Abstract: The present invention relates to a method of controlling pressure maintenance equipment for a cooling and heating system. More particularly, the present invention relates to a method of operating and controlling, under optimum conditions, pressure maintenance equipment with multiple sensors so as to check for irregularities in the sensors which measure the same physical parameter. In the present invention, measurement values of two or more sensors are used to detect whether an abnormality has occurred in any sensor. If a sensor is determined to be abnormal, a measurement value of the abnormal sensor is excluded when determining a reference control value. Thereby, the pressure can be precisely and reliably controlled in response to actual conditions of the system.

Abstract: An apparatus and method is provided for establishing a constant flow rate of a fluid, such as a gas or a liquid, into a process system. The apparatus typically includes a fluid pressure regulator, a rotameter, and a back pressure regulator. The system may also include a throttle valve. Establishing a constant flow rate involves established a fixed pressure drop across a fixed flow resistance device, such as a rotameter. The pressure of the output of the rotameter is adjusted to be higher than the backpressure from the process system.

Abstract: A method is for the treatment of ballast water, in which the ballast water is carried into a ballast tank via a down pipe and in which an underpressure created at the upper portion of the down pipe induces the formation of gas bubbles in the ballast water. Before flowing into the down pipe, the ballast water is carried via a throttling device into a closed container at the upper portion of the down pipe, the closed container having a flow area larger than the flow area of the down pipe.

Abstract: A pressure relief valve comprises a valve body which includes an inlet bore that is connectable to a flow line, an outlet bore that is connectable to a vent line and a valve bore that extends to between the inlet and outlet bores. A valve member is axially movable in the valve bore between a closed position in which fluid in the flow line is prevented from flowing between the inlet and outlet bores and an open position in which the fluid in the flow line is permitted to flow between the inlet and outlet bores. A fluid chamber is located in the valve bore adjacent the valve member, a source of hydraulic fluid is connected to the fluid chamber, and a solenoid operated pilot valve is connected between the fluid chamber and the source of hydraulic fluid.

Abstract: The present invention describes an apparatus (1) and a method for use in regulation of the energy potential in a fluid column located within a pipeline (13), the apparatus (1) including two impellers (2), either one including a rotatable shaft (6) which is provided with a plurality of vanes or plate-shaped blades (8), the impellers (2) being disposed in a housing (4) which constitutes a portion of the pipeline (13), the apparatus (1) communicating with a load (19, 21) and/or an energy source, so that the impellers (2) of the apparatus (1) are arranged to influence the movement of the fluid column within the pipeline (13), the apparatus (1) being arranged to receive the fluid column between the shafts (6) of the impellers (2), the centre axis of said shafts (6) being substantially in the same plane as wall portions of the housing (4) upstream and downstream of the vanes, whereby the rate of the fluid column through the apparatus substantially corresponds to the rate of the fluid column immediately upstream and

Abstract: A system for distributing a fluid via a packing disposed in a container, the packing configured to have the fluid trickle from a top to a bottom thereof, includes at least one distributor member including a pressure conduit having at least one nozzle configured to discharge the fluid therethrough and a distributor channel adjoining the distributor member. A width of the distributor channel does not substantially exceed a diameter of the distributor member. The distributor channel defines at least one outlet slot disposed at a lower end of the distributor channel. The at least one outlet slot has a specified width and is configured to discharge the fluid from the distributor channel to the packing via a guide member. The distributor channel is configured to receive the fluid discharged from the at least one nozzle so as to provide a specified level of the fluid in the distributor channel. The distributor channel forms a ventable chamber above the specified fluid level.

Abstract: A method and system for controlling a pressure regulator in a gas storage system using a pressure switch as a pressure measurement device. A controller uses supply pressure data and gas flow demand data to compute a feed-forward control term, and uses data from a pressure sensor downstream of the pressure regulator to compute a feedback control term. During normal operation, with pressure downstream of the regulator oscillating about a set point pressure, on-time and off-time periods of a pressure switch are monitored, and an adaptive control term is computed which balances on-time and off-time. If the pressure sensor fails, excessive switch on-time or off-time will be detected; in response to this, the feedback control term is disregarded, and an adaptive control term is computed which aims to restore balanced on-time and off-time of the switch, thus indicating that the actual pressure is oscillating about the set point.

Abstract: Systems and methods for using a dual-path fluid routing system that uses a flow restriction device to enhance temperature and pressure control of fluid are provided. Systems and methods for using a setpoint pressure control system to accurately control the setpoint pressure of a regulator are also provided.

Abstract: A bearing chamber apparatus (2) comprising a bearing chamber (4) having one or more seals (7) which seal an interior (5) of the chamber from an exterior (24) of the chamber; and further comprising: a pump in fluid communication with the interior of the chamber; and a controllable valve (20) in fluid communication with the interior of the chamber and the outside atmosphere. The arrangement allows oil leakage from the bearing chamber to be prevented and also allows a minimum pressure to be maintained within the bearing chamber.

Abstract: A method of depressurizing a molecular sieve used in ethanol production is provided. The ethanol production system includes a plurality of on-line molecular sieve bottles for removing water from ethanol production. When the molecular sieve bottle becomes saturated with water it is taken off-line to depressurize it. The depressurization and removal of water is done from the product discharge end resulting in an approximately 5% to 10% reduction in external energy required to run the ethanol production line.

