A filter cartridge can be used in a filter assembly for a system in an in tank filter for a hydraulic return filter. The filter assembly includes a safety construction to ensure that a cover is not place over the bowl of the filter assembly, without a filter cartridge mounted therein. The safety construction includes a lock arrangement on the cover member arrangement, cooperating with a flange on the tank. Methods of servicing use steps to lock and unlock the lock arrangement.

A filter device has a filter housing and a filter element arranged in the filter housing. The filter element at least partially encloses an inwardly positioned flow chamber. A purified medium can be discharged from the filter device through a flow socket provided with a wall that has an opening. A fastening flange is arranged at the wall of the flow socket adjacent to the opening, wherein a purging gas pipe of a purging device can be detachably fastened by the fastening flange to the flow socket. The opening in the wall of the flow socket receives the purging gas pipe.

An apparatus for dewatering sludge comprises a tank having an internal space divided by a dividing wall into an intake chamber and an extract chamber, an intake pipe connected to the intake chamber by an intake valve, a discharge pipe connected to the extract chamber by a discharge valve, and a transfer pipe providing fluid communication between the intake chamber and the extract chamber. The transfer pipe has first opening near the bottom of the intake chamber, and a second opening near the top of the extract chamber. A pump selectively creates positive and negative pressure within the intake chamber. A screen is positioned within the extract chamber between the second opening of the transfer pipe and the discharge pipe. 15

A vacuum filter apparatus is used to induce the influx of polluted air through a replaceable motor driven filter to remove airborne particulate pollutants. The apparatus comprises a frame with an inlet and outlet. The filter is covering the inlet while a vacuum generator is mounted on a hinged lid that covers the outlet. The filter is stretched over a drive roller and wrapped around a passive roller. The driver roller is connected to a motor through a gear box. The vacuum generator includes at least one blower that induces negative pressure inside the frame. A controller is used to control the normal operation of apparatus and alarms a user with the need of filter replacement. A lift assembly provides attachment of the apparatus to any extraneous carrier, thus, achieving substantial cleaning of polluted air right at fire/demolition sources when deployed in air by drones, lifts, etc.

An integrated composite filter and a water purification system having the same are provided. The integrated composite filter includes: a shell defining a chamber therein, and defining a raw water inlet, a pretreated water outlet, a pretreated water inlet, a pure water outlet and a waste water outlet which are in communication with the chamber respectively; a pretreating filtering element disposed within the chamber; a filtering membrane disposed within the chamber. The pretreating filtering element and the filtering membrane are sequentially positioned between the raw water inlet and the pure water outlet as well as the waste water outlet, and the pretreating filtering element is positioned between the raw water inlet and the pretreated water outlet, and the filtering membrane is positioned between the pretreated water inlet and the pure water outlet as well as the waste water outlet.

A machine for processing liquid or semi-liquid food products, includes: a frame including a front wall and a lateral wall; at least one container for containing the product to be processed; a stirrer mounted inside the container; a thermal treatment system, operatively connected to the container to heat the walls thereof; a dispenser connected to the container to allow extracting the product to be processed, the dispenser being mounted on the front wall of the frame. A supporting rod, having a longitudinal axis, is coupled to the lateral wall and movable in rotation about an axis perpendicular to the lateral wall, between a rest position and an operatively active position. A shelf is rotatably coupled to the supporting rod. The supporting rod supports the shelf. The shelf is movable in rotation about the longitudinal axis between an inoperative position and an operative position.