Abstract: A rotary tube kiln, with a rotatably mounted rotary tube, which has a motorized drive, a mounting, a material inlet and a material outlet, wherein the interior space of the rotary tube has a process space, the inside atmosphere of which is separate from the outside atmosphere. The process space is sealed off from a pressure space by means of a first seal and the pressure space is sealed off from the outside atmosphere by means of a second seal and, by means of a pressing device, a first pressing force can be applied to the first seal and a second pressing force can be applied to the second seal, the first pressing force can be set independently of the second pressing force and, during operation, the internal pressure of the pressure space is higher than the internal pressure of the process space.

Abstract: The invention relates to a gas-lubricated mechanical seal arrangement (1) comprising a first mechanical seal (2) having a first rotating slide ring (21) and a first slide ring (22) defining a first sealing gap (23) between sealing surfaces (21a, 22a), the first slide ring (22) having a passageway (25) for supplying a barrier fluid to the first sealing gap (23), wherein the passageway (25) extends from a rear surface (22b) to the sliding surface (22a) of the first stationary slide ring (22), and wherein on the first rotating slide ring (21) a first secondary seal (4) for sealing and a centering device (5) for centering of the first rotating slide ring (21) are arranged.

Abstract: A sealing arrangement is disclosed. In one example, the sealing arrangement includes a composite seal ring that includes a seal ring shell and a seal insert, an outer housing, at least one spring, and a welded bellows. The welded bellows can have a fixed end and an opposite free end. The fixed end can be welded to one of the seal ring shell and the outer housing, and the free end can make a non-welded contact seal with the other one of the seal ring shell and the outer housing.

Abstract: A bearing isolator capable of operating under flooded conditions is disclosed. The bearing isolator can include a stator, a rotor, a unitizing element and a sealing element, the stator and rotor form a cavity in which the unitizing element is disposed, and features of the unitizing element with features of the stator and rotor to ensure the stator and rotor stay together while still maintaining a gap between the two components to avoid metal on metal contact. The sealing element resides against a surface of the stator and includes a radially-inward extending lip seal that rides against a running surface of the rotor for improved sealing.

Abstract: A controllable mechanical seal for sealing a shaft rotatable relative to a housing of a device which manipulates a fluid, the seal including: (i) a first face element having a first face surface, wherein the first face element is adapted to rotate with the shaft; (ii) a second face element having a second face surface, wherein the second face element is adapted to be supported within the housing; wherein the first face surface and the second face surface define a gap between the surfaces, physical dimensions of the gap contributing to defining a leakage rate of the fluid through the gap; wherein at least one of the first face element or the second face element includes at least one cavity wholly contained within the face element, the at least one cavity adapted to contain a hydraulic fluid; and wherein the at least one cavity is in fluid communication with at least one hydraulic intensifier and at least one pressure control valve, the at least one hydraulic intensifier being in pressure communication with a s

Abstract: A seal structure can include a protruding portion of an outer surface of a body. An inner surface of the protruding portion may define at least a portion of a channel. The protruding portion may be configured to engage and at least partially deform into the channel in response to a load generated by pressing an outer surface of the protruding portion against a contact surface of a contact member to provide a seal between the body and the contact member. The seal structure may be integrally formed within the body as a monolithic object. The body may face towards the contact surface of the contact member during operation of the seal structure. A method may include forming a monolithic body with an integral seal structure by additively fusing material so that the body has an outer surface facing towards a contact surface of a contact member.

Abstract: A submersible well pump assembly has a motor that rotates a drive shaft within the pump. The pump has a number of pump stages, each stage having a diffuser and an impeller. A bushing is fixed for non-rotation within the diffuser. A thrust runner sleeve mounted to the drive shaft has an outer diameter surface in sliding rotating engagement with an inner diameter surface of the bushing. At least one seal ring is mounted to the sleeve in sealing engagement with the drive shaft to block the entry of well fluid particulates between the sleeve and the drive shaft.

