Abstract: An absorption filter for the purification of gas or air streams, especially gas or air streams which contain toxic or radioactive contaminants.

Abstract: A sealing member adapted to form a fluid seal about an opening in an air flow system and which may be removed from the system in the event of the contamination of the fluid. In a preferred embodiment, the sealing member comprises a retainer having a cross-sectional configuration which defines a pair of continuous, open, generally U-shaped channels, and with a fluid of relatively high consistency substantially filling each channel. The retainer is adapted to be releasably and sealably mounted to each of the housing and a member disposed across the opening in the housing, and including a flange extending into each channel and the fluid therein to effect a seal.

Abstract: An apparatus which uses suction to draw radioactive particles through a high efficiency filter and contains such filtered particles in a disposable bladder-filter unit for subsequent disposal. The bladder-filter unit prevents the escape of filtered radioactive particles to the ambient atmosphere during the operation of the apparatus and also during disposal, as well as preventing the radioactive contamination of the remainder of the apparatus.

Abstract: Filter charging apparatus for filter assembly for removal of radioactive contaminants in a fluid stream, the filter assembly including a housing with at least one filter bed therein and the filter charging apparatus for adding filter material to the filter assembly includes a tank with an opening therein, the tank opening being disposed in flow communication with opposed first and second conduit means, the first conduit means being in flow communication with the filter assembly housing and the second conduit means being in flow communication with a blower means. Upon activation of the blower means, the blower means pneumatically conveys the filter material from the tank to the filter housing.

Abstract: A filter unit adapted for receiving a flow of fluid potentially carrying particulate material and for holding filters transverse to the flow is disclosed, and in one preferred application of the invention the flow is an air stream containing radioactive particles. The filter unit has a generally cubic-shaped housing having a fluid inlet opening and a fluid outlet opening in two opposite surfaces and preferably these openings are provided with flanges. The housing is also provided in its lateral surfaces with a first opening and a second opening enabling insertion and removal of filters though these openings. The openings are preferably in the same lateral surface or wall. Each opening has a door means mounted to close the opening with each door means being capable of being opened at least 90.degree. to the lateral surface of the housing on which the door means is mounted.

Abstract: In a hermetically sealed hood provided with recycle and recovery apparatus a labelled compound is obtained by adsorbing and releasing a gaseous radioisotope under vacuum in a reaction system incorporated with vials containing adsorbents thereby to bring said gas into contact with a compound to be labelled and to recover the gas remaining in the system by adsorbents or reacting agents, and removing a vial of products and a recovery vial of unreacted gases by sealing under vacuum. The gaseous radiosotope used in said preparation of the labelled compound is itemized (i.e. separated and collected) by applying the principle of adsorption and release and the removal by seal under vacuum mentioned above to capillary apparatus connected with said gas vial and a plurality of recovery vials.