Abstract: A distribution device for a circuit operated with a liquid medium for a heating system or a cooling system, such as a hot water heating plant, a solar plant or the like. The distribution device serves to separate the medium into individual circuits each having a distribution pipe for forward and return flow, wherein the distribution pipes are provided with regulating and locking members as well as, if necessary, measuring and indicating members for the individual circuits. The regulating and locking members include members for preadjusting the maximum flow rate and for regulating the respective circuit, wherein the regulating and locking members are each combined in a fitting with only one valve body with flow from the front against the valve body, and wherein the regulating and locking members are exclusively arranged in the return flow pipe.

Abstract: A tube assembly for a gas range includes a small aluminum manifold block, valve assemblies adapted to regulate flow of gas from the manifold block to the burners, and burner orifices adapted to control flow of gas to the burners. Aluminum valve supply tubes each have a first end staked to an associated outlet of the manifold block and a second end connected to an inlet of an associated one of the valve assemblies. Aluminum burner tubes each have a first end connected to an outlet of an associated one of the valve assemblies and a second end connected to an associated one of the burner orifices. Two or more small manifold blocks can be interconnected by aluminum manifold supply tubes. The manifold supply tube can be easily bent to position the manifold blocks in any desirable position. An igniter assembly includes a pin extending from a stem of the valve assembly and a contactless position sensor.

Abstract: A spraying system is provided with a plurality of spray sections, a discharge line coupled to each of the spray sections, and a control valve connected to each discharge line for regulating the flow of liquid from the discharge line to the spray section. The control valves are mounted in side-by-side relation and each have a housing with outwardly projecting retaining flanges formed thereon. The spraying systems also including plastic mounting clamps for connecting together the retaining flanges of adjacent control valves. The plastic mounting clamps each having separate first and second clamping members. The first and second clamping members each having a respective retaining section secured in overlying relation to the retaining flanges of adjacent control valves for captively securing the retaining flanges together.

Abstract: A stackable combination selector and shut off valve includes a three-way valve body which supports a two hole ball selectively rotatable for directing fluid flow through either of first and second opposite outlet ports or a central off position wherein flow is blocked to both outlet ports. The valve body preferably includes an internal manifold so that the valve may be stacked with other valves without requiring connection to an independent manifold. The motor control circuitry includes a single pole single throw on-off switch which operates in conjunction with a double pole double throw polarity reversing switch to enable the motor to work in a selected one of two quadrants.

Abstract: A tube assembly for a gas range includes a small aluminum manifold block, valve assemblies adapted to regulate flow of gas from the manifold block to the burners, and burner orifices adapted to control flow of gas to the burners. Aluminum valve supply tubes each have a first end staked to an associated outlet of the manifold block and a second end connected to an inlet of an associated one of the valve assemblies. Aluminum burner tubes each have a first end connected to an outlet of an associated one of the valve assemblies and a second end connected to an associated one of the burner orifices. Two or more small manifold blocks can be interconnected by aluminum manifold supply tubes. The manifold supply tube can be easily bent to position the manifold blocks in any desirable position. An igniter assembly includes a pin extending from a stem of the valve assembly and a contactless position sensor.

Abstract: A diverter valve with a shutoff feature for usage in an aircraft environmental control system is disclosed. The valve has a housing that includes an inlet connected with a source of air, and first and second outlets spaced 90.degree. apart. The first outlet is connected with the ECS refrigeration pack, while the second outlet, which is at a 90.degree. angle with respect to both the inlet and the first outlet, is connected with a bypass line that bypasses the refrigeration pack and is connected with a heater inside the ECS. A gate internal to the valve housing is rotatable over a 90.degree. range of motion to connect the air from the source to either solely the first outlet, to both the first and second outlets, to solely the second outlet, or to neither the first nor second outlets, depending upon a desired temperature of the air provided to the cockpit or cabin of the aircraft.

Abstract: An offset steam trap is designed for removing condensed water from a horizontal steam pipe to which the trap is connected. The body of the trap contains a ball valve for permitting limited water flow out of the pipe through an orifice, and the body has an offset portion or flow barrier between its inlet and the orifice. The body is installed with the orifice effectively below the center line of the pipe, to prevent water from collecting in the bottom of the pipe.

Abstract: An offset steam trap is designed for removing condensed water from a horizontal steam pipe to which the trap is connected. The body of the trap contains a ball valve for permitting limited water flow out of the pipe through an orifice, and the body has an offset portion between its inlet and the orifice. The body is installed with the orifice parallel to but below the center line of the pipe, so that water will not collect in the bottom of the pipe below the level of the orifice.

