Abstract: An integral valve and tank assembly (12) for a pulse-jet air cleaner includes a discharge pipe (22) connected to and extending directly into a tank (14). The inlet end (28) of the discharge pipe (22) terminates adjacent to a relatively larger opening (30) in the tank wall (14b), over which a diaphragm assembly (32), cover (34), and compression spring (38) are mounted so as to provide improved constructional and operational efficiency.

Abstract: A rolling diaphragm regulator valve is affixed in a globe type valve body and includes a nonstretchable fabric reinforced elastomer diaphragm for covering and uncovering, by rolling action in response to changes in pressure in a control chamber, a plurality of apertures in a baffle positioned between the valve body inlet and outlet. An axially movable spring-biased nose piece, mounted behind the diaphragm, provides a surface over which the diaphragm is draped for controlling substantially all movement of the diaphragm. A travel indicator is operable by movement of the nose piece to provide a visual indication of the position of the valve. In one embodiment the baffle is notched adjacent to a peripheral mounting surface of the diaphragm, whereat the ends of the fabric reinforcement are exposed to permit entrained gases to escape. Other embodiments include areas of the diaphragm, exposed to the apertures, that have pinholes in the elastomer surface and that have the fabric surface exposed.

Abstract: A valve body defines an inlet and an outlet with a valve seat therebetween. A flexible diaphragm valve member has an outer portion supported by the valve body and a movable inner portion which cooperates with the valve seat to control the flow of liquid from the inlet to the outlet. A small bleed hole extends through the diaphragm valve member and provides a limited flow of liquid which is adapted to be vented to the outlet through a slightly larger vent passage defined by the valve body. In one embodiment, the vent passage is opened and closed by over-center snap movement of a flexible concaved bimetal disc positioned within the vent passage. The disc is heated by a small electric resistance coil when it is desired to open the valve, and when the coil is deenergized, the disc is cooled by the liquid flowing within the vent passage. In another embodiment, the vent passage is opened and closed by a flexible member in the form of a diaphragm disposed adjacent a metal disc forming an armature for a solenoid.

Abstract: The pilot operated valve assembly includes a flexible diaphragm (A) which selectively engages a valve seat (B) to open and close a fluid passage through the valve. The diaphragm has a plurality of filtering apertures 20 and an inward peripheral attaching projection 80. A diaphragm insert (C) is frictionally received in the diaphragm. The diaphragm insert has a pilot supply aperture 74 in fluid communication with a peripheral recess 76 extending inward from a peripheral edge. The diaphragm filtering apertures 20 are disposed in fluid communication with the peripheral recess 76 and the pilot supply aperture 74. The insert peripheral edge has a peripheral valley 82 for receiving the peripheral projection 80 of the diaphragm. The insert has a pilot outlet aperture 66 which is selectively opened and closed by an armature assembly (D). A guide shell (E) aligns the armature assembly (D) with the pilot outlet aperture 66 and defines a pilot reservoir with the diaphragm (A).

Abstract: A gas regulator valve comprising a housing with an inlet and an outlet and a partition wall or the like, which divides the housing into two chambers. The inlet communicates with the first chamber and with the outlet via a main valve. Between the two chambers a pressure equalizing passage for the gas is provided, and between the second chamber and the outlet a narrow channel is provided which has a valve seat facing toward the second chamber. The valve seat cooperates with an externally regulated valve body. When the valve is to be utilized in connection with a breathing valve for breathing masks, it also comprises a respiration sensor in the form of a membrane or the like. Via a link arm system or the like, the movement of the sensing membrane is transmitted to the valve body via a needle or a rod which passes through the channel.

Abstract: A self-contained, pilot-operated valve is provided with a plug for controlling the flow of a fluid through an orifice between inlet and outlet openings. A spring located about a stem projecting from the plug urges the plug into sealing engagement with the orifice. By means of a bellows surrounding the spring and having one end connected to the stem, an interior space is created, which space is in communication with the inlet opening through a restricted conduit. The interior space is also in communication with the outlet opening via a pilot valve. Operation of the pilot valve controls the pressure in the interior bellows space and hence the degree to which the bellows is compressed. This compression affects the plug stem and hence the position of the plug with respect to the valve seat.

