A no filter, no run filtration system that is designed to verify that a filter cartridge is present to safe-guard against damage to fuel injectors, associated fuel components, etc. and engine malfunctions. Fuel flow to the engine is prevented altogether or permitted in an amount insufficient to allow engine operation if a filter cartridge is not installed, and an appropriately designed filter cartridge is required to be used in order to permit sufficient fuel flow for engine operation. In one embodiment, a flow restriction valve is provided that includes a ball.

A method for clearing a wetted hydrophobic filter includes a first step in which the air permeability of the hydrophobic filter is monitored, and a second step in which the hydrophobic filter is cleared by means of a connected air pump, if it is detected that the hydrophobic filter is clogged. An apparatus for performing this method includes a pressure sensor and an air pump connected to an air separation chamber via a conduit, and a control and monitoring unit configured to actuate the air pump in order to clear the hydrophobic filter.

A water filter cartridge has an end cap with inlet and outlet nozzles extending from the end cap. A lateral support extends laterally from at least one of the nozzles. A projection extends from the lateral support toward a receiving manifold to cooperate with the manifold during use. The lateral support is offset from the end cap so the projection is vertically offset from an end of the cartridge and laterally offset from and supported from the nozzles.

A water filter cartridge has an end cap with inlet and outlet nozzles extending from the end cap. A lateral support extends laterally from at least one of the nozzles. A projection extends from the lateral support toward a receiving manifold to cooperate with the manifold during use. The lateral support is offset from the end cap so the projection is vertically offset from an end of the cartridge and laterally offset from and supported from the nozzles.

A retrofit no filter no run insert for existing filtration systems manufactured without a no filter no run engine integrity protection feature. The insert is beneficial for a manufacturer that initially does not require the benefit of a no filter no run engine integrity protection feature but later requires such a feature. The insert can be installed into the existing filtration system without any modification to the existing filtration system head. The no filter no run insert prevents the equipment supplied by the filtration system (e.g., an internal combustion engine) from being operated without a filter element. Further, the no filter no run insert prevents the equipment supplied by the filtration system from being operated with an unauthorized or non-genuine replacement filter element. The no filter no run insert safeguards against damage to downstream components of the filtration system and malfunctions of equipment in which the filtration system is used.

A retrofit no filter no run insert for existing filtration systems manufactured without a no filter no run engine integrity protection feature. The insert is beneficial for a manufacturer that initially does not require the benefit of a no filter no run engine integrity protection feature but later requires such a feature. The insert can be installed into the existing filtration system without any modification to the existing filtration system head. The no filter no run insert prevents the equipment supplied by the filtration system (e.g., an internal combustion engine) from being operated without a filter element. Further, the no filter no run insert prevents the equipment supplied by the filtration system from being operated with an unauthorized or non-genuine replacement filter element. The no filter no run insert safeguards against damage to downstream components of the filtration system and malfunctions of equipment in which the filtration system is used.

A water bag pressure detection device, a water bag inflow control device and a water bag type water purifier are provided. The water bag pressure detection device includes: a base seat defining an airtight cavity therein, and having an upper end provided with a mounting opening; a pressure sensor module having at least a lower portion disposed in the airtight cavity and connected with a circumferential edge of the mounting opening in a sealing manner, an inductive head of the pressure sensor module being configured to abut against a lower portion of the water bag; and a ventilation member defining a ventilation passage therein and disposed to the base seat, the ventilation passage being provided with a balancing seal member configured to move in the ventilation passage along with variations of pressure in the airtight cavity and outside pressure.

A water bag pressure detection device, a water bag inflow control device and a water bag type water purifier are provided. The water bag pressure detection device includes: a base seat defining an airtight cavity therein, and having an upper end provided with a mounting opening; a pressure sensor module having at least a lower portion disposed in the airtight cavity and connected with a circumferential edge of the mounting opening in a sealing manner, an inductive head of the pressure sensor module being configured to abut against a lower portion of the water bag; and a ventilation member defining a ventilation passage therein and disposed to the base seat, the ventilation passage being provided with a balancing seal member configured to move in the ventilation passage along with variations of pressure in the airtight cavity and outside pressure.

A fluid filtration system may include a fluid filter assembly that includes a filter element configured to filter a fluid and a sensor probe incorporated into the fluid filter assembly. The sensor probe may include a chemically reactive material sensitive to at least one property of the fluid and at least a portion of the sensor probe may be exposed to the fluid.

A fluid filtration system may include a fluid filter assembly that includes a filter element configured to filter a fluid and a sensor probe incorporated into the fluid filter assembly. The sensor probe may include a chemically reactive material sensitive to at least one property of the fluid and at least a portion of the sensor probe may be exposed to the fluid.