Abstract: The invention relates to an arrangement in a vacuum sewer system, which comprises a sewer network having a sewage source and sewer piping adapted for receiving sewage from the sewage source. A liquid driven ejector device functions as a source of vacuum for the vacuum sewer system. In order to improve the efficiency of and to ensure the function of the ejector device, the ejector device forms a primary circuit, which is separated from a secondary circuit formed by the sewage collecting process.

Abstract: A portable suction device for removing liquid from an engine includes a plastic tank including a pump aperture for enabling removal of air or gases from the tank and a receiving aperture for receiving a liquid or gas from an engine. The suction device includes a pump apparatus for creating a negative pressure in the plastic tank. The pump apparatus includes a metal cylindrical tube, a plastic piston surrounded by the cylindrical tube, a metal piston rod having an end secured to the piston and a pump handle secured to the other end of the piston rod. A plastic support bracket supports a first end of the cylindrical tube adjacent the pump handle by securing the tube to a protrusion at a top end of the tank. A pump support cap receives the second end of the cylindrical tube for securing the tube at the pump aperture of the plastic tank. Due to the arrangement of the cylindrical tube above the plastic tank, the cylindrical tube functions as a portable suction device handle for carrying the plastic tank.

Abstract: A buffer box for use in a vacuum drainage system. The buffer box defines a reservoir of known effective size which provides substantially consistently sized slugs of liquid which may be efficiently pulled up a vertical lift. The buffer box includes an outlet and an air intake orifice which may be sized relative to one another so that only liquid from the reservoir is evacuated. The outlet has an upper edge which may be spaced from a base portion of the buffer box at a height which optimizes liquid velocity out of the box and defines a level above which only water is evacuated from the reservoir.

Abstract: Arrangement and method for the prevention of water entering a pneumatic controller of a vacuum sewer system through a breather line. The proposed pneumatic controller is a non-bleeding controller preventing continuous flow of air from the breather line through the controller. The volume of breather air entering the controller during an evacuation cycle is smaller than the volume of a water trap provided in the breather line. The water trap removes water from the breather air before it enters the controller.

Abstract: Liquid transfer apparatus transfers liquid between containers, and includes a liquid storage chamber having an inlet and an outlet; a pump chamber having an inlet and an outlet; a passage connecting the storage chamber outlet to the pump chamber inlet; a suction pump mechanism for sucking air from the storage chamber via the pump chamber inlet; and a valve for selectively opening and closing the inlet of the liquid storage chamber, allowing liquid to flow into the storage chamber upon suction being applied to the storage chamber by a pump and opening of the inlet. A carry case stores the liquid transfer apparatus and three different adaptors, which can be connected to an aperture of a container for use with a liquid transfer apparatus. One adaptor has a radially adjustable thread engaging components to enable the adaptor to be connected to different sized apertures.

Abstract: A vacuum transfer system for transferring food grade products. A biased ball in a cage with a substantially uninterrupted cage wall is utilized as a check valve. The ball may be biased by a weight to float in a predictable orientation relative to the cage. The biased ball assures that a certain portion of the ball will consistently engage with and aperture. The biased ball also minimizes chattering of the ball in the cage under high flow conditions.

Abstract: A system for servicing a fluid system can employ a pressure-reducing source to perform the desired service. The fluid system can be an engine cooling system or other fluid system.

Abstract: A liquid sucking and dispensing device includes a body having a passage and an air inlet and an air outlet are respectively located one two ends of the body. A first valve is engaged with the passage at a mediate section of the passage and a second valve is engaged with the passage at a second end of the body. An opening is defined radially through the body and communicates with the passage and an interior of a container. When the second valve closes the passage, pressurized air enters the container to push liquid in the container out from the container.

Abstract: This is a system and procedure that uses either a hand pump system or an electric pump system to drain fresh water or sea water out of a marine engine, and then uses either the hand pump system or the electric pump system to install fresh water or other liquid chemicals into the marine engine, and also uses either the hand pump system or the electric pump system to recover the liquid chemicals from the marine engine.

