Abstract: A connector for transferring a fluid includes a first connector and a second connector. Each connector includes a first outer portion including a first obstructive portion and defining a first fluid passageway for receiving a fluid therein. Each connector further includes a first central nozzle coupled to the first outer portion. The central nozzle includes a first engagement member. The first central nozzle is movable between a first position and a second position with rotation of the first outer portion. In the first position, the first obstructive portion and the first engagement portion substantially overlap to impede fluid flow through the first fluid passageway. In the second position, at least one of the first engagement member and the first obstructive member is displaced to allow fluid flow through the first fluid passageway.

Abstract: Provided is a hydraulic control valve in which a center bypass passage is not blocked, but is unloaded when a swing and an arm are operated at the same time to prevent the pressure in a hydraulic pump from being increased.

Abstract: The present invention discloses an integrated supplying apparatus for gas and sizing. It comprises a sizing barrel, a gas supply unit and a switching unit. The sizing barrel and the gas supply unit are both connected with the switching unit. When the switching unit is fixed in a first state by a safety cover, the gas supply unit can only output high pressure gas through the switching unit. When the switching unit is converted into a second state by releasing the safety cover, the gas supply unit in turn outputs some high pressure air into the sizing barrel through the switching unit, so that the sizing inside the sizing barrel is output under the action of the gas pressure and the gas inside the sizing barrel is then output when completing the output of the sizing.

Abstract: A female quick-connect coupling element for releasably joining pipes for pressurized fluid having a fluid flow duct and a valve for controlling the flow of fluid through the duct, wherein the valve has a first piston and a second piston that are mounted to move along a common axis (Y-Y?) relative to a body of the female element and wherein the first piston cooperates with a valve seat within the body of the female element, so as to close the valve, while the first and second pistons are interconnected via a mechanical link assembly and each of the pistons defines one of two opposite surfaces in contact with the fluid when the valve is open and wherein the mechanical link assembly is disposed outside the fluid flow duct.

Abstract: A female quick-connect coupling element for releasably joining pipes for pressurized fluid which receives, along a longitudinal axis, an end-piece of a male element, and has at least one locking member for locking the male element, and which includes a fluid flow duct and a valve for controlling the flow of fluid through the flow duct, which valve includes a movable piston element mounted to move relative to a seat, and wherein the female element also includes a discharge circuit for discharging fluid from the flow duct downstream from the valve seat and the flow duct including a hollow end-piece for bearing against a seal carried by a male element when fitted into the female element, and wherein the hollow end-piece includes an inner sleeve and an outer sleeve that are coaxial and mounted to move axially relative to each other, and in that a space defined between the two sleeves is in fluid communication with the discharge circuit.

Abstract: The invention relates to a method for filling a receptacle (200) with carbon nanotubes from another receptacle (106) whereby the CNTs are passed from one receptacle to the other by means of a coupling (300) comprising a double-valve device (30), each valve being coupled to one of the receptacles, the valves (31, 32) closing independently and tightly and being openable only when they are coupled to one another.

Abstract: This invention provides a chemical fluid flow channel coupling apparatus that couples and decouples chemical fluid flow channels. The coupling apparatus includes a first coupling unit; and a second coupling unit. The first coupling unit includes a first chemical fluid valve member chamber and a first valve member configured to open and close a first chemical fluid opening communicated with the first chemical fluid flow channel; and a purging fluid supply control valve configured to open and close the purging fluid supply flow channel. The second coupling unit includes a second chemical fluid valve member chamber, and a second valve member configured to open and close a second chemical fluid opening connected to the second chemical fluid flow channel; and a purging fluid discharge control valve.

Abstract: A fluid passage connection device includes a positioning mechanism that incorporates a male coupler attached to a stationary base member and a female coupler attached to a movable member, and that positions the movable member with respect to the base member so that it becomes possible to connect the male and female couplers, and a clamping mechanism that drives the movable member in order to clamp and fix the movable member with respect to the base member by the elastic force of a spring, and that also releases this clamping with the hydraulic pressure of a hydraulic cylinder; and the male coupler has a connection sleeve that is driven to retract by hydraulic pressure and is driven to advance by a spring, with a hydraulic passage being provided that interconnects a hydraulic pressure operation chamber of the connection sleeve and an unclamping hydraulic chamber of the hydraulic cylinder.