Abstract: A pilot operated solenoid actuated valve assembly having a differential pressure sensing diaphragm for opening the main valve in response to loss of pressure through a pilot flow valve from a control pressure chamber. The pilot valve-armature is housed in a non-magnetic guide which is sealed about the diaphragm to form the control pressure chamber. Tubular pole segments surround the guide and define a magnetic air gap. An auxiliary pole piece is loosely received in the guide and is spring biased away from the armature. The pole piece enables the armature to be held fully open at a substantially reduced level of voltage from the actuation or service voltage.

Abstract: Upon energization a solenoid (58) activates a pilot valve means (44,46) for opening a pilot flow passage (34) causing flow from a pilot portion (52) of the valving chamber. Flow from the main valving chamber (18) and through a bleeder passage (50) is insufficient to prevent a loss of pressure in the chamber (52) and the pressure in valving chamber (18) urges diaphragm pad (29) upward away from contact with valve seat (26) to permit flow from chamber (16) to outlet (20). A diaphragm insert (30) has a portion (32) with a lip (68) extending into a narrow section (66) of outlet (32) for providing a downstream restriction to maintain sufficient pilot circuit differential to provide valve movement until rim (68) moves out of passage (66) thus providing any desired stroke by adjusting the level of (66) to prevent trapping fine particles of foreign matter at the valve seat.

Abstract: A straight-through electrical activated valve is disclosed having a flapper closure element responsive to differential pressures of a valve cavity and fluid pressure upon the opposing sides of the diaphragm. A pilot valve (or electric solenoid) is provided to drain the valve cavity. The flapper closure element seats against the body of the valve in such a manner that the valve operates as a reverse check valve. If a straight line is extended from the valve seat plane of the valve body the resulting angle with the perpendicular axes would be obtuse.

Abstract: A fluid flow control valve in which flow from an inlet (14) to an outlet (16) is controlled by engagement between a surface (92) and a seat (90). The surface (92) is displaced from the seat (90) when a closure member (44) is lifted to permit flow from a control chamber (26) through a bore (42). The resultant pressure drop in the chamber (26) enables pressure externally of the chamber (26) to displace the wall (34) which lifts the spigot 40 and hence the surface 92. When the closure member (44) re-seats, the chamber (26) can fill through a bore (56) and the wall (34) returns to its initial condition to close the valve. An operating member (66) protrudes through a shower rose (20). When the member (66) is pushed up, the piston (70) attempts to slide in the cylinder (74) and causes a pressure increase which thus displaced the cylinder (74 ) and hence the closure member (44).

Abstract: An automatic dishwasher includes a water inlet line, a flow control valve assembly, a wash water introducing means for introducing wash water into a container which is adapted to receive dishes, and control means for selectively controlling the flow control valve assembly. The flow control valve assembly includes a first flow control valve which is selectively actuated by a first solenoid coil and a second flow control valve which is selectively actuated by a second solenoid coil. A first ferromagnetic member is disposed between a first end of the solenoid coils and a second ferromagnetic member is disposed between the other end of the solenoid coils. The solenoid coils are so interconnected that when an actuating potential is applied across them, they are electrically in series. The series connection of the coils allows the coils to be configured such that a significant saving in the cost of coil wire is achieved over parallel connected coils.

Abstract: A blast aerator for fluidizing granular material, comprising a container connected to a supply of compressed air, an aerator valve casing having a diaphragm chamber therein, a flexible resilient diaphragm dividing the chamber into first and second portions, a conduit connected between the container and the first portion, an air blast outlet connected to an outlet port in the first portion, the diaphragm including a valve member initially closing the port by the resilience of the diaphragm, a bleed opening in the diaphragm for pressurizing the second portion when the first portion is pressurized, and a control valve for opening and closing a vent outlet from the second portion, the control valve when closed allowing pressurization of the second portion, and, when open, exhausting the pressure therefrom, whereupon the pressure in the first portion opens the valve member and quickly releases the compressed air from the container to produce an air blast through the outlet.

Abstract: An automatic dishwasher includes a water inlet line, a flow control valve assembly, a wash water introducing means for introducing wash water into a container which is adapted to receive dishes, and a control for selectively controlling the flow control valve assembly. The flow control valve assembly includes a first flow control valve which is selectively actuated by a first solenoid coil and a second flow control valve which is selectively actuated by a second solenoid coil. A first ferromagnetic member is disposed between a first end of the solenoid coils and a second ferromagnetic member is disposed between the other end of the solenoid coils. The solenoid coils are so interconnected that when an actuating potential is applied across them, (a) they generate magnetic fields of the opposite polarity, and (b) they are electrically in series.