Abstract: A dual backflow check valve for use in a vacuum sewage system, wherein the check valve includes a valve body and a valve flap pivotally mounted inside the valve body, the valve body having a primary (branch) conduit and a secondary (service) conduit entering the primary conduit at an acute angle. The primary conduit has an upstream portion forming a primary inlet into the valve body and a downstream portion forming a primary outlet out of the valve body, and the secondary conduit forms a secondary inlet into the valve body. The valve flap is pivotable between two positions, a first position in which it prevents fluid from entering the secondary conduit and a second position in which it prevents fluid from entering the upstream portion of the primary conduit. Preferably, the primary conduit and the secondary conduit of the check valve are oriented in a substantially horizontal plane in the vacuum sewage system.

Abstract: A system for servicing a fluid system can employ a pressure-reducing source to perform the desired service. The fluid system can be an engine cooling system or other fluid system.

Abstract: Dispersibility of thickener is constant for every lot and viscosity difference is little. Fine bubbles existing in the thicker in ink follower are removed. A step of homogenizing the thickener at any temperature within a range of 40° C. to 130° C. is included. Preferably, a step of homogenizing the thickener at any temperature within a range of 100° C. to 130° C. is included.

Abstract: An apparatus and method of servicing fluid systems by draining, filling, or leak testing the fluid system can employ a pressure-reducing source to perform the desired service. The fluid system can be an engine cooling system or other fluid system.

Abstract: The invention relates to an arrangement in a vacuum sewer system, which comprises a sewer network having a sewage source and sewer piping adapted for receiving sewage from the sewage source. A liquid driven ejector device functions as a source of vacuum for the vacuum sewer system. In order to improve the efficiency of and to ensure the function of the ejector device, the ejector device forms a primary circuit, which is separated from a secondary circuit formed by the sewage collecting process.

Abstract: This invention relates to ink follower for a water-base ballpoint pen with its bubbles removed, time-dependent stability, less oil separation, and greatly reduced lot-to-lot viscosity difference and associated performance difference, and a method for manufacturing the same. After addition of thickener, the follower is made depressurized preferably at 0.2 atm or lower. Simultaneous heating and stirring are preferable. When the ink follower is solely debubbled in advance, fine bubbles contained in particulate silica, clay thickener, etc. can be very highly removed even if the centrifugal debubbling is not so strong and there is no bad affection to the writing property of the pen. It is also possible that, after adding the thickener, a centrifugal force greater than or equal to 200-fold of the gravitational acceleration is applied to debubble.

Abstract: A control apparatus for pneumatic evacuation and/or water valves, operated by vacuum pressure and used for a vacuum sewerage system, particularly for pneumatically operated sanitary appliances, such as vacuum closets, urinals or wash basins. The control apparatus comprises an activating element, such as a push button, which is integrated in a housing and moved relative to this housing against a force to operate a control valve which comprises a valve disc and a valve piston and transmits vacuum pressure from a vacuum source to the evacuation and water valves. A compact control apparatus is provided which prevents continuous transmittal of vacuum to the evacuation and water valves if the activating element is maloperated. The piston of the control valve is moved by a diaphragm separating a first and a second chamber within the housing. The first chamber is connectable through the first control valve to the evacuation and/or water valves and is connected to the vacuum source.

Abstract: A device having an extraction pipe that can be inserted into the bottom of the oil pan through the opening of the oil level dipstick tube of the engine until the end of the extraction pipe contacts the bottom of the oil pan. The lubricating oil in the oil pan is extracted by the suction pump of the device and is deposited into the reservoir via the pipe. The device of the present invention can remove the oil safely without splashing high temperature lubricating oil on the operator. Moreover, it can prevent the problems that occur when oil leaks out, when a person forgets to screw in the oil plug, or when a person damages the seal of the oil drain plug by tightening the drain plug too tight.

Abstract: An activator valve for providing a time temporary vacuum at an output port which is normally at atmospheric pressure. The timed vacuum is provided in response to an increase in air pressure in an interruptible vacuum chamber, such as that by briefly opening the valve between the outside of the valve and the interruptible vacuum chamber. When this pressure increases, a diaphragm holding a magnet moves downwardly attracting a ferro-magnetic disk upwardly. The ferro-magnetic disk opens a valve between the output port and a main vacuum source port. This causes a vacuum to be drawn at the output port, which in turn operates a remote device which the activator valve is controlling. When the source of outside air to the interruptible vacuum chamber is closed the outside air is then drawn from the interruptible vacuum chamber, causing the magnet to once again rise and release the ferro-magnetic member, closing the valve between the main source of vacuum and the output port.

