Abstract:
A filter assembly (15) for filtering e.g. stormwater includes flow regulating, siphon inducing, and surface cleaning features that allow the filter assembly to operate at the design filtration rate for an extended period of time. During filtration, water flows inwardly through an annular filter medium (31) into a drainage manifold (19). The rate of flow into the drain manifold is controlled by a float valve assembly (33). A check valve (34) permits air to escape, but not to enter. The filter assembly creates a siphon effect when the rate of flow into the drain manifold is increased. The siphon effect draws water through the entire filtration surface and the entire volume of the filter medium. When the external water level decreases to the level of an array of voids (21) in a hood (20) of the filter assembly, the siphon is interrupted by entering air streams that agitate the filter surface and dislodging particulate matter.
Abstract:
A method for filtering the water of an aquarium (11), a water cultivation tank or similar water bonds, by means of a filtering system comprising a closed vessel (13) and defining a chamber (15), a filtering body (12) housed in the chamber (15), a circulation pump (22) having a suction duct (24), communicating with the aquarium (11) by interposition of a siphon (27) and a delivery duct (26) communicating with the aquarium (11). Vent means are also provided to eject the air from the chamber (15). The method comprises the steps of: filling the filtering body (12) with a predetermined amount of water; starting the pump (22); short-circuiting the pump (22) by means of a fluid passage (43) by putting the delivery duct (26) in communication with the closed vessel (13); keeping the pump (22) short-circuited at least up to determine the siphon (27) trigger; subsequently stopping the pump (22); keeping the pump (22) stopped to allow the air to escape from the chamber (15) and the filtering body (12) to be filled with water; re-starting the pump (22).
Abstract:
PCT No. PCT/AU97/00710 Sec. 371 Date Apr. 22, 1999 Sec. 102(e) Date Apr. 22, 1999 PCT Filed Oct. 23, 1997 PCT Pub. No. WO98/17875 PCT Pub. Date Apr. 30, 1998A water filter arrangement (10) for trapping gross pollutants flowing in a storm water system is provided in-line or at end-of-line of a storm water pipe. The arrangement comprises an inlet (14) and an inlet area (18) which directs incoming water (16) into a filter (20). The filter traps entrained gross pollutants and filtered water exits the filter via filter outlet (50). The outlet (50) and surrounding walls (58 and 57) are shaped to create a flow of filtered water which forms a water barrier which restrains the flow of water and gross pollutants from the inlet (14) to the outlet (52). The water barrier is located between the inlet (14) and the outlet (52) preferably closer to the outlet than the inlet. As the filter (20) becomes full and the flow of filtered water exiting the filter decreases the water barrier subsides. When the filter is completely blocked, the water barrier completely subsides and the incoming water and gross pollutants by-pass the filter (20) and flow unrestrained without head loss from the inlet (14) to the outlet (52).
Abstract:
A method for filtering the water of an aquarium (11), a water cultivation tank or similar water bonds, by means of a filtering system comprising a closed vessel (13) and defining a chamber (15), a filtering body (12) housed in the chamber (15), a circulation pump (22) having a suction duct (24), communicating with the aquarium (11) by interposition of a siphon (27) and a delivery duct (26) communicating with the aquarium (11). Vent means are also provided to eject the air from the chamber (15). The method comprises the steps of: filling the filtering body (12) with a predetermined amount of water; starting the pump (22); short-circuiting the pump (22) by means of a fluid passage (43) by putting the delivery duct (26) in communication with the closed vessel (13); keeping the pump (22) short-circuited at least up to determine the siphon (27) trigger; subsequently stopping the pump (22); keeping the pump (22) stopped to allow the air to escape from the chamber (15) and the filtering body (12) to be filled with water; re-starting the pump (22).
Abstract:
PCT No. PCT/AU97/00710 Sec. 371 Date Apr. 22, 1999 Sec. 102(e) Date Apr. 22, 1999 PCT Filed Oct. 23, 1997 PCT Pub. No. WO98/17875 PCT Pub. Date Apr. 30, 1998A water filter arrangement (10) for trapping gross pollutants flowing in a storm water system is provided in-line or at end-of-line of a storm water pipe. The arrangement comprises an inlet (14) and an inlet area (18) which directs incoming water (16) into a filter (20). The filter traps entrained gross pollutants and filtered water exits the filter via filter outlet (50). The outlet (50) and surrounding walls (58 and 57) are shaped to create a flow of filtered water which forms a water barrier which restrains the flow of water and gross pollutants from the inlet (14) to the outlet (52). The water barrier is located between the inlet (14) and the outlet (52) preferably closer to the outlet than the inlet. As the filter (20) becomes full and the flow of filtered water exiting the filter decreases the water barrier subsides. When the filter is completely blocked, the water barrier completely subsides and the incoming water and gross pollutants by-pass the filter (20) and flow unrestrained without head loss from the inlet (14) to the outlet (52).