Abstract: A membrane air drier utilizes an orifice to serve as the sweep air inlet with a sweep diffuser placed a short distance from the orifice. Preferably, an open channel extends from the product end of the membrane module on the shell side of the fibers with a porous diffuser at one end of the open channel and an orifice at the other end of the channel.

Abstract: A method and apparatus for the removal of free, emulsified, or dissolved water from liquids of low volatility, such as oil, is shown. The liquid of low volatility is removed by contacting the fluid stream of concern with one side of a semi-permeable membrane. The membrane divides a separation chamber into a feed side into which the stream of fluid is fed, and a permeate side from which the water is removed. The permeate side of the chamber is maintained at a low partial pressure of water through presence of vacuum, or by use of a sweep gas.

Abstract: A combination filter/dehydrator is disclosed which first filters a stream of oil or fluid of low volatility to remove particulate contaminants, and then passes the stream through a dehydrator 38 to remove free, emulsified, or dissolved entrained water. A pressure control valve 46 is provided to enable a portion of the oil stream to bypass the dehydrator in order to maintain a predetermined pressure differential across the dehydrator membrane. A discharge chamber (FIG. 5) is provided at an outlet of the dehydrator to prevent the loss of oil that has permeated the dehydrator membrane. A sweep gas stream 70 for removing water from the permeate side of the dehydrator membrane can include a coalescer 72 (FIG. 4) for removing liquids entrained in the sweep gas before entering device.

Abstract: A method and apparatus for the removal of free, emulsified, or dissolved water from liquids of low volatility, such as oil, is shown. The liquid of low volatility is removed by contacting the fluid stream of concern with one side of a semi-permeable membrane. The membrane divides a separation chamber into a feed side into which the stream of fluid is fed, and a permeate side from which the water is removed. The permeate side of the chamber is maintained at a low partial pressure of water through presence of vacuum, or by use of a sweep gas.

Abstract: A membrane air drier utilizes an orifice to serve as the sweep air inlet with a sweep diffuser placed a short distance from the orifice. Preferably, an open channel extends from the product end of the membrane module on the shell side of the fibers with a porous diffuser at one end of the open channel and an orifice at the other end of the channel.

Abstract: A combination filter/dehydrator is disclosed which first filters a stream of oil or liquid of low volatility to remove particulate contaminants, and then passes the stream through a dehydrator to remove free, emulsified, or dissolved entrained water. A pressure control valve is provided to enable the partial or complete bypass of oil around the dehydrator. A discharge chamber is provided at the outlet of the filter/dehydrator to prevent loss of oil through the dehydrator.

Abstract: An improved filter drier for a refrigeration system having a replaceable tubular filter element is shown. A desiccant assembly is removably secured within a housing. The assembly includes a first and second molded desiccant, a hollow tubular perforated core located within said first and second molded desiccant, and a tubular filter located over said core.

Abstract: A filter is disclosed having a layer of electret filter media or triboelectric filter media immediately adjacent or in intimate contact with one, or both sides, of a layer of hydrophobic media. Such filter is placed in communication with the upstream and/or downstream side of a mechanical electronic or electrostatic filter to solve problems present in the prior art. Additionally, a medical ventilator filter and system using such a filter is disclosed.

Abstract: An improved conical coreless filter element is shown which has an open upper end cap and a lower closed end cap. The conical coreless filter element fits inside a support cage or basket of complimentary conical shape which has a diameter the same size as or slightly larger than the diameter of the conical coreless filter element at any given point. The upper end cap contains sealing means such that it will seal to the filter cage and the filter cage itself has an annular housing adapter or member which seals to a tube sheet or a filter housing. The filter media may be pleated and may be made of a wide variety of materials which may be compactable and/or incinerateable. Likewise the end caps may also be made of a wide verity of materials to provide chemical compatability with the fluids being filtered.

Abstract: A porous coalescing filter element of conical configuration is disposed within a substantially cylindrical filter housing such that the area between the element and the wall increases in the direction of the primary phase flow to keep the annular velocity substantially constant or decreasing in the direction of primary fluid flow. The element may be manufactured with a round end and tapered walls terminating to a pointed apex, but is more preferably manufactured and secured within the filter housing using flat end caps on both ends. The filter element may be vacuum formed, or manufactured from media in a flat sheet form, which may be pleated if desired.

Abstract: A disposable box filter having a housing having mating channel-shaped male and female portions defining a generally box-shaped fluid chamber, with a pair of fluid ports, and a filter element in corrugated sheet form extending across the fluid chamber. The corrugated filter has generally vertically extending pleats or extremities which are mechanically sealed at each end between a pair of vertical axially extending portions of the filter housing.

Abstract: A disposable box filter having a housing comprising mating channel-shaped male and female portions defining a generally box-shaped fluid chamber, with a pair of fluid ports, and a filter element in corrugated sheet form extending across the fluid chamber. The corrugated filter has generally vertically extending pleats or extremities which are mechanically sealed at each end between a pair of vertical axially extending portions of the filter housing.

Abstract: A porous coalescing filter element of conical configuration is diposed within a substantially cylindrical filter housing such tha the area between the element and the wall increases in the direction of the primary phase flow to keep the annular velocity substantially constant or decreasing in the direction of primary fluid flow. The element may be manufactured with a round end and tapered walls terminating to a pointed apex, but is more preferably manufactured and secured within the filter housing using flat end caps on both ends. The filter element may be vacuumed formed, or manufactured from media in a flat sheet form, which may be pleated if desired.

Abstract: A filter assembly or bottle filter for use in bottles or reservoirs of varying shapes and sizes is provided. The assembly has a cap or closure member sealingly connected to a filter body or support having a pair of fluid passageways. A pair of fluid passageways in the cap or closure member are in fluid communication with the pair of passageways in the filter body. A filter of a size to pass through the opening of a reservoir is connected to the opposite end of one of the axially extending passageways in the filter body or support. One of the fluid passageways is used to draw the fluid being filtered through the filter, through one of the passageways in the filter support or filter body and out one of the passageways in the cap or closure member. A pressure monitoring device is connected to the other fluid passageway to monitor the level of the fluid in the reservoir.

Abstract: A disposable box filter having a housing comprising mating channel-shaped male and female portions defining a generally box-shaped fluid chamber, with a pair of fluid ports, and a filter element in corrugated sheet form extending across the fluid chamber. The corrugated filter has generally vertically extending pleats or extremities which are mechanically sealed at each end between a pair of vertical axially extending portions of the filter housing.

Abstract: A two-stage filtering process and a two-stage filter, with a first-stage coalescing filter separating and removing liquid paint droplets and solids from the gaseous contents of a spent aerosol container, and a second-stage filter removing the hazardous solvents from the gaseous mixture discharging from the first-stage filter.

Abstract: A compactable or incinerateable non-resilient, coreless, cylindrical filter element including an annular pleated filter media having rigid end caps which are sealingly bonded to the pleated filter media with the exterior of the filter element surrounded by, but not part of the filter element, a non-bypassing support cage comprising of perforated sheet formed into a cylinder and having an end cap at each end with the top flanged end of the support cage and the top end cap of the cylindrical filter element sealed between a support housing by sealing rings to thereby prevent leakage of fluid past the end of the filter media.