Abstract: A buffer box for use in a vacuum drainage system. The buffer box defines a reservoir of known effective size which provides substantially consistently sized slugs of liquid which may be efficiently pulled up a vertical lift. The buffer box includes an outlet and an air intake orifice which may be sized relative to one another so that only liquid from the reservoir is evacuated. The outlet has an upper edge which may be spaced from a base portion of the buffer box at a height which optimizes liquid velocity out of the box and defines a level above which only water is evacuated from the reservoir.

Abstract: The present invention is an apparatus for the transfer of fluid or fuel, including, in one embodiment a container where a flexible tube is associated with a first opening in the container and where a vacuum pump is associated with a second opening in the container. The vacuum pump, a manually operated device, is suitable for creating a vacuum within the container so as to initiate the flow of liquid through a siphoning tube. Furthermore, the vacuum pump is an inexpensive design and is not directly exposed to the liquid being siphoned or stored within the container. Another embodiment of the present invention is directed to the method of using a diverter and an end-weighted siphon tube, operatively connected to a vacuum source, in order to more easily transfer liquid from an enclosed reservoir.

Abstract: A vacuum drainage system having a vertical riser with an aeration point. The aeration point prevents stalls in the vacuum drainage system by breaking up the formation of a solid fluid column in the riser. In certain applications, the aeration point allows the vacuum drainage system to operate in a deliberately flooded condition by regulating air flow into the riser. The aeration point may be provided simply as a hole positions at an optimum height above a bottom of the riser, or it may include apparatus for retaining fluid inside the riser, such as a check valve. In addition, the aeration point may be provided with an automatically adjustable cross-section, so that aeration point is quickly and easily adapted to changing operating parameters in the vacuum drainage system.

Abstract: In a vacuum-operated sewage system, a vacuum sewage pipe (31) evacuated inside to a vacuum state is connected to a sewage suction pipe (15) via a vacuum valve (14) operated by the vacuum in the vacuum sewage pipe (31). While the vacuum valve (14) is open, sewage accumulated in a sewage tank (11) is sucked through the sewage suction pipe (15) into the vacuum sewage pipe (31). An air inlet valve (20) is connected in the neighborhood of the vacuum valve (14) and between the vacuum valve (14) and the vacuum sewage pipe (31), and operated by the vacuum in the vacuum sewage pipe (31). When the degree of vacuum drops in the vacuum sewage pipe (31), the air inlet valve (20) is allowed to open and supply air into the vacuum sewage pipe (31).

Abstract: A waste fluid discharge column for use in a vacuum drainage system. The discharge column comprises a vertical pipe maintained under negative pressure to create a liquid column inside the vertical pipe. A chamber is attached to an upper end of the pipe and defines a vacuum port and a fluid inlet port. The chamber allows for better separation of waste fluid and air, and provides a vacuum buffer for the drainage system. The present invention further comprises a vacuum drainage system capable of separately handling multiple waste fluid flows. Two or more waste fluid discharge columns may be connected to a single vacuum source. Because the different types of waste fluid are handled separately, treatment and other auxiliary apparatus needed for certain types of waste fluid may be sized properly since the vacuum drainage system may direct only the waste fluid requiring treatment to the auxiliary apparatus.

Abstract: A coolant draining tool has a thermally insulating handle with a passageway therethrough. A curved drain tube is connected to the passageway and has an end portion with plurality of apertures for insertion into the cooling system of a motor vehicle. A hose coupling also is connected to the passageway for attaching the tool to a suction device to draw coolant from the cooling system.

Abstract: A modular vacuum drainage system is provided which facilitates quick and easy installation in a building. The system includes a vacuum central housed in an enclosure and having interface connections located adjacent to a periphery of the enclosure to allow immediate access thereto. The vacuum central is sized to fit through standard doorway sizes, and is preferably housed in a soundproof enclosure so that the vacuum central may be installed in a room without requiring a separate mechanical room. The enclosure may be decorated to match the decor of the office, thereby providing an aesthetically pleasing appearance. A modular plumbing fixture is also provided which may be pre-fabricated off-site. The modular plumbing fixture is provided in a housing and has water and vacuum pipe inlets accessible from outside of the housing to facilitate connection to the vacuum central.

