Abstract: A device for alternately applying pressure and vacuum to pipes in order to remove or prevent build-up of undesirable coatings inside the pipes is disclosed. The device includes a pressure and vacuum source connected to a plenum having a hose attached to the plenum at a proximal end and a control mechanism attached to the hose near a distal end. The control mechanism is operable to control the plenum to rapidly switch between variable amounts of vacuum and pressure to the hose. The plenum may also be controlled to supply neither vacuum nor pressure to the hose. The device may be used in a wide variety of settings, including industrial, commercial, marine hospitality industry, and household settings.

Abstract: A process is provided for cleaning a surface of an internal cavity of a gas turbine component having sulfidation or sulfur bearing deposits comprising: inserting into the internal cavity a fluoride salt; and heating the fluoride salt and the component in an inert atmosphere for a time and at a temperature to clean the sulfidation or sulfur bearing deposits on the surface. In a preferred embodiment the cleaned internal surface is then coated with a metallic coating.

Abstract: A method for cleaning a heat exchanging coil in an air conditioning unit using a low-pressure cleaning system to remove foreign particles that have accumulated on the heat exchanging coil. The low-pressure cleaning system discharges air at a low pressure, high velocity, and a high volume in order to clean the heat exchanging coil. Further, the low-pressure cleaning system can inject a substance into the discharge air flow to aid in cleaning the heat exchanging coil.

Abstract: An apparatus for scarifying an interior surface of a sewer pipe, which includes a vehicle moveable along an interior of the sewer pipe and a scarifying assembly connected to the vehicle having a fluid nozzle assembly. The fluid nozzle assembly has at least one branch with a fluid nozzle coupled to a distal end of the branch. The nozzle is positioned proximate the interior surface of the passageway. The fluid nozzle assembly is operative to rotate or oscillate and to emit a jet of fluid from the one nozzle against the interior surface of the passageway and to scarify the interior surface of the passageway as the vehicle moves along the passageway.

Abstract: A method for cleaning an exhaust stack tube of an oil tank heater comprises the steps of securing collection drums at open ends of a heater tube using attaching straps; securing a drop cloth over an exhaust end of the heater tube with an attaching strap; interconnecting the collection drums to one of a vacuum apparatus and a receptacle container; attaching a nozzle to an end of a high pressure hose; inserting the nozzle under the drop cloth and into an exhaust end of the heater tube; forcing wash water under pressure through the nozzle; guiding the nozzle to the top of the exhaust stack; pulling the nozzle back a few feet and, again, guiding the nozzle upward while rotating the nozzle; and repeating this process until the nozzle reaches the bottom of the exhaust stack.

Abstract: A device for mechanically cleaning a grooves used to hold a rotor or a stator winding of an electric machine includes an axially moveable device carrier and at least one cleaning tool connected to the device carrier and extending radially from the device carrier into the groove. In addition, a corresponding method includes the steps of radially moving at least one cleaning tool connected to a device carrier so as to mechanically remove impurities on a wall section of the groove, axial advancing of the device carrier in a manner adapted to the radial movement of the at least one cleaning tool, and setting the dimensional tolerance range for the groove by adjusting the cleaning tool. The device and the method are suitable for cleaning grooves into which a new winding is to be installed in an existing laminated body, for example, in the case of the retrofitting of generators.

Abstract: The present invention is directed to processes for removing a contaminant from dental effluents and includes transporting a three-phase effluent through a suction line into a particle collection vessel, introducing a suction line cleaning solution which includes a reagent into the suction line, and introducing the three phase effluent and the line cleaning solution into the collection vessel, wherein the effluent separates into solid. liquid, and gas phases in the collection vessel and the reagent includes a flocculant and/or a precipitant. and removing the gaseous and liquid phases from the collection vessel. The contaminant includes mercury. lead. and arsenic.

Abstract: A cleaning apparatus and method to be used with an endotracheal tube and including an elongate tubular member that extends into the endotracheal tube. A cleaning assembly which may include an irregular outer surface is provided at a distal end of the elongate tubular member and is radially expandable to engage the interior wall of the endotracheal tube for cleaning thereof. A ventilator coupling is further provided and is connected to the endotracheal tube, a first inlet port of the ventilator coupling being coupled to a ventilator assembly to supply air to a patient, and a second inlet port of the ventilator coupling being structured to receive the elongate tubular member there through into the endotracheal tube.

