Abstract: A connector for forming a fluid flow pathway by connection with a reciprocal connector. Both the connector and reciprocal connector include a fluid flow blockage part sheathed within an axially compressible sheath part. A first bearing surface receives an urging force to retract the blockage part axially along the sheath part. A terminal end of the sheath part defines a second bearing surface containing a fluid flow opening with the fluid flow blockage part retractably therein. A first chassis part includes a first catch part. A second chassis part includes a second catch part and a third bearing surface spaced from the second catch part along the second chassis part. Retraction of the blockage part forms a fluid flow pathway not sooner than immediately when the openings meet to allow fluid transfer the openings avoiding fluid leakage between connected connectors.

Abstract: A valve having a streamlined fluid flow space is disclosed. The valve includes a main body and an opening-closing member, a fluid flow space through which fluid flows is formed inside the main body, the opening-closing member opens or closes flow of the fluid. Here, the fluid flow space has a streamlined shape from an inlet in a direction from the inlet to the opening-closing member or from an outlet in a direction from the outlet to the opening-closing member.

Abstract: A three dimensional integrated circuit (3D-IC) module socket system includes an integrated Fan-Out (InFO) adapter having one or more integrated passive devices (IPDs) embedded in the InFO adapter. The InFO adapter is also integrated into the 3D-IC module socket system by stacking the InFO adapter between a socket and a SoW package. The InFO adapter with embedded IPDs allows for more planar area of the SoW package to be available for interfacing the socket and provides a short distance between the embedded IPDs and computing dies of the SoW package which enhances a power distribution network (PDN) performance and improves current handling of the 3D-IC module socket system.

Abstract: A sound generation assembly unit, for an exhaust system of an internal combustion engine, includes a sound generation module (16) with a sound generation module housing to be arranged at an exhaust gas guide element (12) of the exhaust system (14). At least one loudspeaker unit (20) is arranged in the sound generation module housing (18). A rear volume module (30) includes a rear volume module housing (32) and a rear volume (34) formed in the rear volume module housing (32). The rear volume module housing (32) is connected or can be connected to the sound generation module housing (18) for the acoustic coupling of the rear volume (34) to the at least one loudspeaker unit (20).

Abstract: A system of jointing reinforced thermosetting resin (RTR) pipe, including: a first RTR pipe with a spigot portion, the spigot portion having a first joining surface; a second RTR pipe with a socket portion shaped to receive the spigot portion, the socket portion having a second joining surface; and a cavity between the first joining surface and the second joining surface, the cavity formed when the spigot portion is push-fit into the socket portion; and an injectable/curable material located in the cavity. Additionally, a method of jointing RTR pipe, including the steps of: push-fitting a spigot portion of a first pipe into a socket portion of a second pipe, forming a cavity between the spigot portion and the socket portion; injecting a joining compound into the cavity; and curing the joining compound.

Abstract: A low point raceway fitting for draining accumulated condensation from electrical raceway systems installed in industrial, commercial and residential facilities. The drain fitting is a tubular member having a throughbore for pulling wire, connecting ends for installation in a raceway system, and an enlarged section between the ends profiled for engagement by a tool for installation. A drain passage is formed radially through the tool engaging member section and is positioned at the underside of the horizontal fitting for gravity drainage. A screen insert can be placed in the drain passage to keep dirt and insects out.

Abstract: A fitting includes first and second fitting components adapted to be joined on a conduit to a first relative axial position to effect a seal between the conduit and a sealing element, sealing the conduit from a non-wetted fitting interior volume at least partially defined by the first and second fitting components. When the first and second fitting components are joined to the first relative axial position, first and second annular surfaces of the fitting axially engage, resulting in resistance to additional axial stroke of the first and second fitting components. At least one of the first and second annular surfaces includes a recess extending from an inner diameter to an outer diameter of the corresponding annular surface, and defining a leak detection port in fluid communication with the fitting interior volume when the first annular surface is in engagement with the second annular surface.

Abstract: A rotary union includes a housing forming a bore and a piston bore having an open end and disposed at a radially offset distance with respect to the bore. The piston bore is fluidly isolated from the bore. A seal carrier is slidably disposed within the bore, and includes an actuation arm extending radially outwardly relative to the bore such that it overlaps the piston bore. A piston slidably disposed in the piston bore is extendible to releasably abut the actuation arm and urge the seal carrier to displace relative to the bore when the piston displaces relative to the piston bore.

