Abstract: Provided are an installation method and an installation device for a fluid control device capable of improving controllability of a fluid in a pipe by improving positional accuracy of a valve body inserted into a hole formed in a fluid pipe in a housing and decreasing the size, weight, and cost of construction equipment such as an operation valve device or an installation device of a fluid control valve.

Abstract: In embodiments, a hot tap clamping system comprises a clamp which fits over and secures against a pipe, an actuator interface, an actuator operatively in communication with clamp, and a hot tap assembly. In a further embodiment, a system for sealing a flowline with a metal seal after hot tapping comprises a sealer, a hot tap drill/plug running tool, and a metal seal plug which is typically configured for use in sealing a flowline, e.g. a pipe, with a metal seal after hot tapping where the metal plug seal is inserted into the pipe and engages with and seals as a hot tap.

Abstract: A refrigerant charging hose assembly including a can tap connectable to the self-sealing valve of a R-1234yf refrigerant can with a one-half inch ACME left-handed thread on a self-sealing cap, a length of refrigerant charging hose, and a coupler fitting on the other end connectable to an R-1234yf automotive air conditioning system. An alternate embodiment of the refrigerant charging assembly can serve as a refrigerant charging and pressure testing hose assembly and includes a pressure gauge installed in the hose between the can tap and the coupler fitting.

Abstract: A blowout preventer and method of closing a wellbore. The blowout prevented has a main body containing a wellbore, a passage transverse to the wellbore, a shearing device located in the passage; and a charge that, when activated, propels the shearing device along the passage and across the wellbore to close the wellbore and prevent a blowout.

Abstract: Provided are a boring apparatus of a specials tube and a boring method using the same. The specials tube for connecting a primary pipe and another pipe includes a main pipe having one end coupled to an outer surface of the primary pipe and having a length formed outside of the primary pipe in a diameter direction, a branch pipe branched from the main pipe, and a boring tap disposed at the other end of the main pipe, wherein a boring hole is formed on an outer surface of the main pipe by adjusting the boring tap in a state where the main pipe is sealed, whereby leakage of a fluid flowing in the primary pipe to the outside may be prevented during a branching operation of a pipe.

Abstract: In embodiments, a hot tap clamping system comprises a clamp which fits over and secures against a pipe, an actuator interface, an actuator operatively in communication with clamp, and a hot tap assembly. In a further embodiment, a system for sealing a flowline with a metal seal after hot tapping comprises a sealer, a hot tap drill/plug running tool, and a metal seal plug which is typically configured for use in sealing a flowline, e.g. a pipe, with a metal seal after hot tapping where the metal plug seal is inserted into the pipe and engages with and seals as a hot tap.

Abstract: The present invention is directed to a method of salvaging an elongated oil well tubular that extends downwardly from an oil well platform as well as a saw apparatus of improved configuration. The method includes supporting the tubular in a generally upright or vertical position. A cutting apparatus is placed next to the tubular. The cutting apparatus includes a frame that supports a lifting device and a rotary cutter. The lifting device moves the rotary cutter from a first position to a second position that is higher than the first position. The second position is closer to the tubular than the first position. The rotary cutter can travel in an arcuate path when moving from the first position to the second position. The cutter moves along a selected path to cut the tubular. After cutting, the cut section is removed and the tubular then elevated so that an additional cut can be made. This procedure is repeated multiple times until the tubular has been salvaged, cut into many smaller pieces or sections.

Abstract: A spacing connector used for assembling formworks and made up of at least one crosspiece, the crosspiece being connected, at both of its opposite ends, with at least one respective connection portion suited to make a connection with at least one panel of such formwork, the spacing connector also including at least one transpiration duct featuring two respective end openings, each of the end openings leading to a respective connection portion. Also disclosed is a formwork system including the spacing connectors.

Abstract: A check valve comprises a valve housing defining an opening and a plurality of flapper elements each having a proximal end and a distal end. The flapper elements are pivotally mounted to the valve housing at their proximal ends for pivotal movement between a closed position, in which they block the flow of fluid through the opening and an open position in which they permit the flow of fluid through the opening. Each flapper element is generally triangular or trapezoidal in shape such that the flapper elements together create a generally conical or frustoconical surface when the valve is in the closed position. A resilient band extending around a circumference of the conical or frustoconical surface defined by the plurality of flapper elements in the closed position for biasing the flapper elements towards the closed position.