Abstract: An apparatus for dispensing misted cleaning or disinfecting solution at one or more atomizing discharge ports for cleaning suction conduits, such as HVE conduits. The apparatus includes a venturi valve to extract concentrated cleaning/disinfectant fluid from a storage container. The concentrated fluid is mixed with a pressurized venturi-operating fluid, typically water, before being suctioned through an atomizing discharge port and entering the conduit to be cleaned.

Abstract: The invention provides a method for the removal of contaminating materials from pipework, the contaminating materials comprising deposits on the pipework which cause a reduction in the effective internal diameter of the pipes and thereby effect a reduction in the rate of flow of a fluid through the pipework, the method comprising treating the contaminating materials with at least one carbamate salt. The methods is also suitable for the treatment of contaminating materials which have a particularly deleterious effect on fluid flow and comprise partial or total blockages of the pipework. The carbamate is preferably in the form of an aqueous solution, and a preferred carbamate salt is ammonium carbamate. The treatment may be carried out in the presence of an additive such as caesium carbonate or ammonium bicarbonate. Optionally the treatment may be accompanied by a pre-treatment or post-treatment with aid, this being followed by a water wash.

Abstract: A pipe renovating method and system in which a pipe is first cleaned and then coated with a suitable coating material. In the cleaning step, pressurized air and particles of abrasive material are pumped into a first end of a pipe while suction is applied to the second end of the pipe via a vacuum pump to improve flow along the entire length of the pipe. The coating material is subsequently pumped in at one end of the cleaned pipe while suction is applied at the other end. In each step, the suction flow rate is higher than the input flow rate, so as to steer the mixture towards the second end. This method can be used to coat and clean different sections of a pipe system, by connecting the input materials successively to different access ports in the system.

Abstract: A method for controlling the positioning of a stream of pressurized fluid against a surface zone of a stream generator to clean contaminants. The coordinates of a plurality of points of the surface zone to be cleaned are first determined. The coordinates are measured with respect to a fixed coordinate system with origin point at the location where the lance water cannon penetrates the cannon wall of the steam generator. The determined boundary points are converted into corresponding angles with respect to the horizontal plane and the cannon wall. These angles are then used directly to control the position of the lance with respect to the fixed coordinate system. The stream of pressurized fluid is directed against the surface zone in a predetermined pattern by monitoring and controlling the angle of the lance through axial resolvers.

Abstract: A biological treatment system, including a wastewater system drain field and at least one perforated distribution pipe located within the drain field and adapted to receive effluent. At least one perforated outer pipe surrounds the at least one distribution pipe to receive effluent from the at least one distribution pipe and to dispense the effluent to the drain field after it has been biologically treated in the at least one outer pipe. The system also includes a method of biological treatment comprising the steps of supplying effluent to at least one vessel positioned within a wastewater drain field; delivering gas to the at least one vessel to interact with the effluent such that the effluent experiences aerobic biological treatment; and passing biologically treated effluent from the at least one vessel to the wastewater drain field.

Abstract: A micro device in which a functional element can be moved between an operating position and a waiting position by the displacement of support means coupled to a substrate. The micro device has a cantilever structure in which one end of support means is made a fixed one fixed to the substrate and the other end to which an active element is provided is made a free end. A spring portion is provided to at least part of the support means, and thus the active element can be greatly displaced by a small stress.

Abstract: The present invention provides an apparatus for removing fumes from an endoscope disinfecting apparatus configured for disinfecting an endoscope with a disinfecting solution. In architecture, the exhaust system includes a fan housing, a fan disposed within the fan housing, an exhaust hose connected to the fan housing, and wherein the exhaust system is connected to the endoscope disinfecting apparatus.

Abstract: The invention relates to a method of low temperature cleaning and applying an antimicrobial treatment to food and beverage plant equipment. In addition, the method includes carbon dioxide compatible chemistry. The method may be achieved through a multi-step method.

Abstract: A method of clearing residue from a fluid conduit includes commencing flush fluid flow through the fluid conduit and injecting a first fluid into the fluid conduit at a first point to induce turbulent flow of the flush fluid. The first fluid is preferably a gas. The method further includes sampling the flush fluid downstream of the first point to confirm the residue is adequately cleared from the fluid conduit.

Abstract: A method for cleaning portions of a particle classifier, such as for example the rotor and/or stator, includes providing carbon dioxide particles to the classifier. Carbon dioxide particles are supplied to the classifier via a particle inlet and subjected to processing conditions similar to those utilized in particle classification. Cleaning a classifier with carbon dioxide particles may be accomplished off-line or on-line.

