A conduit, particularly flexible conduit comprises an inner tubular housing, at least one reinforcing layer at least partially disposed around the inner housing, an outer protective sheath at least partially disposed around the at least one reinforcing layer, and optionally a thermally insulating layer disposed between the at least one reinforcing layer and the outer protective sheath. At least one of the outer protective sheath and the thermally insulating layer comprises a thermoplastic vulcanizate composition.

A conduit, particularly flexible conduit comprises an inner tubular housing, at least one reinforcing layer at least partially disposed around the inner housing, an outer protective sheath at least partially disposed around the at least one reinforcing layer, and optionally a thermally insulating layer disposed between the at least one reinforcing layer and the outer protective sheath. At least one of the outer protective sheath and the thermally insulating layer comprises a thermoplastic vulcanizate composition.

A rubber composition for a cover layer of a hydraulic hose includes: ethylene vinyl acetate copolymer (EVA); and ethylene-propylene-diene terpolymer (EPDM). In an embodiment, the composition includes ethylene vinyl acetate copolymer (EVA) and ethylene-propylene-diene terpolymer (EPDM) and additives. The additives may include carbon black with a content of around 15 phr, silica with a content of around 20 phr, di-octyl adipate with a content of around 18 phr, aluminium hydroxide with a content of around 124 phr, magnesium hydroxide with a content of around 30 phr, and other chemicals with a content of around 20 phr. The other chemicals may include zinc oxide, peroxide curative, antioxidant, coagents and processing aids.

A rubber composition for a cover layer of a hydraulic hose includes: ethylene vinyl acetate copolymer (EVA); and ethylene-propylene-diene terpolymer (EPDM). In an embodiment, the composition includes ethylene vinyl acetate copolymer (EVA) and ethylene-propylene-diene terpolymer (EPDM) and additives. The additives may include carbon black with a content of around 15 phr, silica with a content of around 20 phr, di-octyl adipate with a content of around 18 phr, aluminium hydroxide with a content of around 124 phr, magnesium hydroxide with a content of around 30 phr, and other chemicals with a content of around 20 phr. The other chemicals may include zinc oxide, peroxide curative, antioxidant, coagents and processing aids.

A method for manufacturing a flexible air duct includes: winding a strip made from fabric over a turn around the core with a non-zero angle of incidence , considering the direction of travel of the strip relative to a plane perpendicular to the axis of the core, so that one edge of the strip is covered by overlapping of the other edge of the part of the strip approaching the core, rotating the strip around the core, continuously joining the two overlapping edges together by means of a sewing head or a welding head or a gluing head, provided with means for translating the fabric, characterized in that it consists of using the means for translating the fabric in order to continuously wind the strip around the core.

A method for manufacturing a flexible air duct includes: winding a strip made from fabric over a turn around the core with a non-zero angle of incidence , considering the direction of travel of the strip relative to a plane perpendicular to the axis of the core, so that one edge of the strip is covered by overlapping of the other edge of the part of the strip approaching the core, rotating the strip around the core, continuously joining the two overlapping edges together by means of a sewing head or a welding head or a gluing head, provided with means for translating the fabric, characterized in that it consists of using the means for translating the fabric in order to continuously wind the strip around the core.

A tapered flexible conduit and a ventilation system incorporating the same. The conduit is arranged to extend between a register and a fan assembly, such as in a whole house fan (WHF) system. The conduit includes a flexible inner liner surrounded by a flexible outer liner. The flexible inner liner has a length of helically formed wire coupled to a flexible membrane. The flexible outer liner includes an insulative layer to provide acoustic baffling for an airflow established by the fan assembly passing through the conduit. The tapered conduit has a frusto-conical shape along an overall length of the conduit to sealingly engage differently sized inlet and exhaust ports of the register and the fan assembly, respectively. The collapsible nature of the respective inner and outer liners reduces bulk during shipment and accommodates a variety of different configurations during installation.

A line-shaped assembly includes a heat source that includes a heat source main body extending straightly and a heat source cover member covering the heat source main body, and a tubular-shaped heat source protective member that accommodates and protects the heat source. The heat source protective member is made of resin, and includes a first tube body portion with an inner surface that has a small area per unit length in an axial direction of the heat source protective member in contact with the heat source, and a second tube body portion with an inner surface that has a contact area larger than that of the first tube body portion.

A line-shaped assembly includes a heat source that includes a heat source main body extending straightly and a heat source cover member covering the heat source main body, and a tubular-shaped heat source protective member that accommodates and protects the heat source. The heat source protective member is made of resin, and includes a first tube body portion with an inner surface that has a small area per unit length in an axial direction of the heat source protective member in contact with the heat source, and a second tube body portion with an inner surface that has a contact area larger than that of the first tube body portion.

A flexible duct for handling conditioned air comprises an inner core, a vapor barrier, and a compressible core spacer positioned between the inner core and vapor barrier. The compressible core spacer is made of a film material with a helical support integrated therewith. The compressible core spacer is made of a length longer that the inner core and other duct components so that when the compressible core spacer is compressed when assembling the inner core and vapor barrier, the film material between adjacent sections of the helical support folds to create a spacer-liker construction that creates air gaps between an outer surface of the inner core and an inner surface of the compressible core spacer and outer surface of the inner core and vapor barrier. With a pair of low-e surfaces associated with the compressible core spacer or the compressible core spacer and inner core, reflective insulation systems are created to improve the insulating value of the insulated flexible duct.