Abstract: A directly controlled hydraulic pressure valve includes a valve housing and an outer valve sleeve which is placed in a port of the valve housing. The port is closed by a cover. A cylindrical inflow component is arranged in the interior of the valve sleeve. The inflow component has a first portion whose diameter is smaller than the internal diameter of the valve sleeve and a second portion having a greater diameter, wherein the outer valve sleeve rests with its end face against the second portion. The pressure valve further includes a cup-shaped tubular piston which is longitudinally movably arranged in an annular space between the valve sleeve and the inflow component, wherein the bottom of the tubular piston is located remote from the second portion. An annular groove is formed in the first portion of the inflow component. Axially extending inflow ducts are provided in the end face of the second portion of the inflow component.

Abstract: A solenoid valve for use in controlling the flow of pneumatic fluid under pressure between a pair of flow ports defined by a housing. The flow of fluid is controlled by a spool disposed within a bore and is movable between first and second positions. When in one of the first and second positions, the spool blocks communication between the ports and when in the other of those positions it allows communication between the flow ports. The spool is reciprocated by a motor means which includes a core of magnetic material connected to the spool so that when the motor is energized, the spool is placed in one of its first and second positions and when the motor is de-energized, a spring moves the spool to the other of its positions.

Abstract: A valve 1 for controlling a fluid medium flowing under pressure comprises an inlet opening 6 and an outlet opening 12 as well as an inlet member 4 having the medium flowing axially therethrough and a sleeve-shaped control member 13 axially displaceable between a closed and an open position relative to the inlet member 4, whereby in the closed position the outlet opening 12 is closed and in the open position the outlet opening 12 is opened. In addition, a first radially projecting, elastic sealing ring 24b is provided and a first annular sealing edge 25 which is adapted to be pressed sealingly against the first sealing ring 24b in a closed position of the control member 13.

Abstract: A safety guard or lockout device (22) for a dual chamber orifice fitting device (1) having a removable orifice plate (4). In a normal position when the upper and lower chambers (8, 9) are equal in pressure, the guard (50) of the safety guard device (22) is in a retracted position relative to the square end (36) of a valve gear shaft (18) as shown in FIG. 3 to permit connection of a manual tool, such as a wrench, to square end (36) of valve gear shaft (18) for actuation of isolation valve member (16). When changing the orifice plate (4), the pressure in the upper chamber (8) is reduced to atmospheric conditions and provides a fluid pressure differential between chambers (8) and (9). The fluid pressure differential moves fluid responsive member (30) and guard (50) to an extended position covering the square end (36) of valve gear shaft (18) to prevent access of a manual tool to the shaft (18) thereby preventing operation of the isolation valve (16) separating the upper chamber (8) from the lower chamber (9).

Abstract: An inflation control system including a high flow valve is controlled by pilot air selectively delivered by a piezo vent valve. The high flow valve includes a pilot input, an outlet and a main air chamber fed with main supply air through a main air conduit. The high flow valve further includes a diaphragm with an upper web, a lower web, a cylindrical member connecting the upper and lower webs and an annular ridge extending radially out around the cylindrical member. A pilot air supply is connected by a pilot air conduit to the pilot input. A piezo pilot valve interposed on the pilot air conduct opens or closes to provide or prevent the pilot air to the high flow valve. The pilot air shifts the high flow valve from a closed to an open state. A vent valve connected to the pilot air conduit removes the pilot air to allow the high flow valve to close.

Abstract: Control valve for high pressure drop, which includes:(1) Seat ring with an extension on the lower side formed by a drilled cylinder(2) Cylinder which guides the plug and is also drilled in its lower side(3) Plug, with diameter decreasing in steps from the upper to the lower side, these plug diameters combined with the inside diameters of cylinder and seat ring, create inner chambers or intermediate stages, which divide the total pressure drop of the fluid across the valve in several smaller pressure drops, in a preferred design as shown in FIG. 1, there are 3 inner stages.(4) A lower ring chamber in between diameter of the plug (3) and the inner diameter of the seat ring (1).(5) A cylinder chamber, inside the plug (3) which is hollow, and(6) An upper ring chamber formed by the intermediate plug (3) diameter and the inner diameter of the cylinder (2).Chamber (4) and (6) are also balancing chambers in that the pressure around the plug is the same all around.