Abstract: A seal section for use in a downhole submersible pumping system includes one or more fluid separation mechanisms, a shaft and one or more primary mechanical seals. Each of the one or more primary mechanical seals is disposed along the shaft. The seal section also includes one or more redundant shaft seals that each substantially surrounds a corresponding one of the one or more primary mechanical seals. In another aspect, a seal section for use in a pumping system includes one or more fluid separation mechanisms, a shaft, a primary mechanical seal and a redundant shaft seal. The redundant shaft seal substantially surrounds the primary mechanical seal. The seal section further includes an internal seal chamber defined by the annular space between the primary mechanical seal and the redundant shaft seal.

Abstract: A dust seal includes an annular dust seal body, an annular bushing through which a shaft is slidably inserted, and an annular seal lip provided on the bushing and slidably contacting the shaft. The dust seal body includes an annular elastic attaching portion that is fitted into an opening of a receiving portion, an annular first accordion unit having an elastic accordion, and an annular second accordion unit having an elastic accordion. The first accordion unit and the second accordion unit are arranged side by side in the direction of an axis. The first accordion unit is integral with the attaching portion, is joined to the attaching portion at an outer periphery, and is bonded to the bushing at an inner periphery by vulcanization. The second accordion unit is fixed to the attaching portion at an outer periphery, and engaged with the bushing at an inner periphery.

Abstract: A seal protection system includes a housing located on a dry side of a seal and adjacent to the frame of a pump. The housing, in part, defines a cooling chamber adjacent to the seal in which a cooling liquid may be circulated. The cooling liquid may be contained within the chamber or within a reservoir removed from the chamber. The cooling liquid circulates within the chamber to keep the seal cool even if the pump is operating under dry conditions.

Abstract: A mechanical seal has a stationary face and rotating assembly adjacent to the stationary face. The rotating assembly includes an upper bellows ring, a lower bellows ring and a runner between the lower bellows ring and the stationary face. A bellows extends between the upper bellows ring and the lower bellows ring. In preferred embodiments, the bellows is constructed from a perfluoroalkoxy polymer and is secured within the upper bellows ring and the lower bellows ring by a selected locking mechanism. The locking mechanism may include the use of crimp rings configured for a press fit engagement within the upper and lower bellows rings. Alternatively, the locking mechanism may employ locking rings configured for threaded engagement with the upper and lower bellows rings.

Abstract: A mechanical seal having a seal cover capable of being installed on the outer surface around the circumferential surface of a hole of a seal housing and having an inner circumferential surface surrounding a shaft; a bellows having a first installation portion and a second installation portion, the first installation portion being formed by sealingly fitting the inner circumferential surface of the seal cover to one end circumferential surface of the bellows, the seconds installation portion being at the other end circumferential surface of the bellows, the first installation portion and the second installation portion forming a tubular portion between the portions, the tubular portion being formed as an elastic means surrounding the shaft; a stationary sealing ring sealingly installed on the circumferential surface of the second installation/portion and having an annular sealing surface pressed by the elastic means of the bellows; a rotating sealing ring having an annular relative sealing surface facing the s

Abstract: A chemical liquid supplying apparatus can discharge chemical liquid with high accuracy and monitor a leakage of an incompressible medium from a region between a piston and a cylinder. A pump has a flexible tube for partitioning a pump chamber and a drive chamber, and the incompressible medium is supplied to the drive chamber by the piston reciprocating in a cylinder hole of the cylinder. A bellows cover is provided between the piston and the cylinder, and forms a seal chamber contiguous to a sliding face of the piston. A seal-chamber pressure sensor is attached to the cylinder so as to detect the pressure of the incompressible medium for sealing enclosed in the seal chamber, and a deterioration degree of a seal member is determined by detecting the pressure in the seal chamber.

