Abstract: A filling valve for filling a container from a pressurized liquid filled bowl is disclosed. The filling valve includes a housing with a liquid filling orifice through it and a liquid flow valve for opening and closing that orifice. A gas flow tube extends through the liquid flow valve element and projects both above and below it. A pressure responsive piston is supported on the gas flow tube. A cover is located over the gas flow opening at the top of the gas flow tube and includes a closure element ball. A sleeve supports the closure element above the top opening of the tube. A spring holds the closure element off the top opening of the tube. A guide sleeve outside the supporting sleeve is connected with the gas flow tube. A spring biases the supporting sleeve out of the guide sleeve.

Abstract: An apparatus is provided for dispensing a liquid additive to the surface of a receding liquid in a pressurized vessel, particularly for automatically dispensing a liquid oil spreading agent to the surface of ballast water contained in a pressurized tank of a cargo carrier having oil based material at least partially floating on the surface thereof.

Abstract: A fuel dispensing nozzle having an aspirator valve which closes an aspirator line when there is a high negative or positive pressure in the fuel tank being filled, the closing of the aspirator line decreasing pressure in a chamber so that a shaft is released whereby the nozzle automatically shuts off. The nozzle also has a poppet valve controlled with the fuel valve of the nozzle, which poppet valve seals a vapor return line through the nozzle when the fuel valve is shut off.

Abstract: A machine for filling beer kegs via a movable head which carries a change-over valve in series with a beer inlet valve, the change-over valve being arranged so that during the beer save operation at the end of each filling cycle the beer between the inlet valve and the change-over valve is isolated so that it remains sterile and can be used in the next filling cycle.

Abstract: A pressure fueling adapter for aircraft has spring loaded primary and secondary nested poppets for controlling fluid flow therethrough, the primary poppet operable by engagement with the position lever of a fuel nozzle and the secondary poppet responsive to pressure differentials to allow inlet fluid flow and check back flow. A cam interengagement mechanism may be manually actuated to connect the primary and secondary poppets for simultaneous movement by the position lever of the fuel nozzle to defeat the secondary poppet check, for defueling purposes.

Abstract: Apparatus for transferring material from one vacuum tight hopper to another includes funnel means having a valve member at one end adjacent the one hopper for controlling flow and valve means the other end of the funnel means for similarly controlling flow. Between the other end of the funnel means and the valve means there is provided collector door means movable between open and closed positions to prevent the material to be transferred from impinging on the sealing surfaces of the valve means.

Abstract: Apparatus for the bulk delivery of a volatile liquid including a mobile delivery vessel having at least one compartment for the bulk storage of the volatile liquid. Each compartment has a liquid outlet controlled by a remotely controllable liquid outlet valve and a vapor inlet controlled by a remotely controllable vapor inlet valve. The opening and closing of these valves are interlocked and, optionally, the closing of the vapor inlet valve is delayed a predetermined time after the closing of the liquid outlet valve.

Abstract: The filling valve arrangement for carbonated beverages includes a head part and a lower part movable in two opposite vertical directions with respect to the head by means of a cylinder piston unit, the lower part enclosing a liquid controlling valve chamber with a valve member, the bottom of the lower part being provided with a liquid discharge passage supporting a sealing ring compressable by the cylinder piston unit against the rim of a container to be filled, and liquid inlet conduit arranged in lateral wall of the lower part to communicate with the liquid controlling valve chamber. An air return pipe is slidably supported by the filling valve the vertical position of which is controlled by a separate driving mechanism.

Abstract: Container filling apparatus having a novel, multi-purpose nozzle including a valve designed to control injection of a liquid or semi-liquid product into the container and a further means for evacuating any froth or foam from the container while simultaneously sensing when the level of product within the container reaches the predetermined full level. The valve comprises a hollow cylindrical body defining a chamber for receiving froth and foam and discharging same through a drain port. Passing longitudinally through this body member is a tubular piston having a product tube portion extending therefrom and dimensioned to fit through the neck of the container to be filled. The product tube has an exit port near its distal end and surrounding the product tube is a combination venting and level sensing tube. The space between the outside of the product tube and the inside of the venting/level sensing tube communicates with the froth/foam receiving chamber in the valve body.

