Abstract: The invention relates to a device for equalizing the hot water and cold water pressures in a hot water faucet for sanitary use comprising, upstream from a thermostatic unit (200); a moving element (108) constituted by a membrane (109) whose plane determines the plane of symmetry of the chambers and a control rod (110) passing through the membrane (109) at its center, to which rod said membrane is attached, valves (111, 112) mounted on each of the two ends of the common control rod, which cooperate with seats (113, 114), means (115, 116) for translationally guiding the control rod, a nonreturn valve (117, 118) installed in each of the inlets of the chambers. This device is characterized in that the guiding means (115, 116) are located at each of the ends of the control rod and have guiding surfaces smaller than the cross section of the valve and/or the control rod.

Abstract: A marine engine cooling system is provided with a valve in which a ball moves freely within a cavity formed within the valve. Pressurized water, from a sea pump, causes the ball to block fluid flow through the cavity and forces pumped water to flow through a preferred conduit which may include a heat exchanger. When the sea pump is inoperative, the ball moves downward within the cavity to unblock a drain passage and allow water to drain from the heat generating components of the marine engine.

Abstract: A bathtub plumbing system including a hand-held shower controlled by a compact pressure balanced, volume and temperature controlled mixing valve. The pressure-balancing valve is installed in a bathtub plumbing set having a hand-held shower accessory. The pressure balancing valve receives hot and cold water from hand-held shower water feed pipes coupled to the main hot and cold water inlet pipes, respectively, located upstream of the respective hot and cold water control valves used to supply water to the main faucet. The hand-held shower hot and cold feed pipes are each hydraulically connected to a first respective hot and cold water inlet of a compact pressure-balancing valve. The hand-held shower is hydraulically connected to the outlet of the pressure-balancing valve by a flexible hose. Hot and cold water entering the pressure-balancing valve is mixed therein independently of the hot and cold water supplied to the faucet.

Abstract: Systems and methods are described for multiple block sequential memory management. A method includes: partitioning a block of memory into a plurality of shared memory segments; and providing a processor with accessibility to each of the plurality of shared memory segments. An apparatus includes: a computer system; a block of memory including a plurality of shared memory segments; and a processor.

Abstract: The invention relates to a level control arrangement for vehicles having air springs (6a) to (6d) and a pneumatically controllable directional valve (26). A residual pressure holding function and an overpressure function are integrated into the directional valve (26). The directional valve (26) is controlled by the air pressure in the air springs (6a) to (6d). The air pressure can be applied via a control line (20) to a control input (24) of the directional valve (26). The air from the air springs (6a) to (6d) is released with the aid of the venting line (28). The venting line (28) is guided separately from the control line (20) through the directional valve (26). In this way, a large air flow can be conducted through the venting line (28) without the static air pressure in the control space (50) of the directional valve (26) being reduced. The venting line is blocked by a stepped piston (44) of the directional valve when no air is to be released from the air springs.

Abstract: A faucet includes a main body and a switch knob. The main body has a cold water connector, a hot water connector, and a balancing valve member. The switch knob is disposed at the junction of the two water connectors. The two water connectors are provided with a neck portion to accommodate the balancing valve member which is formed of an urging rod, two push seats fastened to the urging rod, and two rolling balls. The cold water flow and the hot water flow are regulated by the balancing valve member.

Abstract: A water faucet control valve comprises a valve and a control section seating in an oval mixed chamber of the valve. The valve comprises a pair of studs next to the chamber. The valve has an outlet for cold-hot-mixed water to flow there through. A pair of pin holes are formed next to the water outlet. The cold-hot water control section comprises a left and a right cups being isolated by a partitioner and a mobile axle. The left and right cups are in semi-circular post shape, each has a hole for the partitioner and the mobile axle to insert therein. Both the left and right cups, the partitioner, the mobile axle have separated cold and hot water passages, this has reduced the cost of manufacture and more feasibility.