Abstract: A bearing isolator seal is used to seal the space between the housing and the rotating shaft to prevent contaminants such as abrasive particles, moisture, and corrosive media from entering the bearing. The preferred embodiment consists of a stationary retainer ring with a groove for an O-ring adjacent to a bearing housing, a rotating mating ring with a groove for a second O-ring adjacent to a rotating shaft, and a floating ring made of a material with a low coefficient of friction and a low elastic modulus. The cross-section of the floating ring can be Z-shaped, U-shaped, or V-shaped. A C-shaped locking ring is used as an aid to assemble the aforementioned seal components into a module and is subsequently removed after the seal is installed. Contaminants are stopped at both ends of the floating ring as well as at the O-rings by their spring action. The seal is also designed to release pressure built up in the bearing lubricating system.

Abstract: A mechanical composite seal assembly for providing a seal between a rotating shaft and a static surface. The mechanical composite seal assembly includes first and second axially adjacent annular seal elements. The first and second seal elements each include a sealing edge contacting the shaft to provide a respective seal between the first and second seal element and the shaft. A static housing receives the first and second seal elements and engages the static surface to provide a static stationary seal, while concomitantly providing a flex region that engages the seal elements to form a dynamic seal therewith.

Abstract: A primary technical goal of the present invention is to provide a mechanical seal device in which a manufacturing cost of the parts is decreased, a satisfactory seal performance is exhibited even under severe operating conditions, and the device can be easily mounted outside relative to the housing.

Abstract: A mechanical end face seal comprising two relatively rotatable seal rings, a resilient bellows for providing a secondary seal between one seal ring and either a housing or a rotating shaft and a finger spring element nested in the bellows. The resilient bellows comprises an elastomeric material, such as molded rubber, and has a single convolution having a general cross-sectional shape of an inverted “Omega.” The finger spring member comprises a plurality of generally “U” shaped spring fingers which provide the axial biasing force to urge the ring faces in sealing relation. In a preferred embodiment, the spring includes ferrules for providing radially inward force on a flange portion of each end of the bellows to maintain the secondary seal.

Abstract: The ready-to-mount axial face seal comprises a rotating unit of a shaft protection sleeve pushable over the pump shaft with a longitudinal section projecting out of the housing of the pump and fastenable to this shaft, with a spring-loaded axial face seal ring surrounding the shaft protection housing and with an elastic sealing ring in the shaft protection sleeve as well as a stationary unit, surrounding the shaft protection sleeve, of a counter ring on which the axial face seal ring bears and of an assembly part for fastening the axial face seal on the pump housing. In relation to the diameter of the pump shaft the wall thickness of the shaft protection sleeve is smaller than with the known shaft protection sleeve. Furthermore the outer diameter of the axial face seal ring and of the counter ring in relation to the same diameter of the pump shaft is an associated standard diameter of an axial face seal without shaft protection sleeve.

Abstract: The mechanical seal (3) includes: a rotary side sliding ring (32) which is supported by the large diameter side outer circumferential face (23) of the annular step section (21) of the rotary shaft (2) via the rotary side O-ring (37) and press-fitted into the annular step section (21) by gas pressure in the device; and an unturnable stationary side sliding ring (31) which is fixed onto the seal housing (1) side via the stationary side O-ring (33) being capable of moving in the axial direction and being able to come into close contact with the sliding protrusion (323) of the rotary side sliding ring (32) due to the spring (36) so that the airtightly sealed sliding face S is formed. The rotary side sliding ring (32) is made of self-lubrication sliding material, and the stationary side sliding ring (31) is made of sliding material, the Young's modulus of which is higher than that of the self-lubrication sliding material.

Abstract: A sealing configuration is provided for sealing off a first region from a second region through which a fluid can flow and which can be kept at different pressures. The sealing configuration has a deformation region and a sealing surface connected thereto. The sealing surface is spaced apart from an opposing surface by a sealing gap. The width of the sealing gap depends on a deformation of the deformation region as a result of a differential pressure. The sealing configuration preferably serves to seal off a turbine shaft from a turbine casing or a moving blade from a turbine casing.

