Abstract: A clamshell heat exchanger comprises upper and lower clamshell plates assembled together and sealed at the peripheral edges thereof, the assembled plates defining at least three internal passageways communicating in a serpentine configuration. The passageways include an inlet passageway having an inlet port for receipt therethrough of combustion gases, an intermediate passageway and an exhaust passageway having an exit port for the discharge of combustion gases, all such passageways lying generally parallel to each other. In one arrangement of the heat exchanger, the upper and lower clamshell plates define an air gap between the inlet passageway and the intermediate passageway, with the intermediate passageway and the exhaust passageway being joined by a secured flattened portion of the upper and lower clamshell plates. In another arrangement, instead of an air gap, the inlet passageway and the intermediate passageway are also joined by secured flattened portions of the upper and lower clamshell plates.

Abstract: A radiator includes a neck including a pair of openings and a plurality of threads configured to engage a plurality of threads disposed within a radiator cap. The neck threads and the radiator cap threads each include a thread stop and a clearance and permit the radiator cap to rotate to a fully closed position. The clearance permits the radiator cap to move in an axial direction when not in the fully closed position without rotating from the fully closed position. The thread stops are configured prevent the radiator cap from rotating after moving axially.

Abstract: A radiator includes a core portion, a header tank, a side plate attached to the core portion and a bracket through which the radiator is mounted to a vehicle. The bracket is separately formed from the header tank, and is connected to the side plate through a bolt. As a result, the radiator is readily mounted to a vehicle of a different model by only changing an attachment position of the bracket to the radiator, without modifying the header tank. Further, the bracket includes a coolant receiving portion disposed to face a drain outlet of the header tank with a predetermined gap therebetween. Therefore, coolant discharged from the header tank collides with the coolant receiving portion to reduce its dynamic pressure. As a result, coolant drained from the radiator is restricted from being scattered.

Abstract: A heat exchanger for heat exchange between a working fluid and a coolant having an inner casing, an outer casing, and an annular space formed therebetween. A tube bundle including at least one tube formed into a helical coil is located within the annular space. End plates are removably secured and sealed to the ends of the outer casing. Bulkhead fittings are mounted in openings of the end plates to seal the tube ends which pass through the end plates. The bulkhead fittings are sized to permit the end plates to be moved off of the bulkhead fittings in a direction away from the helical coil. The tube bundle may also include a separating plate extending longitudinally between the coils of two tubes within the tube bundle creating two separate passages through which coolant may flow. External tubes may be connected at the tube ends, outside of the outer casing and the end plates, such that the working fluid flows in a parallel single-pass flow or a series double-pass flow through the annular space.

Abstract: A geothermal community loop field which serves as a shared means of heat exchange for a plurality of thermal loads. Heat is exchanged between the ground and a circulating heat exchange fluid in at least one subterranean heat exchanger. Heat is exchanged between each thermal load and the circulating heat exchange fluid by contacting the external heat exchanger of each thermal load with the circulating heat exchange fluid. Flow of the circulating heat exchange fluid between the geothermal community loop field and each thermal load is controlled by a plurality of flow control centers, each servicing one thermal load. The flow control centers provide means for installing additional thermal loads or maintaining existing loads without affecting the operation of the rest of the system. In addition, the flow control centers provide a means for setting the flow rate of heat exchange fluid to each thermal load.

Abstract: A down flow, two pass radiator includes a means for selectively venting air displaced during coolant fill from one side of the top tank flow baffle to the other, while the baffle remains fluid tight during normal operation. The uppermost wall of the top tank slopes continually upwardly from the far, low end of the tank to a filler neck at the opposite, high end. A vent inlet through the baffle, near the inner surface of the uppermost wall, may be covered and uncovered by a blocking valve accessible from outside the top tank. The valve is left closed during normal radiator operation, but opened during coolant fill to allow free escape of displaced air across the baffle and out through the open filler neck.