Abstract: An adjustable coolant quick coupler has a coolant supplier seat and a transmission seat that can be optionally connected or disconnected. The coolant supplier seat has a regulator assembly. The regulator assembly is able to adjust quantity of flow-in coolant and quantity of flow-out coolant. When the coolant supplier seat is connected to the transmission seat, the coolant can flow automatically from the coolant supplier seat to the transmission seat, so as to cool down electronic components inside a rack. When the coolant supplier seat is disconnected from the transmission seat, the coolant instantly stops flowing into the transmission seat. Because of the quick coupler, the rack installed inside a narrow space is convenient to set up or disassemble. Furthermore, by adjusting the quantity of flow-in coolant and the quantity of flow-out coolant, the electronic components can have a better effect of heat-dissipation.

Abstract: A quick coupler has a coolant supplier seat and a transmission seat that can be optionally connected or disconnected. When the coolant supplier seat is connected to the transmission seat, the coolant can flow automatically from the coolant supplier seat to the transmission seat, so as to cool down electronic components inside a rack. When the coolant supplier seat is disconnected from the transmission seat, the coolant instantly stops flowing into the transmission seat. Because of the quick coupler, the rack installed inside a narrow space is convenient to set up or disassemble.

Abstract: A quick release connector has a body, a positioning mount, a sealing valve and an outer sleeve. The body has a threaded end, a connecting end, an air inlet chamber, a mounting recess, a threaded recess, a first sealing ring, a pressing ring, a second sealing ring and a limiting ring. The positioning mount is detachably connected to the body and has a fixing end, an inserting end, an air outlet chamber, a returning spring, multiple ball holes and multiple balls. The sealing valve is movably mounted in the body and the positioning mount, selectively abuts the pressing ring and the second sealing ring and has a closed end, an open end and at least one air inlet. The outer sleeve is slidably mounted around the body and the positioning mount and has a spring recess, a holding recess and a pressing spring.

Abstract: Exemplary embodiments relate to a color changer module including an inlet channel, an outlet channel, a duct channel arranged between them to form a fluidic connection, and a first valve for interrupting the duct channel. A docking valve, lies fluidically in series with the first valve and with which the duct channel can also be interrupted.

Abstract: A connecting unit for a sanitary fitting is proposed, said connecting unit having, on one side thereof, plug-in sockets for connection to plug-in nipples of the sanitary fitting. On the opposite side, the connecting unit contains connections for the domestic installation pipes. The sanitary fitting and the connecting unit are connected by plugging in a direction parallel to the wall surface. The connecting unit may contain a flushing pipe which is designed as a continuous bore. When the connecting unit is not yet connected to the sanitary fitting, said flushing pipe can be used to flush out the pipes. Said flushing pipe is stopped from functioning when the connection between the sanitary fitting and the connecting unit is produced.

Abstract: In a cooling section having a plurality of coolant outlets, the coolant outlets are supplied with the coolant via transmission lines and a mutual main line. Individually opening and closing valves are disposed in the transmission lines. An automation device of the cooling section opens and closes the valves at valve-specific opening and closing times during the normal operation of the cooling section in order to apply coolant to the rolling stock according to a quantitative target coolant course. During the determination of the opening times, the automation device considers a respective valve-specific characteristic. In calibration operation of the cooling section, the respective characteristic is initially determined at least for some of the valves by opening and closing the respective valve, and detecting the chronological course of the quantitative coolant flow effected thereby by a measuring arrangement disposed in the main line.

Abstract: There is provided a hydraulic fluid control line connector including first and second couplings configured to automatically seal shut when the members are disengaged. There is further provided a method for blocking contamination or pressure transfer of hydraulic fluid control lines by securing first and second couplings to corresponding ends of a hydraulic line and automatically sealing the couplings shut when the couplings are disengaged.

Abstract: Self-cleaning apparatus and methods are disclosed for handling viscous fluids, such as thick solid-liquid slurries of lignocellulosic biomass and its components, under high pressure, using an array of retractable valves.

Abstract: A ball valve is provided for threaded connection to a separable component 72 having male threads 74. A housing 10 contains a ball 12 selectively rotatable for passing fluid through the housing, and a flange member 20 threadably secured to the valve housing. A stop ring 16 is positioned outward of the valve housing and engages the flange member. A coupling 20 is threadably secured to the stop ring and includes female threads for engagement with male threads on the separable component.