Abstract: A method of remediating deposits within a pipeline comprising inserting a removable smaller pipe within said pipeline, providing an electrically insulating coating on said smaller pipe, providing a contactor proximate said distal end of said smaller pipe to electrically contact said internal diameter of said pipeline, flowing an electrical current along the wall area of said internal pipe, through said contactor, and along the wall area of said pipeline to generate heat within said smaller pipe to remediate blockages within said smaller pipe.

Abstract: A method for cleaning or otherwise removing amorphous carbon and other residues that arise in growth of a carbon nanotube (CNT) array. The CNT array is exposed to a plurality of hydroxyls or hydrogen, produced from a selected vapor or liquid source such as H2O or H2O2, and the hydroxyls or hydrogen (neutral or electrically charged) react with the residues to produce partly or fully dissolved or hydrogenated or hydroxylizated products that can be removed or separated from the CNT array. The hydroxyls or hydrogen can be produced by heating the CNT array, residue and selected vapor or liquid source or by application of an electromagnetic excitation signal with a selected frequency or range of frequencies to dissociate the selected vapor or liquid. The excitation frequency can be “chirped” to cover a selected range of frequencies corresponding to dissociation of the selected vapor or liquid. Sonication may be used to supplement dissociation of the H2O and/or H2O2.

Abstract: Methods and compositions for cleaning and maintaining chemical, biological and radiological countermeasure washdown systems are disclosed. Systems are effectively cleaned by the removal of water scale, including deposits, sediment, microbiological scale, microinvertebrate fouling, and the like, from the inside surfaces of piping in the system. A section of the system is isolated for cleaning and an aqueous acidic cleaning solution is circulated through the fouled pipe section to be cleaned for a sufficient time and at a controlled pH to dissolve and loosen the scale. After cleaning all of the sections, the system is restored to operational readiness.

Abstract: The invention relates to a method of low temperature cleaning and applying an antimicrobial treatment to food and beverage plant equipment. In addition, the method includes carbon dioxide compatible chemistry. The method may be achieved through a multi-step method.

Abstract: A device and method for automatically flushing hydrants. The device is installed externally to an existing hydrant. The device comprises a nipple having an internally threaded collar for attaching the device to a hydrant outlet, a valve, a control for automatically operating the valve, and a lockable box containing at least the valve, the box having an outlet for allowing water from the hydrant to pass from the valve to the exterior of the box. The box functions as an enclosure and may be of any desired configuration.

Abstract: Hollow porous fibers containing adhered contaminants are cleaned to remove the contaminants by backflushing a liquid to fill the pores, and adding a flow of gas so as to form a two-phase mixture of gas and bubbles of liquid that can scrub the fibers, loosening the contaminants and allowing them to be flushed from the hollow fibers. The method is particularly useful for cleaning hemodialyzers used for dialysis and hollow fiber modules used in water treatment and separations. The two phase flow method is specifically effective in cleaning piping systems having high length to diameter (l/d) ratios.

Abstract: A gas-circulating processing apparatus which comprises a processing chamber, a gas feeding piping, a gas supply piping, a first exhaust mechanism discharging a gas from the processing chamber, a second exhaust mechanism discharging a portion of a gas discharged from the first exhaust mechanism, a back pressure adjusting mechanism interposed between the first exhaust mechanism and the second exhaust mechanism to adjust a back pressure of the first exhaust mechanism, and a gas circulating piping which is configured to combine another portion of the gas that has been discharged from the first exhaust mechanism with a processing gas supplied from the gas supply piping, wherein the gas feeding piping has a larger inner diameter than that of the gas supply, or the processing gas is introduced into the first exhaust mechanism, or a first heater is provided to heat at least part of the circulating route.

Abstract: A cleaning method and an etching method for removing, by cleaning grease components and silicon micro pieces hard to remove, used for an apparatus and a carrier for manufacturing a semiconductor wafer or a semiconductor device. Matters to be removed are brought into contact with XeF2 gas produced by sublimation in a vacuum atmosphere to decompose and gasify the grease components and to remove silicon pieces by etching. If a trace of residual water is left in the vacuum atmosphere before the cleaning, the H2O reacts with XeF2, so that HF is produced. Therefore, for example, the native oxide SiO2 formed on the silicon pieces can be removed, and XeF2 can directly react with silicon, thereby enabling etching. The cleaning and etching speeds are extremely accelerated.