Abstract: An adaptor-retainer for quickly and easily selectively securing either a temperature sensor or a sealing plug in an opening in an automotive vehicle radiator header, depending upon whether that vehicle is or is not to be provided with a temperature sensor. The adaptor-retainer includes a retainer bushing having an inner end adapted to be secured and sealed in the opening, and a threaded outer end. A sealing bushing is adapted to be engaged in the retainer bushing for sealing cooperation with either the sealing plug or the sensor, whichever is installed, and a threaded retainer cap is adapted to be engaged on the threads of the retainer bushing to secure and seal either the sealing plug or the sensor in the retainer bushing by clamping it between the retainer cap and the sealing bushing.

Abstract: A refrigerant purging and storage system is provided operative, responsive to the operating pressure of refrigerant gas within the suction line dropping to a predetermined low pressure below the range of normal operating pressure of that suction line, to pump refrigerant gas from a closed-loop refrigerant circuit into a closed storage vessel, for a predetermined time period, only, and to prevent backflow of refrigerant gas from said storage vessel into said circuit.

Abstract: A plug for sealing the open end of a tube located in an opening in a tube sheet of a heat exchanger is described along with a method of installing the plug. The plug is comprised of a generally cylindrical metallic body of ductile material that is inserted into the open end of the tube at the tube sheet. The body carries one or more resilient seal rings and has a longitudinally extending blind central opening in the body. A body of pressure transmitting material, such as polyethylene is located in the body and an explosive charge is located in a longitudinally extending central opening in the body of pressure transmitting material. The explosive charge, when detonated, expands the metallic body of the plug and the resilient seal ring into sealing engagement with the tube.

Abstract: Tube plug and method for plugging a heat exchanger tube having an inner wall, which tube plug has a reduced susceptibility to stress corrosion cracking. The tube plug includes a shell having a closed end, an open end and an outer wall, the shell defining a chamber therein in communication with the open end of the shell. Disposed in the chamber is an expander member for expanding the outer wall of the shell into sealing engagement with the inner wall of the tube. A sealing member engages the expander member and is disposed across the open end of the shell for sealing the chamber defined by the shell so that fluid can not enter the chamber to corrosively attack the shell.

Abstract: A vapor condensation and liquid recovery system is provided where a turbine chamber is connected to a multi-chambered condensation unit. Each chamber of the condensation unit has a valved inlet port and a valved outlet port. The valved inlet ports of each chamber of the condensation unit are connected to the turbine chamber outlet. Each condensation chamber is provided with another valved port which is connected to a vacuum generating means. Each chamber is also provided with a further valved port connected to a purge pump. The valved outlet ports are connected to a fluid reservoir. All of the valves are opened and closed by valve control means such as a computer. The valve control means opens and closes the valved vacuum line, valved inlet ports, valved outlet ports, and valved purge line in a sequence to permit a condensable vapor to be continuously drawn through the turbine chamber where it rotates the turbine blades transferring energy from the vapor to the turbine shaft. As a result the vapor condenses.

Abstract: A fluid circulator and temperature regulator apparatus for use in an electrophoresis process with a sequencing cell including a cooling jacket having an inlet and an outlet, the apparatus being adapted to be connected to the cooling jacket inlet and outlet, and the apparatus comprising a reservoir, a pump for circulating cooling fluid through the cooling jacket, and a heat exchanger for regulating the temperature of the cooling fluid, the apparatus being operable for filling and draining the reservoir, for degasifying fluid in the reservoir, and for filling and draining the cell.

Abstract: An electronic apparatus comprises an electronic circuit unit having heat-generating electronic parts and cooling jackets fed with a coolant so as to cool the heat-generating electronic parts, and a coolant cooling unit having a heat exchanger for cooling the coolant from the cooling jackets and a pump for pressurizing and feeding the cooled coolant to the cooling jackets. The electronic circuit unit and the coolant cooling unit are housed in the same cabinet, and a partition plate is provided between the electronic circuit unit and coolant cooling unit to partition the two so that in the event of occurrence of liquid leakage, the coolant may be prevented from migrating from the coolant cooling unit to the electronic circuit unit. A coolant drainage drain may be provided at the bottom of a U-shaped portion of a path for circulating the coolant to facilitate drainage of the coolant.