Abstract: A mechanical end face seal comprising two relatively rotatable seal rings, a resilient bellows for providing a secondary seal between one seal ring and either a housing or a rotating shaft and a finger spring element nested in the bellows. The resilient bellows comprises an elastomeric material, such as molded rubber, and has a single convolution having a general cross-sectional shape of an inverted “Omega.” The finger spring member comprises a plurality of generally “U” shaped spring fingers which provide the axial biasing force to urge the ring faces in sealing relation. In a preferred embodiment, the spring includes ferrules for providing radially inward force on a flange portion of each end of the bellows to maintain the secondary seal.

Abstract: A vacuum packing configuration and installation for use therewith, has a first part and a second part. The first part includes a hydraulically or pneumatically expandable, medium-tight volume adapted to be acted upon by an hydraulic or pneumatic medium, with a wall facing the second part and forming sealing faces fastened on the first part. The wall is a resilient metal diaphragm.

Abstract: A vacuum cleaner is provided having a tank with an inlet for receiving liquid material and defining an interior. An air impeller housing has an opening in air flow communication with the tank interior, and an air impeller is disposed inside the air impeller housing. A motor is disposed inside a motor housing and operatively coupled to the air impeller, and a switch is provided having a first position in which power is provided to the motor and a second position in which power to the motor is interrupted. A float is disposed in the tank and a float rod extends between the tank and the switch, the float rod being capable of moving the switch from the first position to the second position. A seal is positioned intermediately along the float rod to create a water-tight barrier between opposite ends of the float rod.

Abstract: A seal head assembly includes a case. A ferrule is seated against the case. A spring is seated at one end against the ferrule. A spring seat receives a second end of the spring. The retainer ring has a band and a plurality of tabs, wherein the band engages the spring seat. A metal bellows has a first end in contact with the case and a second end having a contact surface for the tabs of the retainer ring. A seal washer has an annular groove, wherein the seal washer is received in the second end of the metal bellows. A seal is received in the annular groove of the seal washer.

Abstract: A sealing device for maintaining a vacuum seal about a mechanism that passes through a port of a process chamber. At least a portion of the sealing device is sealingly engaged with the mechanism, such as a shaft, and the sealing device may allow the mechanism to be offset relative to the port in at least one degree of freedom. The mechanism may also be moved slidingly and/or rotationally relative to the portion of the sealing device engaged with the mechanism. The sealing device may include a flexible member that allows independent movement of the mechanism while sealing engagement with the mechanism is maintained.

Abstract: A mechanical end face seal comprising two relatively rotatable seal rings, a resilient bellows for providing a secondary seal between one seal ring and either a housing or a rotating shaft and a finger spring element nested in the bellows. The resilient bellows comprises an elastomeric material, such as molded rubber, and has a single convolution having a general cross-sectional shape of an inverted “Omega.” The finger spring member comprises a plurality of generally “U” shaped spring fingers which provide the axial biasing force to urge the ring faces in sealing relation. In a preferred embodiment, the spring includes ferrules for providing radially inward force on a flange portion of each end of the bellows to maintain the secondary seal.

Abstract: A sealing element for a face seal assembly including a bellows portion having mounting portions at its axial ends. One of the mounting portions is designed for non-rotational mounting on a component, e.g. a shaft, and the other for retaining an annular face member. The sealing element is formed, on at least the faces thereof exposed to a medium to be sealed, from a plastics material selected from a group of plastics materials comprising PEEK and ECTFE. The sealing element serves for applying a bias force to the annular face member. The sealing element enables the design of an uncomplicated, easily maintained, externally pressurised single action face seal assembly which is particularly suitable for sealing aggressive media.

Abstract: A mechanical seal including a slide ring and a counter-ring that are axially preloaded against each other along sealing surfaces through the application of spring tension. These surfaces contact each other in a manner that permits the sealing surfaces to rotate relative to each other. The slide ring and a housing, which is arranged in a rotatably fixed manner relative to slide ring, are each sealingly allocated to one end face of a bellows extending in the axial direction. One of the end faces of bellows is allocated nonadherently, with force-locking and/or form-locking, to slide ring, and the other end face of bellows is allocated nonadherently, with force-locking and/or form-locking, to housing.