Abstract: Disclosed are systems and methods for removing stubborn contaminants, aluminum fluoride and aluminum chloride in particular, from components of semiconductor-processing equipment. One embodiment forces steam through small holes in a gas distribution plate to remove build up on the interior walls of the holes. A cleaning fixture disposed between the steam source and the gas distribution plate delivers the steam at increased pressures. The gas distribution plate can be immersed in water during cleaning to capture the exiting steam.

Abstract: Disclosed is a novel process for cleaning and restoring the operating efficiency of organic liquid chemical exchangers in a safe and effective manner and in a very short period of time, without a need to disassemble the equipment and without the need to rinse contaminate from the equipment after cleaning. Used is a formulation of monocyclic saturated terpene mixed with a non-ionic surfactant package specifically suited to oil rinsing. The terpene-based chemical is injected into organically contaminated exchangers using a novel process involving high-pressure steam to form a very effective cleaning vapor.

Abstract: The invention proposes a process and device for the at least partial elimination of carbon deposits in a heat exchanger in which an oxidation treatment is carried out comprising at least one controlled-oxidation stage at a conventional temperature between 400 and about 500° C. for a period of at least 4 hours, by means of an oxidizing fluid comprising for the greater part an inert gas, and a lesser quantity of oxygen, under conditions such that the temperatures of the fluids feeding or leaving the heat exchanger remain below about 520° C. throughout the oxidation treatment, and in that the hot approach of the exchanger remains below about 120° C. throughout the oxidation treatment. The invention also relates to a hydrotreatment system for the implementation of this process and this device.

Abstract: A flush system comprising a network of conduits, valves and screens that can be interposed between the process container and solvent re-claim tank components of a dry film photoresist (DFR) remover system, for example, that is used in the processing and packaging of integrated circuit chips. By operation of the valves in the flush system, DFR particles can be removed from the DFR remover system in order to prevent or minimize particle clogging of a particle filter in the DFR remover system. The screens in the flush system can be periodically cleaned by reverse flow of solvent or by operation of a nitrogen and DI (deionized) water purge system.

Abstract: A reprocessing unit for the reprocessing of a device having internal passageways by applying a fluid at a plurality of pressures to the internal passageways of the device to permit reuse of the device in a clean environment, the reprocessing unit including a pressure differentiation device for receiving a fluid having a single input pressure, the pressure differentiation device having first and second pressure control fittings for providing first and second differing pressure outputs in accordance with the single input pressure. Also included are tubing for transmitting the fluid at the first and second differing pressures from the pressure differentiation device to the internal passageways whereby the internal passageways are reprocessed with the transmitted fluid at the first and second differing pressures and the internal passageways are reprocessed at differing pressures in accordance with the single input pressure.

Abstract: A coherent body (B) of wet crushed ice is pumped along a pipe (5). The crushed ice body can be used as a means of cleaning the pipe wall, as a means of driving a product liquid out of the pipe for recovery, or as a barrier for preventing mixing of two different bodies of liquid (1,2) in the pipe to either side of it. Being coherent but flowable and non-tensile, the mass of crushed ice can negotiate internal constrictions, obstructions and junctions of the pipe readily, unlike conventional solid or gelled pigs.

Abstract: A cleaning method for removing fats, oils, and silicon small particles, which are conventionally difficult to remove, adhering to devices and carriers used to manufacture a semiconductor wafer or a semiconductor device. An etching method is also disclosed. XeF2 gas produced by sublimation is made to contact with an object to be cleaned in a vacuum atmosphere so as to decompose and gasify the oils and fats and to remove silicon small particles by etching. Prior to the cleaning, when a trace amount of residual water is left in the vacuum atmosphere, H2O reacts with XeF2, and HF is produced. For example, a native oxide SiO2 formed on the surface of silicon small particles can be removed, and XeF2 directly reacts with silicon, therby enabling etching. The cleaning etching rates are extremely high.

Abstract: The present invention discloses a method for the removal of a number of molecular contaminants from surfaces within a device. A purge gas containing oxygen and/or water is introduced into the interior of the device, contacting at least a portion of the interior surfaces. A contaminated purge gas is produced by transferring a portion of the contamination from the interior surfaces into the purge gas. The contaminated purge gas is removed from the device and the process is continued until the contaminant concentration in the contaminated purge gas is below a predetermined level.

Abstract: In a method of cleaning metal-containing deposits such as tantalum from a surface of a process chamber component, such as a metal surface, the surface is immersed in a cleaning solution. In one version, the cleaning solution is a solution having HF and HNO3 in a ratio that removes deposits from the surface substantially without eroding the surface. In another version, the cleaning solution is a solution having KOH and H2O2. The solution can be treated after cleaning the surface to recover tantalum-containing materials and one or more of the cleaning solutions.