Abstract: A method of providing electrolyte to an electrolyte starved battery includes the steps of supplying electrolyte from a source to a dispenser and dispensing the electrolyte from the dispenser in a preplanned sequence to each of a number of electrolyte inputs in the electrolyte starved battery. Related devices for accomplishing such a method are also disclosed.

Abstract: A valve arrangement including a distributor housing (2) with a distributor duct (4), an inlet duct (46) which leads into the distributor duct (4), at least two outlet ducts (11, 12, 13) which lead out of the distributor duct (4), and a value associated with eac;h outlet duct. The values are integrated into the distributor housing (2) and have regulating flaps (31, 32, 33) whose axes of rotation (37, 38, 39) are arranged such that the flaps are situated partially in the distributor duct (4) and partially in the associated outlet duct (11, 12, 13). This construction reduces the overall size of the valve arrangement and eliminates dead spaces in which medium flowing through the valve arrangement could become trapped.

Abstract: A detergent dispenser that is coupled to a source of fluid and which has a chemical source in solid cast form. A spray generator is designed to generate a fluid spray bearing on the chemical source, the fluid spray generating a concentrated solution of the chemical. The concentrated solution of the chemical is discharged through a discharge conduit. A single valve controls a flow of fluid from the source of fluid. The valve has an inlet that is operably fluidly coupled to the source of fluid, an outlet that is operably fluidly coupled to the spray generator, and an outlet that is operably fluidly coupled to the discharge conduit. A metering device for selectively metering portions of the flow of fluid to the spray generator and to the discharge conduit is disposed within the valve and selectively fluidly couples the inlet to the outlet that is operably fluidly coupled to the spray generator and to the outlet that is operably fluidly coupled to the discharge conduit.

Abstract: A ball valve having a valve body defining a ball valve chamber and having a longitudinal axis defined by inlet and outlet passages. A ball valve element is rotatably disposed in said valve chamber. The ball valve element has a diametrically disposed fluid passage and is operatively connected to a control lever for rotating the ball valve element between a closed position and an open position. A basket strainer is removably mounted in the ball element passage in the ball valve element. The ball valve is provided with an internal pilot fluid flush passage that connects an inlet port to the ball valve chamber, and a pilot fluid flush discharge port and discharge valve that communicate with the ball valve chamber. A flow control plug valve is movably mounted in the internal pilot fluid flush passage for selective allowing or preventing fluid flow therethrough.

Abstract: A steam system is provided with a steam trap including a Y-fitting having a single fluid inlet, a primary outlet for returning water to a boiler, and a secondary outlet for testing only, and a main valve in series with the primary outlet. Connected to the secondary outlet are an auxiliary valve and a replaceable test jet downstream of the auxiliary valve, the test jet terminating the auxiliary branch. Test jets of various sizes may be installed, and outflow through each visually observed or measured, until an optimum size is arrived at. A main jet of a corresponding size is then installed in the main valve.

Abstract: A T-fitting for use in plumbing, particularly in the installation of an appliance that requires connection to the existing water supply to the building in the building in which the appliance is installed. The fitting has an inlet and an outlet having connectors for connecting to the existing water line after the water line has been cut. A second outlet is provided to connect to a water supply line to the appliance. Preferably, the second outlet has an integral valve so that the water may be regulated to the appliance without affecting the flow of water in the existing water line.

Abstract: An isolator flow control apparatus (10) especially to selectively control communication of a contained fluid to an overpressure protection system. The isolator apparatus (10) includes a flow housing (12) having a single inlet opening (20) placed in fluid communication by an internal manifold means with a plurality of outlet openings (22, 24). A floating rotatable ball closure member (28, 30) is operably disposed in each of the outlet openings (22, 24) for effecting a metal-to-metal seal with a fixed downstream seat (16d, 18d). The ball closure members (28, 30) are interlocked by a shaft (34) in a passage (14b) extending between enlarged diameter portions (22a, 24A) receiving the ball closure members (28, 30). The ball closure members (28, 30) are actuated by an operator means (40) for automatically closing or isolating a selected outlet opening (22 or 24) while opening another outlet opening (22 or 24) to ensure continuous fluid flow or fluid communication through the isolator apparatus (10).