Abstract: In accordance with an illustrative embodiment of a high pressure water blast gun as disclosed herein, such gun includes a valve body having inlet and outlet ports and an internal chamber, and a removable valve cartridge in the chamber which includes a guide tube and a valve closure element slidably arranged in the tube. The closure element includes a leading end portion having a peripheral edge that engages an inclined seat surface in the guide tube with line contact on a first diameter, and a trailing end portion which is sealed against the guide tube on a second diameter which is greater than the first diameter to provide a hydraulic bias force that tends to close the valve against the seat. Both hand and foot operated embodiments are disclosed.

Abstract: A piston fluid valve mechanism and method, wherein annular outer and core inner coaxial valve members are adapted to move to and fro slidably relative to one another and to bar upstream-to-downstream fluid flow when mutually juxtaposed into seated position but adapted to enable such flow when spaced apart in unseated position.

Abstract: A high pressure valve having a gland with a pressure assist chamber therein, a body with an inlet and an outlet and a seat between the inlet and outlet. A piston in the pressure assist chamber. The stem having a lateral tip having a soft stem tip is concentrically bored to connect fluid pressure from the inlet to the top of the piston urging the piston to move the stem and the soft valve tip member toward the valve seat.

Abstract: Pressure compensated cartridge valve with a valve housing (1, 2) in which is axially guided a valve stem (10) which at one of its ends is provided with a valve cone (12) the sealing surface (13) of which in the closed position engages an annular rim (15) formed at the inside of the housing, whereby an annular chamber (20) provided between valve stem (10) and housing on one side of the annular chamber constituted one pressure connection of the valve by way of connecting bore (21), and the port chamber (13) of the housing bore (9) receiving the valve stem (10) constitutes a further pressure connection of the valve on the other side of the annular rim (15), and whereby a pressure balance bore (23) connects the port chamber (19) with a counter pressure chamber (24) within the valve housing (1, 2) which counter pressure chamber surrounds the end of the valve stem remote from the valve cone (12), and whereby the pressure balance bore (23) extends within the valve housing (1, 2) and a channel (36) connecting the ann

Abstract: An emergency shutoff valve for monitoring fluid and stopping fluid flow in a conductor in the event of fluid pressure decrease below a predetermined value at the downstream outlet port of a valve. The valve body contains a valve seat and a normally open valve for seating on the seat and includes opposing valve stems each slidably supported, at one end portion, by the body. The valve head is fluid pressure balanced by equal upstream and downstream valve stem cross sectional areas. A plate is secured to the body by posts in axial spaced relation with respect to the downstream outwardly projecting end portion of one valve stem for supporting a pressure collapsible rod-like pin axially interposed between the plate and the valve stem. A valve stem spring biases the valve toward its seat with the bias offset by fluid pressure against a valve stem piston on the upstream end of the valve stem. A drop in pressure against the valve stem piston assists the spring in collapsing the pin and seating the valve.

Abstract: A pressure relief valve for monitoring pressure in relatively large diameter conductors containing relatively high fluid pressure. The valve having housing openings of equal diameter with respect to the conductor and a flow passageway provided with different diameter coaxial sleeves slidably receiving interconnected dual diameter pistons. The smaller diameter piston forms a flow passageway stop while the larger diameter piston generates a pressure differential with respect to the smaller diameter piston for moving both pistons toward a flow passageway open position in which a piston rod guides the pistons in their axial movement with respect to the sleeves and collapses a pressure collapsible pin supported by a pin cage connected with the valve body in axial alignment with the piston rod for opening the valve passageway and releasing fluid pressure from the conductor. The larger diameter piston is apertured to admit downstream fluid pressure to its low pressure side.

Abstract: An automatic recirculation valve having an inlet, a main outlet, and a recirculation outlet. A main valve element responsive to the flow between the inlet and main outlet and a bypass element responsive to the main valve element regulates the fluid flow to the recirculation outlet. The bypass element contains orifices through which the fluid flows to the recirculation outlet. The orifices are arranged to counterbalance fluid forces exerted on the bypass element.

