An system includes a fabric filter, an air supply system, a pulsing valve that is coupled to the air supply system and is configured to generate a statistical pulse of air that is directed to the fabric filter, an air flow monitor that is configured to monitor a flow of air associated with the statistical pulse of air, and a valve controller that is coupled to the air flow monitor that is configured to generate a performance signature for the pulsing valve based on the flow of air that was monitored.

Devices to determine the filtration behavior of a device for filtering gaseous fluid. These devices are characterized by unchanged reproducibility during further tests. To this end, the device comprises a first device for setting a particular differential pressure, a second device having a certain degree of filtration efficiency of the gaseous fluid, which flows through the devices, of the filter test system such that a differential pressure and/or filtration efficiency are adjustable in a variable fashion and independently of one another,
and the first device (2) and the second device (3) are normal for filtration,
with permanently constant characteristics with regard to the differential pressure that is set and the filtration efficiency that is set as a reference device for simulation of a filtering separator, a first adapter for coupling on the inflow side, and a second adapter for coupling on the outflow side.

A vacuum cleaner that includes a suction source configured to generate a suction airflow, a dirt collector in fluid communication with the suction source and configured to separate debris from the suction airflow and the dirt collector is configured to store the debris separated from the suction airflow. The vacuum further includes an infrared sensor operable to output a signal corresponding to a distance to an amount of debris stored in the dirt collector, a controller that receives the signal, and the controller is operable to determine a fill level stored in the dirt collector based on the signal. A visual display displays the fill level stored in the dirt collector.

An air filter clog detector that provides a simpler and reliable method of determining clogging level of air filters using a grayscale or color light sensor. An example air filter clog detector includes a light source (e.g., light emitting diode (LED)), light detector, and circuitry (e.g., micro-processor controller). The light source is configured to emit light toward an air filter. The light detector is configured to measure a color of light reflected by the air filter. The circuitry is configured to determine whether the air filter is clogged based on the color of light reflected by the air filter. To prevent the air filter clog detector from becoming dirty, the detector can be positioned on the downstream side of the air filter.

Method of identifying a valid flow path includes: performing fluid analysis of a porous body, which is ought to have inflow surface and outflow surface, based on structure data representing a 3-dimentional structure of the porous body to generate data indicating at least a pressure distribution of a fluid in a flow path in the porous body; and identifying a valid flow path that allows the fluid to flow from the inflow surface to the outflow surface based on a gradient of pressure values along a flow direction of the fluid in the flow path.

A system and method are provided for verifying replacement of an air filter in a heating ventilation and air conditioning (HVAC) system in a building includes: accessing an HVAC system air filter replacement verification software application (HVAC Filter App) on a mobile device (MD); using a camera on the mobile device as prompted by the HVAC Filter App to take one or more photos of an old air filter as installed in the HVAC system (first set of photos); saving the first set of photos on the MD; using a camera on the mobile device as prompted by the HVAC Filter App to take one or more photos of a new air filter prior to being installed in the HVAC system (second set of photos); saving the second set of photos on the MD; using a camera on the mobile device as prompted by the HVAC Filter App to take one or more photos of the new air filter as installed in the HVAC system (third set of photos); saving the third set of photos on the MD; forwarding the first, second, and third set of photos using the HVAC Filter App; and performing a comparison of the first, second, and third set of photos to verify the new air filter has been installed in the HVAC system.

The invention refers to a plant for treating receptacles adapted to contain a pourable product comprising: at least a treatment unit apt to carry out a treatment process on the receptacles; an isolation chamber housing the treatment unit and containing, in use, a controlled atmosphere controlled in sterile and/or aseptic conditions; and a filtering unit configured to filter a gas to be introduced in the isolation chamber for constituting the controlled atmosphere; wherein the treatment plant further comprises a test device housed inside the isolation chamber, immersed, in use, in the controlled atmosphere and configured to perform one or more test operations on the filtering unit.

A method for evaluating an air purification system. The method includes generating, with an air flow generator, a flow of air through a test filter so that an upstream air flow exists an upstream side of the test filter and a downstream air flow exists on a downstream side of the test filter. A multiple contaminant mixture is injected, with a fluid injector, into the upstream air flow. Downstream concentrations for each contaminant of the multiple contaminant mixture in the downstream air flow are measured with a contaminant measurement device. Test filter breakthrough curves for each contaminant of the multiple contaminant mixture in the downstream air flow are generated based on the downstream concentrations for each contaminant of the multiple contaminant mixture.

An aerosol distributor for filter leakage detection in a gas filtration system, said aerosol distributor being configured to be positioned in a gas stream upstream of the filter, said aerosol distributor comprising: a rotatable distributor housing comprising a hub in fluid connection with two or more radial chambers evenly distributed around said hub, the distributor housing having an inlet for admitting a test aerosol from an aerosol source via the hub into the radial chambers, each radial chamber being elongated, sealed at a distal end, and provided with a plurality of outlet holes distributed along the length thereof for releasing the aerosol from the radial chamber into a gas stream surrounding the aerosol distributor, and wherein said aerosol distributor further comprises an actuator configured to rotate the distributor housing around a central axis thereof.

A honeycomb body having a porous ceramic honeycomb structure with a first end, a second end, and a plurality of walls having wall surfaces defining a plurality of inner channels. A highly porous layer is disposed on one or more of the wall surfaces of the honeycomb body. The highly porous layer has a porosity greater than 90%, and has an average thickness of greater than or equal to 0.5 m and less than or equal to 10 m. A method of making a honeycomb body includes depositing a layer precursor on a ceramic honeycomb body and binding the layer precursor to the ceramic honeycomb body to form the highly porous layer.