Abstract: A process for the catalytic hydrogenation of organic compounds in the gas phase. The reaction product-containing circulating gas leaving the hydrogenation reactor is compressed without prior cooling, and is then used to heat the starting materials in a superheater to the reaction temperature. The circulating gas stream is further cooled in a hot-gas heat exchanger by cold reactants in a counter-current manner; as a result, substantially all the reaction product condenses out leaving recycle gas. After addition of fresh gas and starting material, the recycle gas is returned via a purification column to the hydrogenation reactor.

Abstract: The apparatus and method for flushing and draining the cooling system of a vehicle employs a drain pipe. The drain pipe connects to the bottom of the radiator, the bottom of the engine block or the lower radiator hose and has a bend of 180.degree. above both the inlet and outlet of the drain pipe. The outlet of the drain pipe is below the inlet for the drain pipe.

Abstract: An improved, easily removable plug for plugging the open end of a heat exchanger tube in a nuclear steam generator is disclosed herein. The plug generally comprises a cylindrical shell of Inconel.RTM. having tapered side walls, a closed end, an open end, a cork-shaped expander element disposed within the shell that radially expands the tapered side walls of the shell into sealing engagement with the inner walls of a tube when axially drawn from the closed to the open end of the shell, and a wall section in the interior of the shell between the closed end and the tapered side walls for receiving the expander element when this element is pushed back from the open end of the shell back against the closed end thereof, thereby affording clear mechanical access to the interior of the tapered side walls of the shell.

Abstract: A fastener structure for fastening together a plurality of members, such as the plurality of members comprising a tube plug, and a method for plugging an opening in a solid member, which may be a tube, for preventing the flow of fluid through the opening in a solid member or through the tube, such as a nuclear steam generator tube, comprises a first member, such as a shell, a second member, such as bolt structure, and locking structure. A deformable tab portion of the locking structure may have an undercut positioned so that when the second member is installed within the first member, a first surface of the undercut is bent toward a second surface of the undercut thereby plastically deforming the tab portion into a recess in at least one of the first and the second members for automatically securing together the plurality of members.

Abstract: A draincock assembly is designed so it may be molded with the radiator tank. The draincock assembly includes a drain for draining fluid from the heat exchanger. The drain includes a cam surface which receives a pin of a draincock therein. The draincock moves rotationally about and axially along a longitudinal axis defined by the drain between open and closed positions in a path defined by the pin moving along the cam surface. A detent is molded to the cam surface and prevents movement of the pin of the draincock therepast unless a rotational force is applied to the handle of the draincock. An O-ring at the end of the cylindrical body of the draincock provides a seal wherein no fluid may exit through the drain nipple until the O-ring moves past the drain nipple, creating a drainage path from the radiator tank.

Abstract: A nozzle dam assembly for closing off a nozzle of a steam generator and a process for remotely positioning such nozzle dam are disclosed. The nozzle dam includes a mounting ring mounted on an inner surface of the steam generator about a periphery of an inner opening of the nozzle, at least one substantially planar central section and two substantially planar side sections together forming a substantially planar surface, the surface being of a greater diameter than the inner opening of the nozzle. Securing devices are also provided for securing each of the sections to the mounting ring after all the sections are positioned over the inner opening of the nozzle.

Abstract: A plug and method for plugging a penetration in a pressure vessel wall having a sleeve protruding through the penetration. The sleeve is cut at a point between the interior and exterior surfaces of the pressure vessel wall. The cut portion of the sleeve extending beyond the exterior surface of the pressure vessel wall is removed. A plug sized to fit within the penetration is inserted into the penetration so that one end of the plug is flush with the exterior surface of the pressure vessel wall. A weld pad is deposited on the end of the plug and the exterior surface of the pressure vessel wall.

Abstract: The apparatus and method for flushing and draining the radiator and cooling system of a vehicle employs a drain pipe which allows for draining of the radiator and flushing of the cooling system. A drain pipe which connects to the bottom of the radiator has a bend of 180.degree. near the top of the radiator but below the fluid level of the radiator. The outlet of the drain pipe is below the inlet for the drain pipe.

