Certain embodiments include a screen assembly of a vessel, where the screen assembly includes a plurality of fixed elements and a retainer, and the retainer includes a ring, a plurality of wedges disposed about the ring, and a plurality of keyholes at spaced locations about the ring.

Each keyhole includes a bore and a slot extending from the bore into an adjacent wedge of the plurality of wedges, the slots have a width less than the bores, and the retainer may receive the fixed elements through the bores and may be rotated in a relation with the plurality of fixed elements to bring the plurality of fixed elements into simultaneous engagement with the wedges.

Devices and methods associated with these devices for significantly improving the efficiency of an existing or new treatment unit having a granular media filter bed supported above an underdrain for removing impurities passing through the filter bed. The devices and methods are specifically designed to prevent clogging of the underdrain to improve the operation and efficiency of the treatment unit. The devices and methods are directed to providing trapping structures and methods that allow a washing fluid to pass through the trapping structures but traps impurities in the washing fluid that have the potential of partially or completely clogging the underdrain. Further, one or more sensors are provided to determine if the trapping structure is performing properly.

A water purification kit/system comprises a first pot, a second pot, a filter, and a condensation collector. The first pot and the second pot are configurable into first and second configurations, wherein, in the first and second configurations, the first pot is either an upper pot or a lower pot, and the second pot is the other of the upper pot and the lower pot. In the first configuration, the upper pot and the lower pot form a water filtration system. In the second configuration, the upper pot and the lower pot form a water distillation system.

A water purification kit/system comprises a first pot, a second pot, a filter, and a condensation collector. The first pot and the second pot are configurable into first and second configurations, wherein, in the first and second configurations, the first pot is either an upper pot or a lower pot, and the second pot is the other of the upper pot and the lower pot. In the first configuration, the upper pot and the lower pot form a water filtration system. In the second configuration, the upper pot and the lower pot form a water distillation system.

A system for treating water includes at least one pump, at least one filter pot coupled to the at least one pump and configured to pass the flow of water to be treated in a first direction, at least one valve upstream of the filter pot, and, a processor operably coupled to the at least one pump and the at least one valve. The processor is configured to implement computer executable instructions that cause the processor to perform functions that include receiving a signal reflective of the parameter from at least one sensor, generating a cleaning signal as a function of the parameter, transmitting the cleaning signal to the at least one valve to close the valve to the source of water to be cleaned, and operating a cleaning cycle in which a cleaning water is flushed through the filter pot in a second direction opposite the first direction.

A method and a system for purification of contaminated oil, said method comprising at least two phases: a filter preparation phase which comprises the steps of: ? providing a depth filter by building at least a part of the depth filter from a filter material; and ? impregnating at least a part of said depth filter with a separation aid, and an oil filtering phase comprising the step of filtering contaminated oil through said depth filter which has been prepared during the filter preparation phase.

A method and a system for purification of contaminated oil, said method comprising at least two phases: a filter preparation phase which comprises the steps of: ? providing a depth filter by building at least a part of the depth filter from a filter material; and ? impregnating at least a part of said depth filter with a separation aid, and an oil filtering phase comprising the step of filtering contaminated oil through said depth filter which has been prepared during the filter preparation phase.

A coiled filter for use in a hydraulic braking system of a vehicle comprises a coiled mesh-like structure which is configured to be installed around a first surface of a cylindrical hydraulic component. The coiled filter is configured to have an internal spring force as a retention force which couples the filter to the first surface of the cylindrical hydraulic component. The filter may be pre-coiled prior to installation by plastically deforming to a diameter that is smaller than the diameter of the cylindrical hydraulic component on which the filter is installed.

A coiled filter for use in a hydraulic braking system of a vehicle comprises a coiled mesh-like structure which is configured to be installed around a first surface of a cylindrical hydraulic component. The coiled filter is configured to have an internal spring force as a retention force which couples the filter to the first surface of the cylindrical hydraulic component. The filter may be pre-coiled prior to installation by plastically deforming to a diameter that is smaller than the diameter of the cylindrical hydraulic component on which the filter is installed.

A system includes a sand filter disposed within a tank. A pipe connected to the tank is configured to flow fluid in or out of the tank. The system includes a valve configured to selectively allow fluid to flow through the pipe and a flowmeter configured to measure a flow rate of fluid through the pipe. An automatic control unit includes one or more processors and a non-transitory computer readable medium storing instructions executable by the one or more processors to perform operations including determining a debris accumulation status for the sand filter based in part on flow measurements from the flowmeter, and determining a failure status of the valve based in part on flow measurements from the flowmeter.