Abstract: A fluid change system (10) for use in changing fluid, i.e. motor oil from machinery. The system has a portable "suitcase" unit (12) and a unit (14) for recharging the suitcase unit. The suitcase unit (12) has a used fluid tank (22) for collecting and storing used fluid under vacuum, a new fluid tank (20) for storing and delivering new fluid, and a compressed air tank (18). A four-way valve (56) controls the inflow of used fluid into and new fluid out of the suitcase unit (12). The suitcase unit (12) has recharge ports (58, 60, 62, 64, and 66) through which the new fluid tank (20) will be refilled with new fluid and recharged with pressurized inert gas, the used fluid tank (22) will be emptied of used fluid and placed under a vacuum, and the compressed air tank (18) will be refilled with compressed air. A venturi operable by air from the compressed air tank (18) permits the user to put extra vacuum on the used fluid tank (22) as the need arises.

Abstract: An apparatus for recovering coolant from a motor vehicle includes an inlet tube with a sharply pointed end for penetrating a wall of a hose of the vehicle cooling system. The inlet tube is connected to an inlet of a closed container. An outlet of the closed container is coupled to a suction port of a venturi that also has a fluid inlet for attachment to a source of a pressurized fluid, and a fluid outlet. The flow of fluid from the fluid inlet to the fluid outlet creates a suction at the suction port which draws coolant from the cooling system of a vehicle into the closed container. A muffler is provided at output from the venturi to reduce noise produced by fluid flowing form that output. Specific structures for the venturi and the muffler are disclosed.

Abstract: An automatic vacuum isolation valve network for use in a vacuum collection system having at least two branches connected to a main vacuum pipe maintained under negative pressure. The network includes a first valve located in each branch adapted to close in response to vacuum loss in the main vacuum pipe, thereby preserving a vacuum level in the associated branch. The network further includes a shut-off valve located in each branch upstream of the first valve, the shut-off valve adapted to close in response to vacuum loss in an upstream portion of a branch. The shut-off valve thereby isolates a broken branch, and allows a remainder of the vacuum collection system to return to normal operation. The isolation valve network further facilitates location of a breach in the vacuum collection system by rendering a faulty branch inoperable, thereby identifying the immediate vicinity of the breach.

Abstract: A method for expansion control in a closed fluid circulation system with varying temperature, in which system air is drawn from the circulating fluid through the formation of an air head wherein air to be withdrawn is collected and from which air can be blown off, controlled by a valve, to the environment or a receiving space, while further off, measures are taken for taking up, when the temperature varies, an attendant expansion and shrinking of the fluid within the closed system, and measures for enabling adding fluid to the system, which fluid is withdrawn from an external stock of fluid under pressure, and the air head volume is measured and when a predetermined value is exceeded, a fluid valve is opened through which fluid is introduced into the air head until the volume of the air head is substantially equal to the predetermined value and the fluid valve is closed.

Abstract: A high Cv bulk process valve, control system and method convey a process gas or liquid for manufacturing semiconductors through a fluid passage. The fluid passage contains an aerodynamically shaped expansion chamber within which a valve seat and a moveable poppet are arranged for opening and closing the fluid passage. The aerodynamically shaped expansion chamber includes a conically expanding entry and a conically contracting exit and is shaped such that the resistance to flow of the process gas or liquid through the fluid passage of the valve is very nearly the same as through a straight tubing having a cross-sectional area of an inlet to the valve and a length of the fluid passage through the valve. The valve can be added or subtracted from a gas or liquid control system with virtually no changes in pressure drop of flow restriction, when the valve is in the open position. The valve minimizes the energy consumed by valves in semiconductor gas systems.