Abstract: A novel valve mechanism using the so-called "rolling seal" type flexible cover tube. This cover tube is fitted fluid-tight on the outer circumference of a generally cylindrical inner movable valve member which is formed with an axial bore providing a fluid passage and which is further formed at its outer circumference with a valve port having communication with the axial bore. The cover tube has its at least one end radially turned or rolled radially outwardly to provide a turned annular lip where it is fitted on a fastened outer cylinder. Thus, the valve port is opened and closed by the outward and inward rolling motions of the annular lip of the cover tube due to the relative movements in the axial direction between the outer cylinder and the inner valve member. By the use of the valve mechanism thus constructed, a charging valve for a gas lighter can be provided.

Abstract: A balanced system for transferring a volatile liquid fuel into a tank therefor while avoiding passage of fuel vapors into the atmosphere. Vacuum assist means is provided in the system to compensate for lack of integrity of the fit between a removable fuel dispensing nozzle and the tank filler tube. The system includes a vapor pump to carry vapor from the tank being filled, and a valved bypass means to conduct liquid away without impairing vapor passage. The system also includes a check valve in the vapor passage to prevent escape of vapors during periods of non-use. The system further includes a trim valve connecting the vapor pump outlet to the vapor pump inlet so that the desired vapor/liquid exchange ratio can be attained during calibration.

Abstract: The filling device for use in connection with a rotary filling machine, includes a housing enclosing an air-return chamber, a vertically reciprocating air-return pipe projecting with its upper part into the air-return chamber, a rack-and-pinion drive rotatably supported in the air-return chamber and having a rack secured to the upper part of the pipe and a pinion supported for rotation on a shaft passing through the housing and driven via a lever by a cam secured to the non-rotating part of the filling machine.

Abstract: A system for filling and emptying a fluid storage tank includes an air pressure source 11, a vent valve 12, and a fill valve 14. The vent valve 12 includes first and second housing portions 23 and 24 and a main valve member 18. A coil spring 20 acts between the second housing portion 24 and a valve stem 19 to close the main valve member 18 and to bias the housing portions 23 and 24 together. A piston 21 cooperates with the second housing portion 24 to define an expansible chamber 39, and air pressure from the source 11 enters the chamber 39 to move the piston 21 and open the main valve member 18. A secondary valve member 40 isolates the fill valve 14 from the air pressure source 11 until the main valve member 18 is opened, and then communicates air pressure to the fill valve 14 to open the fill valve 14 and permit filling or emptying the tank.

Abstract: An automatic shut-off nozzle has liquid flow through its vapor return automatically stopped when liquid has filled the vapor line sufficiently in a predetermined period of time to move a float valve to block the vapor return line. This blocking of the vapor return line by the liquid increases the pressure in the tank being filled to cause the automatic shut-off nozzle to stop liquid flow. If the pressure in the tank increases beyond a predetermined pressure when the float valve is in its blocking position, the increased pressure is vented. The automatic shut-off nozzle also stops flow in response to the tank being filled to a predetermined level with liquid or to the pressure in the tank exceeding a predetermined pressure even when there is no blocking of the vapor line by the float valve.

Abstract: A filling device for use in a bottling machine, which device is provided with a sealing member for closing the opening of a bottle, a filling tube for supplying the bottle with a filling liquid and an exhaust tube for discharging the air from the bottle to the outside during the filling operation. When the opening of the bottle is closed by the sealing member, the filling liquid is fed into the bottle through the filling tube and the air in the bottle is simultaneously discharged outside. The filling device is provided with a valve mechanism which receives the pressure of the air remaining in the bottle as an indication pressure when the filling liquid in the bottle blocks the lower end of the exhaust tube. The valve mechanism closes the exhaust tube or the filling tube when the indication pressure exceeds a predetermined value.

Abstract: Liquid flow through an automatic shut-off nozzle is automatically stopped when the presence of liquid at a predetermined location in the vapor return means is sensed by an independent sensor arrangement. The automatic shut-off nozzle also stops flow in response to the tank being filled to a predetermined level with liquid or the pressure in the tank exceeding a predetermined pressure.

Abstract: A vapor-recovery system in which a coaxial vapor-recovery fuel dispensing nozzle cooperates with portions of the vehicle fuel receiving and storage system to prevent the escape of vapors into the atmosphere during refueling. The fuel-dispensing nozzle comprises a rigid, tubular vapor-recovery member coaxially arranged around the nozzle discharge spout to define a vapor-recovery passageway therebetween. A seal means is located inwardly of the fuel tank fillpipe opening to sealingly engage the vapor-recovery member when the nozzle discharge spout is operatively inserted into the fillpipe so that substantially all refueling emissions will flow into the vapor-recovery passageway of the vapor-recovery member.