Abstract: An improved the velocity fuse valve controls communication between first and second brake valves and first and second brake lines. The velocity fuse valve includes a valve housing having a valve bore which slidably receives a valve spool. The spool moves in response to pressure in first and second pilot chambers, each communicated with a corresponding first and second outlet. The first pilot chamber is communicated with the first outlet via a first dashpot passage and a first orifice, and the second pilot chamber is communicated with the second outlet via a second dashpot passage and a second orifice. The orifices reduce or control how fast the spool will move in response to the pressure differential between the pilot chambers.

Abstract: A method of detecting a break in a transfer line transporting a fluid product between a first vessel and a second vessel includes sensing a current pressure of fluid product associated with the transfer line. A highest sensed pressure of the fluid product is continually tracked, and a trip pressure is defined. The trip pressure increases to new multiple value(s) at any or many of a possible multiple number of times when the highest sensed pressure increases. The method further includes detecting when the current sensed pressure drops below the trip pressure to detect a break in the transfer line, via use of a pressure sensor in or in fluid communication with the transfer line. A method of automatically shutting off transfer of fluid product between a first vessel and a second vessel includes a step for shutting off the transfer of fluid product between the first vessel and the second vessel.

Abstract: An improved pressure balance device for use in a faucet is made up of a pair of symmetric semi-cylindrical units and a tubular water inlet cap. Each semi-cylindrical unit has a semi-circular cross section and on each edge of the vertical face thereof is disposed a locking protrusion and a retaining recess at the middle position thereof respectively. Under the locking protrusion and the retaining recess is disposed a radially extended lug respectively. At the central position of the arc peripheral surface of each semi-cylindrical unit is placed a wedge-shaped locking latch. The tubular water inlet cap is provided with two symmetric inverted U-shaped engagement recesses at the bottom rim thereof and right between the two engagement recesses, in either direction, is disposed a retaining hole whereby the water inlet cap can be snapped into engagement with the two assembled semi-cylindrical units and be locked integrally together with ease and speed.

Abstract: An improved structure of the cold and hot water mixing valve of a balance valve is disclosed. Sealing trenches are installed on the upper surface of the concave portion on the lower wall of the mixing valve gate body and the lower surface of the balance valve cover plate along the water through holes and with a proper distance to the periphery of the upper and lower seats of the balance valve. A balance valve sealing is placed between the two sealing trenches. Sealing trenches are installed on upper surface of the balance valve cover plate and the lower surface of a fixing disk with a proper distance along the periphery of the water through holes. The depths of the sealing trenches are slightly smaller the radii of the cross section of the sealing ring strip for sealing. Therefore, the sealing can be assembled easily. After assembling, the sealing ring strip is positioned steadily. A preferred sealing effect can be derived easily.

Abstract: A mixing valve includes a housing having two inlets for receiving cold water and hot water. A valve member is secured in the housing and includes a membrane that may be easily secured between two casings. A valve stem is slidably engaged in the casings and has a middle portion secured to the membrane. The valve stem has two valve elements for engaging with the valve seats of the casings and for blocking the hot water when the cold water is not supplied to the housing. One or more control valves may be exchangeably secured to the valve member.

Abstract: A proportional fluid injector apparatus utilizing foaming agents. A pump is connected to a foaming agent and is operably connected to a differential proportional valve having a venturi. A first diaphragm control valve is operably connected between the pump and the venturi. A second diaphragm control valve is operably connected between the downstream and upstream sides of the pump and is also connected to a pilot line connected upstream of the venturi. The spring pressure exerted on the diaphragm in the first control valve is such that excess fluid from the pump returns upstream of the pump when the downstream pressure in the pump exceeds a predetermined value.

Abstract: An assembling structure for balance valve of cold/hot water mixing valve. The assembling structure includes a mixing valve cartridge a bottom wall of which is formed with a lower balance valve cavity above the cold and hot water incoming holes thereof, and a circular balance valve cover board formed with cold and hot water incoming holes and mixing water outgoing hole corresponding to the water holes of the cartridge. A lower surface of the balance valve cover board is formed with an upper balance valve cavity at the cold and hot water incoming holes thereof. The lower surface of the balance valve cover board is further formed with a sealing groove along the edges of the mixing water outgoing hole and the upper balance valve cavity. When the balance valve cover board is fixedly rested on the upper surface of the bottom wall of the cartridge, the cover board via a balance valve seal is sealedly positioned in the sealing groove and pressed by the bottom wall of the cartridge.