Abstract: Disclosed is a novel process for interior cleaning and by cleaning, removing noxious gas and/or restoring the operating efficiency of organically contaminated hydrocarbon processing equipment in a safe and effective manner and in a very short period of time, without a need to manually enter an unsafe environment and mechanically remove organic contaminants. Used is a formulation of non-aqueous, monocyclic saturated terpene mixed with a non-ionic surfactant package. The terpene-based chemical is injected into organically contaminated equipment using a novel process involving high-pressure steam to form a very effective cleaning vapor.

Abstract: The invention relates to a cleaning fluid for a refrigeration plant, characterized in that it comprises a cleaning oil mixed with a liquefied carrier gas with which it forms, by expansion, a cleaning foam, for example the oil is a POE or a PAG and the gas is R134a. The invention also relates to a cleaning method. This comprises the following steps: the step of creating a foam from the oil and a liquefied gas in which it is at least partly miscible; the step of making the foam circulate in the said component; and the step of extracting the foam. In particular, the plant is rinsed with the gas separated from the cleaning foam, in order to remove the oil residues.

Abstract: Disclosed is a novel process for interior cleaning and by cleaning, removing noxious gas and/or restoring the operating efficiency of organically contaminated hydrocarbon processing dynamic devices in a safe and effective manner and in a very short period of time, without a need to manually enter an unsafe environment and mechanically remove organic contaminants. Used is a formulation of non-aqueous, monocyclic saturated terpene mixed with a non-ionic surfactant package. The terpene-based chemical is injected into the organically contaminated device using a novel process involving high-pressure steam to form a very effective cleaning vapor. The device is activated during the process. The vapor may be optionally directed against the normal-flow direction of the device.

Abstract: This invention provides a method of treating a dry or processed fluid pipe line susceptible to the build-up of iron sulfide deposits by complexing the iron sulfide in the pipe lines. The method of the present invention introduces the composition on a continuous or a batch basis to a gas pipe line. The composition is made of a solution of 1) water, 2) [tetrakis(hydroxymethyl)phosphonium]sulfate or chloride, and 3) a soluble ammonium salt, such as ammonium chloride or the like.

Abstract: A system for processing substrates within a chamber and for cleaning accumulated material from chamber components is provided. The system includes a reactive species generator adapted to generate a reactive gas species for chemically etching accumulated material from chamber components, and a processing chamber having at least one component with a mirror polished surface which is exposed to the reactive species. Preferably to have the greatest impact on chamber cleaning efficiency, the mirror polished surface is a surface of a component such as a gas distribution plate or a backing plate, and/or is a surface of a plurality of smaller components (e.g., chamber wall liners, a gas conductance line, etc.) so as to constitute a large percentage of the surface area exposed to the reactive species. Most preferably all bare aluminum surfaces which the reactive species contacts are mirror polished.

Abstract: A method for the reprocessing of a device having internal passageways by applying a fluid at a plurality of pressures to the internal passageways of the device to permit reuse of the device in a clean environment includes applying a fluid having a single input pressure to a pressure differentiation device having first and second pressure control fittings for providing first and second differing pressure outputs in accordance with the single input pressure and transmitting the fluid at the first and second differing pressures from the pressure differentiation device to the internal passageways. The internal passageways are reprocessed with the transmitted fluid at the first and second differing pressures, whereby the internal passageways are reprocessed at differing pressures in accordance with the single input pressure.

Abstract: A chemical vapor deposition chamber has a vacuum exhaust line extending therefrom. Material is deposited over a first plurality of substrates within the deposition chamber under conditions effective to deposit effluent product over internal walls of the vacuum exhaust line. At least a portion of the vacuum exhaust line is isolated from the deposition chamber. While isolating, a cleaning fluid is flowed to the vacuum exhaust line effective to at least reduce thickness of the effluent product over the internal walls within the vacuum exhaust line from what it was prior to initiating said flowing. After said flowing, the portion of the vacuum exhaust line and the deposition chamber are provided in fluid communication with one another and material is deposited over a second plurality of substrates within the deposition chamber under conditions effective to deposit effluent product over internal walls of the vacuum exhaust line.

