A filter device includes a case, an external filter disposed inside the case to filter substances introduced into the case and configured to be movable with respect to the case, and an internal filter disposed inside the external filter to filter the substances introduced into the case and configured to be movable with respect to the external filter.

A filter device includes a case, an external filter disposed inside the case to filter substances introduced into the case and configured to be movable with respect to the case, and an internal filter disposed inside the external filter to filter the substances introduced into the case and configured to be movable with respect to the external filter.

Examples are disclosed herein that relate to an in-pond water quality maintenance system. One example provides a pond water quality maintenance system, including a skimmer basin configured to collect pond surface debris, the skimmer basin including an upper opening configured to permit a flow of water and debris from a pond surface into the skimmer basin, a strainer basket positioned within the skimmer basin and configured to trap at least some of the debris that enters the skimmer basin through the upper opening, a skimmer pump positioned within the skimmer basin below the strainer basket, the skimmer pump configured to draw water through the strainer basket and to pump the water out of the skimmer basin, and one or more lower openings configured to permit a flow of water into the skimmer basin from a pond depth below the strainer basket.

Examples are disclosed herein that relate to an in-pond water quality maintenance system. One example provides a pond water quality maintenance system, including a skimmer basin configured to collect pond surface debris, the skimmer basin including an upper opening configured to permit a flow of water and debris from a pond surface into the skimmer basin, a strainer basket positioned within the skimmer basin and configured to trap at least some of the debris that enters the skimmer basin through the upper opening, a skimmer pump positioned within the skimmer basin below the strainer basket, the skimmer pump configured to draw water through the strainer basket and to pump the water out of the skimmer basin, and one or more lower openings configured to permit a flow of water into the skimmer basin from a pond depth below the strainer basket.

A filter device with a removable termination part (81; 82) and a housing (3) that receives a replaceable filter element (5) having two end caps (25,47). Between the end caps, a filter material (12) extends. A positioning device (65) is arranged between the termination part (81; 82) and one end cap (47). The positioning device positions the filter element (5) within the housing (3), at least when viewed in the circumferential direction of the filter element, in interaction with at least one corresponding positioning element (71) of the end cap (47).

A filter device with a removable termination part (81; 82) and a housing (3) that receives a replaceable filter element (5) having two end caps (25,47). Between the end caps, a filter material (12) extends. A positioning device (65) is arranged between the termination part (81; 82) and one end cap (47). The positioning device positions the filter element (5) within the housing (3), at least when viewed in the circumferential direction of the filter element, in interaction with at least one corresponding positioning element (71) of the end cap (47).

Screen designs and screens for a mechanical separation device are disclosed for separating solids from liquids in a process stream. A screen may have a plurality of openings, which are conical shaped, having a diameter of about 1.0 mm to about 1.4 mm in size that are formed on a stainless steel sheet.

Screen designs and screens for a mechanical separation device are disclosed for separating solids from liquids in a process stream. A screen may have a plurality of openings, which are conical shaped, having a diameter of about 1.0 mm to about 1.4 mm in size that are formed on a stainless steel sheet.

An apparatus for storing organic materials includes: a body having an opening for receiving the organic materials to be stored; an outlet formed in the body through which the organic materials are unloaded from the body; and a cooling fluid circuit for circulating cooling fluid through the organic material collected by the hopper.

A removable and replaceable end cap that selectively lockingly engages a seat ring of a filter housing. The end cap may include a flange that compresses a gasket member between the end cap and the seat ring to form a fluid tight seal therebetween. The end cap may include cam locking grooves that may each receive insertion of a protrusion of the seat ring, and which are structured for at least rotational displacement about the received protrusion as the end cap is rotated between locked and unlocked positions relative to the seat ring. The end cap may also include an opening that accommodates the passage of a fluid to a filter element. The filter element, which may be coupled to the end cap, may be adapted to remove particulate or contaminate from the received fluid.