Abstract: A vent and shutoff valve is provided, and includes an upper portion with an inlet for receiving fluid and an outlet for venting vapors. The upper portion mounts to an outer surface of a fuel tank. The lower portion extends into the fuel tank. The lower portion includes an elongated tubular valve housing, and a sliding sleeve housing disposed within the valve housing that defines a fluid pathway. The sliding sleeve housing includes a bypass port that fluidly couples the fluid pathway with a fluid channel formed between an outer surface of the sliding sleeve housing and an inner surface of the valve housing. The lower portion also includes a sliding sleeve disposed within the sliding sleeve housing that forms a fluid chamber between an outer surface of the sliding sleeve and an inner surface of the valve housing. The fluid chamber is fluidly coupled with the fluid channel.

Abstract: Apparatus to control a fluid flow are disclosed. An example fluid flow control apparatus described herein includes a signal stage comprising a signal stage relay having a supply plug being operatively connected to a valve seat at a first end and an exhaust seat at a second end and a seal operatively coupled to the supply plug such that the seal provides a feedback area to apply a fluid pressure feedback force to the exhaust seat.

Abstract: A water appliance including a water flow control unit for controlling a water flow. The control unit includes a flow restrictor and a leakage stop in serial fluid communication with the flow restrictor. The leakage stop cuts off the flow when a pressure difference between an inlet and an outlet of the flow restrictor is below a predetermined value.

Abstract: A pilot valve is switchable between snap and throttle modes. The pilot valve supplies output gas to a process control valve and has an adjustable biasing member for applying an adjustable force to a pilot plug in a pilot body interior. An opposed force is applied to the pilot plug to overcome the adjustable force and the output gas.

Abstract: A liquid level controller including a pilot valve switchable between snap and throttle modes. A displacer translates changing liquid level in a tank into movement that is transferred to the pilot valve which will provide output gas to a control valve to allow or to prevent the discharge of fluid from the tank. The pilot valve has a throttle supply inlet and a snap supply inlet and a single output passage. When the pilot valve is in the throttle mode, the snap supply inlet is a vent passage and when the pilot valve is in the snap mode, the throttle supply gas inlet is a vent passage.

Abstract: An overflow prevention system and method for storage tanks includes a flow disturber situated in the tank fill tube, a fluid level sensor for sensing fluid level in the tank, and an actuator that causes the flow disturber to move toward the fill tube inlet in response to rising fluid level sensed by the fluid level sensor. The flow disturber is arranged to travel between a first position in which it does not cause turbulent flow in the fill tube and a second position in which it causes turbulent flow. The actuator is responsive to the fluid level sensor to move the flow disturber to the second position when a predetermined fluid level is reached. The transition to turbulent flow triggers the automatic shut-off feature of the dispensing nozzle to prevent the tank from being filled beyond the predetermined level.

Abstract: Fuel shut-off device for use in a diesel fuel tank to discontinue fuel flow to a fuel pump comprises a valve seat forming a fuel flow opening for fuel to flow from the fuel tank to the fuel pump, a fuel control valve cooperably disposed relative to the valve seat to control fuel flow from the fuel tank to the fuel pump, and a spring biasing the fuel inlet valve to a closed position against the valve seat. A diaphragm is provided having a first valve-actuating side for moving the fuel inlet valve relative to the valve seat against bias of the spring and a second side. The second side is communicated to a control chamber having an inlet orifice that is communicated to the fuel tank and an outlet orifice that is communicated to said fuel pump.

Abstract: An improved liquid level controller is shown having a pneumatic pilot assembly located outside the main controller housing. A filter housing is also located outside the main housing. The controller internal components include a torque bar acted upon by a displacement member, a lever and an adjustable connector for interconnecting the torque and lever. A biasing spring contacts the torque bar to balance the force exerted on the torque bar by the liquid displacement member. The pneumatic pilot is actuable by it movement of the lever to provide a selectable output for controlling a desired liquid level within the vessel interior.

Abstract: An automatic drain system for removal of condensate from compressed air systems comprises a reservoir having an inlet for entry of condensate and outlet for the periodic discharge of accumulated condensate. The discharge, through a ball valve in the outlet, is controlled by a float structure responsive to the level of accumulated liquid condensate in the reservoir. An air discharge tube is provided for the exiting of air when the float (and liquid level) is at the highest position. The air discharge tube is in fluid communication with an air cylinder outside of the reservoir. The air cylinder is coupled to the ball valve to open the valve and allow liquid condensate to exit in response to air pressure transmitted from the air discharge tube. As the liquid exits the liquid level and float are lowered. When float is at its lower position, the float structure closes across the air discharge tube and the cycle repeats.

