Abstract: A valve comprises a housing having a main inlet, a detection port and an outlet, each providing a channel extending from an exterior of the valve into a hollow interior defined in part by the housing. The inlet is arranged, in use, to be in fluid communication with the interior of a pressurised cylinder of extinguishant fluid. The detection port is arranged, in use, to be in fluid communication with a fire detection system. The valve has two valve parts which are relatively movable between a first position, a second position and a third position. In the first position, a face seal prevents communication between the high pressure chamber and the low pressure chamber, in the second position, the face seal is in an unsealed position and allows communication between the high pressure chamber and the low pressure chamber, and in the third position, the face seal prevents communication between the high pressure chamber and the low pressure chamber.

Abstract: The invention relates to a quick-opening valve for a pressurized extinguishing fluid vessel, having an extinguishing fluid inlet (4), an extinguishing fluid outlet (5), a flow chamber which extends from the extinguishing fluid inlet (4) to the extinguishing fluid outlet (5), a valve piston (12), a valve seat (10), wherein the valve piston is movable back and forth between an opened-up position and a shut-off position such that the valve piston (12) and the valve seat (10), in the shut-off position, bear against one another in fluid-tight fashion and, in the opened-up position, are spaced apart from one another such that the extinguishing fluid inlet (4) and the extinguishing fluid outlet (5) are fluidically connected to one another. It is proposed according to the invention that the extinguishing fluid inlet (4) and the extinguishing fluid outlet (5) are oriented substantially parallel to one another.

Abstract: The disclosure provides a bending adjustment device, a related flexible display device, and a manufacturing method thereof. According to embodiments of the disclosure, the bending adjustment device comprises a plurality of conduits arranged in parallel. The bending adjustment device further comprises a plurality of air bags, wherein at least one air bag is disposed between the adjacent conduits of the plurality of conduits. The bending adjustment device further comprises at least one air sucking and charging apparatus connected to the plurality of conduits at their ends. The other ends of the conduits are closed. The air sucking and charging apparatus is configured to suck or charge air from or to the plurality of air bags through the plurality of conduits, such that the plurality of air bags expand and contract between the adjacent conduits.

Abstract: A pulse valve arrangement includes a valve housing on which is fixed a control valve The valve housing includes a circular cylindrical portion with a valve member movably arranged therein. The valve chamber has an inlet adapted to be connected to a pressure medium source for allowing pressure medium to flow into the valve chamber and an outlet through which pressure medium flows out of the valve chamber. The control valve may be closed in which the outlet of the valve chamber is moved to a closing position blocking the flow of pressure medium, or may be opened in which the outlet of the valve chamber is moved to an opening position allowing a pulse of pressure medium therethrough. The valve member within the valve housing is freely displaceable within the circular cylindrical portion of the valve housing based on the pressure within the valve chamber as controlled by the control valve.

Abstract: A valve arrangement is provided for selectively connecting a source of fluid pressure to a consumer in order to actuate the consumer in a predetermined direction. The valve arrangement utilizes a valve cone arranged in the valve body which connects the valve ports with each other when the valve cone is in its open position, and is actuated by a holding force which is greater than the force acting on the pressurized fluid side of the valve cone and dependent on the medium pressure in the input port.

Abstract: Methods and systems for operating a cylinder lock valve to control fluid flow to a hydraulic cylinder operating a drilling rig sub-system. The lock valve 1) allows fluid flow through the valve if pressure on a main and pilot area overcomes a closing spring force on the valve, or 2) blocks flow through the valve if a loss in charge pressure in the main and pilot area falls below the closing spring force on the valve.

Abstract: A valve has a valve body including a main chamber having a first port and a second port, and a main poppet disposed within the main chamber. The main poppet includes a first surface forming a control chamber within the main chamber. The valve has a first passage communicating the control chamber with the first port, and a second passage communicating the control chamber with the second port. The valve also includes a pilot valve having a pilot poppet for controlling fluid flow from the control chamber to the first port through a third passage, and to the second port through a fourth passage, respectively. The valve may further have a feedback spring coupled between the main poppet and the pilot poppet to provide a force relative to a distance between the main poppet and the pilot poppet.

