Abstract: A method of and apparatus for extending the life of fountain solutions used in commercial printing presses comprises withdrawing fountain solution from the dampener recirculation system of a printing press and directing the withdrawn fountain solution through a sediment prefilter, a separation filter, and a post treatment filter. The sediment prefilter preferably comprises a melt blown polypropylene filter; the separation filter preferably comprises a diatomaceous earth filter; and the post treatment filter preferably comprises a zeolite filter.

Abstract: A method of and apparatus for extending the life of fountain solutions used in commercial printing presses comprises withdrawing fountain solution from the dampener recirculation system of a printing press and directing the withdrawn fountain solution through a sediment prefilter, a separation filter, and a post treatment filter. The sediment prefilter preferably comprises a melt blown polypropylene filter; the separation filter preferably comprises a diatomaceous earth filter; and the post treatment filter preferably comprises a zeolite filter.

Abstract: Using the filter auxiliary agent separated by backwashing from a filter element repeatedly and effectively, the consumption amount of a filter auxiliary agent and the generation of industrial waste can be suppressed. In a filter auxiliary agent pre-coat circuit, a filter auxiliary agent in a pre-coat tank is attached and stacked on a filter element in a filter case, and a filter auxiliary agent layer is formed. In a filter circuit, the filter auxiliary agent layer of the filter element removes sludge in the filter treatment liquid in a main tank. A backwashing circuit breaks down the filter auxiliary agent layer and a sludge layer, separates the filter auxiliary agent layer and the sludge layer by backwashing from the filter element, and circulates to the pre-coat tank. After repeating these steps a plurality of times, the filter auxiliary agent and sludge separated by backwashing are taken out to the exterior.

Abstract: A filter assembly for ultra-filtration of fluids such as waste water comprises a porous tube which is incrementally advanced into the fluid so as to expose a fresh portion periodically and maintain a flow rate over a period of time.

Abstract: A contaminant-flushing machine for removing contaminants from a container, such as an engine transmission, air-conditioner coil, or transmission cooler, which includes hoses for coupling to the transmission cooler and a pump for circulating fluid through the hoses and the transmission cooler, and a fluid filter having a reduced tendency towards causing vaporization of the fluid. Also included in the contaminant-flushing machine is an automatic aeration system for injecting air into the circulating fluid at predetermined intervals. Additionally, a reverse flow piping circuit is included to permit automatic and electric manipulation of the flow direction of fluid through said transmission cooler while at the same time not altering the direction of flow of fluid through the pump. The flow reversals are repeated with a cycle of three (3) seconds in one direction followed by a flow in the other direction of one-fourth (¼) of a second, thereby creating an overall flow of fluid primarily in one reverse direction.

Abstract: A device for filtration of gas-oil intended to supply a diesel engine comprises an electric heating unit which includes a casing internally defining a chamber for heating the gas-oil to be filtered, a filtration unit which includes a casing internally defining a chamber for filtration of the heated gas-oil, means for connecting the heating and filtration chambers and means for assembly of the casings of the heating and filtration units. The connection means include means for directly and tightly connecting the chambers of the said units. The assembly means include means for detachable fixing of the casing of one of the heating and filtration units to the casing of the other of the said units, and means for retention in translation of one of the units relative to the other.

Abstract: A system for use in filtering a slurry using air pressure to squeeze the slurry material and dewatering it. The system including a source of slurry, a chamber, a filter belt that passes through the chamber, a manifold inlet supplying the slurry to a first side of the filter belt to form a uniform moist cake of the filter material, an inlet seal and an outlet seal to seal a belt inlet and a belt outlet formed on the chamber, and a source of the pressurized air selectively applicable to the chamber to dry the moist cake of filtered material.

Abstract: A system suitable for the elimination of Cryptosporidium oocysts from water includes a filter bed comprising four layers of inert particulate material such that, from the top layer (first layer) to the bottom layer (fourth layer), the coarseness of the particles decreases while the density of the particulate material increases.

Abstract: A strainer includes a water collector on an upper side, and a tube coupled on the bottom of the water collector. The tube has flutes formed on the inner wall. An extendable rod is housed in the tube and has lugs on the periphery to slide in the flutes. A latch member is housed in a housing chamber on the bottom of the extendable rod and has coupling sections formed on the bottom in an annular manner. An elastic element has a top end housed in the latch member and a bottom end fastened to a coupling member to couple on the bottom end of the tube. The top end of the extendable rod is fastened to a plug which is insertable in the drain port of the water collector. A filter is located in the water collector and has a button in the center depressible up and down to control water collection or discharge.

Abstract: A pressure-filter apparatus includes at least one filtration chamber coupled with a source of slurry. The filtration chamber is also coupled with a source of fluid at an elevated pressure, which may be arranged in series or in parallel with a source of wash fluid. The pressure-filter apparatus may also include a source of fluid at a conventional pressure. The source of fluid at elevated pressure has a limited volume for initially treating the slurry within the chamber. The source of fluid at conventional pressure has a substantially unlimited volume for completing the treating of slurry within the chamber. The relative volume capacity of the two fluid sources provides an improved efficiency in the treatment of the slurry and the overall efficiency of the apparatus by limiting the time and capacity of accumulation of elevated pressure fluid while using the conventional pressure for extended treatment of the slurry within the chamber.

Abstract: The tray column (1) has downcomers (3) for transporting a liquid between adjacent trays (2). The liquid transport takes place in each downcomer through a plurality of discharge apertures (32) onto a loaded tray. Liquid flows out of the discharge apertures in the form of jets (60) that blend into a regionally divergent flow field (6) on striking the loaded tray. The flow field has transverse components of the flow speed with respect to a longitudinal main flow direction (61). Guide elements (4) are arranged beneath the discharge apertures and at a spacing from the loaded tray which each guide the impulse of liquid corresponding to the divergent flow field. The guide elements contribute to forming the transverse speed components such that the longitudinal component of the flow speed has a largely constant profile in each plane perpendicular to the main flow direction.