Abstract: The electro-magnetic valve includes a hydraulic pilot control consisting of an inlet and outlet with a concentric valve seat, sealable by a flexable diaphragm. The inlet and outlet are both arranged on one side of the diaphragm and a hydraulic pressure is arranged on the other side of the diaphragm. A filling aperture from the inlet to the pressure chamber and a central pressure relief aperture from the pressure chamber to the outlet are provided, the central pressure relief aperture being connected to a bypass in the valve body. An electro-magnetic means for opening the pressure relief aperture is also included.

Abstract: An overflow preventing valve apparatus comprises a valve main body provided at a terminal end of a fluid supplying system passage, a main valve fixed to a separating membrane stretched within the valve main body to separate an upper chamber and a lower chamber, when the main valve is displaced upwards and downwards accompanied by deformation of the separating membrane and closing a fluid supplying passage upon moving downwards, a pilot valve for opening and closing the main valve in response to the opening and closing of the pilot valve itself, where the pilot valve is opened by a fluid supply starting operation, a lock mechanism for locking the pilot valve in an open state, a first lock releasing mechanism responsive to the detection of a dangerous fluid level which could lead to an overflow, for releasing the locking operation by the lock mechanism to close the pilot valve, and a second lock releasing mechanism responsive to the closing operation of the main valve at the time when the supply of fluid is sto

Abstract: For controlling the rate of supply of water to a watering bowl, a diaphragm valve with a diaphragm is placed in the water connection system, one side of the diaphragm resting against a barrel-like part, the space within the barrel being joined up, for example, with the bowl while the space round the barrel on the same side of the diaphragm is joined up with the water inlet so that, when the diaphragm is moved clear of the end of the barrel, water may make its way from the inlet into the bowl. On the opposite side of the valve diaphragm there is a pilot control space into which water may make its way through a small hole in the diaphragm and out of the pilot control space into the bowl through a pilot valve system in the form of an opening and a moving pilot valve which is worked by a lever or the like in the bowl, by a float or by a pilot diaphragm acted upon by the liquid level in the bowl.

Abstract: A valve body defines an inlet and an outlet with a valve seat therebetween. A flexible diaphragm valve member has an outer portion supported by the valve body and a movable inner portion which cooperates with the valve seat to control the flow of liquid from the inlet to the outlet. A small bleed hole extends through the diaphragm valve member and provides a limited flow of liquid which is adapted to be vented to the outlet through a slightly larger vent passage defined by the valve body. In one embodiment, the vent passage is opened and closed by over-center snap movement of a flexible concaved bimetal disc positioned within the vent passage. The disc is heated by a small electric resistance coil when it is desired to open the valve, and when the coil is deenergized, the disc is cooled by the liquid flowing within the vent passage. In another embodiment, the vent passage is opened and closed by a flexible member in the form of a diaphragm disposed adjacent a metal disc forming an armature for a solenoid.

Abstract: The pilot operated valve assembly includes a flexible diaphragm (A) which selectively engages a valve seat (B) to open and close a fluid passage through the valve. The diaphragm has a plurality of filtering apertures 20 and an inward peripheral attaching projection 80. A diaphragm insert (C) is frictionally received in the diaphragm. The diaphragm insert has a pilot supply aperture 74 in fluid communication with a peripheral recess 76 extending inward from a peripheral edge. The diaphragm filtering apertures 20 are disposed in fluid communication with the peripheral recess 76 and the pilot supply aperture 74. The insert peripheral edge has a peripheral valley 82 for receiving the peripheral projection 80 of the diaphragm. The insert has a pilot outlet aperture 66 which is selectively opened and closed by an armature assembly (D). A guide shell (E) aligns the armature assembly (D) with the pilot outlet aperture 66 and defines a pilot reservoir with the diaphragm (A).

Abstract: An automatic on-off sprinkler head including a housing that defines a primary chamber and a pilot chamber enclosed thereby; an inlet orifice and outlet orifice both opening into the primary chamber; a primary valve seat located between the inlet and the outlet orifices; a movable valve closure comprising a flexible diaphragm wall portion separating the primary chamber from the pilot chamber, the valve closure remaining against the valve seat to prevent fluid flow between the inlet and the outlet orifices in response to less than a predetermined differential pressure across the wall portion and movable away from the valve seat to permit fluid flow between the inlet and outlet orifices in response to a differential pressure greater than the predetermined pressure; a fill port providing limited fluid flow between the inlet orifice and the pilot chamber; a release port for discharging fluid from the pilot chamber; and a pilot valve controlling fluid flow through the release port.