Abstract: A pipe assembly includes two pipes connected together by a joining device and a drainage system, the drainage system includes a drainage slot created in the joining device, two annular seals arranged on either side of the drainage slot over the entire periphery around a pipe, and a drainage element configured to send fluid present in the drainage slot from a first end entering the drainage slot to the other end of said drainage element.

Abstract: A low point raceway fitting for draining accumulated condensation from electrical raceway systems installed in industrial, commercial and residential facilities. The drain fitting is a tubular member having a throughbore for pulling wire, connecting ends for installation in a raceway system, and an enlarged section between the ends profiled for engagement by a tool for installation. A drain passage is formed radially through the tool engaging section and is positioned at the underside of the horizontal fitting for gravity drainage. A screen insert can be placed in the drain passage to keep dirt and insects out.

Abstract: A connector assembly includes first and second mating connectors that can be joined to make a fluid connection. The connectors are constructed to discriminate improper connectors so that no fluid tight connection can be formed with improper connectors. The connector assembly can be used with a system for compression therapy to prevent deep vein thrombosis. The first connector includes a bleed passage.

Abstract: Duct fittings can be formed or assembled from two or more components including a collar and a clamp. The clamp and the collar can be assembled and/or mated together to form the duct fittings. The collar can have a first annular portion to which a first layer of a multilayered duct is attached or connected. The collar also can include a second annular portion that can include splines to which a second layer of the multilayered duct is attached. The splines can accommodate or form fluid passageways. The clamp can be located on top of the second layer and can include attachment mechanisms securing the clamp to a support surface.

Abstract: A magnetic flowmeter flowtube assembly includes a conduit having an inside diameter, a fluoropolymer liner disposed within and extending through the conduit, and a pair of electrodes mounted relative to the liner to measure a voltage induced within a process fluid flowing through the liner. A venting assembly provides a process fluid vent path from the inside diameter of the conduit to an exterior of the flowtube assembly.

Abstract: A fluid coupling reliably finding absence of the gasket, if exists, in the leak test is provided. Butted end surfaces of coupling members have annular sealing protrusions and anti-overfastening annular protrusions protruded further than the annular sealing protrusions, respectively. At least one of the anti-overfastening annular protrusions has a communication path communicating internal space with external space when both the anti-overfastening annular protrusions butt against each other.

Abstract: A device for connection of a line element to a component is provided. The line element ends in a connection housing or is connected to such a connection housing. A releasable fixing arrangement is configured between the connection housing and the component. A line section extending in the connection housing is heated by an electric heating wire. The heating wire externally surrounds the line section. The heated line section projects in the direction of the component so far over the region for releasable fixing of the connection housing on the component that it ends in the inner space of the component.

Abstract: An unwelded explosion-proof drain cable gland assembly includes: a gland nut that is disposed on an outer circumference of a flexible tube and has a seat protruding inward; a gland having a cylindrical compression pin part that is formed at an upper portion thereof, an annular flange that is formed integrally with the compression pin part and protruding in a radial outward direction, and a binding part that is integrally formed under the flange and is inserted into and bound to the flexible tube; a gland washer that is installed in front of the gland and comes into surface contact with an upper surface of the compression pin part; a rubber packing that is disposed in front of the gland washer and has a hollow interior; and a coupling into which the rubber packing is fitted and whose outer surface is threaded to be coupled with the gland nut.

Abstract: A coupling component is provided for a plug-in connection for media-carrying lines, and includes a flow channel that has an inner cross-section that is enlarged in steps in order to allow the formation of a reflux zone when carrying the media, and a vent opening. The step-like enlargement is asymmetrically formed over the circumference of the inner cross-section so as to achieve an improved separation capacity.

Abstract: A unique, integrated non-obvious pathway to convert biomass to biofuels using integration of chemical processes is described herein. The present invention is simple, direct, and provides for the shortest or minimum path between biomass and transportation fuels with alcohols as intermediates, while avoiding hydrogen use during processing. Furthermore, the present invention allows the manufacture of “drop-in” substitutable fuels to be used as-is without modifications instead of conventional petroleum based fuels. The processing described herein is done under mild conditions, under relatively low pressures and temperatures, and under non-corrosive conditions obviating use of special equipment or materials.