Abstract: A method of cleaning surfaces using a mixed phase cleaning mixture of an aqueous solution and a flow of gas sufficient to produce droplets of the liquid which are entrained by the gas for a time sufficient to clean tubing of various lengths and geometries and porous membranes to remove biofilm, debris and contaminants.

Abstract: A milking plant for milking animals, such as cows, wherein milk collecting means, prefeably in the form of teat cups, are attached to the teat of the animal whereafter milk is taken from the animal by use of vacuum. The milk is transported by a milk line system (31) to milks storage means comprising a cooling tank (30). For cleaning purposes the milk line system from each milk collecting means can be shut off from the milk tank by valve means (32) in order for separate cleaning of the milk line system. The invention is characterized by preventing any possible leakage of detergent from a cleaning fluid to the milk that has been collected in the milk tank, by providing a pressure difference between the two fluids. The pressure difference between the fluids is preferably achieved by connecting the cleaning fluid to the vacuum supply (4) of the milking plant.

Abstract: A method for the reprocessing of a device having internal passageways by applying a fluid at a plurality of pressures to the internal passageways of the device to permit reuse of the device in a clean environment includes applying a fluid having a single input pressure to a pressure differentiation device having first and second pressure control fittings for providing first and second differing pressure outputs in accordance with the single input pressure and transmitting the fluid at the first and second differing pressures from the pressure differentiation device to the internal passageways. The internal passageways are reprocessed with the transmitted fluid at the first and second differing pressures, whereby the internal passageways are reprocessed at differing pressures in accordance with the single input pressure.

Abstract: A metal-debris magnetic scavenging tool useable inside a buried, horizontal metallic pipeline through an access opening which has been cut into the upper wall portion of the pipeline overhead where the resulting debris has collected. A raiseable/lowerable and rotatable array of magnets, surface exposed, and operating moveably as a unit, agitate and collect debris principally within an area-footprint which allows for clearance lifting and removal of collected debris through the access opening.

Abstract: On-Line and Off-Line methods of simultaneously cleaning and disinfecting an industrial water system are described and claimed. The methods involve the addition to the water of the industrial water system of a Compound selected from the group consisting of the alkali salts of chlorite and chlorate and mixtures thereof; and an acid, followed by allowing the water in the industrial water system to circulate for several hours. The reaction of the alkali salts of chlorite and chlorate and acid produces chlorine dioxide in-situ in the water of the industrial water system. The chlorine dioxide kills microorganisms and the acid acts to remove deposits upon the water-contact surfaces of the equipment. An alternative method involves the use of a chelating agent and a biocide. Other possible cleaning and disinfection reagents may be added as needed including corrosion inhibitors, chelating agents, biocides, surfactants and reducing agents.

Abstract: An apparatus and process are described delivering alternating pulses of fluid and air within either a fully sealed or partially sealed tooling enclave in the direct presence of a constant or variable vacuum source for the purpose of removing loose as well as attached contamination from the part and it's associated internal passageways, as well as internal and external surface areas. The agitation of the debris is created by the displacement of the air or other gases, held under compression by the fluids when released to the vacuum source surrounding, affixed, or presented to the part/area to be cleaned. The fluid/air medium is generated in an alternating method by the use of a rotating pulse generator. The generator receives a constant or alternately a variable rate flow of fluid to be used in the application as well as a constant or alternately variable rate flow of compressed air.

Abstract: A method and a device for washing a drain pipe allowing a nozzle to be rotated along the inner peripheral surface of a pipe even in a lateral pipe, wherein the positions of a plurality of injection holes (10, 11, 12, and 13) formed in the nozzle (1) are formed and the amount of high pressure water jetted from each of the injection holes (10, 11, 12, and 13) are regulated so that the specific injection hole (10) only among the plurality of injection holes is set so as to be opposed always to the inner peripheral surface (5a) of the pipe.

Abstract: An automatic deliming process for a steam oven cooker is described. The process initiates a deliming procedure after a predetermined time of normal operation, which period of time is determined by the hardness of the water in the local area. Upon the expiration of this period of time a microprocessor signals an operator to shut down normal operation of the oven, and initiate the deliming process. The microprocessor then activates a peristaltic pump which injects a predetermined quantity of deliming liquid from an external reservoir into the generator. After the deliming time has passed and the generator contents have cooled to 140° F. the microprocessor automatically activates a drain pump to drain the deliming solution from the generator. Subsequently the microprocessor activates a fill-solenoid opening and inlet from a reservoir of rinse water into the generator to rinse the same. The microprocessor then again opens the drain to drain the rinse water, and normal operation is resumed.