Abstract: A flow control valve includes a body having a spherical hollow central section into which a spherical central body fits. Three fluid flow conduits are attached to the central section and two flow ports are defined in the central body with a flow passsage connecting the flow ports together. A control knob is attached to the central body and is used to move the central body from one orientation fluidically connecting one fluid conduit to a second fluid conduit to a second orientation fluidically connecting the one fluid conduit to a third fluid conduit. A flow selection plate having a plurality of notches defined therein is slidably mounted on the central section so various amounts of flow can be selected. The flow control valve can be used in a fluid circuit connecting a fluid source to various ones of a plurality of fluid flow driven subsystems.

Abstract: An add-on liquid overflow shut-off valve including a valve body, a float and an arm connecting the float to the body that is insertable in fully assembled form through a standard tank lid opening, and further including a flanged end on the valve body for engagement outside and above the rim of the opening and threads associated therewith to engage the periphery of the opening to anchor the body inside the interior of the tank and at the top thereof, pneumatic openings formed in the top flanged end in spaced-apart relation for connection respectively to a pressurized pneumatic source and a pneumatic-driven liquid pump arranged to pump liquid into the tank through another opening in the tank, first and second pneumatic passageways formed interior the body extending from the openings, a third pneumatic passageway formed in the body for interconnecting the first and second passageways, and a shaft pivotally received in the body, having a fourth pneumatic passageway formed therethrough for pneumatic alignment with

Abstract: A combination gate valve and throttle valve is presented for use between a process chamber and at least one pump includes a base plate a lower plate and a gate plate. The base plate is attached to the process chamber and includes a base plate gas port for each pump in the system. Each pump is attached to the lower plate. Where each pump is attached to the lower plate there is a lower plate gas port. Each of the lower plate gas ports lines up with one of the base plate gas ports. The gate plate is attached between the lower plate and the base plate. The gate plate has gate plate gas ports so that when the gate plate is moved into an open position with respect to the base plate and the lower plate, the gate plate gas ports line up with the lower plate gas ports and the base plate gas ports allowing gas to flow from the process chamber through the gas ports to the pumps. When the gate plate is moved into a closed position the process chamber is selaed from the pumps.

Abstract: A misting head assembly including a cylindrical rotor having a chordal flat, a center post having a flow passage, a swivel arm having a tubular portion with a radial through opening mounted for swiveling about the rotor and a connecting portion. The swivel arm connecting portion is adapted for removable mounting of a spray nozzle thereto. The rotor flat defines with the center post housing portion and swivel arm tubular portion a longitudinal flow passage for conducting water from the center post to the swivel arm opening to be sprayed outwardly therefrom through the nozzle when the swivel arm is aligned with the chordal flat of the rotor. In one embodiment, seals are provided for sealingly preventing flow of water from the longitudinal flow passage when the swivel arm is swung from alignment with the chordal flat. An indicium is provided on one end of the rotor for indicating the open position of the nozzle.

Abstract: A dual shower head assembly for use in personal showers to allow two people to shower independently at the same time, one person to shower in a conventional manner or one person to shower with two separate sprays. The assembly includes an upper shower head, a lower shower head, a substantially "S"-shaped connecting conduit, a diverter valve assembly and an adjustable shut-off valve. The diverter valve assembly is adapted for threaded engagement with the water supply pipe protruding from the shower wall and defines a pair of water outlets, one of which communicates with and is pivotally connected to the lower end of the connecting conduit. The shut-off valve is carried by the diverter valve assembly and communicates with the other of the water outlets in the diverter valve for selectively allowing water flow therethrough. The lower shower head communicates with and is pivotally mounted on the shut-off valve, downstream of the diverter valve.

Abstract: A distribution and shut-off device for hydraulic systems, particularly domestic water systems, comprises at least one main pipe section, an auxiliary pipe having an axis which is not coplanar with the axis of the main pipe section and leading at its ends to two distribution outlets, a passage which connects the main pipe section to the auxiliary pipe, and two valves for shutting off the flow of fluid towards the two distribution outlets. The first on-off valve is situated at the junction of the connecting passage with the auxiliary pipe. The valve is movable between an open position in which the two branches of the auxiliary pipe situated on the two sides of the valve communicate with each other and with the connection passage, and a closed position in which the connection between the two branches of the auxilary pipe is closed and the passage only communicates with the branch of the auxiliary pipe leading to the outlet with which the second on-off valve is associated.

Abstract: A valve for the proportioning of fluid flow between orifices (14,15) consists of a first cylinder (16) provided with a tapering circumferential groove (19) in its periphery, and a pair of cylinders (17,18) contacting the first cylinder respectively in the path between those orifices and a single orifice (13). The pair of cylinders (17,18) have tapered circumferential grooves (20,21) arranged so that rotation of the cylinders causes opening of one path and closing of the other.