Abstract: A valve includes a body, a cage, a plug, a stem, a stop ring, and a pilot plug. The cage includes at least one cage port there through allowing fluid communication between the fluid inlet and the fluid outlet. The plug is movable linearly within the cage to allow fluid communication between the fluid inlet and the fluid outlet when the valve is open. The pilot plug is adapted to transfer downward force from the stem to the plug by contacting the stop ring of the plug and thereby urging the plug downward through the cage when the stem moves linearly downward to adjust the valve from the closed position to the open position. In an alternative embodiment, the stem includes a collar adapted to contact the plug and adjust the valve from the closed position to an open position.

Abstract: Systems and apparatus for controlling the flow of fluid into a tank, such as a fuel tank on heavy equipment. An inlet valve includes a head portion for making connection with a nozzle, a receiver attached thereto and a piston which closes against a face in the head portion. A float valve includes a float and a valve which seals when a predetermined fluid level is reached. A bleed line is used to connect the receiver to the float valve. The unique design allows placement of the float valve at any desired height within the tank, and placement of the bleed line inside or outside of the tank as may be desired for the application.

Abstract: A control valve assembly (43) for use in a system in which a pump-motor unit (35) can either receive drive torque from a drive-line (17) or transmit torque thereto. The system includes a high pressure accumulator (41) and the control valve assembly is disposed between the pump-motor unit and the accumulator, and includes a mode valve (45) normally biased closed by pressure in a control cavity (89), the fluid pressure in which is controlled by a pilot valve assembly (49) in response to an electrical signal (133). A step-orifice valve (47) associated with the mode valve poppet member (79) provides a relatively larger orifice (115) into the control cavity (89) when pressure therein is high, and a relatively smaller orifice (119) into the control cavity when pressure therein is low, i.e., when the pilot valve assembly (49) is open.

Abstract: A pressure reservoir is used to exert pressure on a hydraulic system with which, a gas exchange valve, for instance, of an internal combustion engine can be actuated. The pressure reservoir includes a housing and a piston that is prestressed in operation by a device. To enable making the pressure reservoir as small as possible, it is proposed that the device which prestresses the piston of the pressure reservoir has a characteristic force-travel curve, in one range of motion of the piston, that has a slope which differs from the slope in a different range of motion of the piston.

Abstract: In a compressor at least one bypass valve is arranged in a low-pressure zone inside a casing of the compressor. The bypass valve defines a chamber connected by a first duct to at least one compression pocket situated in the peripheral zone of the compression stage and by a second duct to the low-pressure zone, the two ducts opening near one another so that they can be shut off by a shutter which can move in the chamber, being guided by the walls that delimit this chamber, a third duct intended for conveying a shutter-control fluid opening into the lower wall of the chamber of the valve. The shutter is opened by gravity when no control fluid is applied.

Abstract: A pilot operated safety relief valve (14) having a main piston valve member (26). A dome chamber (42) is provided in the valve body (18) over piston valve member (26) and a cap (44) forms a closure for dome chamber (42). A pilot valve (46) is mounted on the cap (44) and has a diaphragm actuated fluid inlet sensing tube (60) received within a bore (30) of the piston valve member (26). Inlet fluid pressure is communicated through bore (61) of sensing tube (60) to the inlet fluid sensing chamber (84) on the outer side of diaphragm (65). Exhaust chamber (56) is positioned between dome chamber (42) and inlet sensing chamber (84). Adjustment spring (67) continuously urges O-ring (72) in dome chamber (42) to a seated position on seat (70). An annular clearance (78) is provided between sensing tube (60) and piston (26) for providing a restricted fluid flow between dome chamber (42) and the inlet (20).

Abstract: An on/off valve (O/OV) and directional valves (DV1, DV2) are packaged with a switching valve system (10) in a housing assembly (156, 157, 158, 160). The on/off valve (O/OV) is operated by a control handle (154) that is located at one end of the housing assembly (156, 157, 158, 160). The direction control valves (DV1, DV2) are operated by a handle (141) located at the opposite end of the housing assembly (156, 157, 158, 160). The control handles (154, 141) operate to position cams (152, 136, 138) which function to help position valve plugs. In a second embodiment, the handle (141) and cams (136, 138) for controlling the directional valves (DV1, DV2) are replaced by a solenoid valve system (SV2) . A second solenoid valve (SV1) is added to the control system for the off/on valve (O/OV). The solenoid valve (SV1, SV2) allow for a remote positioning of the controls for the off/on and directional valves (O/OV, DV1, DV2).