Abstract: An improved pressure balancer is mounted to a water inlet passage of a mixing faucet. Its improvement is characterized by the adoption of a mixing chamber, defined at one end of a valve control shaft, in which a plurality of upright turbulence rods are disposed, and a pair of identical silencing screens that are fit in the mixing chamber at the same time so as to effectively reduce the operational noise of a faucet. Moreover, a threaded flange is provided next to the rubber diaphragm on a balance rod to allow a compression nut to be mounted to the balance rod with one side thereof in abutment against the diaphragm. Thus, the diaphragm can be protected from being overturned inside out as a result of excessive water pressure applied to the diaphragm in operation.

Abstract: An assembling structure for balance valve of cold/hot water mixing valve, which includes a balance valve shade board for assembling a water pressure balance valve with the bottom of the mixing valve. A lower surface of the bottom wall of the mixing valve cartridge is formed with an upper balance valve cavity near the cold and hot water incoming holes. Two sides of the bottom wall of the cartridge are formed with latch holes. The balance valve shade board are also formed with a cold and a hot water incoming holes and a mixing water outgoing hole. An upper surface of the balance valve shade board is formed with a lower balance valve cavity near the cold and hot water incoming holes. The upper surface of the balance valve shade board is further formed with a sealing groove along the edges of the mixing water outgoing hole and the lower balance valve cavity. Two sides of the edge of the shade board are disposed with upward extending resilient latch hooks.

Abstract: A flush valve is provided which used only one moving component. A ball is used to seal either a first or second inlet when the other inlet is used to cause water to flow through the valve. The valve allows fresh water to be introduced into a second inlet in order to remove residue and debris from the cooling system from the marine propulsion engine. When fresh water is introduced into a second inlet, the ball seals the first inlet and causes the fresh water to flow through the engine cooling system. When in normal use, water flows through the first inlet and seals the second inlet by causing the ball to move against a ball seat at the second inlet. Optionally, a stationary sealing device can be provided within the second inlet and a bypass channel can be provided to allow water to flow past the ball when the ball is moved against the ball seat at the first inlet.

Abstract: A balancing valve assembly of a cold and hot water mixing valve including a mixing valve casing having a bottom wall provided with a depression for receiving a balancing valve cover plate. Cold and hot water inlets are provided in the depression, and a balancing valve lower cavity is disposed above the cold and hot water inlets. A balancing valve upper cavity is provided below cold and hot water inlets on the balancing valve cover plate. A washer is disposed between the mixing valve casing and the balancing valve cover plate when coupled so that the balancing valve lower cavity of the casing and the balancing valve upper cavity of the balancing valve cover plate together form a leakage-free space in which a balancing valve body may be secured, thus achieving a structure that is simple and quick to assemble and remains secured alter assembly.

Abstract: A fluid flow controlling device having a working member capable of reciprocating in a tubular case. The working member comprises a pressure detecting portion to detect the pressure of a second fluid, which flows into the tubular case through a second inlet, and to move the working member forwards; and a valve element to decrease the opening of the first outlet in relation to the opening of the first inlet, through which the first fluid is led into the tubular case, in correspondence with the displacement of the working member. By the use of the above fluid flow controlling device, it becomes easy to control the quantity of the first fluid led into the tubular case in relation to that of the second fluid, and it becomes possible to sufficiently supplying the first fluid to the tubular case even when the second fluid is exhausted and cannot be supplied any more so long as the first fluid is not exhausted.

Abstract: A fuel equalizing method and system for equalizing the amount of fuel in a plurality of fuel tanks connected to a motor, such as the diesel engine of a truck, is described. The system includes an equalization valve having a first common passage with two fuel inlets connected to two fuel tanks and a fuel outlet connected to the motor. A valve actuator member is mounted in the first common passage for longitudinal sliding movement in response to unequal fuel pressure in the two fuel inlets sensed by two fuel pressure sensing elements, which may be spherical balls, connected to the actuator member. A second common passage is provided in the equalization valve with a return fuel inlet connected to the excess fuel outlet of the motor, and two return fuel outlets connected to the two fuel tanks.