Abstract: An emergency shutoff valve for monitoring fluid flow rate and closing a fluid conductor in the event of fluid flow increase above a predetermined value. The valve body contains a valve seat and a normally open valve head for seating on the seat and includes opposing valve stems each slidably supported, at one end portion, by the body. The valve head is fluid pressure balanced by equal upstream and downstream stem cross sectional areas. A plate is secured to the body by posts in axial spaced relation with respect to the downstream outwardly projecting end portion of one valve stem for supporting a pressure collapsible rod-like pin axially interposed between the plate and the valve stem. A valve stem bushing permits positioning the valve head relative to the seat for the purpose of changing the critical rate of flow required to impinge on the valve head resulting in an axial force on the valve stem that collapses the pin.

Abstract: A flow control valve for instant on-off operations with gases or liquids at relatively high pressures, such as pressures between 10,000 psi and 100,000 psi. The valve includes a valve body having two or more valve cavities in communication with each other and defined by two end seal assemblies and one or more valve port seal assemblies. An elongated, round, sliding valve stem is centrally located through the seal assemblies. End plugs are used to support the end seal assemblies. The valve stem has fluid passages which are preferably machined at a mid-section of the valve stem. The valve stem is slid parallel to its longitudinal axis to allow or prevent communication between the valve cavities by way of the fluid passage of the valve stem. Two opposite ends of the valve stem are either not exposed to the working fluid or are exposed to different pressures of the working fluid.

Abstract: A substantially cylindrical, plug-type configuration of the element offers a mass which is less responsive to non-uniform and unsteady pressures, and channeling therein opens centrally, and about the periphery thereof, onto a recess formed in an end of the element which closes onto a valve seat. The channeling and recess are cooperative to assure that the balance-end of the element will have average, representative pressures conducted thereto.

Abstract: An adjustable differential pressure valve that controls the pressure of a input fluid by maintaining a pressure differential between the fluid and another fluid, or fluids, of reference pressure, acts as a bypass valve and allows the pressure differential to be adjusted from the outside of the valve either mechanically or by remote hydraulic pressure. In an alternative embodiment of the invention, opposite ends of extensions of the piston are exposed to the outlet pressure of the valve by a passage communicating directly through the extensions and the piston.

Abstract: The present invention relates to a proportional valve, in particular for fuel dispensing systems, to recover fuel vapor to the gas station tank. According to the invention the valve member is defined by a tandem piston arrangement to increase safety and accuracy in controlling the vapor volume to be recovered. The invention further relates to a valve arrangement for fuel dispensing systems having a plurality of fuel nozzles.

Abstract: A diaphragm valve is provided which can be used both with corrosive liquids without valve component degradation and with chemically pure liquids without deleteriously affecting the liquids' purity. The valve incorporates a valve body having at least one inlet and at least one outlet, with a valve seat between each inlet and outlet. A pair of spaced-apart diaphragms are provided which are in contact with the fluid flowing through the valve. A poppet assembly, which extends between the diaphragms, incorporates a valve stem with a valve plug on one or both ends which engages an associated valve seat. A leak detection port is provided to detect liquids which may leak through either one of the two diaphragms.

Abstract: A relay valve for a fluid pressure braking system includes a relay piston and a load piston which is responsive to the pressure at the inlet port of the relay valve to exert a biasing force on the relay piston loading the latter against the inlet/exhaust valve. The biasing force is opposed by fluid pressure at the inlet port acting across the effective area of the inlet/exhaust valve. The biasing force is greater than the spring force holding the inlet/exhaust valve closed, so that the valve responds immediately to pressure signals transmitted through the control port of the relay valve.

Abstract: An electrohydraulic pilot valve that includes a valve spool movably mounted within a valve body for selectively coupling a valve inlet to a valve outlet. A solenoid is mounted on the valve body for applying a force to one end of the spool as a function of an electronic control signal. A pair of fluid restrictions are connected between the valve outlet and a fluid pressure sump effectively to form a pressure divider, from which fluid is fed back to the opposing end of the valve spool.

Abstract: A surge relief valve suitable for high pressure application, for example in a crude oil pumped pipeline. The valve has a plug movable to expose different areas of an energy-absorbing cage trim to fluid flow. The plug position is controlled by a control device proportionately responsive to changes in upstream fluid pressure. The valve requires no external power for its actuation.