Abstract: The invention relates to a plate valve (1) as used for the actuator of a control valve. It comprises an inlet (2) with a sealing seat (3) around which the openings of the outlet (7) are arranged, and it has two plates (4), (5), between which there is an interspace (13). Both plates (4), (5) are attached to the housing (11) by springs (6) in a spring space (12). The spring space (12) is operatively connected to a proportional valve by an opening (14) and a line (9). If the pressure in the spring space (12) is lowered by the proportional valve, the additional plate (5) first of all drops as a result and thereby exposes the outflow openings (10) in the large plate (4). There is a slight flow of the oil from the inlet (2) through the orifice plates (8) situated in the plate (4) and through the outflow openings (10) to the openings of the outlet (7). In a second stage, the plate (4) then drops and thereby exposes the openings of the outlet (7).

Abstract: An on/off valve (O/OV) and directional valves (DV1, DV2) are packaged with a switching valve system (10) in a housing assembly (156, 157, 158, 160). The on/off valve (O/OV) is operated by a control handle (154) that is located at one end of the housing assembly (156, 157, 158, 160). The direction control valves (DV1, DV2) are operated by a handle (141) located at the opposite end of the housing assembly (156, 157, 158, 160). The control handles (154, 141) operate to position cams (152, 136, 138) which function to help position valve plugs. In a second embodiment, the handle (141) and cams (136, 138) for controlling the directional valves (DV1, DV2) are replaced by a solenoid valve system (SV2). A second solenoid valve (SV1) is added to the control system for the off/on valve (O/OV). The solenoid valve (SV1, SV2) allow for a remote positioning of the controls for the off/on and directional valves (O/OV, DV1, DV2).

Abstract: A master/slave discharge valve assembly for pressurized fluid containment systems includes a primary valve chamber, for connection to a fluid pressure source, formed by an eccentrically disposed first longitudinal bore and a secondary valve chamber defined by a second bore generally parallel to that of the primary chamber, communicating at one end with the primary valve chamber and a the other end with a discharge port. A displaceable primary valve member is positioned within the primary valve chamber. A slave valve member and an actuating piston are to open the slave valve member and permit a holding portion of pressurized fluid to vent to the atmosphere, thereby permitting the pressurized fluid to open the first valve member and allow pressurized fluid out the discharge port. A master/slave valve assembly according to the invention is of lower cost to manufacture as well as simpler and sturdier in construction than known valves for carbon dioxide fire suppression systems.

Abstract: Hydraulic equipment used for starting engines utilizing a source of hydraulic fluid under pressure. The fluid under pressure is supplied to an engine starter motor through a valve assembly without causing shock loads, wherein the valve assembly comprises a soft start valve including a tapered poppet valve and a pilot valve for controlling movement of the poppet valve.

Abstract: A device for distributing pressurized water to a plurality of sprinkler lines is provided. The valve and valve control portions are centralized, and thus no electrical connection to remote locations is required. The valve system is modular so as to permit addition or deletion of modules for adding or removing control of sprinkler lines. A stepper motor and cam shaft system permits expenditure of energy only during change-of-state events, so that no electrical energy need be consumed to maintain a watering state. A generator which produces electrical energy from the pressure head of a pressurized water source provides electrical energy for operating a motor and a motor controller, such as a device including a microprocessor.

Abstract: A fluid pressure control apparatus having a main valve and a pilot valve for moving the main valve to a shutoff position as a function of the fluid pressure in a supply fluid. The pilot valve is connected to receive supply fluid having a fluid pressure Ps through a first passage. A second passage connected to the first passage communicates supply fluid to a control chamber in the main valve. A first restriction in the second passage limits the fluid pressure of the supply fluid communicated to the control chamber to a fluid pressure Pc. The control chamber is connected to a reservoir having a fluid pressure Pr through a third passage having a second restriction therein to control the flow of fluid from the control chamber. A first piston located in the main valve is responsive to a pressure differential between the fluid in the control chamber and supply fluid presented to an outlet chamber to control the flow of supply fluid as a fluid pressure Pc to a system from the main valve.