Abstract: A faucet system includes a cold water control valve and a hot water control valve. These control valves are in communication with each other through a cold water supply conduit and a mixed water conduit. The hot water control valve includes a needle valve and a valve seat. The needle valve is adjustable with respect to the valve seat to adjust the maximum temperature of hot water being supplied by the hot water control valve to the mixed water conduit. In one embodiment, the hot water control valve of the faucet system further includes a pressure balancer disposed between the hot and cold water supply and the hot and cold control valves.

Abstract: A pressure balance or proportioning valve which comprises a disk-shaped mobile unit (10) having a pair of cylindrical shells (12) extending from each side of the mobile unit (10) which is axially movable in a bore (2) of a housing which contains hot and cold water inlet (5) and outlet (3, 4) pipes. The housing includes hot and cold water outlet pipes (3, 4), a cold water inlet (5) or supply pipe in one end of the bore, and a hot water inlet (5) or supply pipe at the other and opposite end of the bore. The hot and cold water supply pipes terminate in end walls (7) and have cylindrical side walls (13) adjacent the end walls with openings (14) extending radially through the cylindrical side walls (13). The mobile unit (10) is disposed intermediate the end walls (7) and moves axially, in response to unequal water pressure, in the bore between the end walls (7).

Abstract: A ratio mixing valve for mixing first and second fluids in a constant volumetric ratio regardless of variations of supply pressures of the two fluids. The valve has an inlet passage for the first fluid that passes through a spool valve chamber, and an inlet passage for the second fluid that also passes through the spool valve chamber. Vent passages connect the two fluid passages to the ends of the spool valve chamber. The spool valve has a pair of annular grooves aligned with the two inlet passages. One groove partially blocks one of the inlet passages to form a variable orifice that responds to pressure changes in the incoming fluids by moving the spool valve to a position which adjusts the volumetric flow through the two passages to maintain a constant ratio between the fluids in the mixture.

Abstract: Piston-type device to regulate pressure in mixing valves, advantageously of the cartridge type, comprising at least an outer containing body (11) with separate inlet holes (15a, 15b) and outlet holes (21a, 21b) for hot and cold water and containing inside a floating piston with apertures on the circumference which can be associated in a variable manner with the inlet holes (15a, 15b), the lateral contact surfaces of the floating piston (14) on the two sides being defined by ribs (19) obtained radially on the outer containing body (11) and extending towards the inside of the regulator device (10), the ribs (19) defining a contact surface at least reduced in relation to the front surface of the floating piston (14).

Abstract: A burnproof device of triple/double switch combination faucet, including a faucet main body having an L-shaped cold water inlet switch seat and an L-shaped hot water inlet switch seat on two sides. A communicating tube inward extends from the side of each of the cold and hot water inlet switch seats. A center of the main body is disposed with a controlling switch seat for controlling the discharging of the water from downward spout or upward sprinkler. The communicating tube communicates the cold and hot water inlet switch seats with the controlling switch seat. A switch is disposed at a transverse tube opening of each of the cold and hot water inlet switch seats for controlling the water to flow from the longitudinal inlet into the center of the main body and mix therein. The controlling switch of the controlling switch seat is used to control whether the water should be discharged from the spout or the sprinkler.

Abstract: A direct contact steam injection heater allows shear to be adjusted without taking the process off-line to relieve pressure within the heater. A stud is mounted to an adjustable combining tube within the heater. The stud extends through an opening in the heater body into a sealed housing. An adjusting mechanism exerts force on the combining tube stud within the sealed housing to move the combining tube longitudinally within the body to adjust the shear within the heater. The position of the combining tube is indicated by an analog revolution counter. The adjusting mechanism can be driven manually or by a motor. The motorized embodiment of the invention can be used with feedback control to automatically optimize shear.