Abstract: A shut-off valve assembly in a very high pressure water gun is provided with a valve member between a pressure chamber and an outlet chamber which produces a quick pressure induced snap-off action just before closing which securely seats the valve member against leakage and erosion. Shortly after cracking the valve to an open position the pressure induced force is relieved and the regular biasing spring offers the only closing force. An improved high pressure seal is configured to seal with a short stem contact area designed to significantly reduce friction. A special safety bleeder valve bleeds to atmosphere independent of starting pressure.

Abstract: The valve has a casing with inlet and outlet ports, and a valve opening bordered by a valve seat communicating the ports. A flexible diaphragm defines a control chamber and a pressure chamber on opposite sides thereof and moves between an open position clear of the seat, and a closed position against the seat. The valve seat is within the pressure chamber, and the diaphragm is normally urged closed. A flexible bellows extends between and is sealed to the diaphragm and the casing on a side of the diaphragm remote from the seat. The bellows provides a bellows chamber isolated from the control chamber to enclose an effective area of the diaphragm generally equal to the valve opening of the valve seat. The diaphragm has an orifice providing limited communication between the control and pressure chambers and having a size sufficient to reduce fluid flow between the chambers to reduce diaphragm speed and thus chances of hydraulic hammer.

Abstract: A pressure-balanced hydraulic coupling for use in undersea drilling and production operations, the coupling having radial passageways communicating between the male and female members such that substantial fluid pressure is not exerted against the face of either member during coupling or uncoupling or during the coupled state. Check valves in both the male and female members are opened when the male member probe is fully inserted into the receiving chamber of the female member. Mutually opposed valve actuators contact one another to effectuate the simultaneous opening of each check valve, and allow fluid to flow through a valve port and then radially through matching fluid passageways in the male and female members. The radial passageways of the male and female members match up at their longitudinal surfaces so that fluid pressure between the male and female members is in a substantially radial direction and is not exerted at the face of either member.

Abstract: A retention balanced valve, particularly for great depth oil prospection, has a plunger and a plunger guide displaceable inside a cylindrical valve body which is closed in one extremity. The plunger provides the sealing of lateral openings of the valve body and covers seal rings. When the plunger is displaced by an external actuation force against the force of a spring, it deobstructs the openings and allows the displacement of the plunger guide until a protection nut associated to the plunger guide covers the sealing rings.

Abstract: A control valve for fluid media has an adjusting piston which is displaceable by a drive and whose face end can be seated against a valve seat. The adjusting piston and the drive are disposed in a valve housing which is completely filled with fluid. The adjusting piston is formed by a hollow body through which fluid can flow on both sides in the direction of its axis, and the hollow body surrounds a cavity. The cavity is sealed by a first sealing member extending transversely of its axis against the valve housing, and by a second sealing member which extends against a dividing wall which is contained in the cavity and is displaceable in a direction of the axis. The valve housing is filled on one side of the first and second sealing member facing away from the valve seat with an incompressible hydraulic protective fluid.

Abstract: A fluid flow control valve assembly which comprises a valve housing having defined therein a valve chamber defined therein a valve hole, inflow and outflow ports adapted to be communicated with each other through the valve chamber by way of the valve hole; and a valve rod inserted exteriorly of the housing and into the valve chamber and coupled with a handle for turning the valve rod about a longitudinal axis thereof thereby to move the valve rod in a direction coaxial with the longitudinal axis of the valve rod to adjust an opening of the valve hole. The valve rod includes a valve member formed on one end of the valve rod confronting the valve chamber and axially movably inserted in the valve hole, and a shank portion formed on a generally intermediate portion of the valve rod and slidably, but fluid-tightly sealing the valve chamber.

Abstract: A mass flow controller having a bypass portion provided in a body through which a large amount of gas is passed and a sensor portion, laid between a primary chamber which is an inlet of the bypass portion and a secondary chamber which is an outlet of the bypass portion, through which gas flows at a small flow rate proportional to the flow rate of the gas passed through the bypass portion and capable of measuring the total flow rate of gas by measuring the flow rate in the sensor portion. The body is partitioned by a bulkhead into a primary chamber and a secondary chamber. The primary chamber is provided with an inlet for gas inflow and the secondary chamber is provided with an outlet for gas outflow. The bulkhead is provided with a plurality of through holes for connecting the primary chamber to the secondary chamber, and bypass elements selected depending on the flow rate in the bypass portion are fitted in the through holes in the bulkhead.