Abstract: A pressurized water closet operating system comprises an accumulator vessel having a flush valve assembly mounted internally thereof both of which are connected at all times to a source of water under pressure. A remote control valve hydraulically conditions the flush valve for the discharge of water under pressure from the accumulator vessel.

Abstract: A pressure actuated valve having a diaphragm assembly for receiving any one of a plurality of interchangeable restrictor elements of varying passageway diameter for changing the rate of valve closure and for servicing clogged passageways is disclosed. The valve employs a restrictor element having a selected inlet port diameter with a metering pin slidably mounted therethrough. The diaphragm assembly provides a slidable mounting for the restrictor element to enhance the cleaning action of the metering pin. A method of adjusting the rate of valve closure and servicing clogged or worn restricted inlet ports in such valves is also disclosed.

Abstract: An improved multiple stream, fluid mixing and dispensing apparatus for automatically regulating flow rate for one or more preset fluid flows including a plural station, fluid flow rate console assembly adapted for cooperating with the standing hydraulic pressure of a dual fluid supply means with a variable effluent flow rate regulator interposed in each of the main supply conduits and associated controller means for presetting the flow rate through each regulator and for determining both the degree of mixing and the incidence of fluid flow to be provided from each supply conduit to the exit conduit. The apparatus being specially adaped for permitting pneumatic operation.

Abstract: A proportional pressure control valve has a metering spool which selectively meters flow between an axial first port and radial second ports. The spool is axially reciprocable with a larger face toward the first port and a smaller face opposite from the first port, with a pressure equalization bore through the spool. A first spring extends between the smaller face of the spool and an armature and the armature is biased to a normal position by a second spring and also has a pressure equalization bore through it. Radial orifices are formed in the end of the armature facing the smaller face of the spool, and the end of the armature seats in the main bore in which the spool is seated. Passageways extend from the orifices to the second ports, and two selectively and variably energizable electromagnetic coils coaxially encircle the armature, one to draw the armature to one side of the normal position and the other to draw the armature to the opposite side.

Abstract: A bleed valve (20) includes a reciprocating sliding element (42) with a circular head (48) joined to an annular wall (50). An annular first chamber (52) defined by the wall (50), the head (48), and the central support (30) has a variable volume dependent upon the relative position of the sliding element (42). The valve (20) includes a housing (22) having a base (26) with first and second annular partitions (62,64) protruding from the base (26). An annular second chamber (66) is defined by the first partition (62), the platform (34) of the central support (30), the second partition (64), and the base (26). An opening (72) in the central support (30) connects the second chamber (66) in fluid communication to the first chamber (52). Control air supplied from an engine source flows through a first bore (78) into the second chamber (66) which is vented to ambient via a second bore (80). The first and second bores (78,80) have a primary and secondary metering orifice (84,86).

Abstract: A metering valve for water faucet that is triggered at the water discharge by a light touch on the trip stem so that the hand that triggers the valve is ready at the washing position at the start of the water flow. The disclosed metering valve consists of a trip stem which penetrates through the valve outlet port to the exterior of the valve. There is a pressure chamber wherein the pressure controls the open and closure of the valve. The pressure in the pressure chamber is determined by means of feed and bleed. In the closure mode the bleed opening is blocked and the pressure chamber is pressurized by the water supply through the feed. A light touch on the trip stem causes the bleed to open and a depressurization in the pressure chamber. This opens the valve and starts a metering cycle. After the trip stem is release, the bleed is blocked again and the pressure chamber starts to recover its pressure slowly through the feed flow path.

Abstract: An improved multiple stream, fluid mixing and dispensing apparatus for automatically regulating flow rate and temperature for one or more preset fluid flows for connection to domestic water delivery systems including a plural station, fluid flow rate and temperature control console adapted for cooperating with the standing hydraulic pressure of a dual temperature fluid supply means with a variable effluent flow rate regulator interposed in each of the main supply conduits and associated controller means for presetting the flow rate through each regulator and determining both the degree of mixing and the incidence of fluid flow to be provided from each supply conduit to the exit conduit.