Abstract: An interchangeable fitting system generally involving a fitting, the fitting including a male connector and a female connector, the male and female connectors each having a forward portion and an aft portion, the male connector having a primary sealing structure and a secondary sealing structure, the female connector having a primary sealing structure and a secondary sealing structure, and the male primary sealing structure being interfaceable with the female primary sealing structure, and the male secondary sealing structure being interfaceable with the female secondary sealing structure.

Abstract: A connecting structure, including: a volute including an air inlet and an air outlet; and a conversion interface. A connecting part is disposed on an outer side of the air outlet. The connecting part includes: a lower plate; a lower lug protruding outward from each end of the lower plate; and an upper flange disposed above the lower plate. The conversion interface includes a sleeve. An upper plate protrudes from a rear part of the sleeve. Two upper lugs protrude outward from two ends of the upper plate, respectively. A lower flange is disposed on the rear part of the sleeve beneath the upper plate. The upper plate is disposed on the upper flange. The lower flange is disposed on a curved convex block that protrudes upward from an outer edge of the lower plate. The upper lug is disposed on the lower lug.

Abstract: A drill wrench for driving drill steels, drill bits, and bolts during drilling and bolting operations is disclosed. The drill wrench may include an internal driver for driving a drill steel. The internal driver may be inserted in an internal-drive recess defined within an end of the drill steel. When the drill wrench is rotated, the internal driver may drive the drill steel by engaging at least one surface within the end of the drill steel. The drill wrench may also include an external support member that supports the drill steel during drilling. The external support member may also drive the drill steel by engaging an outer peripheral portion of the drill steel when the drill wrench is rotated.

Abstract: A fitting for making a metal-to-metal fluid seal between a first conduit and a second conduit and corresponding first and second fluid passages. The first conduit has a generally spherical-shaped exterior surface, and the second conduit has a generally conical-shaped interior surface for receiving the generally spherical-shaped exterior surface of the first conduit. A nut is engaged with a threaded exterior surface of the second conduit, tightening of the nut on the threaded exterior surface urging the first and second conduits axially together to apply increasing pressure. A ring can be positioned between the nut and the first conduit, the ring providing a lower net coefficient of friction during tightening of the nut compared to direct contact between the nut and first conduit. The ring can be radially spaced from a radially facing interior surface of the nut.

Abstract: A device for collecting fuel leaks on the feed pipes of an interface, such as a fuel injection system for a thermal engine. Each feed pipe includes at each end a nut to secure the feed pipe in position on an interface, behind which nut is arranged a device for collecting fuel leaks. The recovery unit includes a spout and is integral with the nut and with the feed pipe in a sealing manner.

Abstract: A connector arrangement for a fluid system includes a fuel injector that defines a first fluid passage having a connector, a pipe that is engageable with the connector of the first fluid passage, preferably to form a high pressure seal, and a nut arranged to connect the pipe to the connector of the first fluid passage. A chamber is defined between the nut and the fuel injector, such chamber serving to collect leaked fluid from the first fluid passage. The fuel injector is provided with a second fluid passage having a first end in communication with the chamber and a second end in communication with a low pressure drain such that leaked fuel is provided with a drain path.

Abstract: A vented gas riser for use in a system for conducting pressurized gas through a gas carrier pipe from a gas supply source line located below ground level to a delivery point disposed above ground is provided. A fluid tight gas riser protective casing is disposed around said carrier pipe and creates a gas escape passageway in an elongate annular space between the carrier pipe and the casing. Any gas which leaks from the gas carrier pipe is captured in the gas escape passageway. A riser transition head, which includes at least one vent passageway, provides a fluid connection with said gas escape passageway and with the atmosphere such that any gas which leaks in the vicinity of the gas escape passageway can escape through the at least one vent into the atmosphere.

Abstract: A connecting mechanism for a thin stainless steel pipe and a joint includes a thin stainless steel pipe in which a chevron type projection portion is formed in an outer periphery of an end portion, a joint having an inner diameter inserting the thin stainless steel pipe and forming a male thread portion in an outer peripheral surface of an end portion, a nut having a fitting portion outwardly fitted to the thin stainless steel pipe so as to oppose to the joint on the boundary of the chevron type projection portion and having a female thread portion screwed to the male thread portion of the joint, and a packing provided between the joint and the thin stainless steel pipe wherein, a release groove is formed in a packing outer peripheral contact surface from the packing pressing surface constructing the inner side surface of the packing fitting portion of the joint to an opening end portion.