Abstract: The flow path opening/closing portion replacement device comprises a first enclosing portion having a first opening and a shutter, and enclosing, in a state where the shutter has closed the first opening, an end portion of a converging pipe through which a fluid passes and a valve which is attached to the end portion; a second enclosing portion having a detachable member enabling the valve to be detached and a second opening which can be contiguous with the first opening and enabling removal/insertion of the detachable member, and enclosing the valve together with the first enclosing portion in a contiguous opening state in which the first opening and the second opening are contiguous, wherein, in a state where the second enclosing portion has enclosed the valve together with the first enclosing portion in the contiguous opening state, the valve can be replaced by the detachable member.

Abstract: A method of manufacturing a packing cup for a hyper-compressor is described. The method comprises the following steps: providing an inner disc (25), having opposed first front face (25X) and second front face (25Y), a central axial hole (18) and at least one lubrication-oil duct (23); autofrettaging the lubrication-oil duct (23); after autofrettaging, removing a thickness (D) of the inner disc on both faces thereof.

Abstract: A package including a fitment for dispensing a liquid from a flexible bag is disclosed. The fitment is secured to the bag and includes a compressible bulb and a piercing member that are coupled together. In two embodiments the fitment is configured so that the piercing member pierces through a wall of the bag to dispense the bag's contents through an outlet port of the fitment. One of those embodiments includes a separate valve to open and close the outlet port. Another embodiment does not include a separate valve to open and close the outlet port. A third embodiment makes use of a fitment connected to a filling gland of the bag and which is in communication with the interior of the bag. That third embodiment includes a frangible seal forming part of the fitment and which is pierced by the piercing member to dispense the liquid from the bag.

Abstract: Provided is a snap tap mounting jig for mounting a snap tap where the generation of buckling can be prevented by reducing a diameter enlarging pressing force of a diameter enlarging roller, a shim can be mounted on both end surfaces of the diameter enlarging roller, and a fold-back deformation amount of a metal sleeve can be checked from the outside. The snap tag mounting jig is also characterized as follows. The diameter enlarging roller is formed into a hyperboloid shape, and the recessed portion is formed such that a substantially upper half portion of the diameter enlarging roller mounted obliquely is formed into a substantially tapered shape, and a substantially lower half portion of the diameter enlarging roller mounted obliquely is formed into a rounded shape.

Abstract: A system and method for accessing a gas main is provided. The system including a drip riser having an interior portion and a first quick-connect coupler, the first quick-connect coupler being fluidly coupled to the interior portion. A riser attachment device is provided having a second quick-connect coupler, an open end, and a valve disposed between the second quick-connect coupler and the open end. The second quick-connect coupler is configured to removably couple with the first quick-connect coupler. The first quick-connect coupler and second quick-connect coupler cooperate to fluidly couple the open end to the interior portion when the riser attachment device is coupled to the drip riser and the valve is opened.

Abstract: A blowout preventer and method of closing a wellbore. The blowout prevented has a main body containing a wellbore, a passage transverse to the wellbore, a shearing device located in the passage; and a charge that, when activated, propels the shearing device along the passage and across the wellbore to close the wellbore and prevent a blowout.

Abstract: An apparatus for providing access to pressurized pipes includes a body member configured to be attached to a pipe or vessel or a fitting coupled to a pipe or vessel. The body member has an internal barrel in fluid communication with the pipe or vessel or fitting when the body member is attached to the pipe or vessel or fitting. A hollow piston is slidable axially within the internal barrel, and the apparatus is configured such that when an internal volume of the piston is pressurized by a fluid from the pipe or vessel, a force exerted by pressurized fluid on the piston in an axial direction is opposed by a force exerted by pressurized fluid on a counter-pressure portion of the piston. The apparatus includes a conduit orifice that allows a conduit to be disposed therethrough so as to pass into the apparatus to an interior of the piston.

Abstract: Systems, methods and apparatuses for servicing a refrigeration system are described herein. A system may include a fluid source and a device is capable of coupling to the fluid source, a measuring device and a fluid receiving system. The device may include a valve disposed passage disposed in a body of the apparatus that communicates with the fluid source, the measuring device and the fluid receiving system. A portion of the valve being engageable with a self-sealing valve of the refrigerant supply while inhibiting fluid flow between the fluid source and the measuring device and/or between the measuring device and the fluid receiving system.