Abstract: The invention concerns a valve with servo-command, consisting of a seat (5) and a poppet valve (6) mounted in a valve body (1). Movements of the poppet valve (6) are prompted by the pressure prevailing in the control chamber (7). The intake of fluid under pressure in this chamber (7) takes place through an intake conduit (22) which opens across from the upstream edge of the seat (5) in relation to the direction of flow of the fluid, in proximity to the smallest cross section for passage of the fluid for all the possible positions of the poppet valve in relation to the seat (5).

Abstract: A valve, notably for use as a demand valve in breathing apparatus, has a pressure-responsive diaphragm coupled to a separate control member which lies in the path of a jet of gas which vents from a control chamber through an orifice, gas being continuously supplied to the control chamber. Deflection of the diaphragm in response to pressure changes in a second chamber caused by inhalation and exhalation of the user of the apparatus pivots the control member towards or away from the jet orifice to control the rate of venting from the control chamber and thereby vary the pressure within the control chamber. Flow of gas through the valve to the user of the apparatus is controlled by a flexible disc which in turn responds to the pressure in the control chamber. By employing a separate diaphragm and control member the former can be optimized for pressure-response while the latter can be optimized for valve-regulation by interaction with the gas jet from the control chamber.

Abstract: A diaphragm for a flush valve is made of molded rubber with a plastic insert for strengthening the diaphragm. The insert includes reinforcing means located at the points where the diaphragm is attached to the valve parts. There is also a plurality of spaced, rigid sections placed between the points of attachment. Connecting means are provided for connecting the reinforcing means and the rigid sections together. The connecting means is arranged to permit flexibility of the diaphragm in two planes. Thus, the diaphragm is permitted to flex both in the plane of the diaphragm and perpendicular to the diaphragm.

Abstract: A fuel pressure regulator assembly comprising a housing, a diaphragm separating the housing into a first and second chamber. The housing has a radial inlet extending to the first chamber and a connector having an axial outlet is mounted in the housing and extends axially into the first chamber. The connector supports a sealing ring. The diaphragm supports a valve member that is adapted to engage the sealing ring, and a spring in the second chamber urges said valve member against the sealing ring. The fuel pressure regulator assembly includes provision for increasing the fuel regulation pressure by varying the effective diaphragm area.

Abstract: A remote-control valve having at least a two-part housing with a pressure inlet and adjacent outlet in one part, and which valve is opened and closed by a flexible continuous impermeable diaphragm at the base of a pressurizable frusto-conical chamber in the other part of the housing. This substantially conical chamber contains a free rubber ball which closes the apex opening from the chamber when the chamber is pressurized through a continuously open bypass from the inlet duct around the diaphragm in the first part of the housing. A projecting means such as a pin insertable through the apex of the chamber moves the ball away from its outlet duct to reduce the pressure in said chamber so that the pressure in the inlet duct will flex the diaphragm to open the valve to the outlet duct.

Abstract: A solenoid operated valve with a primary diaphragm type valve member controlled in accordance with the fluid pressure on opposite sides thereof and a solenoid operated pilot valve having a fixed axially extending pilot valve outlet tube extending through a central opening in the diaphragm valve member and operable for selectively referencing the fluid pressure on one side of the diaphragm with the valve outlet pressure.

Abstract: A sprinkler system control valve has a "wet" valve which is maintained seated against a mains water inlet by water pressure applied to a piston of larger effective area than the wet valve. The sprinkler system downstream of the wet valve is charged with air at a relatively low pressure, this air pressure also being supplied to an actuator chamber so as to maintain a deadweight in a lifted position. Upon operation of a sprinkler head the air pressure in the system drops rapidly, causing the deadweight to descend, operating a trip valve through a self-locking cam. Once operated, the trip valve vents the pressure on the piston to an exhaust port allowing the wet valve to open, and at the same time cutting off the actuator chamber from the sprinkler system by the entry of a sealing O-ring into an internal bore in the wet valve housing.