Abstract: The present invention relates to a cartridge which comprises separate temperature and flow adjusting shafts whereby temperature and flow adjustments can be controlled separately from each other and where, if desired, the flow adjusting cartridge (3) and the temperature adjusting cartridge (4) can be separated from each other to be used in different mechanisms independent of each other.

Abstract: A male connector includes a connecting member which has a cone-shaped exit defined therein and the connecting member is connected to a pipe connector to define a space therebetween. A movable member has a cone-shaped end and multiple openings are defined through the wall of the movable member. The movable member is movably located in the space and the cone-shaped end seals the cone-shaped exit of the connecting member along the direction of the fluid. The cone-shaped end has multiple grooves or release holes to slowly release the residual pressurized fluid of the pneumatic tool or the hydraulic tool so as to safely separate the male and female connectors and mitigate the noise.

Abstract: An encapsulated valve system includes a first housing portion having a first facing surface, the first facing surface comprising a plurality of branch pathways formed as a recess within the first facing surface. The valve system further includes a second housing portion having a second facing surface, the second facing surface comprising a plurality of branch pathways formed as a recess within the second facing surface. A disposable conduit is configured to be interposed between the first and second housing portions and disposed within the recess of the first facing surface and the recess of the second facing surface. The disposable conduit is thus sandwiched between the first and second facing surfaces. A plurality of pinch valve actuators are mounted on one or both of the first housing portion and the second housing portion, the plurality of pinch valve actuators configured to pinch the disposable conduit at selective branch pathways.

Abstract: A flow control device is provided with a first body having a first port through which pressure fluid is supplied, and a second body which is installed on the first body. A valve mechanism which controls the circulation state of the pressure fluid that circulates from the first port to a second port is provided inside this first body. Furthermore, a first connecting section of the first body is inserted into and engaged with the inside of a second connecting section formed at the upper end of the second body, resulting in the first body and the second body being integrally connected together.

Abstract: The present invention relates to a compact cartridge coupling of the type adapted to connect a pressurized fluid line between a vehicle or apparatus and a user, which coupling is of the type comprising a female semi-coupling adapted to receive a male semi-coupling. The cartridge coupling according to the present invention is characterized in that it comprises decompression means adapted to moderate the pressure inside the female semi-coupling thus allowing a male semi-coupling under pressure to be coupled and allowing the male to be disconnected while leaving pressure in the user line. Moreover, the cartridge coupling is characterized by a 3:1 hydraulic unbalancing system between the pressure force acting on the female valve assembly and that acting on the male valve assembly.

Abstract: A socket for a fluid-transfer coupling device (5) that communicates a flow path in the socket with a flow path in a plug (70) since the socket (10) and the plug are connected to each other, includes a mount panel attachment (17) arranged in the vicinity of an entry (19) of the socket allowing the plug to be inserted, and attaching the socket to a mount panel (18) and a support (35) arranged in a different position from the entry and supporting the socket. Consequently, the socket can be stably supported on the mount panel even if the flow rate of fluid is large. It is preferable that at least one part of the socket is constructed in a spigot-and-socket manner.

Abstract: A subsea coupling comprises a male coupler having a probe and a female coupler comprising a socket for the reception of the probe. The couplers each include a valve which is openable on mating of the couplers to provide communication with the socket. The socket includes a recess accommodating an annular seal for providing a radial seal between the probe and the socket. In one embodiment the leading edge of the probe includes at least one relief channel for allowing the escape of hydraulic fluid entrapped between the probe, the seal and the recess when the couplers are made up. There may be a stand-off ring disposed between one end of the recess and the inner side of the seal. In another embodiment the relief channel is provided in the socket.

Abstract: A pressure reducing system for fuel gas and a natural gas dewaxing vehicle are disclosed. The pressure reducing system (6) comprises fuel gas pipelines which consist of successively connected a high pressure pipeline (41), a medium pressure pipeline (42) and a low pressure pipeline (43) in the flow direction of fuel gas. The tail end of the low pressure pipeline (43) connects with an combustion apparatus (7). A high pressure relief valve (17), a high pressure air feed valve (21), a heat exchanger (24) and a primary pressure reducing valve subassembly are connected on the high pressure pipeline (41). The heat exchanger (24) is provided with a hot fluid inlet (24A) and a hot fluid outlet (24B), wherein the hot fluid inlet (24A) connects with an hot water apparatus (12), and the hot fluid outlet (24B) connects with an water storage apparatus. The medium pressure pipeline (42) is equipped with a medium pressure relief valve (27) and a secondary pressure reducing valve (29).