Abstract: A valve for relieving an excess negative pressure condition inside a medical device comprising a diaphragm with an inner periphery and an outer periphery and an actuator having a piston extending axially therefrom which is inserted through the inner periphery of the diaphragm. The piston comprises a plurality of legs that form a void therebetween at the free end thereof. The outer periphery of the diaphragm is sandwiched between the upper and lower housings so as to create a hermetic seal that separates the valve into a venting side and a suction side. To relieve an excess negative pressure condition the diaphragm is operable in one of two positions. In the first position, a biasing members forces the inner periphery of the diaphragm in sealing engagement around the circumference of the piston so that a hermetic seal is maintained between the suction side and the venting side.

Abstract: The present invention discloses a liquid dispensing system and a method for dispensing liquid that includes two hermetically sealed tanks each having a liquid container with a conduit pipe connecting the two containers. A differential pressure exists between the two tanks such that a process liquid can be fed from the second container into a dispensing nozzle under the differential pressure and the gravity of the liquid without the need of a pumping system. The problems of gel formation normally observed in conventional dispensing systems can be eliminated. A high viscosity, short shelf life liquid can be most suitably dispensed by the present invention novel dispensing system and method.

Abstract: A sewage by-pass discharging apparatus for sewage pipe works comprises an upstream side stop cock disposed at an upstream side of a sewage pipe laid in a working area, a downstream side stop cock disposed at a downstream side of the sewage pipe laid in the working area, a member for discharging the sewage accumulated at an upstream side from the upstream side stop cock to a downstream side from the downstream sides stop cock by bypassing the sewage pipe, a drain pipe connected to the sewage pipe laid in the working area, a drain pit connected to the drain pipe, a stop cock for preventing the sewage from flowing from the drain pit into the drain pipe, and a unit discharging the sewage reserved in the drain pit to downstream side from the downstream side stop cock. According to this structure, the working to the sewage pipe can be performed while the sewage system is maintained in a state of being utilized as usual by the residents of the respective homes.

Abstract: A device for disposal of liquid media such as coolant and lubricant fluids, containing production residues, such as chips from industrial processes in which these media are conveyed from at least one accumulation site through gutters and/or pipes to a recycling container. The media are conveyed from the recycling container through a pipe connected thereto close to the bottom to at least one collecting tank. The device is also intended to convey foamed media from the recycling container to the collecting tank at limited equipment cost. The recycling container is divided by a pressure-tight partition containing an operable valve into an upper supply chamber and a lower delivery chamber. A compressed air line with a switchable compressed air inlet valve and a vent line with a switchable vent valve are connected to the upper area of the delivery chamber.

Abstract: A mobile media dispensing apparatus in the form of a portable cart which has a plurality of vessels. The apparatus of this invention is to simultaneously deliver to testing vessels of a separate dissolution test apparatus an identical volume of a preheated, filtered, deaerated media within three minutes of time. The media of each vessel is to be used by depositing a pill therein with the dissolution rate to be determined of the pill within the media of each vessel.

Abstract: An internal breathing system for a vacuum interface valve in a vacuum sewage system uses a vent port arranged in a partition between a remotely vented sump and a valve chamber for the vacuum interface valve located above the sump. A float valve normally opens the vent port to admit approximately atmospheric pressure air from the sump to the valve chamber, and the float valve closes the vent port if a mishap causes sewage to rise high enough to float the valve. Conduits preferably provide breathing communication for the vacuum interface valve and its controller from a region high in the valve chamber to avoid accidental transmission of sewage or condensate.

Abstract: A method and apparatus for automatically collecting and exhausting drainage discharged from a semiconductor fabrication system, including a drainage collector for storing drainage discharged from the semiconductor fabrication system, a drainage tank for storing the drainage output from the drain collector, and a liquid separator provided between the drainage collector and the drainage tank. The drainage collector receives and stores the drainage output from the drain collector. The liquid separator, provided between the drainage collector and the drainage tank, receives and stores the drainage output from the drainage collector under a first condition in accordance with a difference between a vacuum pressure and the atmospheric pressure, and allows the drainage stored in the drainage collector to flow into the drainage tank in a second condition based on a difference between the vacuum pressure and atmospheric pressure.