Abstract: In a discharge valve for liquids, and especially for use in lavatories, comprising two bodies provided with hollow spaces separated from each other by a circular diaphragm, the central portion of which normally seals an inlet conduit for water which, jointly with the discharge conduit for water, opens into one of said hollow spaces, while the other one of said hollow spaces is connected by means of respective channels provided with flow restrictors, one to the inlet for water and the other one to the outlet for water, the said channels crossing the peripheral zone of said diaphragm, the following combination of improvements:(a) The channel intercommunicating the hollow spaces opens in the water inlet conduit in such a manner as to proceed upstream;(b) The guide of the piston of the plug sealing the water outlet ends in a projection in the shape of a truncated cone;(c) The sealing diaphragm has a thickening in the shape of a truncated cone; and(d) The zones surrounding the flat contact surfaces between stiff m

Abstract: A diaphragm valve operated by a solenoid pilot for opening and closing the gasoline passage from a pumped inlet to the nozzle of a gasoline dispenser. A valve body forms an internal fluid passage for series installation with that of the dispenser. An annular seat surrounds the body passage at an intermediate location while an upstream facing diaphragm cooperates with the seat to open and close the passage to fluid flow. A spaced apart valve plate in combination with the diaphragm form a liquid tight chamber into which gasoline at the inlet can enter through restrictive one-way orifices. Fluid pressure in the chamber aided by a bias spring urges the diaphragm toward the set in opposition to pump pressure at the inlet.The pilot valve is spring biased toward a closed relation and is loop connected from the chamber to the outlet. Energizing the pilot effects a reduction in chamber pressure enabling relatively greater inlet forces against the diaphragm to move the diaphragm toward open position.

Abstract: A fluid pressure operated pilot control diaphragm valve having the pilot opened in response to energization of an electromagnetic actuator. The actuator includes a movable armature means operable to open the pilot and stop means movable with the armature for limiting the amount of opening of the pilot. The stop means includes means operative to prevent closing of the pilot when the armature means is subsequently moved by fluid pressure opening of the diaphragm valve.

Abstract: Pressurized control signal apparatus is disclosed, which being supplied with air from a source of variable pressure, is operative to produce a control signal essentially independent of variations in the supply pressure. In one aspect of the invention, the control signal is amplified in volume of flow; in another, it is generated in response to temperature. The apparatus is specifically adapted to effect regulation of air flow in a variable air volume (VAV) temperature conditioning system in response to temperature in a conditioned zone, wherein the supply air for the apparatus is derived from a temperature conditioned air distribution duct of the VAV system.

Abstract: A valve body defines an inlet and an outlet with a valve seat therebetween. A flexible diaphragm valve member has an outer portion supported by the valve body and a movable inner portion which cooperates with the valve seat to control the flow of liquid from the inlet to the outlet. A small bleed hole extends through the diaphragm valve member and provides a limited flow of liquid which is adapted to be vented to the outlet through a slightly larger vent passage defined by the valve body. The vent passage is opened and closed by over-center snap movement of a concaved bimetal disc positioned within the vent passage. The disc is heated by a small electric resistance coil when it is desired to open the valve, and when the coil is deenergized, the disc is cooled by the liquid flowing within the vent passage.

Abstract: A flush valve including a housing, a removable partition sealingly engaging said housing and defining a primary chamber and a control chamber; the housing including an inlet port in the primary chamber for connection with a source of flushing fluid, and an outlet port in the primary chamber for dispensing the fluid; a valve element connected with the partition for closing the outlet port; first biasing means for producing a force on the partition to urge the valve element to close the outlet port; a passage interconnecting the primary control chambers for enabling equalization of pressure therebetween; an actuator mechanism including an actuator valve connected with the control chamber and an actuator member for setting the actuator valve to the open position to vent the control chamber and enable the valve element to move away from the outlet port and open the flush valve; and an actuator control mechanism driven by the partition as the valve element moves away from the outlet port, for driving the actuator

Abstract: A valve having a flexible diaphragm for opening and closing the valve. The diaphragm is biased into valve-closing position by a ridge, formed in the valve body, which presses the diaphragm toward the valve seat. A rigid backup washer is secured to the diaphragm solely by an elastomeric type adhesive. A bleed hole in the diaphragm establishes communication between the valve inlet port and a chamber on the side of the diaphragm opposite the valve seat. The bleed hole is in the margin of the diaphragm which is sandwiched between two portions of the valve body.