Abstract: A coupler mechanism comprising plug and receptacle units sealably mates and de-mates first and second reservoirs. In the mating sequence, the plug and receptacle units are brought together so that their end-seals are pressed tightly against each other axially, thus forming a sealed barrier between the units and the outside environment. Once the face-to-face seal between the units has been established, further engagement displaces slidable seal elements laterally, thereby creating an opening between the reservoirs, the opening remaining sealed from the outside environment before, during and after mating. The sequence for demating the units is just the reverse of the mating sequence. One embodiment of the invention applies the aforementioned construction to harsh-environment electrical, fiber-optical, and hybrid electro-optical connectors.

Abstract: A male adaptor is provided with a nose for penetrating into a housing of the female connector. A septum is disposed over the nose of the male adaptor to maintain a seal with the female connector during coupling and uncoupling. Upon coupling, the septum dilates to allow the nose to pass through. The female connector may have a septum that also dilates to allow penetration of the nose of the male adaptor. Alternatively, the septum of the female connector may be retractable under the force of the nose of the male adaptor.

Abstract: A fluid connector device is provided. The fluid connector device comprises a coupling substrate comprising a conformal recess, a reconnectable fitting corresponding to the conformal recess, and a guiding device. The guiding device comprises a base component, a body at least partly disposed in the base component and comprising a broad end and a narrow end, wherein the broad end is disposed away from the coupling substrate, and wherein the body is slidably disposed in the base component, and a resilient component disposed on the body of the guiding device and configured to move the reconnectable fitting one or more degrees in a translational, or a rotational direction, or both, relative to the coupling substrate.

Abstract: A coupling frame formed at a connecting portion on an out-port side of a first safety valve, and a coupling frame formed at a connecting portion on an in-port side of a second safety valve are brought into contact with each other, directly or by causing a plate-shaped member to intervene in between. Coupling projections, facing each other, formed in the coupling frame of both the safety valves are sandwiched between a pair of latch portions of a latch member, and a pair of latch members facing each other, are mutually drawn by tightening rod members. The coupling projections of both the safety valves are thereby pressed in a mutually approaching direction with the latch portions of each of both the latch members, and thereby both the safety valves are coupled.

Abstract: Improved latching connectors that can be used to connect a fluid system, such as manufacturing, test, or processing equipment, to an external system, for example charging, evacuation and/or testing equipment. In one embodiment, the connector includes elements by which to protect connector seals from being exposed to fluid being transferred, thereby lengthening the lifetime and reliability of the connector. In another embodiment, the male connector portion and the female connector portion are both valved in a normally closed position. The connector is designed to achieve connection of the male portion to the female portion, and sealing between the male portion and the female portion, prior to the valves in each connector portion being opened and fluid flowing through the connector. The latching connector includes a pressure locking sleeve that, once the connector is under pressure, locks the connector to prevent accidental disconnection.

Abstract: An appliance including at least two surface burners and a burner control system configured to selectively allow individual control of each of the at least two burners or simultaneous control of the at least two burners as a unit.

Abstract: An aseptic fluid connector having a first connector including a first fluid passageway for receiving a fluid therein; a first port in fluid communication with the first fluid passageway for passage of the fluid therethrough; and a first deflecting member. The first deflecting member includes a first engaging portion radially spaced relative to the first port, and a first valve movable between a closed position and an open position with movement of the first engaging portion between a non-deflected position and a deflected position, respectively. In the non-deflected position, the first valve is located in the closed position forming a fluid-tight seal between the first valve and first port and preventing the passage of fluid therethrough, and in the deflected position, the first valve is located in the open position allowing the aseptic passage of fluid through the first port.

Abstract: A plurality of solenoid valves are installed on a valve mount surface of a manifold base to receive a pressure fluid supplied from a supply passage of the manifold base via a supply communication hole. A stop valve base connected to a side surface of the manifold base has a stop valve mount surface formed on the upper surface to the side of the valve mount surface. The stop valve is attached to the stop valve mount surface to open and close the supply communication hole by pushing and pulling the stop valve from a side with the solenoid valve.