Abstract: Multi position flow check valves for both liquid and vapor filler conduits having essentially two positions, a closed position, and a wide open flow position to activate the latch, the valve being automatically closed from the flow position under hazardous conditions including equipment accidents and fires, and open only when manually opened for latching purpose in tank filling operations at bulk storage stations. One hazardous condition includes an appreciable stretch strain exerted on filler hoses connected between the storage supply tank and the mobile delivery tank sufficient when dangerous to close the valves and prevent serious escape of gases in event of hose rupture. Non-extendible elements providing the differential criteria also serve as remote shut-off controls, including manual, automatic and thermal for safety termination of a refilling operation.

Abstract: A system for transferring a volatile liquid fuel into a tank therefor, while avoiding passage of fuel vapors into the atmosphere. Vacuum assist means is provided including a reciprocatory, fuel actuated tandem motor and pump combination, to assure maintenance of a condition in the system which will prompt removal of fuel vapors from the tank being filled.

Abstract: A valve means for a fuel dispensing nozzle located in the nozzle discharge spout at the outlet end thereof for sealing the outlet end to prevent the flow of fuel and fuel vapors out of the discharge spout when the nozzle vapor-seal valve is closed. The valve means is responsive to the operation of the vapor-seal valve so that when the vapor-seal valve is closed when the nozzle is not in use, the valve means is closed and so that when the vapor-seal valve is open when the discharge spout is operatively inserted into a fill pipe of a fuel tank, the valve means is open. To this purpose, means are provided to establish communication between the valve means and the flow passage upstream of the nozzle flow control valve and between the valve means and the flow passage in the discharge spout. In one embodiment, the valve means located in the discharge spout at the outlet end thereof is a pinch valve, and in another embodiment, the valve means is a wafer valve.

Abstract: An automatic bottom load and unload railway tank car includes a tank body having a quick fill and unload lading valve in the tank bottom. A vent valve is also located in the tank bottom and a vent conduit extends from the vent valve up to the top of the tank to a tank vent located in the top of the tank. At a tank car loading and unloading site, the tank car is spotted over an actuating assembly located between and below the tracks. The actuating assembly includes a lading valve actuator and a vent valve actuator which move upwardly and engage the tank bottom to open the lading valve and the vent valve. A lading conduit is connected to the lading loading and unloading valve and to a storage container. A vent conduit is connected between the vent valve and the upper portion of a storage container. During loading, lading passes from the storage container through the lading valve into the tank, and air and vapors pass from the tank to the top of the storage container.

Abstract: An automatic shut off dispensing nozzle has a nozzle main body, a discharge pipe disposed down stream of the main body, a fluid passage provided substantially straight in the main body, a valve mechanism having an axial line crossing the fluid passage, a lever provided to the main body for the operation of the valve mechanism, a first sliding shaft interlocking with the lever and having the same axial line as that of the valve mechanism, a second sliding shaft provided on the same axial line of the first sliding shaft for the operation of the valve mechanism, rollers provided for causing engagement between each of the sliding shafts, a diaphragm for the retention of the rollers, a negative pressure chamber including the diaphragm, an apparatus for generating a negative pressure which is communicated to the negative pressure chamber, and an atmosphere introducing port provided in the discharge pipe which communicates with the negative pressure chamber.

Abstract: A filling machine for filling of liquids into a container has a vessel and filling elements operatively connected with the liquid vessel and including a liquid input conduit, an advance and return gas conduit, and a pressure relief conduit. Elements for establishing a pressure difference between the interior of the container and the interior of the liquid vessel are provided, including a channel adapted to be maintained at a pressure which is lower than that in the liquid vessel and higher than that of the outer atmosphere, and a branch conduit communicating the interior of the container with the interior of this channel. A one-way valve is arranged in the branch conduit and is operative for closing the same when the pressure in the channel increases and opening the same when the pressure in the channel decreases relative to the pressure in the interior of the container.

Abstract: A fuel system in which a fuel dispensing nozzle removably and sealably engages a fuel tank. Pressure sensing means in the nozzle monitors the degree of vacuum established adjacent to the nozzle seal, and in response thereto, actuates a vacuum control apparatus. The latter then functions by regulating the volume of vapor flow withdrawn from the fuel tank, to maintain a desired degree of vacuum adjacent to said seal whereby to avoid or minimize the intake of air into the fuel system.

