Methods and systems for recovering retained filtered fluid are provided.

Methods and systems for recovering retained filtered fluid are provided.

A filter cartridge includes a threaded sleeve having a seal holder recess and seal member. The filter cartridge is for removably threading onto a filter head that includes threads for connection to the filter cartridge by way of the threaded sleeve. The filter head includes a ramp that engages the seal member to form a seal. The force needed to make the seal is a torque of less than 10 N-m.

A filter cartridge includes a threaded sleeve having a seal holder recess and seal member. The filter cartridge is for removably threading onto a filter head that includes threads for connection to the filter cartridge by way of the threaded sleeve. The filter head includes a ramp that engages the seal member to form a seal. The force needed to make the seal is a torque of less than 10 N-m.

A system, method and apparatus for monitoring and providing maintenance updates for irrigation filters. According to a first preferred embodiment, the present invention includes one or more load cells at one or more of the mounting feet of an in-line filter to actively measure the increased weight of the filter during irrigation operations. According to a further preferred embodiment, the weight sensor of the present invention may transmit its data to a processing unit, where the weight is compared to one or more stored weight values. Preferably, when the detected weight exceeds a threshold level, the system may trigger notices and/or remedial actions.

A system, method and apparatus for monitoring and providing maintenance updates for irrigation filters. According to a first preferred embodiment, the present invention includes one or more load cells at one or more of the mounting feet of an in-line filter to actively measure the increased weight of the filter during irrigation operations. According to a further preferred embodiment, the weight sensor of the present invention may transmit its data to a processing unit, where the weight is compared to one or more stored weight values. Preferably, when the detected weight exceeds a threshold level, the system may trigger notices and/or remedial actions.

A liquid filter device may include a filter housing and a ring filter element arranged in the filter housing. The filter housing may include a filter housing cover and a filter housing pot connectable tightly therewith via a housing seal. A discharge channel, a central clean channel, and a vent channel may be disposed in the filter housing pot. The ring filter element may include an upper end plate, a lower end plate, and a pleated star. When the liquid filter device is in an operating state, a pin arranged on the lower end plate may be disposed in and seal the discharge channel via a first seal, a second seal arranged on the lower end plate may be disposed against a surface of the clean channel, and a third seal arranged on the upper end plate may be disposed against a surface of the vent channel.

A liquid filter device may include a filter housing and a ring filter element arranged in the filter housing. The filter housing may include a filter housing cover and a filter housing pot connectable tightly therewith via a housing seal. A discharge channel, a central clean channel, and a vent channel may be disposed in the filter housing pot. The ring filter element may include an upper end plate, a lower end plate, and a pleated star. When the liquid filter device is in an operating state, a pin arranged on the lower end plate may be disposed in and seal the discharge channel via a first seal, a second seal arranged on the lower end plate may be disposed against a surface of the clean channel, and a third seal arranged on the upper end plate may be disposed against a surface of the vent channel.

A filter system is provided with a housing provided with a cover. The housing has a raw liquid inlet, a clean liquid outlet, and a liquid drain. A filter element is provided that separates a raw side from a clean side. A slide valve with a valve rod and a sealing head is provided, wherein the sealing head is arranged such that the liquid drain of the housing is closable but openable. A coupling is arranged between the sealing head and the valve rod, providing an axial securing action of the valve rod at the sealing head and a radial securing action, separate from the axial securing action, of the valve rod at the sealing head. A slide valve for such a filter system as well as a sealing head and a valve rod for such a slide valve are provided.

A removable filter cartridge includes a filter housing containing a filter for filtering liquid and a sealing valve assembly coupled to the filter housing and for removably coupling the filter cartridge to a filter head. The sealing valve assembly include an inlet passageway and an outlet passageway. The sealing valve also including an inlet sealing valve that blocks the inlet passageway and an outlet sealing valve that blocks the outlet passageway while the filter cartridge is uncoupled from the filter head. A method of retrofitting a filter housing includes removing the filter housing from a filter head, coupling a sealing valve assembly to the removable filter to form a removable filter cartridge, and coupling the removable filter cartridge to the filter head.