Abstract: A quick coupling (100) comprising a first element (50) and a second element (60) which may be separably coupled is described; the first element (50) mainly including an external sleeve (1) with hooking means (3), a connector (2) for user interface (25), and at least one valved coupling (16) for at least one pressure line (9, 10), the second element (60) mainly including hooking means (13, 15, 70), at least one valved coupling (17) for at least one pressure line (20, 21), and a connector (12) for user interface (122). Said second element (60) further comprises a safety ring nut (11) along the circumference of which safety pins (14) are provided, adapted to be pushed by said hooking means (15, 70) into seats (4) of the external sleeve (1).

Abstract: A sanitary fitting includes a joint arrangement having a support connection piece that defines an abutment face that is at least approximately flat; a joint part that rests flat against the abutment face by way of an at least approximately flat mating face, and defines a neutral position; a spring that is supported at one end against the support connection piece and at the other end against the joint part, the spring using a spring force to push the joint part against the abutment face by way of the mating face; and a rod-like extremity that is arranged on the joint part at a fixed angle in relation to the mating face.

Abstract: A ball valve is provided for threaded connection to a separable component 72 having male threads 74. A housing 10 contains a ball 12 selectively rotatable for passing fluid through the housing, and a flange member 20 threadably secured to the valve housing. A stop ring 16 is positioned outward of the valve housing and engages the flange member. A coupling 20 is threadably secured to the stop ring and includes female threads for engagement with male threads on the separable component.

Abstract: A suspension system includes four electronically controlled actuators, one at each of the four wheels. The actuators are each controlled by an electronic control unit. The left front and right front actuators are mechanically connected with each other. The left rear and the right rear actuators are also mechanically connected with each other. The only connection between the front two actuators and the rear two actuators is an electronic communication through the electronic control unit.

Abstract: A method includes associating a plurality of valve balancing units with a plurality of valves in a hydronic network. The method also includes adjusting a setting of at least one of the valves using at least one of the valve balancing units to balance the hydronic network. Adjusting the setting could include identifying a differential pressure across a valve and a flow rate of material through that valve. Adjusting the setting could also include comparing the identified differential pressure to a target differential pressure and/or the identified flow rate to a target flow rate. Adjusting the setting could further include instructing an actuator to adjust the setting until the identified differential pressure is within a first threshold of the target differential pressure and/or the identified flow rate is within a second threshold of the target flow rate.

Abstract: Methods and related systems are described for controlling inflow of fluid into a production string. In aspects, the invention provides an inflow control device with a shut-off feature that is operated automatically utilizing swellable materials.

Abstract: A novel valve assembly is provided. In one embodiment, the valve assembly includes a seat plate having a plurality of fluid conduits. The valve assembly may also include a plurality of poppet assemblies. In some embodiments, a poppet assembly of such a plurality includes at least one fluid port and a housing configured to be coupled to the seat plate to facilitate flow of a fluid through a respective fluid conduit via the at least one fluid port of the respective poppet assembly. Other devices, systems, and methods related to poppet assemblies are also disclosed.

Abstract: A fuel cell (100) is mounted with a fuel cartridge (1220) in a detachable manner. The fuel cartridge (1220) is provided with a connecting part (1225) and the fuel cell (100) is provided with a fitting part (1205) into which the connecting part (1225) is fitted. The fuel cell (100) identifies the fitted fuel cartridge (1220).

Abstract: A leak preventing structure is provided with a first unit, a second unit and an absorbing member. The first unit includes a first casing, a convex portion, and a first passage which is open in an end of the convex portion. The second unit includes a second casing, a concave portion which includes an inner circumferential wall and a bottom wall and into which the convex portion is to be inserted, and a second passage which is open in the bottom wall of the concave portion and which is to be connected to the first passage. The absorbing member is provided on the inner circumferential wall of the concave portion, which is to be interposed between the inner circumferential wall of the concave portion and the outer circumferential surface of the convex portion and is configured to absorb a fluid.

Abstract: The invention concerns an emergency disconnection system, in particular for a fluid loading arm, of the kind having two valves which are coupled using a collar with controlled opening, an actuator (400) provided with a single rod (401), and single axis kinematics such that a movement of the rod (401) over a first portion of its travel closes the two valves and over the remainder of its course, opens the collar, characterized in that the actuator comprises means adapted to ensure the movement of the rod (401) over said two portions of travel and independently controlled over each of said portions, said means acting coaxially or substantially coaxially.