Abstract: An apparatus for dispensing liquid or pasty substances to gelatin capsules and the like, in particular for dispensing pharmaceutical products thereto. In order to maintain the substance to be dispensed in relative motion to prevent deleterious thickening, the apparatus includes a reciprocating dispensing control plunger which periodically enters a capsule or container to be filled. If no container is present and no dispensing is to take place, the control plunger retreats into a position wherein a separate metering piston continues to transport the material but returns it to a storage container via a conrol channel in the control plunger.

Abstract: The automatic fill-stop valve passes the liquid filling a tank. A level-sensing tube passes vapor until the tank liquid level rises that high, and, thereupon, passes liquid. Serial orifices in the sensing passage produce a valve closing signal when the liquid level reaches the sensing tube to automatically stop the filling of the tank.

Abstract: The present invention relates to valves for racking machines which are known as isobarometric machines comprising an upper reservoir which is actuated by a rotational movement and which is provided with a certain number of valve devices or tap devices making it possible to simultaneously fill several containers or bottles.

Abstract: A liquid level sensor for use with a container filling device, in particular jars, which includes a dispensing tube from which the liquid falls downward and outward in a paraboloid bell-shaped stream, and which has a return air pipe and a ball valve sensor to stop filling when liquid droplets coat said ball. The air pipe and sensor are both located in the space enclosed by the bell-shaped stream. A sealing device contacts the jar rim during filling.

Abstract: A gasoline dispensing and vapor recovery nozzle, and adaptors and fittings as may be required to modify certain gasoline tank fill pipes to consistent geometry and dimensions, such fittings including extension to the liquid conveying portion of the dispensing nozzle and extension of the venturi vent tube of the automatic shut-off system of the nozzle, thereby permitting early detection and shut-off of fluid flow upon rising liquid levels in the gasoline tank and fill pipe.

Abstract: The device includes a housing having an inlet opening which supplies fluid essentially tangentially through a short passage to a chamber being approximately spiral-shaped. The chamber surrounds the axis of a discharge opening located in the bottom of the housing. The spiral chamber imparts an angular momentum to the fluid causing the fluid to flow evenly down the inside face of the outer wall of the container.

Abstract: There is disclosed a liquids container provided with duct means for conducting fluids into and out of the container, the container comprising head and base portions and side walls connecting the head and base portions, and the duct means being secured to and extending into the container from the head portion. The duct means comprises three concentric pipes, the outermost one of which opens into the container near its head portion and the other two of which open into the container near its base portion, with the innermost one of the latter two pipes opening out at a greater distance from the container head portion than the other one of the two pipes. The duct means also comprises valve means normally closing the conduits and operable to open the conduits. There is further disclosed drawoff, cleaning and filling heads which can be connected to the container duct means and can be used to open different combinations of the conduits to enable fluids to be supplied to and removed from the container.

Abstract: Nozzle for a closed system holding a volatile fuel. The nozzle is adapted to sealably engage the filler pipe of a fuel tank whereby to avoid passage of fumes to the atmosphere during a fuel transfer operation. The nozzle will automatically discontinue fuel flow in response to a malfunction in the closed system, which would otherwise cause recycling of the fuel through the nozzle and back to its source.

Abstract: A safety valve for use in fuel dispensing systems including a vapor recovery system and having a valve body, first and second inlets in the body, first and second outlets in the body, first and second, separate, fluid flow passages in the body and extending between respective ones of the first and second inlets and outlets, two valve seats in the body, one in each of the passages, a shaft extending through and rotatable in the body adjacent the valve seats, first and second clapper valves in the body, one in each passage, each clapper valve having a limited lost motion connection to the shaft to be rotatable therewith, with limited lost motion, between positions seated against and spaced from the associated valve seat, a pair of springs, one for each valve, biasing the associated valve towards its associated seat, and a holding device for holding the shaft in a position of rotation within the body wherein the valves are spaced from their associated seats, and for sensing an unsafe condition in the vicinity of

Abstract: A pressure control and regulating device for the proper filling of pneumatic tires and the like which device includes a filling stem receiving end for removeably attaching the same to a tire during filling and a pressure line receiving end to which the source of air pressure is attached with a pressure release, spring calibrated mechanism arranged between such ends which spring will open the unit for release of pressure to atmosphere upon the pressure reaching a predetermined level, the release directing the air from the unit past a whistle producing passage for the production of a constant pitch sound.

