A seal assembly for an HVAC system includes a first block having a first aperture and a first sealing surface, a second block having a second aperture and a second sealing, and a conduit having a tube portion with an axially extending aperture and a flange extending radially outwardly from an end of the tube portion. The tube portion is disposed within the first aperture of the first block and the flange is disposed between the first sealing surface of the first block and the second sealing surface of the second block and is configured to deform when compressed therebetween. The seal assembly further includes an insert providing fluid communication between the aperture of the tube portion and the second aperture of the second block. A first end of the insert is received in the aperture of the tube portion of the conduit.

A method of borehole pipe installation begins with unfinished stick pipes brought to the installation site and then machined or cut to form male and female ends. The pipe ends are then locked together to form a flush joint. The lock can be provided via a groove cut into one of the ends for receipt of a lock gasket, which secures and seals the joint when the pipes are pushed together, and prevents the pipes from being pulled apart. Alternatively, to the groove and lock gasket, the ends can be glued and screwed together, with the screws allowing the joined pipes to be pulled through the borehole before the glue is dry. The pipe joint has flush exterior and interior surfaces to minimize borehole clearance and maximize fluid flow through the pipe assembly.

A method of borehole pipe installation begins with unfinished stick pipes brought to the installation site and then machined or cut to form male and female ends. The pipe ends are then locked together to form a flush joint. The lock can be provided via a groove cut into one of the ends for receipt of a lock gasket, which secures and seals the joint when the pipes are pushed together, and prevents the pipes from being pulled apart. Alternatively, to the groove and lock gasket, the ends can be glued and screwed together, with the screws allowing the joined pipes to be pulled through the borehole before the glue is dry. The pipe joint has flush exterior and interior surfaces to minimize borehole clearance and maximize fluid flow through the pipe assembly.

A pipe coupler for coupling pipes of different kinds with a one or more crown partially flexible heads, integrated into the ends of the pipe coupler for accommodating grip rings and seals for coupling pipes of different kinds. The crown heads have planes at different levels that form grooves for accommodating the seals, and a backward trimmed cone-shape inner surface plane and flat plane for locking the grip rings inside corresponding recesses in the crown head. The external surface of the grip rings is also cone-shaped that corresponds the shape of the inner surface of the crown head and in friction contact with this inner surface. The grip ring blocks the seal from slipping out, and has sets of teeth for engaging with and locking to a pipe inside the coupler. Clamp bands wrap around the external surface of the crown heads that yield against it, thereby tightening the grip of the teeth in the pipe as internal pressure increases inside the pipe and causes the grip ring to axially travel towards the proximal end of the crown head. All parts of the coupler are made of synthetic materials and thereby avoid corrosive processes.

A pipe coupler for coupling pipes of different kinds with a one or more crown partially flexible heads, integrated into the ends of the pipe coupler for accommodating grip rings and seals for coupling pipes of different kinds. The crown heads have planes at different levels that form grooves for accommodating the seals, and a backward trimmed cone-shape inner surface plane and flat plane for locking the grip rings inside corresponding recesses in the crown head. The external surface of the grip rings is also cone-shaped that corresponds the shape of the inner surface of the crown head and in friction contact with this inner surface. The grip ring blocks the seal from slipping out, and has sets of teeth for engaging with and locking to a pipe inside the coupler. Clamp bands wrap around the external surface of the crown heads that yield against it, thereby tightening the grip of the teeth in the pipe as internal pressure increases inside the pipe and causes the grip ring to axially travel towards the proximal end of the crown head. All parts of the coupler are made of synthetic materials and thereby avoid corrosive processes.

A nipple assembly includes nipple bodies configured so that one end portion of each of the nipple bodies is inserted into a housing so as to be coupled to a cooling medium inlet or a cooling medium outlet of a heat exchanger and a remaining end portion of each of the nipple bodies protrudes outwards from the housing, at least one first sealing unit sealing a gap between the one end portion of each of the nipple bodies and the cooling medium inlet or the cooling medium outlet, a flange portion formed at a position between two end portions of each of the nipple bodies to be coupled to the housing, and a second sealing unit including a first sealing portion sealing a gap between the flange portion and the housing and a second sealing portion configured to extend from the first sealing portion.

A pre-assembled pipe coupling includes a gasket, a housing surrounding the gasket, and a fastener. The housing has three segments sequentially coupled to each other to define an insertion boundary. A bridge segment has a first mount extending lateral from the wall and having a plurality of first lateral walls defining a first aperture and a second mount having a plurality of second lateral walls defining a second aperture. A first clamp segment has a first hook disposed in the first aperture. A second clamp segment has a second hook disposed in the second aperture. The fastener is disposed through the first fastener aperture and the second fastener aperture. The fastener has an adjusted length at which the first clamp segment grips the gasket, and the second clamp segment grips the gasket to locate the first sealing lip and the second sealing lip within the insertion boundary.

A sealing profile for embedding into a moulding of curable material, in particular a concrete or plastic moulding, and to a sealing arrangement comprising such a sealing profile. The object of the present invention is to provide a sealing profile for embedding into a moulding of curable material that can be anchored into the moulding in particular such that displacements of the seal in its seat occur to a significantly lesser extent, if at all, when installing or assembling the mouldings. The object is achieved by a sealing profile (1) with a profile region (2) having a profile region surface (4) which is directed towards the moulding (3) after embedding the sealing profile (1), wherein the profile region (2) has, at least in one subregion (6), a non-woven, felted or random fibre layer (5) which is fixedly connected to the sealing profile (1) and which extend beyond the profile region surface (4).

A sealing profile for embedding into a moulding of curable material, in particular a concrete or plastic moulding, and to a sealing arrangement comprising such a sealing profile. The object of the present invention is to provide a sealing profile for embedding into a moulding of curable material that can be anchored into the moulding in particular such that displacements of the seal in its seat occur to a significantly lesser extent, if at all, when installing or assembling the mouldings. The object is achieved by a sealing profile (1) with a profile region (2) having a profile region surface (4) which is directed towards the moulding (3) after embedding the sealing profile (1), wherein the profile region (2) has, at least in one subregion (6), a non-woven, felted or random fibre layer (5) which is fixedly connected to the sealing profile (1) and which extend beyond the profile region surface (4).

A coupling assembly having first and second sleeves configured to be tightened to a fluid conduit, a radial-split gasket configured to be positioned between the sleeves and the fluid conduit and having an outer gasket layer and a separate inner gasket layer configured to be selectively disengaged from each other, an inner circumferential surface of the outer gasket layer and/or an outer circumferential surface of the inner gasket layer comprising a plurality of circumferentially spaced retaining protrusions interfacing between the inner and outer gasket layers, each of the retaining protrusions having a separation portion and an engagement portion connected to the other gasket layer by a gasket layer connection such that the engagement portion will separate at the separation portion under an applied separation force prior to the engagement portion separating at the gasket layer connection.