Abstract: A method and system, including a valve (32) for controlling the amount of fluid purged from a cylinder (12) of a two-cycle engine prior to the combustion of an air-fuel mixture within the cylinder especially during low demand periods of engine operation. The system including a throttle (26) disposed upstream of an inlet port (14) and controlled to be maintained in an open condition during such intervals. The valve (32), which is adapted to communicate with a scavenge port (30) includes a piston (80) that is movable relative to an aperture (76) in response to a pressure differential created in part by the operation of a cooperating electromagnetic valve (54), such that when the piston is moved to uncover the aperture a predeterminable amount of fluid within the cylinder can be purged therefrom as the cylinder piston is moved through its compression cycle.

Abstract: The invention contemplates an adapter for easily converting existing gas metal arc welding apparatus to serve the relatively elevated gas-flow requirements of a gas-constricted arc nozzle.The adapter makes it possible to utilize a shop-air or other high-capacity source of pressurized gas, in substitution for a conventional gas cylinder, and in making the substitution the existing solenoid valve and its controls remain without change except that the solenoid valve becomes the control, for pilot operation of a main valve forming part of the adapter.

Abstract: In order to provide a control valve for reducing the pressure of a fluid flowing through a system, while also achieving the pressure reduction in an acoustically damped manner, the flow control valve utilizes a pressure reduction chamber for reducing fluid pressure in an incremental manner together with a valve member having a porous insert for acoustically damping noise generated during the pressure reduction. The flow control valve includes a valve housing having a valve chamber intermediate a fluid inlet and a fluid outlet through which the fluid inlet communicates with the fluid outlet. By utilizing these components in the valve, the pressure reduction chamber can be disposed generally intermediate the fluid inlet and valve chamber, and the hollow valve member can be disposed in communication with the pressure reduction chamber, whereby the porous insert in the hollow valve member will further reduce fluid pressure in an acoustically damped manner upstream of the fluid outlet.

Abstract: The invention disclosed herein relates to a check valve actuator for opening and closing a check valve, utilizing system pressure. The check valve actuator is comprised of a piston connected to a clapper assembly by a connecting rod. The piston is slideably received in a piston cylinder containing a control valve and a latching stem. A protective cage and a protective cover are mounted over the piston cylinder.

Abstract: An adjustable throttle valve is controlled by a low pressure control pressure acting on a spring urged adjusting cylinder for positioning the end of a follow-up piston adjacent the end of a discharge channel extending the length of a throttle piston; power fluid flows from a source through a discharge opening between a housing and the throttle piston with the spring force, the control pressure, infeed pressure and discharge pressure acting in concert to maintain the end of the follow-up piston adjacent but slightly spaced from the end of the discharge channel for maintaining throttle piston equilibrium.

Abstract: A flushing valve arrangement for controlling the flow of a pressurized flushing liquid includes a housing unit including an inlet and an outlet for the flushing liquid and a housing which bounds a flow passage that connects the inlet with the outlet. The housing is outwardly spaced from the outlet to bound therewith an annular channel which surrounds the outlet and opens into a communication region of the flow passage. A flushing valve unit is interposed in the flow passage downstream of the communication region and controls the flow of the flushing liquid from the inlet to the outlet. An externally actuatable shut-off valve unit is integrated into the arrangement and includes a shut-off sleeve surrounding the outlet and movable into and out of the annular channel toward and away from its closing position in which it extends into the communication region of the flow path and prevents the flushing liquid from flowing from the inlet toward the flushing valve unit.

Abstract: A pilot-operated valve suitable for pontoon inflation arrangements contains a main valve poppet urged against a valve seat connecting the inlet and outlet ports of the valve. A portion of the inlet pressure urges a piston carrying the valve poppet away from the valve seat, but this is resisted by a portion of the inlet pressure acting in a pressure volume on the opposite side of the piston. By way of an electrical signal, a manual operation or pneumatic pressure, a pilot valve is opened so as to relieve the pressure on the main valve poppet tending to close it. This allows the valve to open and fluid to pass through the valve assembly. Once the pilot valve has opened pressure from the inlet is applied within the pilot valve to hold it in the open position until the inlet pressure has been substantially reduced. Operation of the pilot valve also allows inlet pressure to be applied to a crossover connection of the valve.

Abstract: A bleed screw is built into a solenoid actuator used to control a diaphragm controlled valve so that the valve can be opened manually by means of the bleed screw or remotely or automatically through use of the solenoid. Both the bleed screw and the solenoid actuator are configured to relieve diaphragm pressure maintaining the valve normally closed so that either or both can open the valve.