Abstract: The present invention is directed to a method of salvaging an elongated oil well tubular that extends downwardly from an oil well platform as well as a saw apparatus of improved configuration. The method includes supporting the tubular in a generally upright or vertical position. A cutting apparatus is placed next to the tubular. The cutting apparatus includes a frame that supports a lifting device and a rotary cutter. The lifting device moves the rotary cutter from a first position to a second position that is higher than the first position. The second position is closer to the tubular than the first position. The rotary cutter can travel in an arcuate path when moving from the first position to the second position. The cutter moves along a selected path to cut the tubular. After cutting, the cut section is removed and the tubular then elevated so that an additional cut can be made. This procedure is repeated multiple times until the tubular has been salvaged, cut into many smaller pieces or sections.

Abstract: The present flow-undisrupted process includes: enclosing a portion of an existing pipe with a sealing case; connecting a boring machine to the sealing case in a non-valve state in which no operation valve is interposed between a projecting pipe portion of the sealing case and the boring machine; forming a circular opening in an area of the existing pipe corresponding to the projecting pipe portion by means of a hole saw of the boring machine; rotating a tee and the boring machine in a circumferential direction of the existing pipe to a position at which the projecting pipe portion is completely past the opening; after the rotation, maintaining a sealed state in which the seal packing prevents a pressure of a fluid inside the existing pipe from being applied to the projecting pipe portion; and removing the boring machine from the projecting pipe portion in the sealed state.

Abstract: A gate valve for a chemical plant including a valve housing having an upper opening and an opposite lower opening; an upper sealing seat and a lower sealing seat disposed on the valve housing; a valve gate movably disposed in the valve housing, for blocking a path between the openings in a closed position and opening said path in an open position, the valve gate comprising a first plate having lower surface with a blind recess and a second plate at least partially disposed in the blind recess; wherein, in the closed position, the upper sealing seat sealingly engages the first plate, the lower sealing seat sealingly engages the second plate and the second plate is at least indirectly in contact with the first plate.

Abstract: A valve apparatus (10) comprises a housing (12) defining a flow path (14), a valve seat (42) located within the housing (12) around a periphery of the flow path (14), a carriage member (16) located within the housing (12), a cutting arrangement (28) mounted on the carriage member (16), and a valve member (32) mounted on the carriage member (16) via a connection assembly (34) which permits relative movement between the valve member (32) and the carriage member (16). The carriage member (16) is moveable from a first position towards a second position to drive the cutting arrangement (28) across the flow path (14) and to move the valve member (32) into a position in which relative movement between the valve member (32) and the carriage member (16) permits the valve member (32) to sealingly engage and disengage the valve seat (42) to control flow along the flow path (14).

Abstract: A tool assembly configured for location on a section of a pipe is operable to both isolate a section of the pipe and perform an intervention into the pipe while maintaining pressure integrity. The tool assembly includes a clamp, a cutting tool and an isolation tool. In use, the clamp sealingly secures the tool assembly to the pipe, the cutting tool performs an intervention operation on the pipe, and the isolation tool isolates the section of pipe in order that repair or replacement of equipment can be effected.

Abstract: An irrigation system designed to provide water to indoor plants comprising a water reservoir containing water, a water pump submerged in the water within the reservoir and connected to a power source, a timer operatively associated with the water pump and power source, wherein the timer operates to activate and deactivate the water pump at intervals determined by the system user, one or more sections of tubing secured at one end to the water pump to direct water pumped from the water reservoir through the tubing to the indoor plants and one or more emitters secured to the opposite end of the tubing wherein the emitters are located within a pot or near the indoor plants that the system user wants to water and wherein the emitters are selected from the group consisting of: pressure adjustable drippers, pressure adjustable sprayers, pressure adjustable soaker hoses, or a combination thereof.

Abstract: Modular valve manifold system including a distribution tube and at least one valve mounted on the tube. Each valve has a body with an external port disposed along one of a first and a second radial axis, and a throughbore disposed along the other one of the axes and configured to receive the tube coaxially therethrough. The body is formed of a first body portion and a second body portion. The first body portion has a first face with a first channel formed therein defining a first portion of the throughbore and configured to be mounted on a first side of the tube. The second body portion has a second face with a second channel formed therein defining a second portion of the throughbore and configured to be mounted on the second tube side.

Abstract: A fuel control system includes a high pressure relief valve fluidly connected to a fuel pump outlet. The high pressure relief valve includes a closure and a nozzle. The closure has an opening and a locking notch defined by a circumferential wall. The nozzle has a base portion that is received within the opening and has a rim extending between a first surface and a second surface. The nozzle has a tab extending from the rim that is received within the locking notch.