Abstract: The present invention provides a gas valve arrangement having at least one main valve that has a valve closure element which is connected with a fluid-actuated drive device. A pilot valve is connected to the drive device so as to control it by a pilot fluid flow, and which has a piezoelectric actuation element for influencing the pilot fluid flow. A control device is connected with the pilot valve and acts on it with an alternating voltage so as to open the main valve.

Abstract: A gas reclaim regulating valve assembly is described as comprising two chambers by which a diver's exhaled gases can be captured and sent to a gas recovery unit above the water surface. The gas reclaim regulating valve connects to an inlet tube from which the diver's exhaled gas travels from a switchblock. The switchblock attaches to the diver's helmet by way of a switchblock mounting plate. On the opposite end of the switchblock from the mounting plate is a moveable handle by which the circuit to the gas reclaim regulating valve may be opened or closed using one hand. When the circuit is closed, the exhaled gases travel through the inlet tube to the gas reclaim regulating valve wherein it flows through two chambers and out to the gas recovery unit. When the circuit is open, the exhaled gases are expelled out of the system via a one-way valve.

Abstract: A fluid dispensing tool includes parallel spaced first and second manifolds supporting therebetween an elongated actuator unit having a tubular body confining a piston connected to move a valve actuator stem projecting into a releasable coupler mounted on the second manifold. The manifolds also support therebetween a plurality of elongated valve units each having a tubular valve body defining a valve chamber and a chamber receiving a piston connected to move an elongated valve member. Each valve body has a port for receiving a corresponding fluid supply line or an evacuation line. The first manifold has separate passages connecting air control lines to the piston chambers for moving the actuator stem and each valve member axially. The second manifold has a fluid passage connecting each valve chamber to the coupler, and a handle supports the tool and a finger actuator connected to the coupler.

Abstract: A gas supply piping system suitable for transporting a gas to a machine terminal from a gas supply terminal is provided, which includes a main supply pipe, a plurality of branch supply pipes, a plurality of purifiers, a plurality of first valves and a backup piping. The main supply pipe is connected to the gas supply terminal. The branch supply pipes are connected the main supply pipe and the machine terminal respectively. The purifiers are connected to the branch supply pipes respectively. The first valves are connected to the branch supply pipes respectively and located between the purifiers and the gas supply terminal. The backup piping is connected to the branch supply pipes and disposed between the purifiers and the machine terminal.

Abstract: In accordance with the present invention, these and other problems in the prior art are addressed by providing a valve which comprises a valve body which includes an passage that extends at least partially therethrough, a valve seat which is formed in the passage, a valve member which is movably positioned in the passage proximate the valve seat, a first sealing element which is supported on the valve member and which in a closed position of the valve engages the valve seat to block fluid flow through the passage, and a protective member which is movable relative to the valve member between a first position in which the protective member substantially covers the first sealing element when the valve is in the open position and a second position in which the protective member is retracted from the first sealing element when the valve is in the closed position.

Abstract: According to the present invention, a cross over nozzle (10) is provided of two parts (22,24) which, when joined, define a housing (20) having a passage (30) extending therethrough, a tapered valve seat (50) extending about the passage and a value member (60) having a tapered valve head (62) disposed in the passage for engaging the valve seat. The two parts (64,66) are axially separable at an interface (68) extending through the valve seat/valve head. In order to open the valve, both valve parts are first joined and then moved together as one member in the same direction relative to the housing axially away from the valve seat. Similarly, the valve members are jointly moved into engagement with the valve seat before the cross over nozzle is separated. Accordingly, unlike the valve gate design, the valve interface between the two parts of the valve head isn't exposed to molten resin and therefore molten resin isn't trapped therebetween to cause a string upon opening.

Abstract: A connector for piping destined to the transfer of fluid at very low temperature, in particular liquefied natural gas is described. The coupling comprises a first and a second length of piping (8, 9) that are provided with respective closing valves (20, 27) and destined to be fastened, respectively, to a piping (2) for the inflow of the fluid and to a piping (6) for the receiving of the fluid. Onto the second length of piping (9) a quick-coupling mechanism (34) is mounted that comprises a circumferential sequence of jaws (36) that are suitable to provide a firm front coupling between terminal flanges (12, 17) of the two lengths of piping (8, 9), and means (35 38) for the driving of the jaws. Each one of said lengths of piping (8, 9) is surrounded by an external coating band (23, 30) that defines with said length of piping a thermally insulating interspace (25, 32).