Abstract: An end member of a valve body is provided with first, second, and third passages to define an integral tee fitting. Two of the passages are generally aligned for receipt in the flow path of a main processing line. The third passage extends generally perpendicular to the first and second passages and communicates with the valve chamber. The first and second passages also include threaded regions to facilitate interconnection with the main processing line.

Abstract: A compact set for a cooking range comprising a plurality of valves including a single first body containing closing valves situated contiguously and equidistantly.

Abstract: In a valve system for controlling the flow of liquid fuel and steam to a nozzle in a large scale power plant boiler, a pair of valves are operated by rotary pneumatic actuators. Three-position operation is achieved for one of the valves by coupling the valve shafts together through a lost-motion coupling and using an actuator for the other valve which delivers more torque than the actuator which operates the three-position valve. The same actuator and coupling system can be used for straight high pressure mechanical atomization, for mechanical atomization with recirculation, and for steam atomization, with simple substitution of rotary valves.

Abstract: Apparatus for treating workpieces under the action of hot gases within a chamber in order to achieve as homogeneous a treatment or processing as possible are provided with a valve mechanism whereby the gas is made to flow alternately from one side to the other over objects or workpieces within the chamber, the valve mechanism being especially designed to operate with heated gases and serving to reverse the gas flow.

Abstract: An irrigation device designed to change the water flow in the main supply pipe (underground) to different directions for a timed period, then switch back. A timer in a control-box determines the switching cycles. A butterfly-valve actually changes the direction of the water flow, and an extension converts the power applied from the control-box to the valve body. This underground surge irrigation system is designed for furrow flood irrigation and some forms of sprinkler irrigation to increase the efficiency of the water applied, for a more uniform soak profile through the whole field.

Abstract: To easily control flexographic printing ink of different colors, and washing liquid, to a plurality of printing plates on a plurality of printing stations of a system, a valve housing (26) is formed with a plurality of connection ducts, each coupled to a respective ink and washing fluid supply line. A plurality of elongated plug valve elements (41) are located in bores of the housing, the valve elements having axial bores and axially and circumferentially offset radial bores, leaving a portion of the plug elements solid to form an OFF position. The radial bores can be aligned, upon rotation of the valve elements, with coupling ducts which, in turn, connect with second fluid connection ducts (27-30, 31).

Abstract: The flow rates in the cooling circuits of the apparatus can be controlled with the aid of a computer by means of ceramic turning valves. The computer is connected to the central computer of a plastic injection molding machine. The valve body disks, lying under constant pressure via ceramic sealing surfaces against valve seat disks, can be turned by means of pulse-controlled electric motors. Each fitting has a valve channel between the channel section of the supply channel and the channel section of the discharge channel which is covered by a valve seat disk and which forms a valve chamber. This achieves the effect that the deviations from the set temperature in the temperature-critical zones can be substantially reduced with acceptable technical expenditure. The temperature constancy achieved may be maintained for a virtually unlimited time without appreciable maintenance work.

Abstract: A valve apparatus interconnects a single inlet duct with a plurality of outlet ducts. The apparatus has a manifold body that provides a passageway between the inlet and the outlets. Operatively positioned in each outlet is a butterfly valve. A single drive motor is used to operate all the valves, wherein each valve is operated independently of the other.

Abstract: A transmitter/manifold with integral transducer for measuring the differential pressure of a fluid conveying pipeline is provided. Valves are arranged to provide automatic sequencing for service functions. Means for heating the transmitter/manifold is provided. Interface modules are provided to provide for adaptability to a variety of user requirements. A sealing arrangement for interface modules is also disclosed.

Abstract: A valve for use in distributing irrigation water in a surge irrigation system. The valve having a diverter member rotatably mounted within the cylindrical cavity of a valve body. The diverter member has an arcuate diverter plate mounted thereon which conforms to the curvature of the cylindrical cavity and wiper blades extending from said diverter plate into the space between said plate and the interior of the valve body. Upon circulatory or oscillatory rotation of the diverter member, the wiper blades sweep the interior of the valve body. The diverter plate may be selectively aligned with one of the outlet ports in the valve body, thereby diverting flow from the inlet port to the remaining outlet ports. The diverter member design minimizes engagement with particulate matter and it minimizes the force exerted upon this member by the irrigation water to decrease the torque and corresponding power consumption required to rotate the diverter member.