Abstract: A quick fluid connector includes two mating portions. Leakage may occur during mating and demating. In order to contain such leakage, the mating portions of the connector are mounted on the distal end of a projecting boss and at the fundus of a matching well, respectively, so that the boss and well together define a chamber which surrounds the two mating portions of the quick connector. One or more drainage channels are coupled to the chamber to carry away leakage.

Abstract: A vented gas riser for use in a system for conducting pressurized gas through a gas carrier pipe from a gas supply source line located below ground level to a delivery point disposed above ground is provided. A fluid tight gas riser protective casing is disposed around said carrier pipe and creates a gas escape passageway in an elongate annular space between the carrier pipe and the casing. Any gas which leaks from the gas carrier pipe is captured in the gas escape passageway. A riser transition head, which includes at least one vent passageway, provides a fluid connection with said gas escape passageway and with the atmosphere such that any gas which leaks in the vicinity of the gas escape passageway can escape through the at least one vent into the atmosphere.

Abstract: A vented gas riser for use in a system for conducting pressurized gas through a gas carrier pipe from a gas supply source line located below ground level to a delivery point disposed above ground is provided. A fluid tight gas riser protective casing is disposed around said carrier pipe and creates a gas escape passageway in an elongate annular space between the carrier pipe and the casing. A containment chamber is disposed below ground level which creates a confined space which has, as its only egress, a fluid connection to a gas escape passageway. Any gas which leaks into the containment chamber is directed into the gas escape passageway. A riser transition head, which includes at least one vent passageway, provides a fluid connection with said gas escape passageway and with the atmosphere such that any gas which leaks into said containment chamber is directed through the gas escape passageway and through the at least one vent and into the atmosphere.

Abstract: A threaded pipe coupling is disclosed which comprises a connection stub, a pipe, and a union nut, and in which any leakage quantities that occur can be carried away through the union nut.

Abstract: A nozzle attachment device for retrofitting fire hydrants with additional structure for reducing the potential that those with ill intent can foul municipal water supplies by introducing toxins or other materials into fire hydrants. Various embodiments include a housing with a channel and connection means for the fire hydrant's nozzle for efficient and cost effective installation, a seat and a valve within the channel which interact to close off portions of the hydrant otherwise available for receipt of toxic or other materials when the fire hydrant nozzle cap is unscrewed and open.

Abstract: A rotary union having a housing, a rotor, and a post such that a fluid can be conveyed through the rotary union. The rotor is rotatably coupled to the housing, preferably by at least one bearing interposed between a portion of the rotor exterior and a portion of the housing interior. The post is positioned in the rotary union in a manner effective to help fluidly couple the rotor to the housing and such that an annular gap surrounds at least a portion of the post such that the annular gap constitutes at least a portion of a drain fluid pathway. The present invention also includes fluid delivery systems including such rotary unions and methods of making and/or using such rotary unions.

Abstract: A coupling device for an adapter connection point, including a first fitting and a second fitting, wherein at least one of the first and the second fittings includes at least one channel, and wherein when a user begins to disengage the coupling device any trapped pressure will be relieved through the at least one channel prior to total disengagement of the coupling device.

Abstract: Method and arrangement for providing a coupling device for conduits of pressurized media which consists of (includes) at least two coupling parts (1, 2) that are possible to couple to each other in the shape of a female part and a male part which is insertable into the female part. A locking device is arranged to hold the coupling parts completely coupled in a locking position. The locking device comprises a locking member (11) positioned at one of the coupling parts (2) which in a locking position attaches into a recess (12) in the other coupling part. A sealing member (6) in the locking position achieves sealing between the coupling parts. The other coupling part (1) exhibits a further recess (16) in which the locking member can be brought to locking of the coupling parts (1, 2) in an outer locking position when the two coupling parts are coupled to each other.

Abstract: An article for connecting a fluid conduit and a fluid container includes a receptacle configured to receive the fluid conduit. The receptacle has a base defining an opening for providing communication between the container and the fluid conduit and a sealing surface at least partially surrounded by a wall extending from the base. The wall is also configured to extend about the fluid conduit.