Abstract: A differential pressure-actuated valve with a piston slidable to open or to close an inlet port. The piston slides in a cylindrical wall, and separates a bias chamber and a flow chamber. The piston is fitted with two oppositely-directed lip seals, one of which seals against bias chamber pressure, and the other of which scrapes particulate matter off of the wall. Optionally, an elongated filter extends from the piston into an inlet pipe where it filters water which flows to the bias chamber. The filter may have a perforated mesh wall, or a solid wall with an open end.

Abstract: A pneumatically amplified conservation valve controls a flow of gas, such as oxygen, to a hospital patient. A sense tube monitors pressure variations as a result of exhalation by the user. The exhalation pressure variation deflects a diaphragm which closes a check valve that serves to vent gas through a bleed port. When the check valve closes the bleed gas is restricted in a chamber which deflects the diaphragm which in turn drives a connector that pushes a plunger to close a port that is connected to the source of gas through a supply tube. The gas is normally supplied through the supply tube and a normally open pneumatic valve to an output tube and then to the user. The pneumatically amplified conservation valve provides gas to the user except when the user is exhaling thereby substantially saving the amount of gas that must be provided to a user.

Abstract: The valve for supplying a flow medium to a flow medium pipe which alternatingly carries different flow media, in particular to the flow medium pipe of a converter for treating the contents of a converter with various gaseous flow media, exhibits a chamber (20) between the flow medium inlet (7) and the flow medium outlet (10), which chamber may be closed on the side facing the flow medium inlet (7) by a piston (11) and on the side facing the flow medium outlet (10) by a disk (12). The piston (11), on the side turned away from the chamber (20), and the chamber (20) are optionally connectable via separate flow medium pipes (27 and 28, respectively) with the flow medium inlet (7) and the free atmosphere, respectively, to close the chamber (20) by the piston (11) and evacuate the chamber, or with the free atmosphere and the flow medium inlet (7), respectively, to open the chamber (20) by the piston (11).

Abstract: A pilot operated flow regulating valve which can be remotely controlled by varying the energization to a solenoid. The valve consists of a normally-closed, spring-biased, pressure-differential-actuated, main valve element and a pressure-compensated, pilot flow valve employing a solenoid acting like a remotely controllable electromagnetic spring to control the flow of fluid through the pilot valve and the pressure difference across the main valve element.

Abstract: The present invention is directed to an apparatus (10) for providing a gaseous pressure pulse. Apparatus (10) includes a container (12) having an exhaust path through ports (30) and (26) of a first valve (20) when a space (32) above a ball closure element (44) is relieved of overambient pressure through ports (82) and (46) of a second valve (22) when space (84) is relieved of overambient pressure by a solenoid valve (72). The first and second valves (20,22) are structured to relieve the overambient pressure on the unsealed sides of the closure elements (44,74) rapidly thereby rapidly opening the exhaust path to create a high volume, low pressure pulse.

Abstract: "A poppet valve assembly includes a valving element in the form of a freely slidable poppet, a freely slidable pilot piston having an elongated integral pin extending axially toward the poppet, but unconnected thereto, and an integral elongated spear, with a frusto-conical portion, extending axially in the opposite direction. In a spool valve, the spool is the valving element and has the above elements at each opposite end of the spool, namely a pilot piston with an integral pin unconnected to the spool at the inner end of the pilot piston and an integral spear, with a frustro-conical portion at the outer end of the pilot piston".

Abstract: A valve housing with a horizontal partition between an inlet port and an outlet port coacts with a hollow plunger which is vertically displaceable above that partition and has a lower end fitting into an aperture thereof traversed in an upward direction by an incoming fluid. The plunger is guided in a surrounding sleeve threadedly connected at its bottom with the valve housing and at its top with a cap having a boss traversed by a stem which is integral with a control handle threaded onto that boss. The lower end of the stem adjoins an elastic membrane which is clamped between the cap and the sleeve and which bounds a fluid space above an end wall of the sleeve; this space permanently communicates via channels in the sleeve and external flutes in the plunger with the outlet port of the housing and is further connected through a tubular neck of that end wall with the interior of the plunger and thus with the inlet port when the membrane is lifted off this neck.