Abstract: A changeover valve for a bath and shower is disclosed which has alternative flow channels formed by three disks. In a first position fluid flow is shut off. In a second position fluid flows through axially aligned ports in the three disks and in a third position fluid flows through a generally U-shaped passage formed by two of the three disks. The second position provides greater flow than the third position.

Abstract: Double-lumen tube adaptors for use with either single or dual anesthesia or ventillating machines enable the various features thereof to be utilized without airway disconnection or clamping, interruption of ventilation or the use of unreliable mechanical elements. The adaptor having a single machine-side entry port comprises a support frame and a pair of linear axially-extending cylindrical tubes in substantially parallel disposition extending rotatably through the frame, each of the tubes defining externally of the frame at one end a patient-side exit port adapted for communication with a patient via one lumen of a double-lumen tube and at the other end an entry port with a removable cap. Each of the tubes further defines within the frame interior intermediate the entry and exit ports an aperture extending appreciably in a direction transverse to the tube axes.

Abstract: IA purge block is disclosed in which inlet, process, purge and vent ports are series connected in a ring or bridge. The channel or passageway connecting the inlet and purge ports comprises a flow sensor. The impedance to gas flow of each channel is different from the others. The impedances are chosen such that improper operating conditions cause an imbalance in the flow which is detected by the flow sensor. During normal operation of the system in which the purge block is used, the flow sensor acts as an excess flow detector by comparing the flow through itself with the flow through a parallel, but more restrictive, path within the purge block.

Abstract: A vent line system is disclosed which is adapted for connection to a flow diverter attached to a drilling rig. The system assures that the vent line is always open for discharge of pressurized drilling fluid away from the drilling rig in one of two directions.

Abstract: A dual flow distribution header system in which the flow is divided into two paths before the distribution header but after a metering device. The flow is controlled by separate butterfly valves in each path, whereby the control function is magnified and becomes more precise in each path. The invention is particularly adapted for use with industrial heating furnaces employing dual burner systems.

Abstract: Fluid under pressure, such as compressed air, is applied to one end of an elongate, thin, tubular plenum, the opposite end of which exhausts to the atmosphere. The plenum has intermediate its ends a plurality of axially spaced exhaust ports, which are connected to a valve mechanism having a rotary or reciprocable valve stem, which can be adjusted selectively to connect any one of the plenum exhaust ports through a single output port to a pneumatically operated device. The pressure of the air traveling through the plenum drops at a substantially linear rate, so that the pressures at the spaced exhaust ports can be plotted against the respective distances of these ports from the inlet end of the tubular plenum, thereby to provide a curve which can be used for predicting the pressure at any given point along the length of the plenum.

Abstract: A cooling air system for a glassware forming machine which has a plurality of individual forming units, with each unit having a plurality of different mechanisms to be cooled and each unit having the same mechanisms. The system includes a manifold associated with each mechanism, an inlet line connecting each manifold to a source of cooling air, and a pilot operated regulator in each inlet line. The manifold is connected to its associated members in all forming units. Manually operated means are associated with each of the pressure regulators for individually controlling the flow of pilot air to each pressure regulator.

Abstract: A high velocity carburetor comprises a housing defining an air flow conduit with an air valve member therein. The air valve member includes a curved air-conducting surface facing the air stream and at least one position of the member for establishing a vortex flow. Fuel is supplied through the axial center of rotation of the air valve member to the conduit and into the vortex stream for facilitating atomization of the fuel into the air stream. The valve member is J-shaped or cylindrical. A fuel metering device is provided through the axial center of rotation of the air valve member which includes an axially movable but rotationally fixed inner fuel conduit mated to a rotationally movable but axially fixed outer tube. A cam is provided on the outer tube with a cam follower on the other tube to establish a needle fuel valve or metering fuel to the air conduit. This carburetor can be used in either a power-increasing or a fuel-efficient mode.

Abstract: This invention relates to a divert valve comprising a pair of disc valves operated by a common actuator wherein the tolerance in the mating between the valve seat and the disc in one disc valve disposed in the first bifurcating pipe is controlled independent of the other disc valve disposed in the second bifurcating pipe branching out from the first bifurcating pipe.

Abstract: A flow control for base mounted valves having a number of ports that extend through it and valve elements that are positioned for directly controlling the flow through at least certain of the ports. The valve elements include operators that are accessible at one end of the valve block for controlling the valve elements.