Abstract: A front pull piercing valve assembly attached to a flexible container, whereby; when the wall of the flexible container is pulled into contact with a piercing element in the assembly, the contents of the container are dispensed by piercing the wall of the container and liquid flows through the valve assembly and directly into a container or through flexible hose or another connection to be dispensed. The valve assembly is configured in such a manner that during use it is filed with the liquid being dispensed thereby preventing the liquid in the flexible container from being exposed to air, namely, oxygen that often causes spoilage of certain liquids, such as wine.

Abstract: The present invention is directed to a method of salvaging an elongated oil well tubular that extends downwardly from an oil well platform as well as a saw apparatus of improved configuration. The method includes supporting the tubular in a generally upright or vertical position. A cutting apparatus is placed next to the tubular. The cutting apparatus includes a frame that supports a lifting device and a rotary cutter. The lifting device moves the rotary cutter from a first position to a second position that is higher than the first position. The second position is closer to the tubular than the first position. The rotary cutter can travel in an arcuate path when moving from the first position to the second position. The cutter moves along a selected path to cut the tubular. After cutting, the cut section is removed and the tubular then elevated so that an additional cut can be made. This procedure is repeated multiple times until the tubular has been salvaged, cut into many smaller pieces or sections.

Abstract: Assembly comprising:—a beverage dispensing line (20) defining at a dispensing end (46) thereof an inner circular flow area having a first diameter;—an upstream valve part (26) connected to said dispensing end, the upstream part having an outwardly oriented snap lock member (44);—a flexible downstream valve part (28) defining a beverage outlet at its downstream end, having an inwardly oriented snap lock member cooperating with the outwardly oriented snap lock member, the downstream valve part including a cylindrical plug (36) and defining a passage from the dispensing end past the plug to the beverage outlet, the plug defining a downstream section defining a second diameter larger than the first diameter, and defining an upstream section defining a third diameter equal to or smaller than the first diameter, connected to the downstream section, a tap handle (14) operating the downstream valve part between a dispensing position, an intermediate non-dispensing position and a final non-dispensing position.

Abstract: A package including a fitment for dispensing a liquid from a flexible bag is disclosed. The fitment is secured to the bag and includes a compressible bulb and a piercing member that are coupled together. The fitment is configured such that when the bulb is first actuated, e.g., pressed, it causes the piercing member to pierce through the wall of the bag so that the contents of the bag can be dispensed through an outlet port of the fitment. In one embodiment of the fitment a portion of the piercing member is permanently located within the bag after first use and a valve is provided to open and close the outlet port thereafter. In another and more preferred embodiment the piercing member is extended into and out of the bag to dispense the contents of the bag through the outlet port, without necessitating use of a separate valve to open and close that port.

Abstract: A method and apparatus for tapping into a pressurized multiple strings of coaxially situated tubulars for wells and/or platforms which have overturned wherein the tapping occurs underwater via a diver or remotely operated vehicle. The assembly includes a tapping tool connectable to the tubular via a saddle connection and an adjustable tapping clamp with adjustable support/locking feet, compression plate with view ports, and angularly adjustable hot tapping system, along with a drill/saw system.

Abstract: A device for cutting and plugging underwater pipes, the device includes a frame with one or more clamps for securing the device to the pipe. Attached to the frame is an arm having a first end and a second end. The first end is attached to an actuation element that in combination with a support bar can pivot and extend the arm. A motor is attached to the second end of the arm. A saw blade and pipe plug is concentrically mounted to the motor. The motor powers the saw blade to cut the pipe transversely. The arm then positions the pipe plug concentric with the cut pipe, and in combination with rotation of the motor, plugs the cut pipe with the pipe plug.

Abstract: An irrigation system comprises one or more waterlines coupled to one or more watering mechanisms for watering one or more areas. The watering mechanisms are fixed in place at the desired area by an adapter which removably couples the one or more watering systems in place. Water is supplied to each of the one or more watering mechanisms by traveling from the one or more waterlines and through one or more pressure compensators. The one or more pressure compensators regulate the water flow through the one or more watering mechanisms enabling the irrigation system to uniformly distribute water at a set and constant pressure value. The water is distributed by one or more valves which are used to control one or more zones of the irrigation system. In some embodiments, a controller controls the system based upon a signal received from one or more sensors of the system.