Abstract: A valve device for controlling the filling level of cylinders and the like ith liquefied gases, comprising an upper connecting body which can be coupled to a cylinder for liquefied gas and forming a tubular gas infeed element which ends with a coupling body which is associable with a lower connecting body in order to retain a membrane for closing openings for feeding gas into the cylinder, and a valve control element which is controlled by a float and interacts with the membrane; the device further comprising clinching means for the mutual clamping of the upper connecting body and the lower connecting body.

Abstract: A liquid level controller is shown having a housing with a rear wall. A shaft has a first end which extends through the rear wall to a liquid displacement member located within a liquid containing vessel. A second end of the shaft joins a pair of oppositely extending arms. Each of the oppositely extending arms is rotationally mounted on the housing generally parallel to the rear wall in a bearing. Vertical forces responsive to changes in liquid level act on the displacement member and are transmitted as a force tending to rotate the oppositely extending arms. A lever pivotally mounted to the housing is interconnected with a torque bar which, in turn, connects to the oppositely extending arms of the shaft. A valving assembly is engaged by the lever to provide an output for controlling liquid level within the vessel. The valve assembly includes a pneumatic pilot with a contact point which is engageable by a pin carried on the lever.

Abstract: An overfill preventing valve (20) is adapted to be operatively interposed in a flow path between a fluid source (21) and a compressed fluid storage cylinder (22) to prevent the cylinder from being overly filled. The improved valve includes an elongated tubular body having a first seat (25), a first space (26), a second space (28), a second seat (29), a third space (30), a third seat (31), a fourth space 37 and an entrance portion (32) communicating with a source. A passageway (33) continuously communicates the first and fourth spaces. The second and fourth spaces communicate with the interior of the cylinder. A float (36) is contained within the body for movement toward and away from the first seat in response to the liquid level in the cylinder. A valve member (38) is mounted on the body for sealed movement toward and away from the second seat. This valve member separates the first space from the second space. The valve member is biased to move away from the second seat.

Abstract: An improved overfill shut-off system for a liquid storage tank includes a passage having an inlet end and an outlet end, a valve seat in the passage, a plunger that is movable within the passage for the purpose of engaging the valve seat to impede flow of liquid in the passage, and a guide member for guiding movement of the plunger. The plunger and the guide member are sealed with respect to each other and together define a control space. A first port is defined in the plunger for communicating the control space with an upstream end of the passage, and a second port is defined in the guide member for communicating the control space with a downstream end of the passage. A valve is provided for selectively impeding fluid flow through the second port in response to the level of a float member within the storage tank. When liquid level in the storage tank reaches a predetermined maximum, liquid flowing through the passage will be permitted through the first port, but not through the second port.

Abstract: This invention relates to an automatic shut-off valve arrangement for use in fluid transfer systems. In particular, the valve arrangement or assembly may be mounted in a fluid tank or other type of fluid containment zone to automatically shut off flow from a source, when the desired volume of fill is reached. The assembly is for use in automatic or semi-automatic fluid handling systems which include specialized nozzles and coupling systems which eliminate spillage in the process of connection and disconnection of the nozzle and the tank inlet.

Abstract: A drain valve including a housing engaged on a base, compressed air may flow into the housing via an inlet of the base, a casing disposed in the upper portion of the housing, a piston slidably engaged in the casing, a rod extended downward from the piston into an outlet of the base for blocking the outlet, a puncture formed in the upper portion of the casing, a plug disposed for blocking the aperture and can be opened by a float. The condensate is accumulated within the lower portion of the housing. Most of the parts are disposed within the upper portion of the housing.

Abstract: An automatic condensate draining device includes a housing which confines a condensate collecting chamber and having a base provided with a condensate discharge opening, and a condensate inlet opening in communication with the condensate collecting chamber. A valve seat unit has an axial through opening to intercommunicate the condensate collecting chamber and the condensate discharge opening. A poppet valve has a piston section in sliding contact with the inner surface of a lower portion of a tubular cover member, and a valve head to accordingly block the axial through opening of the valve seat unit. The piston section and the tubular cover member confine a volume variable chamber. Condensate and high pressure air enter the condensate collecting chamber via the condensate inlet opening and force the poppet valve upward so as to enable the valve head to block the condensate discharge opening.

Abstract: A self-contained tank filling fitting having dual operation wherein the fitting may be used with a gravity fluid supply system or a pressurized fluid supply system. The fitting includes an elbow having an upper end closed by a removable cap, and a pressurized filling port located in the bend of the elbow aligns with a tank port to reduce resistance to pressurized fluid filling. An automatic differential pressure valve controlled by a float operated vent automatically closes the pressurized filling port upon the tank being filled.