Abstract: The device for pressure-sealed obturation comprises a flexible tubular casing (22) having an open end along the perimeter of which the casing constitutes an inflatable toric seal (30) and a base (22a) in the form of a glove finger on which there is fixed the end of a shaft (21) disposed at the central part of the casing (22). The shaft (21) passes through the base (22a) of the casing (22) in a sealed manner. The device also comprises a plate (38) for retaining the casing (22) comprising at least two parts articulated to one another as well as retention plate (41) for fixing the retaining plate (38) under the base (22a). Ring shaped elements (43) are retained against the toric seal (30) by an articulated spacing device (47).

Abstract: A hollow plug for blocking a heat exchanger tube includes an expansion zone expanded into a frictional connection with the heat exchanger tube. An outer surface in the expansion zone has a first part with a relatively greater surface hardness and a second part with a relatively lesser surface hardness. The first part has a greater surface hardness than the heat exchanger tube. The second part has a lesser surface hardness than the heat exchanger tube. The first part also has a relief pattern.

Abstract: The present invention relates to rod plug caps for leaky tubes of a heat exchanger. The rod plug caps include a frustrum shaped tapered hollow plug having a top, a length, and a diameter. The diameter of the top being the widest of the plug. A plug nut is formed on the top of the plug. The plug nut and the plug are formed from one homogeneous piece of material.

Abstract: The plug comprises a tubular body (2), closed at one of its ends by a bottom (3), a bush (5) placed inside the body (2) in an expansion zone and an expander core (6). The bush (5) has at least two elastic cylindrical sectors, separated by at least two longitudinal slots (8), and an actuating surface (5c) widened in the direction of the bottom (3) of the plug. The expander core (6) engaged inside the slotted bush (5) has a corresponding actuating surface (6c) on its outer surface. The plug (1) can be expanded by shifting the expander core (6) towards the open end of the body (2) of the plug opposite its bottom (3), and can be removed simply by pushing the expander core (6) against the bottom (3) of the body (2) of the plug (1).

Abstract: A high confidence tube plug for sealing the bore of a tube against fluid flow has an elastomeric sleeve for sealing the tube. An axially aligned hydroscopic disk swells when contacted with water to frictionally grip the tube. The sleeve and the disk are fastened together by a bolt and nut arrangement.

Abstract: A heat exchanging or circulation apparatus comprising a system of conduits connected to an inlet and an outlet for circulating water or other practically incompressible liquid through the system, heat being transferred through the conduit walls, circulation through the apparatus being periodically shut-off, whereupon continued heat transfer through the conduit walls causes freezing of the liquid to ice in the conduits.

Abstract: Device for warming or defrosting products for injection or perfusion, particularly blood products, contained in hermetically sealed bottles or bags (10), comprising a cell (1), means making it possible to continuously introduce temperature-controlled water into the cell and possessing at least one inlet line (4) in which are fitted an adjustable thermostatic tap (2) connected on the one hand to a cold water distribution network (2a) and on the other hand to a hot water distribution network (2b), and a flow control valve (3), the cell being provided in its upper part with at least one overflow (5) for the flow of water, such that at least one bag or bottle (10) of product arranged in the cell (1) is submerged, the temperature-controlled water circulating around the bag or bottle.

Abstract: Apparatus for restraining the tip of a tube plug from traveling in a tubular member when the tip is fracturedly separated from the plug during the process of extracting the plug from the tubular member. The tube plug includes a shell defining an open cavity therein inwardly tapered from the tip of the plug. Slidably captured in the cavity is a shell expander which has a first bore therein, for expanding the shell into sealing engagement with the tubular member. The apparatus comprises an expansible restrainer, which is disposed in the first bore, for radially expanding the expander into engagement with the shell by radially expansibly engaging the first bore when axially compressed in the first bore. When the restrainer radially expansibly engages the first bore, the expander expansibly engages the shell for restraining the tip of the shell when the tip is fracturedly separated from the shell so that the tip does not travel in the tube and become lodged in or damage the tube.