Abstract: A pressure balancer structure for water passage of combination faucet mainly including a balancing rod and a balancing membrane. The balancing rod and the balancing membrane can smoothly perform pressure balancing operation and the balancing membrane can be stably secured on the balancing rod. The balancing membrane is planely concaved toward the hot or cold water pressurized face so that the balancing rod can be concentrically axially accurately displaced.

Abstract: A hydraulic device for a moving contact piece of a high-voltage power circuit breaker includes a reservoir and a low-pressure tank for hydraulic fluid. A changeover valve has a slide for alternately connecting one of the spaces in the drive-piston/cylinder configuration to the reservoir and to the low-pressure tank. At least one separately controlled and arranged control piston is associated with the slide. A servovalve controls the at least one control piston to drive the slide from a first position to a second position, i.e., from a connected position to a disconnected position of the power circuit breaker.

Abstract: A valve includes two outlet ports and two inlets communicating with a chamber and includes two valve seats. A membrane is secured in the chamber. Two plugs are slidably engaged in the inlets for engaging with the valve seats and each includes one end engaged with the membrane and the other end slidably engaged with a cap. Two springs are engaged between the plugs and the caps for balancing the membrane and the plugs. One of the plugs is forced to engage with the valve seat by water from the inlet when no water is supplied to the other inlet.

Abstract: A mixer control valve comprises a base, a cover covering the base, and a washer, a cylinder and a control shaft disposed between the base and the cover. The mixer control valve couples with a water volume control valve. The water volume control valve has a control rod and a plurality of positioning rods. The cover has a first outlet, a second outlet, a plurality of fasteners, and a plurality of positioning holes to receive the corresponding positioning rods.

Abstract: A mixing valve comprising a modular cartridge non-rotatably mounted in a housing. The cartridge includes inlet passages in its bottom portion, outlet passages in its top portion, and a pressure balance valve intermediate and in communication with said inlet and outlet passages. The inlet passages are in communication at their downstream ends with supply ports in the housing. The outlet passages are in communication at their upstream ends with a volume and temperature control valve plate. The volume and temperature control valve plate is rotatable to align or misalign outlet apertures in said plate with the outlet passages in the cartridge. The rotation of the plate is controlled by a stem attached to a handle. Means are provided to adjust the maximum water temperature. The temperature adjustment means include an orienting stem ring having an opening shaped to receive a complementary shaped section of the stem.

Abstract: A valve includes a chamber and two inlets for supplying cold and hot water into the chamber. A membrane is secured in the chamber so as to separate the inlets from each other. Two plugs are engaged in the inlets and secured to the membrane for blocking the inlets. Two springs are engaged on the plugs for balancing the membrane and the plugs. One of the plugs is forced to block one of the inlet when no water is supplied from the other inlet, so as to prevent the users from being hurt by hot water.

Abstract: The disclosed methods and apparatus for mixing a secondary fluid with a primary fluid have utility in venturi and other fluid mixing systems in agriculture, fluid, fuel combustion and other fields where liquid or gaseous chemicals, liquid or gaseous fuels or other fluids are entrained in a stream of water, air or other gaseous or liquid primary fluid. One of these methods provides for the primary fluid (21) a first flow channel (65) deceasing in a direction of flow of primary fluid, utilizes dynamic energy of that primary fluid to induce secondary fluid (35) into that primary fluid, and provides for the primary fluid with induced secondary fluid a second flow channel (66) increasing in a direction of flow of that primary fluid with induced secondary fluid, while arranging corresponding sides 67 and 68 of these first and second flow channels along a plane common to said first and second channels.

Abstract: A fluid flow control system which can function under a range of input pressures for regulating the flow of fluid as a function of a variable input voltage and having a feedback feature which produces an electrical signal equivalent to the volume of fluid actually flowing from the control system, comprising a pressure balanced valve, a proportional solenoid having a movable shaft responsive to the input voltage and adapted to open the valve, said valve including, a fluid intake chamber having an intake port and a valve port, a fluid discharge chamber having a discharge port, a valve disk and a cooperating valve seat where the valve disk is connected to the shaft of the proportional solenoid so as to open and close the valve, a flexible diaphragm having a centrally disposed piston in contact with the valve disk a pressure equalizing chamber contiguous to the diaphragm, a biasing spring in contact with the piston and exerting a force thereon in a direction toward the valve disk for normally maintaining the valve

Abstract: A vehicular brake booster using fluid pressurized by a hydraulic power steering system hydraulic pump. Fluid pressure is controlled by using a pressure regulator in the pump output and by electronically switching fixed orifices in a boost developing valve controlling fluid flow within the power steering system. Additional control is effected by electronically opening and closing apply and relief valves controlling fluid flow respectively to and from a brake power booster for differing periods.