Abstract: A conventional recreation vehicle or caravan toilet, which normally is connected by a simple slide valve to a holding tank mounted below it, can be easily converted to a vacuum toilet at a campground or like stationary site. The holding tank is slid out of the compartment in which it is mounted below the toilet of the recreation vehicle or caravan, and a vacuum adaptor is slid into its place, making a substantially airtight connection with the toilet. The vacuum adaptor is connected up to a substantially stationary vacuum source, such as a below ground vacuum tank at a campground. The vacuum adaptor is preferably connected by a dripless connection to the vacuum source, and includes an arcuately shaped movable valve element that is rotatable about a substantially horizontal axis from a substantially airtight closed position, to an open position, when the toilet is flushed.

Abstract: A suction canister particularly suitable for the collection of waste fluids from a medical patient including an open-top receptacle and a lid adapted to close the open-top of the receptacle. The receptacle and lid are each readily and inexpensively moldable from plastic materials employing existing molding techniques and facilities. The outer rim of the open top of the receptacle and the peripheral margin of the lid are adapted to provide engagement of the lid with the rim of the receptacle, such engagement providing a positive and readily identifiable limit of the extent of the engagement that provides a certain sealing of the id with the receptacle rim, and resulting in an interlocking of the lid with the receptacle as prevents removal of the lid from the receptacle other than by destructive force applied to the lid and/or receptacle.

Abstract: A vacuum tank assembly has a low volume configuration so that it can be used in boats and recreational vehicles where space is at a premium. A stack of components, with a waste tank at the bottom, then a vacuum tank with directly connected vacuum pump, and one or more fresh water tanks, is located remote from a vacuum toilet, with a discharge from the toilet (below a vacuum-tight ball valve) connected to the vacuum tank, which is in turn connected to the vacuum pump, in turn connected to the waste tank. A submersible centrifugal pump may be provided mounted to a cap of the water tank, with an anti-siphon device associated with it. The vacuum tank is of high density polypropylene having flat walls, with no continuous flat surface more than 80 square inches. Lipless duckbill check valves are provided on opposite sides of the vacuum pump, the valves of elastomeric material having a ratio of the wall thickness to thickness of the sealing edges of about 1:1.

Abstract: The unpleasant task of manually removing a sewage holding tank from a recreation vehicle at a campground, and emptying it, is avoided by operatively connecting the RV sewage system to a stationary (preferably underground) vacuum installation at the campground. While the RV is renting space at the campground it is connected to an above ground vacuum hookup (typically including a conduit and a shut-off valve, and usually also a flexible hose with a dripless free end connection), at a campsite. The hookup is, in turn, connected to at least one underground vacuum source. The vacuum source may be a vacuum pump connected to a number of vacuum tanks (one for each hookup), with a check valve (e. g. duckbill valve) isolating each vacuum tank from the others. Alternatively, the vacuum source may be a vacuum generator connected to each hookup, and a common gravity sewer pipe connected to all of the vacuum generators.

Abstract: A vacuum valve includes a housing having an operating chamber, a plunger provided in the housing; and a self-lubricating rolling diaphragm provided between the plunger and the housing. The rolling diaphragm may have a tapered form. A vacuum valve further includes a valve rod connected to the plunger and penetrating the housing to connect with a valve body. A self-lubricating shaft seal comes into contact with the valve rod to provide an airtight seal between the housing and the valve rod.

Abstract: A vacuum valve controller for a vacuum sewer system having a suction pipe which is communicated with a vacuum system by opening a vacuum valve, and which is cut off from the vacuum system by closing the vacuum valve, so that soil water in a soil water basin is sucked through the suction pipe and sent to a predetermined place by opening said vacuum valve is disclosed.

Abstract: Defects, associated with the presence of microbubbles in the photoresist developer solution, have been largely eliminated by providing an apparatus and method whereby the photoresist developer solution, while on standby status in a buffer tank, is maintained at a negative pressure (about minus 0.5 kg/cm.sup.2). This allows any microbubbles, that were introduced into the solution during the course of conveying it to the buffer, to escape. The negative pressure in the buffer during its refill and standby stages is generated by adding a venturi valve to the existing equipment. This keeps the impact on the control software to a minimum and has little or no effect on the cost of the process.