Abstract: A bonnet is pressed and fixed to a valve body using a pressing means of an attachment fixed to the valve body, and also a coupling means is released from coupling, and a work housing is attached to the attachment, the pressing means is released from pressing and fixing, the bonnet is taken out to an inside of a storage space of the work housing and is removed, and thereafter a short pipe that has an inner plug is attached to the valve body, the short pipe is pressed and fixed to the valve body using the pressing means of the attachment, the work housing is removed from the attachment, the short pipe and the valve body are coupled and fixed to each other in a sealed state using a second coupling means, and the attachment is removed from the valve body.

Abstract: A clamp for repair of a pipe coupling, includes a clamp unit including a side wall with an inner surface, the inner surface having a curvature dimensioned to match an outer curvature of a pipe coupling to be repaired. A coupling on the clamp unit is constructed and arranged to couple a first portion of the clamp unit with a second portion of the clamp unit. The coupling, when secured, operates to induce a radially inward force on the inner surface of the clamp unit. A window is formed as an opening in the side wall of the clamp unit. The window is dimensioned to expose a flange of a pipe coupling to be repaired.

Abstract: In a snap tap forming method, a partition wall formed along a curvature of a water pipe outer peripheral wall surface is brought into hermetical pressure contact with the water pipe outer peripheral wall and is mounted on the outer peripheral wall at a position corresponding to an inflow opening portion of a gate valve and at which a snap tap of the water pipe is formed. A center drill guide small hole aligned with the snap tap axis is drilled in a center portion of partition wall. A drilling machine inserted in a water flow sleeve of the gate valve is inserted into the aforementioned small hole. A water diverting port is formed in the partition wall and a peripheral wall of the water pipe using a core drill by advancing the drilling machine while estimating a drilling center. Then the drilling machine is removed from a water flow passage in the gate valve, and the snap tap is connected to the water diverting port by a snap tap attaching tool.

Abstract: A snap fitting for use in plumbing is provided. The snap fitting includes a main body formed of plastic and shaped to extend partially around a cylindrical pipe to snap over the pipe and an inset for extending from an interior side of the main body into a hole in the cylindrical pipe.

Abstract: A process fluid pressure sensor assembly includes a pressure sensor configured to sense a pressure of a process fluid. The assembly includes a pressure sensor body formed of an insulating material. The pressure sensor includes a plurality of electrical contact pads which couple to a pressure sensing element of the body of the pressure sensor. An interconnect body is configured to fit over an end of the pressure sensor body. A plurality of electrical connectors carried in the interconnect body are in electrical contact with the plurality of electrical contact pads. A wiring harness attaches to the interconnect body and includes a plurality of wires which are electrically connected to the plurality of electrical connectors.

Abstract: A liquid level meter includes: an exterior portion having an internal space which a liquid to be measured flows in; and a pressure sensitive portion provided inside the exterior portion and having a pressure sensitive surface; wherein the exterior has holes that it is arranged on each of a vertically lower side and a vertically upper side relative to the pressure sensitive surface, and the holes connect an inside and outside of the internal space.

Abstract: A fitting for a pipe generally includes a saddle for coupling the fitting to the pipe and a tap for establishing fluid communication between the fitting and the pipe. The saddle defines a channel extending generally longitudinally through the saddle, and the channel is free of threads. And, the tap is configured to couple to the saddle within the channel of the saddle. A press for installing the fitting to the pipe generally includes a housing configured to releasably couple to the fitting, and a spike configured to releasably couple to the housing and extend at least partly through the fitting for piercing the pipe to thereby allow at least part of the fitting to be inserted into the pipe through the piercing in the pipe to thereby establishing fluid communication between the fitting and the pipe.

Abstract: A pressure measurement assembly is provided. The assembly includes a pressure sensor mount having an aperture therethrough. A pressure sensor passes through and is mounted to the aperture. The pressure sensor has an electrical characteristic that varies with applied pressure. An isolator plug is configured to be exposed to a process fluid. The isolator plug has an isolation diaphragm disposed to contact the process fluid. A passageway is fluidically coupled to the isolation diaphragm to convey process fluid pressure from the isolation diaphragm to the pressure sensor through an incompressible fluid. The pressure sensor mount is coupled to the isolator plug and has a non-circular shape when viewed along an axis of the aperture.