Abstract: The device comprises a sleeve (1) and a stopper (5). The inside bore of the sleeve (1) comprises a part having a diameter smaller than the outside diameter of the stopper (5) and ending in a shoulder (2c), against which the stopper (5) comes to bear. Swaging (9) enables the stopper (5) to be fixed in the sleeve (1). The fastening is completed by three sealing welds (10a, 10b, 10c), between which are provided an aperture (4) passing through the side wall of the sleeve (1) and an aperture (8) passing through the side wall of the stopper (5). The device is used in particular for closing holes in a tubular plate of a steam generator of a pressurized water nuclear reactor.

Abstract: A heat exchanger for recovering heat from exhaust gases which includes a plurality of separately divided portions, a fluid passage mechanism for a fluid disposed within each of the portions, a bypass mechanism for the fluid for bypassing each of the portions and a valve mechanism for selectively operating the fluid passage mechanism or the bypass mechanism. The plurality of portions may constitute at least two chambers separately provided in the heat exchanger or at least two parts independently provided ion the heat exchanger. In addition, discharge means for discharging the fluid in the plurality of portions is provided.

Abstract: A table carries guides for receiving and guiding a heat pipe. The heat pipe has a fill port which contains a valve. The heat pipe is thrust against the seal face of a block for evacuating and filling the fluid chamber of the heat pipe. A hex driver passes through the block and engages the valve to open and close the valve while the fill port is sealed from the atmosphere.

Abstract: The multi-seal tube plug comprises a substantially cylindrical sheath closed at one end and having a central cavity. An expander is received within the central cavity of the sheath and acts to expand the sheath into contact with the tube. The expander comprises a plurality of radially expandable disks having a central aperture and an expander member adapted to be received within the aperture and to expand the disks. The expanded disks expand a portion of the sheath into contact with the tube to sealingly engage the tube. The expander member is preferably conical and interacts with the conical inner surfaces of the disks. An alternate embodiment of the multi-seal tube plug uses conical washers rather than radially expandable flat disks. All embodiments of the multi-seal tube plug are easily removable and do not damage the tube.

Abstract: Referring to method and plant for the condensation of excess steam obtained from steam-producing and steam-consuming facilities it is intended to provide a solution which avoids the release of steam into the atmosphere and the absorption of oxygen by the condensate. The problem is solved by indirect heat-exchange in a condenser that is filled with an oxygen-free fluid which is displaced by the excess steam into a receiver, the fluid being returned to the condenser in the absence of an excess steam flow. Referring to the plant, the problem is solved in that a condensate receiver (5) with gas dome is arranged downstream of the condensate header (4) of condenser (2), a line (11) for condensate discharge being provided between condensate header (4) and condensate receiver (5) while a line (10) for the inert gas is connected to the gas dome (9).

Abstract: A transverse-flow radiator for internal combustion engines, which is equipped with a plastic water chamber and a balancing chamber joined to this water chamber and wherein by an air venting line from leading from a high point of the water chamber via a liquid lock molded onto the balancing chamber, and wherein a vertical main part of the venting line has a lower molded-out opening which controls a discharge valve with discharge connections that can be mutually connected or closed off which lead to the water chamber, the balancing chamber and a discharge opening.

Abstract: A tube plug for stopping the bore of a condensor tube or like conduit. The plug device includes a shoulder bolt having a flange at one end and a threaded shaft at the other. An enlarged shank portion extends outwardly a distance from the flange and terminates at a shoulder region. A resilient sleeve of an elastomeric material is positioned on the enlarged shank, bearing against the flange at one end, with the opposite sleeve end spaced outwardly from the bolt shoulder region. Mechanical gripper elements are positioned on the bolt and are expanded by movement of a nut along the threaded shaft. A washer positioned between the resilient sleeve and the mechanical gripper elements transmits an axial compressive force to the resilient sleeve to create first and second fluid seals around the sleeve and around the bolt shank respectively. The washer stops at the shoulder region to permit additional torquing of the mechanical gripping elements independent of the resilient sleeve.