Abstract: A vacuum transfer method and system for transferring liquid food grade product vacuum transfer system for transferring liquid food grade product into and from a vessel. The vessel has at least one product inlet/outlet. The vacuum transfer system includes a selectively activatable vacuum source. A vacuum transfer unit is in fluid communication with the vacuum source and with the vessel. Valves are operably coupled to the vacuum source and the vacuum transfer unit for selectively (a) pressurizing the tank and (b) drawing a vacuum in the tank, whereby drawing a vacuum by the vacuum source in the vessel acts to draw the liquid food grade product into the vessel through the at least one product inlet/outlet and pressurizing the vessel acts to expel the liquid food grade product from the vessel through the at least one product inlet/outlet.

Abstract: A valve particularly for vacuum drainage systems, comprising a valve housing (1) with an inlet (2), a through-flow part (11) and an outlet (3), and a device with an actuator for the opening and closing of the valve. The opening and closing device is a movable valve body (4) with a, relative to its axis, slightly inclined first sealing face stretching along the periphery of the valve body (4) up to a basically circular and, relative to the flow direction through the valve, vertical part comprising a second sealing face. The first sealing face is provided to rest against a corresponding inclined seat (16) being disposed on a projection in the valve housing and which seat is situated beyond the inner wall (36) of the through-flow part (11), and that the second sealing face is provided to be tightly resting against a corresponding circular, upper part (17) in the valve housing.

Abstract: Apparatus for the delivery of a chemical slurry to at least one downstream facility. The apparatus comprises a measuring vessel of predetermined volume into which a liquid chemical component is introduced. A conduit connects the measuring vessel to multiple chemical sources, wherein each of said chemical sources comprises a liquid chemical component. Another conduit connects the measuring vessel to at least one mix tank. A pressure-vacuum vessel is in communication with said at least one mix tank, whereby chemical is drawn from said at least one mix tank to the pressure-vacuum vessel under negative pressure and chemical is delivered from the pressure-vacuum vessel to said at least one downstream facility under positive pressure. The pressure-vacuum vessel is in fluid communication with both said at least one mix tank and said at least one downstream facility. Valves on each of the conduits control the chemical flow therethrough.

Abstract: An apparatus and method of use thereof includes a rechargeable, pre-charged vacuum canister used to remove viscous fluids, e.g., waste oil, from containers such as engine crankcases through an opening, such as a dipstick tube. The self-contained canister is first pre-charged with a near absolute vacuum. Due to the compressibility characteristics of air, conventional, active, continuous pumping techniques, which rely on partial vacuums, do not achieve the pulling force of the near absolute vacuums achieved by the invention. The use of a self-contained, pre-charged near absolute vacuum canister system significantly increases the force applied to the viscous fluid to be extracted. Furthermore, the fluid can be simultaneously contained in a proper disposal container. As a result shortcomings of manual and electric pumping systems are overcome with the added advantage that no external pumping force is required at the site of fluid removal.

Abstract: A liquid flow control apparatus (5) suitable for handling milk from a milking machine, comprising a first chamber (10) that comprises an inlet (11) for the milk, an outlet (12) for connecting to a vacuum pump, and an outlet (14) for the milk to flow by gravity to a second chamber (13). The first chamber (10) and the second chamber (13) are in communication with each other by means of the outlet (14) at the bottom of the first chamber (10). The second chamber (13) has a float valve (23) that closes off communication between the first chamber (10) and the second chamber (13) depending on the level of liquid in the second chamber (13). A conduit tube (18) for air communication is disposed between the first chamber (10) and the second chamber (13). A second float valve (17b) closes off communication via the conduit tube (18) between the two chambers. A third chamber (21) has two valves with one valve (26) opening to the atmosphere and a second valve (20) opening to the second chamber (13).

Abstract: The present invention concerns a vacuum sewerage system for collecting wastewater from a number of buildings comprising a vacuum sewer which is on one end connectable to a vacuum source and into which wastewater from the buildings can be aspirated via interphase valves. The vacuum sewer has a height profile comprising a sequence of low and high points, whereby wastewater can accumulate at the low points while the system is at rest. If air flows, the wastewater accumulations are pushed from the low points over the subsequent high points. The invention proposes to provide first and a second sections of the vacuum sewer with different height profiles. The height profiles are such that the maximum volume of the wastewater accumulations at the low points of height profile I is by preferably at least 3 times smaller than the maximum volume of the wastewater accumulations in height profile II.