arranged such that the fluid to be filtered flows sequentially through the individual chambers one after another in a labyrinth-like path. The first chamber contains a filtering medium providing coarse de-humidification of the fluid, the second chamber contains an oil vapor adsorbing medium and the third chamber contains a fine de-humidification medium.

대표청구항 ▼

The method of removing oil and water vapor from breathable compressed air consisting of the steps of passing said compressed air through a first adsorbent filtering medium providing removal of the majority of said water vapor from said compressed air, thereafter passing the thus coarsely de-humidifi

The method of removing oil and water vapor from breathable compressed air consisting of the steps of passing said compressed air through a first adsorbent filtering medium providing removal of the majority of said water vapor from said compressed air, thereafter passing the thus coarsely de-humidified compressed air through a second adsorbent filtering medium providing adsorption removal of oil from said compressed air, and thereafter passing the thus coarsely de-humidified compressed air from which oil has been removed through a third adsorbent filtering medium providing removal of the remaining of said water vapor from said compressed air, whereby said compressed air having passed through said first, second and third adsorbent filtering media in sequence is substantially oil-free and moisture-free and wherein said first, second and third adsorbent filtering media are disposed each in one of three separate chambers in a single housing, at least two of said chambers being concentrically disposed in said housing and said three chambers being placed in serial communication with each other such that the compressed air to be filtered is sequentially circulated through the individual chambers in a labyrinth-like path for providing relatively long filtering travel of said compressed air, said first, second and third adsorbent filtering media being separated by air-pervious separators.