Abstract: A flow-regulating valve, with a body forming a flow channel between an entrance port and an exit port, has a shutter in the form of an apertured backing plate and an apertured slide which adjoin each other along a plane inclined or parallel to the axis of at least one of these ports so as to be accessible, for inspection or repair, through a neck with an opening offset from both ports but normally closed by a cover. The ports can therefore be formed by nipples rigid with the valve body, e.g. welded thereto, not requiring disconnection from their conduits. The slide is shiftable by a rod extending parallel to the aforementioned plane, specifically horizontally when the valve is controlled by a float in an adjoining tank. In order to isolate the interior of the tank from the flow channel during repairs, a thruster in the tank can be manually operated from the outside to move the rod into a limiting position in which the passage traversed by that rod is plugged.

Abstract: A device for the automatic regulation of fluid flows through an aperture for use with immiscible liquids having differring densities, wherein the volume, weight and shape of a floatable plug are selected to provide a negative buoyancy with respect to the less dense liquid and a positive buoyancy with respect to the denser liquid, and with the buoyancy of the plug in the various liquids determining whether the fluids will be permitted to flow through the aperture.

Abstract: The housing of the filling device mounted on the tank wall defines a chamber wherein a spring-activated cut-off valve is mounted. This valve comprises a head cooperating with a valve seat at the end of a supply duct opening into the chamber and a piston-forming body separating the chamber into two volumes. The housing presents openings between the tank inner volume and the frontmost chamber volume, and a duct between the backmost chamber volume and the tank inner volume. A no-return valve, which only lets liquid to the tank inner volume, is mounted in this duct. At the end of this duct a valve controlled by the float in the tank is mounted.

Abstract: A gas regulation device to delay for a predetermined time the closing of a gas actuated main valve of the type having a main valve conduit connected to the main valve for carrying the gas which actuates the main valve. The regulation device comprises a first conduit which can be disposed in the main valve conduit to form a portion thereof and a check valve which is disposed in the first conduit so that gas can pass through the first conduit only in one direction. A bypass conduit is connected to the first conduit across the check valve such that gas can pass from the first conduit on one side of the check valve through the bypass conduit to the first conduit on the other side of the check valve. A flow regulation device is disposed in the bypass conduit to limit the flow of gas through said bypass conduit such that the pressure drop or increase required to open or close the main valve is delayed for a predetermined time.

Abstract: A filler valve for a gas tank, comprising a valve body to be mounted in the wall of the tank, to the upper end of which body a filler hose can be connected, and in the wall of which valve body outlet ports are provided, two shut-off valves being provided in the valve body, between which shut-off valves a passage is present and furthermore the space between the two valve members is in open communication with the space under the valve members, said latter space comprising a passage opening controlled by a float, and in which furthermore the valves are constructed so as to be slidable one within the other and cooperate with one and the same seat.

Abstract: A steam trap is provided having a main locking member disposed in a supply pressure chamber and cooperating with a main valve seat, a pressure chamber provided in the low pressure end and an adjustment member mounted in the pressure chamber which is responsive to the pressure therein, and which is coupled with the main locking member by means of a shaft. The shaft has a control conduit longitudinally extending therethrough coupling the supply pressure end with the pressure chamber. A pilot valve seat is provided on the main locking member at the inlet opening of the control conduit and a pilot locking member is provided which cooperates with the pilot valve seat. An actuating device is provided for the pilot locking member which is controlled by the condensate to be discharged. The steam trap is particularly characterized by the provision of a seat element on which the main valve seat is formed which supports the pressure chamber on a neck member having outflow openings for the condensate.

Abstract: A liquid-level valving device, particularly useful as an air-relief valve, comprises a housing including a first chamber having a control member axially movable in an opening therein, and a second chamber defined by a piston carried at the opposite end of the control member and a cylinder fixed to the housing. The second chamber has a small vent opening through which the control member extends, the latter having an axial bore establising communication between the two chambers. The cross-sectional area of the first-chamber end of the control member is less than that of its second-chamber end, and the mouth of the bore at the former end of the control member is of larger diameter than that of the vent opening in the second chamber, such that upon an increase in pressure in the first chamber, the pressure in the second chamber is likewise increased to cause the control member to be moved further into the first chamber to open the valve.

Abstract: In an automatic valving device, the combination comprises a container, an exhaust valve mounted in a lower portion of the container, an arrangement for actuating the exhaust valve, a pilot valve mounted in an upper portion of the container and coupled to the actuating arrangement, and an elongated guideway extending generally between the pilot valve and the exhaust valve. A float is movably mounted on the guideway and is operatively coupled to the pilot valve. The float is movable along a length of the guideway between an upper pilot valve opened position and a lower pilot valve closing position. Magnetic members are mounted on the guideway and the float respectively. At least one of the magnetic members is magnetized, and the magnetic members are shaped for magnetically attractive engagement therebetween.