Abstract: Slow closing faucet control cartridge for removably mounting in a faucet casing. The depression of an operating knob activates the faucet and rotation of the knob permits the mixing of hot and cold water inlets.

Abstract: In a flush valve having a housing, a moveable partition sealing engaging the housing, and defining a primary chamber and a control chamber; an inlet port in the primary chamber and an outlet port in the primary chamber; and a valve element connected with the partition for closing the inlet port and the outlet port; the improvement including: an actuator mechanism including an actuator valve connected with the control chamber; an actuator member for setting the actuator valve in the open position to vent the control chamber and enable the valve element to move away from the outlet port and open the flush valve; and an automatic release member moveable with the actuator member for setting the actuator valve to the open position and moveable independently of the actuator member to reset the actuator valve in the closed position; and an actuator control mechanism driven by the partition as the valve element moves away from the outlet port for driving the automatic release member to reset the actuator valve to the

Abstract: An essential contactless control means is provided for operating a device which mixes and discharges two fluid media such as water faucet for discharging a temperature controlled mixture of hot and cold water. In the case of the water faucet, for example, the hot and cold water flow to the mixing chamber of the faucet is controlled by a pair of magnetic valves, preferably operated by an electronic circuit, which opens the valves when the hand or an object approaches the control antenna of the circuit. In this device, expensive separate additional controls are eliminated by providing the magnetic valves with manually adjustable knobs.

Abstract: The invention relates to a fluid flow control valve of the type in which flow through the valve is controlled by movement of a chamber wall caused by fluid flowing into the chamber through a restricted inlet and a cleaning element is provided to clean the inlet. In this invention, the cleaning element is longer than the restricted inlet and is movable between a first position in which it does not extend through the restricted inlet and a second position in which it extends completely through the restricted inlet. The cleaning element is a rod-like element of self-supporting flexible synthetic plastics material and has a limited inherent rigidity enabling it to force dirt and scale from the restricted inlet.

Abstract: A valve member including a flexible diaphragm movable into and out of engagement with a valve seat to close and open the valve, respectively. A rigid support plate rests against the face of the diaphragm opposite the face which engages the valve seat. A stem projects from the plate, through a hole in the diaphragm and into the orifice surrounded by the valve seat. The diaphragm and plate are not rigidly secured together, so that the entire diaphragm is free to flex with respect to the support plate. A pilot passageway may extend completely through the plate and stem. The stem is long enough such that the lower end of the pilot passageway is below the plane of the valve seat even when the valve is open. An abutment, such as an outwardly projecting bead, on the lower end of the stem prevents accidental separation of the plate and diaphragm before they are assembled with a valve.

Abstract: A device for automatically selectively watering plants in a predetermined order for predetermined times comprises a casing which is connectable to a source of water under pressure and which houses a turbine wheel arranged to be driven by the water and to drive a set of gears which form a speed reducer the output shaft of which extends out of the casing and carries a plurality of cams spaced apart along the shaft and each arranged to operate a valve of the pilot-operated type, the valves being identical, juxtaposed in a straight line, and connectable to pipes provided with watering nozzles.

Abstract: A fluid pressure operated pilot control diaphragm valve having the pilot opened in response to energization of an electromagnetic actuator. The actuator includes a movable armature means operable to open the pilot and stop means movable with the armature for limiting the amount of opening of the pilot. The stop means includes means operative to prevent closing of the pilot when the armature means is subsequently moved by fluid pressure opening of the diaphragm valve.

Abstract: A flush valve of the tilting pilot valve type in which stops are provided for the manually or pedal-actuated handle so as to provide a low volume or a normal volume as desired. In one form an attachment having a low volume stop is provided on the conventional handle housing. In another form the conventional housing is replaced by a modified housing provided with the low volume stop. In still another form an attachment in the form of a clamp is provided on the handle to provide the low volume.

Abstract: A shutoff valve installed on the discharge side of a pump to automatically shutoff hazardous liquid flow in the event of a rupture on the downstream side of the shutoff valve. The shutoff valve operates in response to a predetermined pressure drop across a valve and may also function to stop the driver of the pump and close the shutoff valve in response to excessive temperature conditions. Various installational arrangements may be provided in order to associate the shutoff valve with the hazardous fluid flow line.

