A gas filtering device includes an element and a case. The element includes a filter that filters a gas and a frame that holds a periphery of the filter. The case accommodates the element. The case includes a first member and a second member that are coupled to each other with the element interposed therebetween. The first member includes a frame holder that holds a periphery of the frame when the first member is coupled to the second member, and a temporary holder that performs temporary holding of the frame so that a part of the frame is separated from the frame holder and the frame is curved when the first member is not coupled to the second member. The second member includes a temporary-holding canceller that cancels the temporary holding of the frame by the temporary holder when the second member is being coupled to the first member.

A method for filtering a gas includes passing a gas into a compartment of a casing that includes a polymeric film, the casing having: a first sleeve having a first outlet opening, a first filter being at least partially disposed within the first sleeve so that gas passing through the first sleeve must pass through the first filter; and a second sleeve having an second outlet opening, a second filter being at least partially disposed within the second sleeve so that gas passing through the second sleeve must pass through the second filter, the second sleeve being closed so that the gas passing into the compartment of the casing passes through the first sleeve and the first filter and directly contacts at least a portion of the first sleeve comprised of the polymeric film but does not pass through the second sleeve. Opening the second sleeve when a predetermined condition is met so that the gas passes through the second sleeve and the second filter.

A filtration system is used with a pipe repair system, such as a cured-in-place pipe lining system. Before, during, and/or after the repair of the pipe with the pipe lining system, air from inside the pipe is directed into a filtration system. The filtration system removes contaminants, such as VOCs and other harmful gases, particles, and the like, with a filter, and then the filtered air is exhausted from the system. The filter can be a carbon filter or other filter that can remove harmful or hazardous materials and particles from the air prior to exhaust. The air is also sensed to acquire information, such as temperature, pressure, composition, flow, or the like.

A fluid filter has a filter housing with inlet opening for fluid to be cleaned and outlet opening for cleaned fluid. A filter element arranged in an element receptacle of the filter housing separates inlet opening from outlet opening. The filter housing has a housing body with an installation opening to the element receptacle, through which the filter element in an installation direction is introduced into the element receptacle. The filter housing has a housing cover for closing the installation opening. The installation opening is arranged in a transverse side of the housing body that is lateral relative to the housing axis. The filter housing has a sealing surface, surrounding the housing axis at least partially circumferentially, for contacting a seal of the filter element. The filter element has a seal support device for the seal and the filter housing has a pressing device for the seal support device.

A rigid, channel-framed, pleated air filter, with a plurality of linear bridging filaments on at least an upstream face of the pleated air filter media of the filter.

A filtering device for an evacuation station includes a filter bag configured to collect debris evacuated from a cleaning robot by an evacuation station. The filtering device includes an interface assembly configured to interface with the evacuation station. The interface assembly includes (i) a base attached to the filter bag along an opening of the filter bag, (ii) an access door configured to provide or limit access to a space within the filter bag depending on whether the access door is in an open position or a closed position, and (iii) one or more hinges connecting the base to the access door. The access door is rotatable around the one or more hinges from the closed position to the open position.

A dust filter is configured to filter air drawn into a vehicle canister. The dust filter includes a first portion including a first engaging portion and a second portion including a second engaging portion. The second portion is attached to the first portion by engagement of the second engaging portion with the first engaging portion. The first portion includes a filtration member and a case. The case includes an inner chamber within which the filtration member is disposed. The case includes a drainage port configured to drain liquid that has infiltrated the inner chamber. The second portion is attached to the first portion to form a cover that covers the drainage port together with the first portion. The cover has an outlet that opens to the outside at a position lower than the drainage port.

The invention relates to a separation unit for separating off liquid components from a gas stream comprising liquid components, the separation unit (1) comprising a metallic tube (3) and a baffler (19), the metallic tube (3) having a first end (5) and a second end (7) and being closed at the first and second ends (5, 7), the baffler (19) being placed inside the metallic tube (3), the metallic tube (3) having a side feed (35) at the first end (5) and a gas outlet (13) at the second end (7). The invention further relates to the use of the separation unit and a process for determining the amount of liquid components in a two phase stream comprising a gaseous phase and liquid components.

A filter element has a fold pack with a filter material folded in a zigzag shape. The fold pack has lateral fold profiles and an end fold section disposed at a head side of the fold pack. Lateral strips are attached to the lateral fold profiles of the fold pack. A seal section angularly projects at an angle away from the end fold section at the head side of the fold pack. The seal section is provided with at least one incision or cutout configured to receive a corresponding filter housing contour. A filter assembly with such a filter element is provided. The filter housing has a housing part with a filter housing contour provided with at least one engagement element. The at least one incision or cutout of the seal section receives the at least one engagement element of the filter housing contour.

A filter system and clamp system for a gas turbine air inlet uses a single clamp system that allows for securing in place both a first element and a second element on the grid of the gas turbine air inlet. The clamp system can be released to allow for services of the first filter element, while the second filter element remains in sealing engagement with the grid.