Abstract: The present invention provides a device for optical communication comprising: a substrate for mounting an IC chip having a light emitting element and a light receiving element mounted at predetermined positions; and a multilayered printed circuit board having an optical waveguide formed at a predetermined position, which is low in connection loss among the mounted optical components and which has excellent connection reliability. The device for optical communication according to the present invention comprises the substrate for mounting an IC chip and the multilayered printed circuit board, wherein the substrate for mounting an IC chip includes conductor circuits, interlaminar insulating layers and via-holes for connecting the conductor circuits, with the interlaminar insulating layers interposed therebetween, to each other, and a light receiving element and a light emitting element are mounted on the substrate for mounting an IC chip.

Abstract: In the fabrication of semiconductor integrated circuits, a ventilation system is disclosed which includes a sleeve device, a ventilator and a sensor. The sleeve device has at least one aperture thereon for gas transfer. The ventilator is coupled to the sleeve device. The sensor is coupled to the sleeve device. A method of ventilation is also disclosed, which includes a step of sensing a relative movement between a sleeve having at least aperture for gas transfer and a gas outlet connected to a pipeline, and a step of generating a signal to control a ventilator when the relative movement between the sleeve and the gas outlet is sensed.

Abstract: A unidirectional textile reinforcing sheath capable of being taped onto a mechanical structure to be reinforced, said sheath being formed from a tape produced by the weaving of high-strength warp threads based on aramid, and having a central zone bordered by two lateral zones, the thickness of the lateral zones being less than that of the central zone.

Abstract: A fluid vent (26) for venting fluid from the annulus between the inner surface of a rigid conduit (20) and the outer surface of a conduit liner (10). The fluid vent (26) consists of a length of rigid conduit (34) containing a multiplicity of apertures (32) extending through the wall of the conduit and arranged in an annular pattern around the circumference of conduit (34). The fluid vent (26) further comprises means defining a closed annular volume (36) extending around the exterior circumference of the conduit (34) and interconnecting the outer ends of the apertures (32) with at least one fluid outlet passage (40) located on the exterior of the conduit (34) and communicating with said annular volume (36). The fluid vent can be used to expel water or other liquids from the annular space when retro-fitting a liner to a conduit, venting gas which has permeated through the lining into the annulus, or for assisting in the movement of fluid through the annulus.

Abstract: A shrouded fluid-conducting apparatus is provided that includes at least one outer conduit and at least one inner conduit disposed within the outer conduit. Preferably, the shrouded fluid-conducting apparatus further includes at least one shrouded end fitting disposed at an end of the shrouded fluid-conducting apparatus and at least one support member engaged with the inner and outer conduits. The shrouded end fitting allows the shrouded fluid-conducting apparatus to be engaged with an additional shrouded fluid-conducting apparatus. The support member allows for the transfer of loads from the inner and/or outer conduits to one or more components external to the shrouded fluid-conducting apparatus. Accordingly, the shrouded-fluid conducting apparatus may be used to transport fuel through an aircraft “ignition zone” in an FAA-compliant manner.

Abstract: A flat or sheet-like electrooptical component for sending and receiving electrical and optical signals includes a central emission region with at least one light-emitting device for sending out optical signals. A sensor region is arranged around the emission region, and at least one device for sensing optical signals is configured in the sensor region. A reflector region is arranged around the sensor region for reflecting incident electromagnetic radiation. The electrooptical component also includes a device for driving the light-emitting device based on incoming electrical signals, and a device for outputting electrical signals based on received optical signals.

Abstract: A method for controlling fluid leaks in a pipe connection. A first step involves providing a clamp having a circular clamping face with a diversion channel positioned in the circular clamping face and a drain outlet in communication with the diversion channel. A second step involves clamping the clamp around a pipe connection so that any fluids leaking from the pipe connection can only escape by being diverted to the diversion channel. A third step involves positioning a container relative to the drain outlet, so that any fluids passing through the drain outlet from the diversion channel are captured in the container.

Abstract: A pivot flow joint for high-pressure fluid-flow devices of the type including a rotating flow member connected to a non-rotating flow member. The pivot flow joint includes first and second axially-aligned seal bushings secured to the non-rotating and rotating flow members, respectively, the first and second seal bushings having opposed adjoining contact surfaces. The seal bushings are biased toward one another for sealing engagement at such contact surfaces. Certain preferred embodiments involve spring-biasing the seal bushings toward one another and/or use of the high-pressure fluid to exert axial pressure for that purpose. The two seal bushings, which are preferably ceramic and of identical size and shape, carry out the sealing function of the pivot flow joint in the transition between the non-rotating and the rotating members of such joint.