Abstract: A beer bottling operation includes pressurizing the interior of an empty bottle prior to pouring beer into the bottle in two steps. In the first step, according to a first preferred embodiment, the interior of the bottle is pressurized by air fed from a pressurized air source, while in the second step the interior of the bottle is pressurized by means of pressurized air fed from a bottling tank where the beer to be bottled is stored. According to a second preferred embodiment, in the first step the interior of the bottle is evacuated substantial to a vacuum condition, while in the second step the interior of the bottle is pressurized by means of carbon dioxide gas fed from the bottling tank, and in the subsequent step of pouring beer into the bottle the beer is poured from the bottom portion of the bottle.

Abstract: In a counterpressure filling machine for filling a liquid in bottles or the like, the filling member is provided without a feed pipe. The filling member includes a valve housing with a centering bell mounted on its lower end. A gas pipe laterally enclosed by a filling sleeve is positioned within and extends downwardly through the housing and the centering bell. The gas pipe is a fixed member and the filling sleeve is axially displaceable relative to it between an open position and a closed position. In the closed position the lower end of the filling sleeve bears against a sealing seat on a repelling shield located at the lower end of the gas pipe.

Abstract: A filling machine for filling open top containers with pressurized liquid, especially carbonated liquid, or liquid which readily foams, having rotary turret mounting filling valve assemblies, each of which includes a cylinder with its foot valve and a piston with its plug valve, as generally known in the art. Before filling starts, a measured charge is trapped in a measuring chamber. Each foot valve is provided with a perforate wall exposed to atmosphere on its underside, and a flexible diaphragm overlies the perforated all and is exposed to the filling charge. At the start of the container filling operation, the foot valve is moved downward, while in sealed relation with the cylinder, to first deblock the plug valve and then decompress the measured charge.

Abstract: Safe tank filling apparatus primarily for pesticide tank use, comprising a tank filling tube and a reverse flow prevention means associated therewith which includes a multiple valve assembly made up of a housing of three sections, two of which provide a flow through passageway to the filling tube and in which is located a one way valve assembly permitting flow through to the filling tube but not in reverse, and a vent valve assembly in the remaining housing section held in closed position in response to pressure within the housing, but openable in response to development of a partial vacuum condition within the housing.

Abstract: A system for loading and/or unloading at sea a transportation vessel conveying incoherent products comprising ship mooring means, an arrangement for transferring or handling incoherent goods comprising a loading and/or unloading tower supported by the bottom of the sea and partially submerged as well as a movable loading boom associated with said tower, said mooring means being separated from or independent of said cargo transfer or handling arrangement.

Abstract: Filling apparatus comprising a filling valve which controls the flow of a carbonated liquid from a reservoir to a container. The filling valve includes a tube which extends from the reservoir to the container for equalizing the pressure in the container as the container is filled. When the liquid in the container reaches a predetermined level, venting by the tube automatically ceases. A valve control automatically closes the valve in response to the reduced flow into the container as the pressure builds up within. The initial opening of the valve to permit the flow of liquid into the container and initial opening of the pressure communicating tube is controlled by the two different cams of the actuating mechanism.

Abstract: A back pressure filling valve for bottles comprises a central ventilation tube slidably mounted within a valve body member with clearance therebetween to provide an auxiliary passage for the air or gas. A frusto-conical check valve of elastomeric material controls this passage. A liquid control valve is mounted between an outer cylindrical body member and the valve body member and comprises a diaphragm of elastomeric material mounted on the outer cylindrical body member and having a central opening engaging the valve body member.

Abstract: A push-fit inlet valve assembly for the opening into the fuel chamber, such as in a lighter, consists of a flexible valve member and a rigid stem fitted into a bore in the valve member. The valve member, tightly secured in the fill opening, normally effects the closure of the opening preventing any escape of the pressurized fuel. To add fuel, the stem is pressed inwardly and displaces the valve member from sealing contact with the opening and affords communication between the interior of the chamber and the ambient atmosphere. Such communication between the chamber and the atmosphere is provided by a groove formed in the outer surface of the valve member which is opened to the chamber when the stem presses the valve member inwardly.