Abstract: A non-return valve for an oil return in the crankcase ventilation system of a combustion engine includes a valve housing, a valve body which is mounted in the valve housing so as to be displaceable as a whole between an open position and a closed position, wherein the valve body in the non-operating state of the combustion engine is maintained in the open position without preload and the valve body is configured to automatically move to the closed position in case of an overpressure at the crankcase side with respect to the oil separator chamber. The non-return valve is provided and configured to be inserted into a mounting of a cylinder head cover of the combustion engine.

Abstract: A door latch assembly of a vehicle includes an outer handle lever connected to a door outside handle. An opening lever is configured to pivot in a door opening direction when the outer handle lever pivots. A pawl lever is coaxially connected to the opening lever and configured to pivot with the opening lever in the door opening direction in a door unlocked state. A door locking and unlocking device is configured to pivot the opening lever and the pawl lever in the door unlocked state in the door opening direction. A claw lever is restricted by the pawl lever to lock a striker when the door is locked and is released from the pawl lever to release the striker when the door is opened.

Abstract: A remote seal assembly for subsea applications is provided. The assembly includes an upper housing having a fluid coupling for coupling the remote seal to a process fluid pressure measurement device. A lower housing is coupled to the upper housing and has an interface that is configured to mount to a pressure vessel. The lower housing also has a process fluid inlet. An isolation diaphragm is disposed between the upper and lower housings. At least one of the upper housing, lower housing and isolation diaphragm are constructed from a material suitable for immersion in saltwater. In some embodiments, the lower housing has a shoulder disposed about the process fluid inlet and a plurality of self-energizing seals configured to couple the assembly to a venturi flow meter body. A subsea process fluid flow measurement system is also provided that includes a pressure transmitter and at least one subsea remote seal assembly.

Abstract: In some implementations, an injection system that injects sealant into a pipe, pressure component or valve while containing the pipe, pressure component or valve repair that significantly reduces or eliminates release of hazardous material from inside the pipe, pressure component valve or injection system and thus significantly reduces emission of the hazardous material from inside the pipe, pressure component or valve into the environment and protecting the repair technicians.

Abstract: A rotating gate valve can be used to shear cables or tubing as it closes to obstruct flow. In embodiments, a valve body can have a flow passage and a lateral bore that is transverse to the flow passage. The gate can have a generally cylindrical shape and can rotate about the axis of the gate as it moves laterally to close a flow passage. The lateral and rotational movement can shear articles such as, for example, cables and tubing that extend through the flow passage.

Abstract: In some implementations, an injection system that injects sealant into a pipe, pressure component or valve while containing the pipe, pressure component or valve repair that significantly reduces or eliminates release of hazardous material from inside the pipe, pressure component valve or injection system and thus significantly reduces emission of the hazardous material from inside the pipe, pressure component or valve into the environment and protecting the repair technicians.

Abstract: In some implementations, an injection system that injects sealant into a pipe, pressure component or valve while containing the pipe, pressure component or valve repair that significantly reduces or eliminates release of hazardous material from inside the pipe, pressure component valve or injection system and thus significantly reduces emission of the hazardous material from inside the pipe, pressure component or valve into the environment and protecting the repair technicians.

Abstract: In some implementations, an injection system that injects sealant into a pipe, pressure component or valve while containing the pipe, pressure component or valve repair that significantly reduces or eliminates release of hazardous material from inside the pipe, pressure component valve or injection system and thus significantly reduces emission of the hazardous material from inside the pipe, pressure component or valve into the environment and protecting the repair technicians.

Abstract: A valve device and assembly procedure thereof on a in-service pipeline by mounting an assembly that includes an operative subset, a deposit subset, and lateral sets which are assembled on a pipeline so that, without shutting down the pipeline service, the pipeline is perforated, and valve seats, included with the valve device, are displaced until the device is in-service, thus arranging the valve device to enable the control of the fluid circulation through the pipeline.

Abstract: The invention relates to a maintenance device for maintaining an elongated and in particular tubular hollow body (2), which is designed to conduct a fluid, having a sealing device (4) comprising a function unit (12), said sealing device being provided for sealing a working area (9) with respect to surroundings of the hollow body (2) and being movable in a direction along a surface of the hollow body (2), wherein the sealing device (4) comprising the function unit (12) can be moved at least partially in the longitudinal direction (B) of the hollow body (2), relative to the surface (7) of same, while preserving a tight seal. In addition, a method for forming a maintenance access on an elongated and in particular tubular hollow body is claimed.