Abstract: A water or other fluid containing system is protected by a thermostatically controlled drain valve having input, output, drain and control ports. A slideable barrier within the valve selectively directs the flow within the valve between the ports. A small coupling orifice through the barrier and a particularly designed closure for the orifice are provided. A thermosensitive mechanism delivers pressure to the control port to open this closure when ambient temperature drops below a predetermined level. Equal static pressures developed by flow through the orifice in turn develop unequal forces on opposite sides of the barrier, to shift the barrier, redirecting the flow within the valve.

Abstract: A self-monitoring hydraulic control valve unit has a main valve and a control valve for controlling supply of hydraulic fluid to a control duct of the main valve. A differential piston is connected in the control duct and has a longitudinal bore which forms part of the control duct, the piston acting at its smaller diameter end on the shutter of the main valve. An electrical monitoring switch such as a proximity switch monitors the position of the differential piston and, therefore, of the main valve.

Abstract: Fast-acting valve structure for rapidly evacuating a container of fire retardant material or the like comprising a pilot valve including an annular radially movable, self-centering valve seat, means for actuating the pilot valve either automatically or manually, a poppet valve, structure operably associated with the poppet valve to cause the poppet valve to be biased closed when the poppet valve is in a closed position without mechanical biasing structure, and operable to cause immediate opening of the poppet valve on initial opening of the pilot valve to permit rapid discharge of the container into a discharge manifold through structure for securing the valve structure to the container, and a resiliently mounted and sealed sleeve for guiding the poppet valve between open and closed position.

Abstract: A servo valve controlled hydrant valve for aircraft fueling has a removable adaptor for the hose coupling and includes a clamping device which assures that the servo valve is deactuated before the adaptor housing can be unbolted for removal. Deactuation of the servo valve closes the vent line in a piston-cylinder main valve arrangement thereby assuring closure of the main valve.

Abstract: A relief valve assembly particularly in combination with yieldable pit posts is provided having an elongate housing, a first load chamber at one end of said housing, an inlet aperture into said housing, a non-return valve in said inlet aperture for admitting fluid non-returnably into said load chamber, a first valve seat in said housing communicating with said load chamber, a spring loaded relief valve movable lengthwise of the housing and normally engaging said seat to close the load chamber, a second valve seat in said housing spaced lengthwise from said first valve seat and relief valve and forming therebetween a balancing load chamber, a spring loaded pilot relief valve movable lengthwise of the housing and normally engaging said second seat to close the same, and a regulated orifice means in said relief valve connecting the first load chamber and the balancing load chamber whereby said balancing load chamber is normally pressurized to the pressure of the load chamber.

Abstract: An internally piloted shut-off valve for use with cryogenic fluids incorporates a short valve housing with normally closed valve closure means incorporated therein and fluid passages with ports for fluid flow therethrough including an elongated extended stem protruding therefrom on top of which a solenoid operator is received in the stem end opening so as to define a cavity therein housing a large piston interconnected with the valve closure means by an internally piloted concentric tubing disposed coaxially with the stem and, in combination with large piston, comprising valve actuating means which permit the use of conventional solenoid operator and a trickle of cryogenic fluid converted to vapor inside pilot passage of the tubing and supplied to the cavity at atmospheric temperature when solenoid is enerized, creating pressure differential therein capable of maintaining valve open until the solenoid operator is de-energized, allowing valve closing automatically.

Abstract: A mixer unit with thermostat controlled valves for mixing hot and cold liquid includes a housing with valves for supplying the hot and cold liquid to the housing. The housing includes a mixing chamber which terminates in a discharge spout. A yoke is rockably mounted in the housing and the ends are arranged to make contact with and actuate the valves for the hot and cold liquid. A bimetallic spiral control thermostat is carried in the discharge spout and cooperates with the yoke for causing rocking movement of the yoke when the thermostat spirally moves in response to regulation of the thermostat. A device is carried at the outer end of the discharge spout for adjusting the position of the spiral of the thermostat about its axis of symmetry and thereby regulating the desired temperature of the mixed liquid.

Abstract: A pilot operated flow regulating valve which can be remotely controlled by varying the energization to a solenoid. The valve consists of a normally-closed, spring-biased, pressure-differential-actuated, main valve element and a pressure-compensated, pilot flow valve employing a solenoid acting like a remotely controllable electromagnetic spring to control the flow of fluid through the pilot valve and the pressure difference across the main valve element.