Abstract: The tube plug comprises a substantially cylindrical sheath closed at one end and having a relatively smooth outer surface and a central cavity. An expandable shell is received within the central cavity of the sheath. An expander member is adapted to expand the shell from within by being axially translated within the shell, the expander member also being adapted to grip the inner surface of the shell to retain the expander member in the expanded position. The outside surface of the shell is preferably provided with a plurality of lands. A second embodiment of the tube plug comprises a sleeve, a closed shell member adapted to be inserted within the sleeve, and an expander member contained within the shell. Upon axial translation of the expander member within the shell, the shell is expanded into contact with the sleeve and the sleeve is expanded into contact with the tube, thereby sealing the tube.

Abstract: A valve for use in changing automatic transmission fluid, obviating the need of removing the oil pan. The valve is interposed in the hose line connecting the transmission fluid outlet to the cooler inlet. The valve has an interior, control slide to allow, in its first state thereof, the normal flow of the fluid from the transmission to the cooler, and, in the second state thereof, diverts the flow from the transmission to a drain outlet for deposit of the old oil in a container for eventual disposal. In using the valve, a desired amount of old oil is drained, and simultaneous therewith new oil is added to the transmission. The control slide is held in its first state by a spring, and is held in its second state by a hollow push-rod connected to the dispensing outlet of a container, the push-rod and its associated mounting element allowing for the through-flow of the old oil directly to the container.

Abstract: An improved horizontal type radiator is disclosed in which the top wall of a header tank, into which a bank of radiator tubes are opened, is externally raised into an annular bulge formed to encircle an upper pipe hole bored in the wall through which a water filling pipe is inserted into the header tank forming an annular space about the inserted lower end of the pipe. Also, the bottom wall of the header tank is outwardly bulged into an annular bulge formed to encircle a lower pipe hole bored in the wall through which a water passage pipe is inserted into the header tank forming an annular space about the inserted end portion of the water passage pipe. With this arrangement, in operation when the water flows from the radiator tubes into the header tank, the water has limited chance of entraining air within the header tank, since the upper annular space in which air may possibly be entrained offers only a minimum contact surface of air with the water.

Abstract: The tube plug removal machine removes any type of tube plug by drilling into a plug portion with a tap drill bit, engaging that plug portion with a threaded section of the tap drill bit after the drilled hole has been threaded by a tapping section thereof, and removing a portion of the tube holding the plug in the tube with a counterbore drill bit mounted concentrically about the tap drill bit. A trip pin and trip spline enable the tap drill bit to be automatically disengaged from the motor once the tap drill bit has been threaded into engagement with the plug. The conterbore drill bit is thereafter self-centered with respect to the tube and plug about the now stationary tap drill bit. After a portion of the plug has been removed by the counterbore drill bit, pulling on the tap drill bit will remove the remaining plug portion from the tube.

Abstract: A system for sensing a leak of ammonia refrigerant into a refrigerated environment and for automatically purging the refrigeration equipment within the environment of refrigerant.

Abstract: A preferred embodiment of the invention comprises a sprinklerless snow control system for reducing the buildup of snow upon an exterior surface such as a roadway, parking lot, roof structure or the like including a water lift well extending beneath the surface of the earth and positioned adjacent to an exterior surface to be protected from the buildup of snow. A pump is positioned wiithin the water lift well to raise relatively warm subsurface water having a temperature greater than freezing from the earth and delivering the relatively warm water into a conduit heat exchange system positioned beneath an exterior surface to be protected from snow buildup. At least one recharging well is positioned adjacent to the exterior surface to be protected and receives water from the conduit system positioned beneath the surface to be protected for permitting the water to re-enter the ground to be recharged with solar and/or geothermal heat stored within the ground.