Abstract: A burner control system for controlling gas flow to a burner in response to a pressure differential indicative of air flow to the burner, the pressure differential being impressed across a diaphragm which actuates a bleed valve controlling the pressure on one side of the diaphragm actuator of a fuel valve. The bleed chamber is connected to the outlet of the gas valve and the low pressure side of a pressure differential through separate flow restrictors.

Abstract: A method and apparatus is provided for combining two components to form a coating material formulation in which one of the components is a "high volume" component comprising a resin including supercritical fluid as a diluent, and the other of the components is a "low volume" component, such as a catalyst. The relative ratio of resin to catalyst is controlled by adjusting the catalyst pressure as a function of the pressure at which the resin is supplied to ,one or more coating dispensers and by adjusting the duty cycle of a catalyst valve within the catalyst flow path.

Abstract: Device for determining the Wobbe index of a first gas mixture, including a Wobbe index meter having a mixing chamber, and a feed system for supplying a first gas mixture and an oxidation gas to the mixing chamber of the Wobbe index meter. The feed system includes structure for supplying the first gas mixture to the mixing chamber via a first number of openings, structure for supplying an oxidation gas to the mixing chamber via a second number of openings, structure for keeping a constant ratio between the a quantity of first gas mixture and the a quantity of oxidation gas supplied to the mixing chamber, structure for burning the second gas mixture formed in the mixing chamber and structure for determining the oxygen content of the combustion gas obtained after combustion.

Abstract: A method and apparatus for combining multiple components to form a coating material formulation in which one of the components is a resin, another component is a supercritical fluid employed as a fluid diluent, and, preferably, the third component is a catalyst. Two of the components are transmitted through separate flow paths to a first mixer within which they are combined to form a mixture, and then the third component is added to the mixture in a second mixer to form the coating material formulation for discharge by one or more coating dispensers or spray guns onto a substrate.

Abstract: The invention relates to a shower control valve assembly which includes a casing mountable in a wall with inlets for hot and cold water. A cartridge is insertable into the casing in one of two orientations so that the hot water inlet of the cartridge can be aligned with either one of the casing inlets, depending on which one is the hot water inlet. The casing has two outlets, one for the shower and the other for the tub. There is an integral bypass which takes water from the tub outlet to the shower outlet upon activation of a diverter valve. The cartridge is of the pressure and temperature balancing type, with water of the desired temperature flowing to the tub outlet and then to the tub or shower as desired. Each water inlet in the cartridge includes a check valve which, in one position allows water to enter the cartridge, and in the other position prevents water from leaving the cartridge through the inlet.

Abstract: A method and apparatus for combining multiple components to form a coating material formulation in which one of the components is a resin, another component is a supercritical fluid employed as a fluid diluent, and, preferably, the third component is a catalyst. Two of the components are transmitted through separate flow paths to a first mixer within which they are combined to form a mixture, and then the third component is added to the mixture in a second mixer to form the coating material formulation for discharge by one or more coating dispensers or spray guns onto a substrate.

Abstract: A fuel delivery system (10) incorporates a fuel splitter valve assembly (30) including a first valve (40) having a selectively positionable spool (42) disposed therein for controllably metering fuel flow therethrough for delivery to a first combustion chamber (22) and a second valve (50) operative to pass a second portion of the fuel flow to a second combustion chamber (24) while maintaining at least a desired minimum pressure upstream of the first valve (40) whenever the second combustion chamber is in operation, and to shut-off fuel flow to the second combustion chamber whenever the second combustion chamber is not in operation.