Abstract: A valve device takes the form of a multi-part cartridge with a hollow stepped housing containing a stepped rod. A control piston at one end of the rod is opposed by the force of a main spring in a main chamber remote from the control piston. A valve closure member is axially displaceable relative to the rod. The valve closure member is normally held against a valve seating but pressure on the control piston displaces the rod and causes the valve closure member to be lifted from its seating via stop faces. An auxiliary chamber in the housing leads via a connection to some consumer appliance and forms, the downstream side of the valve. A compensating piston on the rod member opposes a face of the valve closure member open to the auxiliary chamber. A further spring in the auxiliary chamber holds the valve closure member on its seating. The valve can open independently of the control piston should the pressure on the upstream side of the valve exceed the consumer pressure.

Abstract: The well water removal and treatment system of the present invention includes a pumping and well water withdrawl loop consisting of an above ground pump, a pressurized water drive line from the pump outlet to a well water ejector, a water return line from the well water ejector to an aeration and precipitation tank, an inlet line from the aeration and precipitation tank to the pump and a venturi nozzle air mixing manifold fluidically connected between the high pressure drive water line and the lower pressure water delivery line to mix air into the water during the entire pump cycle. The water delivery line from the pumping and withdrawal loop has a flow control regulator therein that controls the water flow therethrough in proportion to the water pressure in the pumping and withdrawal loop above a preselected minimum control level.

Abstract: A high pressure valve assembly has a bore with a seat intermediate its ends and an inlet on one side an outlet on the other side of the valve. A double headed piston within the bore has a closure head between the seat and the outlet and a control head on the other side of the inlet to the seat. The control head has a slightly greater projected surface area facing towards the seat than the closure head. There is a cage between the seat and the outlet, which defines an annular chamber about the bore between the seat and the outlet, the chamber opening into the outlet. The cage has a number of rings of apertures spaced from the seat which are successively opened as the closure head moves away from the seat. The closure head extends beyond the apertures and has a "U"-seal at its downstream end. The control head also has a "U"-seal. The seals face towards the seat. The bore is closed by end caps. The valve assembly is manually operable or by means of a control fluid.

Abstract: A hydraulic servovalve is controlled electrically through electromagnetic means. Electrical currents applied to force motors determine the relative position of a single, displaceable control assembly within the valve. Displacive movement of the control assembly changes, in reciprocal proportion, the inlet and outlet flow-metering clearances in each of the chambers of this open-passage type valve. The position of the control assembly determines the inlet and outlet flows within, and, therefore, the net flow through, each chamber. Moreover, since the chambers are each connected (either directly, or through a flow-impeding orifice) to one of the control ports, the position of the control assembly thereby determines the control flow delivered by the valve. Generally, both hydrostatic and hydrodynamic forces within the valve are balanced against corresponding forces, all acting upon the control assembly.

Abstract: An axicage multistage choke (10) wherein fluid flow is caused to impinge upon itself at each stage. Fluid entering inlet (14) is distributed by primary annulus (32) around the interior of upper cage (30). Fluid enters upper cage port (36) and impinges on itself in axial chamber (37). Fluid leaves chamber (37) through stem slots (38) into secondary annulus (42). From secondary annulus (42) fluid passes through lower cage ports (46) into axial chamber (47), again impinging on itself and dissipating energy. Fluid leaves choke (10) through outlet (16). Additional stages maybe added depending on the flow rate or pressure drop desired in the valve.

Abstract: A hydraulic spool valve 40 (FIG. 2(a)) of the edge control type in which the peripheral ends 31, 33 of a spool land 47 cooperate with a radial service port 41 to define by axial spool position the the closure of the port 41 and degree of opening to supply or return port 18, 19. The spool 25 is located in a sleeve 14 itself located in a housing 11 and O-ring seals 22', 22" inhibit leakage between sleeve and housing beyond the seals. Leakage fluid up to the seals exerts a contracting force onto the sleeve and when the spool is in a neutral position closing the service port stiction occurs between the sleeve and the end 36 of the spool land closest to the return port.

