According to one embodiment, a system and process for the equalization of pressures of a flow stream across one or more valves is provided. A process circuit having clean non-abrasive fluid and at least one slave cylinder fbr transmitting pressure to a process flow stream is employed.

According to one embodiment, there is provided a chemical liquid supply system including a chemical liquid supply apparatus and a monitoring apparatus. The chemical liquid supply apparatus includes a nozzle, a filter, a first pressure gauge, and a second pressure gauge. The first and the second pressure gauge are disposed on the pipeline, respectively at a chemical liquid supply-source side and chemical liquid delivery side of the filter. The monitoring apparatus is configured to determine a state of the filter based on first differential pressure time information in which a differential pressure is acquired in a period until a time point of a lapse of a predetermined time since a start of pneumatic feeding of the chemical liquid to the nozzle. The differential pressure is a difference between a first pressure value measured by the first pressure gauge and a second pressure value measured by the second pressure gauge.

An apparatus and method for filtering molten metal, such as aluminum or an aluminum alloy includes at least one ceramic foam filter or any other type of filtration media such as porous tube or alumina balls disposed in a receptacle for the molten metal. A vibrator vibrates at least one of the filter, the receptacle or the metal and may be used to induce priming, filtering and/or drainage of the filter. The vibrator may be retrofitted to an existing filter system and may be adjustable in frequency and amplitude. The vibration may be continuous over a given period or produced in a single shock.

A filter monitoring system and method are described. The filter monitoring system includes a remote telematics system, and a data link between the remote telematics system and an onboard telematics system. The remote telematics system is configured to receive, via the data link, an indication of a pressure drop across a filter cartridge of the filtration system from the onboard telematics system, determine a first value indicative of a remaining filter life of the filter cartridge of the filtration system, determine a second value indicative of a remaining filter life of the filter cartridge that is determined in a different manner than the first value, compare the first value to the second value to determine which value indicates a least amount of life remaining for the filter cartridge, and transmit an indication of the least amount of life remaining for the filter cartridge based on the comparison.

Disclosed is a filtering method for isolating a substance from a sample. The method includes: providing a filter module having a sample inlet, a sample outlet, and a filter covering the sample outlet; introducing, via a sample inlet a first quantity of the sample into the filter module; conducting the sample from the sample inlet through the filter and the sample outlet by applying a pressure difference between a side of the filter facing the sample inlet and a side of the filter facing away from the sample inlet; measuring the pressure difference and/or a volumetric flow through the filter; comparing the measurement values to a predefined reference value; and ending the method if successively detected measurement values lie within a predefined range of values around the reference value. Disclosed also is a device with which the method can be carried out.

A filter device includes a filter vessel with a fluid inlet for unfiltered liquid, a filter element in the filter vessel with a filter inlet communicating with the vessel and with a filter outlet, the filter outlet communicating via a cleaning duct and a cleaning valve with a cleaning device, the cleaning device including a cleaning chamber including a volume V0 of cleaning fluid and a pressure chamber at a starting pressure P0, communicating with the cleaning chamber for supplying cleaning fluid to the filter outlet, via the cleaning duct, a fluid supply line connected via a pump to the cleaning chamber for supplying a volume Vr of cleaning fluid to the cleaning chamber while the cleaning chamber is in open fluid connection with the pressure chamber and the cleaning valve is closed so that the pressure in the pressure chamber rises to at or about the starting pressure P0.

Disclosed are systems, methods, and algorithms for monitoring and indicating filter life. In particular, the disclosed systems, methods, and algorithms may be utilized for monitoring and indicating the useful life of a filter in an internal combustion engine.

According to one embodiment, a system and process for the equalization of pressures of a flow stream across one or more valves is provided. A process circuit having clean non-abrasive fluid and at least one slave cylinder for transmitting pressure to a process flow stream is employed.

Disclosed herein is a method, system, and apparatus, for filtering liquid, which uses negative air pressure to draw liquid stream through a filter screen and which cleans that filter screen by periodically modulating the negative air pressure to allow the liquid stream to wash any contaminants from the surface of the filter screen.

The use of electrical analyzers to monitor and control separation processes is described. The electrical analyzers monitor electromagnetic properties of materials being treated, and are used to adjust the separation process based on the changing electromagnetic properties. The electrical analyzers generally sample process fluid and apply a static or varying electric field to the process fluid while monitoring energy uptake of the process fluid from the electric field by measuring electrical parameters of the circuit. The changing electrical response of the process is related to changing process conditions and can be used to control the process.