Abstract: Method and apparatus for mixing gases while providing a substantially constant gas-to-gas ratio while increasing or decreasing the flow of the mixture, wherein the flows of gases introduced into the mixing step are turbulent and have a Reynolds number of above about 2000.

Abstract: The invention relates to a mixer valve for hot and cold water having a cartridge-type body 10 with a rise 16 which is integral to the base 11 of its body and the rise having a slot 17 for holding a pressure balancer 18. The slot has passages for the inlet of water to the balancer and passages for the outlet of water from the balancer towards the plate-type mixer unit inside the body, the water coming out of the mixer unit and going towards the delivery mouth passing on outside and around the slot.

Abstract: A compound seal is provided for a valve having a housing, the housing having cold and hot water inlets and at least one outlet. The housing contains a replaceable cartridge having a valve actuation portion having cold and hot water inlets and outlets to allow fluid to interruptibly flow through the valve. The flow is interrupted when the valve actuation portion is moved from a valve open position to a valve closed position. The seal includes a body having first sealing elements to interrupt the flow through the inlet of the valve when the valve actuation portion is moved from a valve open position to a valve closed position. The body of the seal also has second sealing elements to interrupt the flow out of the valve through the outlet thereof when the valve actuation portion is moved from a valve open position to a valve closed position should the first sealing element fail.

Abstract: An apparatus and method are provided for preparing low concentration gas phase calibration standards. The flows of a standard mixture of impurity in a gas and a dilution gas are controlled by regulating the pressure upstream of respective calibrated orifices. The pressures of the gas flows are regulated such that a critical flow condition is maintained through the orifices. The two flows are then combined to obtain a known dilution of the impurity in the gas.

Abstract: A system is described that combines two or more fluids in fixed proportions over a wide range of flow rates, in which said proportions are independent of the rate of flow of the fluids, by causing each of said fluids to experience a drop in pressure which is approximately proportional to said fluid flow. An important application of such a system is to serve as a fuel-oxidizer combiner for a combustion engine to provide a constant ratio of air to fuel over a wide range of engine power output. The invention is especially useful in controlling the ratio of air to natural gas in natural gas fueled engines, where the gas is stored at very high pressures and is normally reduced to atmospheric pressure before being mixed with the air in an air-gas mixer.

Abstract: Disclosed is a method for taking a constantly proportional flowing sample of gas flowing through a line and which is part of measuring and determining the total energy flow, that is, BTUs per minute, of combustible gas flowing through a line such as a pipeline. One method includes taking a continuous sample of the gas flowing through the line which sample is a constant proportion of the gas flowing through the line, and burning the sample in equipment which supplies air to the sample in an amount which maximizes its burning temperature. The flow rate of air which produces the maximum burning temperature of the sample is a flow rate which is directly proportional to the rate of energy flow in the main pipeline. Alternately, the flow rate of air which produces a stoichiometric mixture is directly proportional to the rate of energy flow in the main pipeline.

Abstract: A liquid flow control device (20) comprises a variable orifice (28/30) in a conduit (15), and branch lines (41, 42) above and below a flow restriction, which may be the variable orifice itself. The orifice is controlled to maintain a predetermined relation between the pressures (P.sub.1, P.sub.2) in the two branches. A metering valve (60) for a second liquid to be injected into the conduit may be controlled simultaneously to maintain a preset ratio between the flow coefficients of the valve and the orifice, so that if the pressures above and below the metering valve are the same as the pressures above and below the variable orifice, the respective flow rates will stay in the same proportion, and the proportion of second liquid injected into the liquid in the conduit will be constant at all flow rates.

Abstract: A valve housing is claimed which provides for diversion of fluid flow into a valve cartridge from a selected inlet through a selected outlet to the valve cartridge. An opening is provided in the housing in which the cartridge is located. The housing also has diverting mechanisms disposed between the cartridge and the fluid inlets. The diverting mechanisms may be adjusted to orient the fluid flow into the valve cartridge. For example, if an installer incorrectly installs the hot and cold water inlets to the housing, the diverting mechanism may be moved to provide the correct orientation of flow into the valve cartridge.