Abstract: A laminar flow control valve has a valve housing with an inlet and an outlet, an orifice plate, a poppet, an operating mechanism such as an electrically powered proportional solenoid, and a mechanism for realigning the poppet and orifice plate to maintain selected surfaces of those components in substantially parallel relation. The gaseous flow is throttled between respective parallel surfaces of the orifice plate and poppet such that the volumetric flow rate is linearly proportional to the pressure differential across the parallel surfaces. The poppet is mounted to a stem of the operating mechanism so as to be free to move in more than one plane relative to the orifice plate. In the embodiment illustrated, the poppet is free to swivel so that the metering surfaces "self-align" each time the valves close. The preferred embodiment of the invention utilizes a flat orifice plate and poppet. The poppet is attached to a stem of the operating mechanism by mechanical means.

Abstract: The cartridge (10) has a bulkhead (14) carrying a housing (16) on which is mounted a hollow inlet member (20). A valve member (24) is accommodated in the housing and is attached to a valve operating rod (26) extending through the bulkhead and having a pilot control system mounted on the opposite side of the bulkhead from the housing. A valve seat (28) is supported on the inlet member, which defines with the housing an outlet (30), across which the valve member travels when moving towards and away from the valve seat. The pilot control system has an outlet tube passing through the bulkhead and communicating with the interior of the inlet member and having an outlet tube passing through the bulkhead and opening outside the housing and the inlet member. The cartridge has a slam-shut valve member (32) slidable in the lower end of the inlet member operated by a cable (42) and an actuator (46).

Abstract: A solenoid operated hydraulic control valve system including a solenoid operated valve having a specially ported spool valve to statically balance spool forces in the opened and closed positions.

Abstract: A downhole signal generating mud pulser has a poppet and orifice signal valve to variably resist the drilling fluid stream. The poppet is upstream of the orifice and is moved by a piston in fluid communication with opposite flow related sides of the signal valve such that more pressure drop across the valve applies more piston force to open the valve. The poppet is spring biased toward the orifice and the piston force and spring balance when a preselected operating pressure exists. A servo valve controls flow in a by-pass loop to apply additional pressure to the piston to create a signal pulse when open. The servo valve is urged closed by flow in the servo loop and the closing is retarded by a dashpot to determine signal duration. The servo valve is spring biased to open and is automatically latched closed by a latch that responds to a solenoid actuated to release the servo valve.

Abstract: A pressure-balanced hydraulic coupling for use in undersea drilling and production operations, the coupling having radial passageways communicating between the male and female members such that substantial fluid pressure is not exerted against the face of either member during coupling or uncoupling or during the coupled state. Check valves in both the male and female members are opened when the male member probe is fully inserted into the receiving chamber of the female member. Mutually opposed valve actuators contact one another to effectuate the simultaneous opening of each check valve, and allow fluid to flow through a valve port and then radially through matching fluid passageways in the male and female members. The radial passageways of the male and female members match up at their longitudinal surfaces so that fluid pressure between the male and female members is in a substantially radial direction and is not exerted at the face of either member.

Abstract: A low friction proportional unloading valve mechanism for pressurized fluid circuits incorporating a valve housing forming primary and bypass fluid circuits. A normally closed unloading valve normally prevents the flow of incoming fluid to the bypass fluid circuit and is opened by a pressure responsive valve actuator. The valve actuator forms a pressure responsive wall and may take the form of spaced diaphragms or a deformable flexible hose that induces opening force to the unloading valve in direct proportion to the pressure in the primary fluid circuit. Upon opening of the unloading valve, a check valve in the primary fluid circuit prevents back flow and thus maintains valve controlling pressure on the movable wall structure of the valve actuator.

Abstract: A balanced sleeve control choke includes a choke with inlet and outlet flow passages intersecting in a cylindrical flow chamber. A balanced external sleeve and cage trim configuration which vents downstream pressure to a balance chamber within the choke body includes an external sleeve with a wear sleeve of tungsten carbide shrink fitted therein is reciprocable within the flow chamber to control flow between the inlet and outlet flow passages. The external sleeve is closed at one end with a stem extending therefrom which is reciprocated by a handwheel operated travelling nut assembly. The external sleeve telescopes over a flow cage of composite construction secured within the flow chamber with a portion of the flow cage constructed of tungsten carbide with pressure balancing ports therethrough. The external sleeve has ports disposed within its wall which communicate downstream pressure to a balance chamber disposed thereabout.