Abstract: A remotely operable tool assembly includes a tool for plugging heat exchanger tubes, the tool including a multi-partite plug to be clamped to a tube, a nut connected to one of the parts of the plug, a tensioning device including a rod to be connected to the nut, and a sleeve surrounding the rod for connection to the nut, a linear drive connected to the rod for moving the rod in a linear direction in turn moving the plug parts into and out of a tensioning position, and a rotary drive coupleable to the sleeve for rotating the sleeve with a screw motion in the tensioning position of the plug parts.

Abstract: A draincock and drain hole for a motor vehicle radiator have a cooperative relationship that effects sealed closure of the drain hole with an o-ring and both locks the draincock in its closed position and retains same in the drain hole in an open position.

Abstract: A heat exchanger tube plug, which is used to seal the ends of heat exchanger tubes and similar conduits, comprises a hollow housing member which has at one end a relatively large open bore surrounded by a thin wall, and a relatively smaller threaded bore which communicates with the larger bore. An insert member is provided which, in use, is threaded into the smaller bore thereby causing a tapered portion which is formed on the insert member to engage the open end of the large bore causing it to expand and bear against the wall of a heat exchanger tube into which the heat exchanger tube plug has been inserted.During use, the housing member is prevented from rotating relative to the heat exchanger tube by means of an eccentric assembly which is mounted on the end of the housing member.

Abstract: A compact unitary heat exchanger and debubbler for a liquid includes an elongated heat exchange element having an inverted V-shape and a vertically-extending debubbling chamber located between the legs of the inverted V. The heat exchange element is made up of an inner tube surrounded by an outer tube, so that a heat exchange fluid such as water flowing within the inner tube exchanges heat with a treated liquid flowing within a space defined between the inner and outer tubes. After passing through the heat exchange element the treated liquid passes through the debubbling chamber and then through the device outlet. A bypass passageway in the vicinity of the treated liquid inlet to the device connects the debubbling chamber with the space between the inner and outer tubes of the heat exchange element. A valve movable into open and closed positions is provided in this bypass passageway.

Abstract: A method and means for continuously introducing nitrogen into the primary coolant side of each steam generator during drain-down of a nuclear powered steam generating system is described, which will prevent the forming of a vacuum at the tops of the inverted U-tubes of the generators, thus to allow continuous drain-down of the water from within the tubes.

Abstract: A steam generator wrapper closure and a method of installing the same includes a plug member (108) which includes a large diameter portion (110) and a small diameter portion (112) with an annular shoulder portion (114) defined therebetween. A locking pawl (124) is rotatably mounted upon the plug (108) through means of its shaft (122). A pawl shaft extension rod (154) and a handle (150) are utilized to manipulate the pawl (124) and the plug (108) from a position external to the steam generator outer shell (16). The axis of the pawl shaft (122) is radially offset with repect to the axis of the plug (108), and the diametrical extent of the pawl (124) is less than that of the small diameter portion (112) of the plug (108).

Abstract: A reactor, especially for exothermic reactions like methanol synthesis, comprises a tube bundle in which the coiling tube extends through a body of particles to facilitate the discharge of depleted particles from the catalyst space and to increase the pressure resistance of the assembly, the tube sheet at the opposite ends of the bore being convex inwardly. The tube bundle has a helical configuration and the tube sheets are hemispherical in shape in the region where the tubes intersect with the tube sheet. The tubes intersect the bottom tube sheet in radial rows of openings wherein the rows are spaced to facilitate the discharge of catalyst particles.

Abstract: A valve (10) for a water temperature control system having a heat exchanger (C), a tank (T), and a pump (P) for circulating heat transfer fluid through a supply line (11, 12, 13) from the tank to the heat exchanger and through a return line (14, 15) from the heat exchanger to the tank including a valve housing (20) interposed in both the supply line and the return line having supply inlet and supply outlet connections (24, 25), having return inlet and return outlet connections (26, 28), and having first and second drain connections (29), a valve element (45) associated with the valve housing having a first position for normally circulating the heat transfer fluid from the supply inlet connection to the supply outlet connection and from the return inlet connection to the return outlet connection and having a second position discontinuing circulation through the supply inlet connection and the return outlet connection and connecting the supply outlet connection to the first drain connection and the return outle