Abstract: This invention relates to a method of repairing a moisture barrier separating a paper machine dryer drum from the dryer journal. Such processes of this type, generally, involve filling the cavity between the dryer drum steam intake pipe and the dryer journal with a flowable moisture barrier material. The flowable moisture barrier seals leaks in the dryer journal moisture barrier.

Abstract: Drainage is enhanced in an orifice formed inside the internal passage of a pneumatic line by providing the orifice with first and second portions. The first portion defines a diameter that is smaller than the diameter of the internal passage, and the second portion defines a progressively increasing diameter. Generally, a first end of the second portion has a diameter that is equal to the first portion diameter, and a second end of the second portion has a diameter that is equal to the internal passage diameter.

Abstract: The invention is to provide a high pressure fuel injection pipe for a diesel engine wherein a fuel, leaked from a seat port is discharged to the outside of a head cover without leaking into the head cover so that a leakage of fuel can be promptly detected and is directed to the high pressure fuel injection pipe formed by abutting and engaging a pressure portion formed on a connecting head of a fuel injection pipe body to a pressure receiving seat portion of a counterpart member so as to provide a firm connection of the fuel injection pipe body to the counterpart member by screwing a fastening nut to press the connecting head to the counterpart member, wherein an annular washer having at least one groove or through hole formed in a radial direction on the circumference of the washer and a seal member is disposed in the vicinity of an outer end portion of a threaded engagement potion defined between the fastening nut and the counterpart member so that a fuel leaked into the inside of the fastening nut from a se

Abstract: A combination sheath and frost-resistant wall hydrant include a hydrant having a wall-penetrating conduit and intermediate wall bracket. There is an internal valve seat between the bracket and indoor or inlet end, and so is located in a presumptively warm indoor climate and spaced back from the wall and/or outdoors so as to reduce chances of freezing outdoor temperatures freezing water stopped behind the valve seat. The sheath telescopes over the hydrant's inlet end until the sheath's leading end mates against the hydrant's bracket. The leading end is vented for venting leakwater from the hydrant outdoors and not indoors in cases if the hydrant bursts by freezing because water got stopped in the conduit between the valve seat and outlet and failed to drain despite an open outlet. The sheath's trailing end seals onto the hydrant somewhere behind the valve seat.

Abstract: A clampless coupling which attaches a hose to a nipple without need of a clamp at the end of the hose to ensure sealing, including a connector and a nipple of a fluid system component. The connector is sealingly pre-connected at one end with a hose; the opposite end is in the form of a sleeve. The sleeve features a notch at its forward end, a boss on a resilient lock arm, and an O-ring seal. The nipple has a pocket depressionally formed on its outside nipple surface and an alignment tab. In operation, a user slides the sleeve over the nipple by pressing the connector toward the near end of the nipple. As the sleeve slides over the nipple, the tab is received by the notch to align the connector with the nipple, the boss drops abuttably into the pocket, and the O-ring seal sealingly compresses between the nipple and the connector. A seal assurance feature reveals improper connection when a pressure test is undertaken.

Abstract: An apparatus for holding a workpiece is incorporated in a polishing apparatus which polishes the workpiece to a flat mirror finish. The workpiece holding apparatus has a top ring holding a workpiece and a top ring drive shaft for rotating the top ring and pressing the top ring holding the workpiece against a turntable. A rotary joint is removably provided on the top ring drive shaft for allowing fluid to pass therethrough to thereby communicate with an external fluid source. A passage provided in the top ring drive shaft allows the rotary joint to communicate with through-holes formed in the top ring.

Abstract: A pump which is designed to be mounted within a recirculating water system where a portion of the recirculating water is diverted (bypass water) and cause to flow through the motor chamber with this recirculating water to absorb heat that is produced during the operation of the motor. The heated bypass water is then added back to the recirculating water. The pump includes an electric motor which is mounted within a pump motor chamber of a motor housing and is completely enclosed therein. The pump motor chamber is filled with oil thereby submerging of the electric motor in oil. A water conducting tube is mounted within the pump motor chamber and surrounds the electric motor. The tube inlets water from the pressure side of the pump impeller, conducts this bypass water entirely through the tube and then discharges the bypass water into the inlet of the recirculating water to the pump impeller.