Abstract: The present invention provides an in-line fluid flow control valve adapted and designed for installation in an existing fluid line carrying fluid under pressure, without the necessity of interrupting flow of fluid through such line, and further provides apparatus for installation of the valve of the invention and a method of installation of the valve of the invention. The valve of the invention generally comprises a valve body having a sleeve to be placed around the fluid line and a neck extending outwardly from the sleeve, a double acting and hydraulically balanced valve member to seal the fluid line and the neck of the valve body, and a valve actuating assembly to operate the valve and to maintain proper alignment of the valve member.

Abstract: A high force gain valve including a fluid inlet, a diverter to absorb pressure and flow forces, a fluid outlet, a moveable gate surrounding the diverter and interposed between inlet and outlet to effect fluid metering, and actuation rods extending out of the pressure region for positioning of the gate. The gate has a beveled sealing edge exposed to the fluid pressure within the housing which permits the gate to be force biased in the open direction. The high force gain valve is designed to reduce tensile and shear stresses so that the valve can be constructed of moderate or low tensile and shear strength materials, such as refractory materials.

Abstract: A tank blanketing valve in which a biased piston is positioned to control the flow of source gas into the tank. The piston is biased by a spring and a pilot gas stream from the source gas (the biasing pressure or force) to close the tank gas inlet. The pilot gas stream is controlled by a pressure sensing component of the valve, whereby the pilot gas stream is directed away from the biased piston when the pressure in the tank is less than a predetermined pressure. This reduces the biasing pressure which is holding the piston in the gas inlet line to the tank. The pressure of the source gas on the piston in the source gas inlet line then exceeds the biasing pressure and causes the piston to slide open and admit source gas into the tank.

Abstract: A flow control and pressure reducing valve has a valve body with an inlet chamber and outlet chamber separated by a partition plate. A plurality of passages are formed in the valve body spaced circumferentially around the partition plate and have an inlet portion opening into the inlet chamber and an outlet portion opening into the outlet chamber. Elastomeric flow control means are positioned in the passages and are responsive to pressurized fluid introduced therein to control flow of fluid through the passages around the partition plate. The valve configuration allows the mounting of inlet and outlet gates within the inlet and outlet chambers to eliminate the need for separate gate valves. An auxiliary flow passage may be provided through the partition plate an flow controlled therethrough to increase the flow capacity of the valve yet still provide full flow and pressure control. Air inlet and relief valves may also be provided as an integral part of the valve.

Abstract: A force-balanced lifting valve for the control of a fluid, comprises a housing having paths for the fluid, an axially movable component in the form of a valve body provided on a shaft mounted so as to be axially movable in the housing, for the opening and closing a valve opening, and a sealing structure for sealing the axially movable component with respect to the housing. The valve body has associated therewith a force-balancing compensation area, which can be acted upon by pressure fluid by way of a subsidiary channel. The sealing structure comprises an elastic, axially effective sealing ring which sealingly engages the valve housing and the axially movable valve component, such that a radial portion of the ring rests axially and sealingly against at least one abutment shoulder on the axially movable valve component.

Abstract: A system is utilized for controlling the flow of process fluid between an input port and an output port of a valve. A first mechanism controls the modulation of the valve and a second mechanism controls the positive shutoff. An electrical system is responsible for modulation adjustments and a pneumatic system is responsible for positive shutoff control. A third, hydraulic, system is responsible for equalizing the pressure of the process fluid within the valve.

Abstract: A novel digital servo valve system for use in displacing an actuator is capable of operating either in closed or open loop mode. The system includes a controller that compares computed values of actuator parameters with preselected parameter values and iteratively determines therefrom command signals for the servo valve. The servo valve is characterized by a ball screw mechanism that eliminates mechanical backlash and a torsion bar which increases radial and angular compliance. A servo valve provided according to the present invention also displays reduced flow forces using a simple, inexpensive valve body in combination with a uniquely configured displaceable spool.

Abstract: An improvement to an integrated valve assembly which generally consists of a cluster of two poppet valves, four electric-solenoid-operated flapper valves, and four thrust nozzles and interconnecting plumbing. The improvement to the integrated valve assembly reduces the force required to operate the flapper valves thereby minimizing solenoid size, weight, and power consumption. The improvement consists of a modified flapper valve tip having a hole bored through the tip in the direction of tip motion, and a free-fitting piston located therein and suitably axially restrained relative to the flapper valve body.