Abstract: A vacuum packing configuration and installation for use therewith, has a first part and a second part. The first part includes a hydraulically or pneumatically expandable, medium-tight volume adapted to be acted upon by an hydraulic or pneumatic medium, with a wall facing the second part and forming sealing faces fastened on the first part. The wall is a resilient metal diaphragm.

Abstract: A vacuum packing configuration and installation for use therewith, has a first part and a second part. The first part includes a hydraulically or pneumatically expandable, medium-tight volume adapted to be acted upon by an hydraulic or pneumatic medium, with a wall facing the second part and forming sealing faces fastened on the first part. The wall is a resilient metal diaphragm.

Abstract: A seal for sealing a low pressure area from a high pressure area for containing a process fluid. The high pressure area is located along a rotatable shaft extending from a machine body. The seal includes an outboard seal positioned along the shaft and an inboard seal axially spaced along the shaft from the outboard seal to define an annular chamber between the inboard seal and the outboard seal for containing a buffer fluid. The inboard seal includes a stationary assembly attached to the machine body and having a stationary seal ring with a stationary sealing face. The inboard seal also includes a rotating assembly attached to the shaft. The rotating assembly includes a rotating seal ring having a rotating sealing face in sealing relation with the stationary sealing face.

Abstract: An improved gas seal having inboard and outboard seal units each defined by a pair of opposed and relatively rotatable seal faces, one face of each pair having appropriate grooves which communicate with a pressurized barrier gas, preferably an inert gas such as nitrogen. The inboard seal unit, at its other seal periphery, communicates with a process fluid being handled by a rotating equipment, namely a pump. Each seal unit has one of the seal rings, the nonrotating ring in the preferred embodiment, urged axially toward its opposed ring by a compact bellows which axially cooperates between the respective seal ring and a backing member. The bellows is positioned to create an isolation between the barrier and process fluids and to provide an effective diameter to provide desirable balance of pressures as imposed on the axially moving seal ring to optimize seal performance.

Abstract: A rotor for collecting and centrifuging biological fluids in a range of volumes. The rotor includes an elastic impermeable diaphragm which defines at least a portion of a variable-volume processing chamber, where the fluid is centrifuged. The rotor includes a rigid mounting member, to which the diaphragm is mounted and which is held and spun by a chuck. Preferably, this rigid mounting member includes a boundary wall which together with the elastic diaphragm defines the chamber. The boundary wall may be a substantially imperforate circular wall which extends to the periphery of the processing chamber but defining one opening, preferably near the axis of rotation, permitting a conduit or conduits to pass therethrough so as to be in fluid communication with the processing chamber. The rotor may include a separate structure for controlling the flow of liquid out of the chamber into the conduit.

Abstract: A balanced, de-coupled seal assembly for use in a bellows seal having a mating rotating seal assembly, wherein the seal is used for sealing a process fluid along a rotatable shaft extending from a machine body. The seal assembly includes a seal ring, a seal ring shell mating with and de-coupled from the seal ring, and a flexible O-ring between the seal ring and the seal ring shell. The O-ring is provided at a location so to balance the seal ring and seal ring shell under both normal and reverse pressure conditions and to prevent the process fluid from leaking between the seal ring and the seal ring shell.

Abstract: A seal for sealing a low pressure area from a high pressure area for containing a process fluid. The high pressure area is located along a rotatable shaft extending from a machine body. The seal includes an outboard seal positioned along the shaft, and an inboard seal axially spaced along the shaft from the outboard seal. An annular chamber is defined between the inboard seal and the outboard seal for containing a buffer fluid. The inboard seal includes a stationary assembly attached to the machine body. The stationary assembly includes a stationary seal ring having a stationary sealing face, and a first secondary seal between the stationary seal ring and the housing. The inboard seal further includes a rotating assembly attached to the shaft. The rotating assembly includes a rotating seal ring having a rotating sealing face in sealing relation with the stationary sealing face and a second secondary seal between the rotating seal ring and the shaft.