Abstract: A diaphragm controlled solenoid valve is disclosed having a small pressure inlet orifice in the diaphragm and is characterized by an internal groove provided in the bonnet with at least a portion of the groove being in the same vertical plane as the orifice. The groove is at least as wide and preferably is of greater width than the diameter of the orifice. A manually operable cam is provided for lifting the actuator of the solenoid in case of its malfunction. The spring which normally actuates the diaphragm is eliminated.

Abstract: A two-way valve has a valve clack cooperating with a seat and mounted with play in a mobile core of an electromagnetic actuator to provide fluid-assisted opening of the valve. The mobile core moves in a chamber connected to the fluid inlet by a restricted annular passage disposed about the core. Movement of the mobile core towards the open position produces an increase in the cross-sectional area of the restricted passage, so that the fluid assistance is initially great, but then decreases.

Abstract: A drain valve for a compressed air system automatically discharges liquid separated from system air from a container in which the separated liquid is trapped when the trapped liquid activates the drain valve. A spring biases the valve element of the drain valve to an open position to drain the trapped liquid during system shut-down and is positioned in an outlet passage of the container so that the spring is accessible for replacement without disassembly of the drain valve. A float in the container is responsive to the level of trapped liquid to open communication between the system pressure and a chamber on the upper side of a diaphragm type valve actuator to offset the system pressure in a chamber on the lower side of the valve actuator so that the spring and the pressure on the upper side of the valve actuator acting on the valve element moves the valve element to its open position for discharging the trapped liquid.

Abstract: A control valve for use in conjunction with the control system of water powered field irrigation equipment has a valve housing provided with an inlet opening, an outlet opening, and a flow passage connecting the inlet and outlet openings. The flow path is selectively blocked and unblocked by a valve element actuated by a pilot valve controlled remotely by an operator of the equipment in order to determine the direction of rotation of a drive motor which propels a portion of the equipment about a pivot axis as a function of the position of other portions of the equipment. A fluid actuated motor provided with an eccentrically mounted output cam permits control of the time the end unit of the equipment, which unit controls the operation of other units disposed between the end unit and the pivot axis, is on and off in order to obtain a continuous speed control of the equipment.

Abstract: A valve having a delayed action closing means comprises a membrane positioned above the valve seat and partitioning the interior of the valve casing into a first and second chamber, a water wheel in the first chamber positioned to be rotated by the incoming water, a shaft from the water wheel acting on a train of gears in the second chamber, an auxiliary valve actuated by the train of gears after the passage of a predetermined quantity of water, a by-pass provided from the upstream part of the valve and leading into the second chamber, and a connection from the auxiliary valve leading into the downstream part of the valve.

Abstract: A pressure gas engine such as compressed air turbine in which gas flow to a pressure responsive rotor is controlled by a movable valve that is operated by a bellows with means connecting each side of the bellows to the gas in the turbine for substantially equal gas pressure on both the inside and the outside of the bellows. There is also provided a speed control member that closes the gas inlet but that can be opened to any desired degree to achieve a desired speed. A bleed line leads from one side of the bellows so as to regulate the pressure on that side and a speed responsive throttle valve is provided to meter the amount of flow through the bleed line thereby maintaining the desired speed dependent upon the setting of the main supply valve.

Abstract: A pressure gas engine such as a compressed air turbine in which gas flow to a pressure responsive rotor is controlled by a movable valve that is operated by a bellows with means connecting each side of the bellows to the gas in the turbine for supplying substantially equal gas pressure to both the inside and the outside of the bellows, a gas control member that closes a gas inlet independently of the bellows operated valve, a bleed line leading from one side of the bellows so as to regulate the pressure on that side and a speed responsive throttle valve in the bleed line to meter the amount of flow through the bleed line thereby maintaining the desired speed, all regulated and dependent upon the setting of an adjustable throttle valve.

Abstract: The solenoid plunger normally closes the center vent hole in the diaphragm so inlet pressure is applied through the bleed hole to the space above the diaphragm resulting in enough pressure to close the diaphragm on the valve seat. When the solenoid is actuated, the plunger is lifted, allowing water to flow through the vent faster than it can flow through the bleed hole. This lowers the pressure above the diaphragm so inlet pressure can move the diaphragm from the seat and full flow can take place. The bleed hole is quite small. To prevent entrained particles from reaching and plugging the bleed hole, an arcuate groove having a width less than the bleed hole diameter is molded into the diaphragm to trap particles in the groove and prevent the particles from reaching and closing the bleed hole.