Abstract: The disclosure is of a gasoline-dispensing nozzle converted, by an adapter, from a conventional configuration to a vapor recovery type.

Abstract: A tire inflator includes a pressure vessel filled with non-flammable compressed gas. A tubular valve housing is secured within the inflator outlet and includes radial ports opening to the bore of the housing and located adjacent an outer apertured end wall. A tubular valve body is slidable within the housing bore and includes a conventional tire valve. The inner ends of the housing and valve body each include a slightly raised rib in concentric relationship. A rupturable diaphragm secured to the ribs locates the valve body relative to the housing and seals the space therebetween. Over pressure in the vessel ruptures the diaphragm between the valve body and housing and moves the valve body outwardly into engagement with the end wall of the housing. The pressure fluid within the pressure vessel escapes to atmosphere through the space between the valve body and housing and through the radial ports.

Abstract: A safety arrangement for a gasoline dispensing station equipped with a vapor recovery system. Gasoline vapors displaced from a motor vehicle fuel tank during filling are collected through the dispensing nozzle, and are directed first through a flexible hose attached to the nozzle and then through a pipe to an underground storage system. A break-away valve is placed in the pipe near where it enters the ground such that in the event of an accident, as by an automobile running over the gasoline dispensing console, the break-away valve will automatically close to shut off the vapor recovery system. This minimizes the danger of an explosion or fire possibly caused by an open vapor recovery system.

Abstract: A relief valve having a main passage normally closed with a main valve member and a vent passage normally closed with a vent valve member, the vent valve member being constructed to open the vent passage upon application of a predetermined pressure into the main valve passage to thereby prevent application of greater than said predetermined pressure to the outlet of the valve is disclosed.

Abstract: A transport tank and a spreader tank with a communicating conduit system for the transfer of liquid sludge to the latter tank. A conduit shut off and venting system includes a receptacle into which a first conduit discharges with a remaining flexible conduit segment leading to the spreader tank. The receptacle mounts an air cylinder provided with a piston actuated valve assembly operable to close a receptacle intake port and open a receptacle vent for venting and evacuation of the flexible conduit segment. When oppositely positioned the valve assembly closes the vent for normal fluid transfer. A valve in circuit with a fluid level sensing device controls air cylinder operation.

Abstract: A vapor recovery nozzle for use in filling vessels with a liquid and for recovering liquid vapors generated by the liquid such as the filling of vehicle fuel tanks. The nozzle includes a valve system including a first valve for the liquid and a second valve for the vapor and an interconnection whereby the vapor valve is always open whenever the liquid valve is open. It also includes a common actuator for the two valves and an automatic shutoff system for the liquid valve, which automatic shutoff system includes a connection to the vapor line when the nozzle is being used in vacuum assisted vapor recovery systems and further forms part of a drain system for a vapor collection hood surrounding the spout of the nozzle so as to drain liquid received therein from the vapor flow path to preclude such vapor from contaminating components of a vapor recovery system.

Abstract: In a liquid supply nozzle having a nozzle valve opened and closed by the manipulation of an operating lever, a nozzle pipe having an air vent hole near the front discharge end thereof, and an automatic stopping mechanism operating when air supply thereto is shut off by the closure of the air vent hole to close the nozzle valve irrespective of the operation of the operating lever, there is provided a mechanism which normally keeps the air vent hole open but operates when the nozzle is pressed against the rim of a liquid filling inlet designed for supplying a liquid of a kind other than that of the liquid specified for the nozzle to close the air vent hole. As a result of the closure of the air vent hole by this vent hole closing mechanism, the nozzle valve is closed by the automatic fuel supply stopping mechanism even when the operating lever is operated, whereby supplying of the specified liquid into a liquid filling inlet designed for another kind of liquid is effectively prevented.

Abstract: A liquid handling system for filling tanks, such as tank trucks, particularly suitable for handling volatile fluids, employing a fill conduit and an emergency shutoff valve located at the upper end of the fill conduit. The emergency valve employs an annular, normally open, valve element axially displaceable to a shutoff position upon the liquid level within the tank reaching a predetermined maximum depth. Valve element operation is regulated by a control piston subjected to subatmospheric pressures produced by liquid flow through the valve and upon the liquid level reaching a predetermined depth the control piston is actuated to cause the valve element to terminate fluid flow. The emergency shutoff valve may be employed in conjunction with a variable rate flow valve connected in series therewith to produce a versatile tank filling system.