Abstract: Manifolds assembly having a plastic body with intersect flow passages and valve members for controlling communication between the passageways. Stops limit the movement of the valve members between predetermined positions, and the valve members can be removed from the body and reinstalled in reversed position to provide fixed communication between certain of the passageways. Externally threaded nipples are provided for connecting the assembly to external fixtures, and resilient sleeves are inserted between the valve members and the body to form fluid tight seals.

Abstract: A low restriction multiple outlet valve includes a housing having an interior chamber with an inlet opening thereinto, at least two outlets, and a flow directing member. The flow directing member snugly rotates about a portion of the chamber on an axis. The flow directing member also includes at least one aperture therethrough which is spaced from the axis and which is selectively positionable so as to allow flow communication between the inlet and a selected outlet. Preferably, the flow directing member is hemispherical in shape and includes two apertures spaced 90 degrees to each other relative to the axis and the housing includes a pair of outlets spaced 180 degrees from each other relative to the axis. In addition, the valve is normally utilized in conjunction with at least one pressure relief mechanism such as a rupture disc associated with one of the outlets thereof. The valve is normally positioned so as to flow communicate the inlet thereof with the relief device.

Abstract: A three-passage valve comprising (1) a body with a main passage (10) and two secondary passages (12,13), each of the secondary passages being fitted with a respective closure member (2,3) and the valve as a whole being provided with a single, common actuator unit (6) to operate the closure members in such a manner that the valve can occupy any one of three positions: a first position in which the main passage is in communication with a first one of the secondary passages while the other secondary passage is closed; a second, or intermediate, position in which both of the secondary passages are closed; and a third position in which said first passage is closed while the main passage is in communication with said other secondary passage.

Abstract: An adjustable flow restricting valve for speed control of a pneumatic motor, comprising a tube shaped valve body which is rotatably supported in a boring and which is provided with a recess for uncovering fully or partly an outlet opening in the boring. The restricting valve is associated with a control valve for operation of a pneumatic motor. The tube shaped valve body is rotatable by means of a maneuver screw which extends transversely relative to the valve body and which forms a worm gear with the latter. The high gear ratio of the worm gear enables a precise setting of the valve body. In a multiple arrangement of control valves, the tubular valve body of one flow restricting valve forms part of the exhaust passage from one or more flow restricting valves, located upstream thereof.

Abstract: A modular multiple-fluid component selection and delivery system comprised of a main block having a centrally located main passageway intersected by a plurality of secondary passageways. Plug valves are inserted in bores in the block which intersect each respective main and secondary passageway. A valve at the entrance to the main passageway permits flushing the system with a solvent for cleaning the main passageway and spray gun. A check valve at the entrance to the main passageway prevents a backup of fluid components into the solvent supply system. The secondary passageway exits at the sides of the block to which are attached hose connecting fittings. The main passageway terminates in the opposite end of the block in threads for attachment to a main hose to a spray gun for spraying a fluid component such as paint.

Abstract: A motor means controlled three way butterfly valve is disclosed for regulating the flow of liquids, as in internal combustion engine cooling system and passenger compartment heating and air conditioning systems. The valve plate includes two flat parallel surfaces which engage two corresponding flat parallel surfaces formed on the cylindrical passage in the valve body to reduce valve plate binding or sticking against the inner surface of the flow passage when the valve plate is rotated.

Abstract: A vacuum controlled three way butterfly valve for regulating the flow of fluids, as in internal combustion engine cooling systems and automotive heater systems, wherein a valve body includes a bypass port located in spaced relationship to the valve plate. In one position, the valve plate stops the flow of fluid through the valve body and permits the flow of fluid to return to the engine water pump. In the other position, the valve plate blocks off the bypass port, permits the flow of fluid through the valve body then restricts the throughput of fluid by means of a resilient orifice to protect the heater downstream of the valve core from excessive fluid pressure developed by the engine water pump and then to return the flow of fluid to the engine water pump.

Abstract: A valve assembly is useful for providing ports for connecting hydraulic circuits when the need arises. When an auxiliary circuit is being connected to the valve assembly, the circuit already connected may develop a differential fluid pressure drop. The subject valve assembly includes an inlet, a first outlet and a second outlet. A shut-off valve is positioned between the inlet and the first outlet. The shut-off valve must be in the closed position before the auxiliary circuit can be connected to the second outlet of the valve assembly. The shut-off valve includes a handle having an extending portion which overlies the second outlet when the shut-off valve is in the open position thus preventing the connection of circuit to the second outlet. This arrangement of components prevents connecting the auxiliary circuit to the valve assembly when the shut-off valve is in the open position.