An air grid for supplying air under pressure. The air grid may be used as an air scour system for a filter for removing at least some impurities (e.g., foreign matter of any nature including a solid, a liquid or a gas) from water or wastewater or as an aerator for aerating wastewater in an aeration tank or basin. The air grid includes an adapter for permitting in field adjustment of one or more components (e.g., drop pipe) of the air grid. Preferably, the adapter houses a portion of an air supply header and a portion of a drop pipe such that the air supply header is disposed above the drop pipe. The adapter may include a detachable sealing assembly. A tool may be provided for inserting and/or removing one or more components of the air grid from the operation environment.

A coupling arrangement is provided for a screw coupling for liquid conduits of a high-pressure cleaning device. The coupling arrangement is connectable in a liquid-tight manner to a further coupling arrangement of the screw coupling, and includes a conduit piece having a channel for liquid under pressure, a multi-start thread for screwing the coupling arrangement to the further coupling arrangement, and a clamping device which is clampable to a clamping face of the further coupling arrangement. The clamping device includes a dimensionally stable clamping ring mount on which a clamping ring is held, wherein the clamping ring is deformable and adaptable to the shape of the clamping face by pressing onto the clamping face of the further clamping arrangement. In addition, a screw coupling with a coupling arrangement of that kind is provided.

In one embodiment, the invention is directed to a high-pressure bi-directional sealing system having circumferentially extending outer support rings (1520, 1900), annular, axial seals (1600, 1800) between the outer support rings (1520, 1900) and a circumferentially extending inner support ring (1700) located between the annular, axial seals (1600, 1800). The outer support rings (1520, 1900), seals (1600, 1800), and circumferentially extending inner support ring (1700) are located within a space between an outer tube (1502) and an inner tube (1504) that is telescopically disposed within the outer tube (1502). Seals (1600) and (1800) are oriented in opposite directions. Specifically, the opening of seal (1600) is facing in a first direction and the opening of seal (1800) is facing in a second direction that is opposite the first direction. This configuration enables the high-pressure bi-directional sealing system to handle pressure in both directions.

In accordance with at least one aspect of this disclosure, an adjustable vent tube joint for passing airflow therethough includes, a first segment, a flange extending radially from an outer diameter of the first segment, configured to mount to the vent tube joint to a structure, a second segment rotatably connected to the first segment, and a third segment rotatably connected to the second segment. In accordance with at least one aspect of this disclosure, an adjustable vent pipe can include, a first segment and a second segment concentric with the first segment, the second segment being slidable relative to the first segment. In accordance with at least one aspect of this disclosure, an insert for an exhaust termination can include, a frame configured to fit within an existing louvered exhaust termination, a hinge member, and a flap operatively connected to the frame via the hinge member configured to open with an exhaust flow to connect a dryer exhaust outlet to an ambient external environment through the exhaust termination.

A magnetic filter 10 includes first and second separation chambers 10, 12. The separation chambers 10, 12 each have an inlet and an outlet, and the separation chambers 10, 12 are joined together such that the inlets of the first and second chambers are adjacent, and the outlets of the first and second chambers are adjacent. An inlet port arrangement 28 connects both inlets to a single inlet pipe, and an outlet port arrangement 30 connects both outlets to a single outlet pipe.

An exemplary bulkhead (104A) connector assembly (100) includes a housing (106) having a first opening (138) and a second opening (130). The assembly (100) may further include a collar (108) that has a portion received within one of the first and second openings. The collar (108) may be rotatable to a latched position to hold a conduit (104B) within the housing (106). Further, the assembly (100) may have a detent (118) holding the collar (108) in the latched position when the detent (118) is moved to a locked position. The detent (118) in the locked position may have an indicator surface (112) providing tactile feedback indicative of the detent (118) holding the collar (108) in the latched position.

An adjustable flow line may include an outer pipe body having a first flange, an inner pipe body partially disposed within the outer pipe body and axially translatable with respect to the outer pipe body, a metal seal positioned between an outer surface of inner pipe body and an inner surface of the outer pipe body, a sleeve positioned around the inner pipe body and outside of the outer pipe body, and a second flange positioned around the inner pipe body, wherein when connected to the first flange. The sleeve may be axially translatable with respect to the inner pipe body. The second flange may axially secure the sleeve with respect to the outer pipe body and cause the sleeve to energize the metal seal.

In one embodiment, the invention is directed to a high-pressure bi-directional sealing system having circumferentially extending outer support rings (1520, 1900), annular, axial seals (1600, 1800) between the outer support rings (1520, 1900) and a circumferentially extending inner support ring (1700) located between the annular, axial seals (1600, 1800). The outer support rings (1520, 1900), seals (1600, 1800), and circumferentially extending inner support ring (1700) are located within a space between an outer tube (1502) and an inner tube (1504) that is telescopically disposed within the outer tube (1502). Seals (1600) and (1800) are oriented in opposite directions. Specifically, the opening of seal (1600) is facing in a first direction and the opening of seal (1800) is facing in a second direction that is opposite the first direction. This configuration enables the high-pressure bi-directional sealing system to handle pressure in both directions.

A multi-axis rotatable coupling element for a hose or pipe comprising a rotation assembly coupled between a female fitting and a male fitting. The female fitting has a first female threaded end connector for attachment to a hose or spigot, and a second end connector. The male fitting has a third male threaded end for attachment to a hose or spigot, and a fourth end connector. The rotation assembly consists of a first and second rotation member and a single continuous internal channel. The first and second rotation member are rotatable about a first and second axis of rotation, respectively, and have a first and second longitudinal bore for conveying fluid, respectively. The first and second axes of rotation may be different. The single continuous internal channel comprises at least the first and second longitudinal bore and conveys a fluid between the female fitting and the male fitting.

A fluid transfer conduit comprising: an electrically conductive tube of fibre reinforced polymer composite material which has an electrically conductive outer surface and an electrically conductive inner surface; and on at least one axial end of said conduit, a non-electrically-conductive band formed on either the outer surface or the inner surface of the electrically conductive tube. Forming a non-electrically conductive band on the end of the conduit electrically isolates the electrically conductive outer surface of the conduit from the electrically conductive metal socket into which it is to be inserted.