Abstract: Methods for determining one or more operating parameters for a timing protocol of a microfluidic circuit are provided. In some embodiments, wet out times are measured for certain flow channels, and start times, flow rates and/or other parameters are calculated so that the various fluids in the microfluidic cartridge arrive at certain locations at a desired time and/or in a desired sequence. To help compensate for process variations, one or more fluidic process monitor components/structures may be fabricated along with the functional components/structures of a microfluidic cartridge. Test may be performed on the process monitor components/structures to help identify process variations in the particular microfluidic cartridge at hand. By using the process monitor data, the timing protocol for a particular microfluidic cartridge may be made more accurate.

Abstract: A method and system for an integrated ejector valve assembly is provided. The integrated ejector valve assembly includes a first valve assembly configured to control a flow of relatively lower pressure fluid from a first inlet port, a second valve assembly configured to control a flow of relatively higher pressure fluid from a second inlet port, a first actuation chamber configured to close the first valve assembly, a second actuation chamber configured to close the second valve assembly, and a third actuation chamber configured to open the second valve assembly.

Abstract: Excess flow valve devices, which are responsive to pressure and flow conditions in a bi-directional system, including structures to restrict flow in one direction through openings of a stopper of an excess flow valve based on balancing forces from at least a spring and a frictional force caused by the flow. Bi-directional system employing at least one pressure delayer responsive to pressure and flow impulses to protect a tank valve of a storage tank or a regulator during a refill phase or a discharge phase.

Abstract: A pressure relief valve assembly may be coupled to one or more casings and/or tubular members to control fluid communication therebetween. The valve assembly is a one-way valve assembly that relieves pressure within an annulus formed between adjacent casings and/or tubular members to prevent burst or collapse of the casings and/or tubular members. In one embodiment, the valve assembly includes a tubular body having a port for fluid communication between an exterior of the valve assembly and an interior of the valve assembly; a chamber formed in a wall of the tubular body, the chamber in fluid communication with the port; and a closure member disposed in the chamber and configured to control fluid communication through the port in response to a pressure differential.

Abstract: A pressure control system (10) comprises a pressure modulating arrangement (14) adapted to be operated by a drive medium to modulate the pressure of a product fluid at a target location (12) towards a target pressure. The control system (10) also comprises a control device (22) configured to monitor at least one reference pressure and to control the drive medium being delivered to the pressure modulating arrangement (14) in accordance with said at least one reference pressure.

Abstract: Systems, methods and tools are disclosed for releasing pressure from closed systems. For example, in a SCR system, diesel emission fluid (DEF) can become over pressurized as it is pumped between a DEF pump and a DEF injector. A manifold may be disposed between the pump and injector. The manifold or passageway that communicates the DEF between the pump and injector includes a service port. A plug is disposed between the DEF passage and the service port or on a seat disposed between the DEF passage and the service port. A specially designed tool is employed to dislodge the plug from the seat and release pressure in the DEF passage through the tool and, optionally, through a drain hose connected to a distal end of the tool.

Abstract: A tool, method and system are provided adapted to remove a gasket from a glad hand fitting, and also to vent pressurized air from between two coupled glad hand fittings. A tool is provided with an angled tool head, adapted to be received in a glad hand fitting and to be positioned against a surface of the guard arm of the glad hand. The tip of the tool head is positioned against the gasket and the tool is pivoted against the glad hand to bias the gasket out of the recess in the glad hand fitting.

Abstract: A pressure-compensated accumulator bottle is provided. In one embodiment, the accumulator bottle includes a housing and an interior wall that generally define first, second, and third chambers within the housing. In this embodiment, a spring is disposed in the second chamber and configured to apply a biasing force on a first piston disposed within the first chamber. Further, in this embodiment, an additional piston is disposed within the third chamber and is configured to facilitate balancing of the pressure of a fluid disposed in the second chamber with the pressure of the external environment such that the magnitude of a second biasing force applied on the first piston by the pressure of the fluid depends at least in part on the pressure of the external environment. Hydraulic circuits and systems including a pressure-compensated accumulator bottle are also disclosed.

Abstract: A reductant dosing system for a machine having an engine and an exhaust system is disclosed. The reductant dosing system has a tank configured to hold a reductant, a dosing arrangement, and a supply passage connecting the tank to the dosing arrangement. The reductant dosing system also has a purging arrangement configured to direct purge fluid to at least one of the dosing arrangement and the supply passage, and a valve configured to allow reductant to pass from the tank to the supply passage and to inhibit purge fluid from entering the tank.

Abstract: A liquid mass measurement and fluid transmitting apparatus includes a container for measurement of a mass of fluid therein. A sensor is coupled to the container which measures a mass of fluid within the container independent of variations of pressure within the container. A diaphragm sensor may be located on the bottom of the container whereby electrical signals representing the mass of fluid within the cylinder are created by movement of the diaphragm caused by the mass of fluid thereon. A pressure equalizer which equalizes the pressure within the container to the pressure on the opposite side of the diaphragm allows the measurement of the mass to occur independent of any variations and pressure within the container. Liquid within the mass of liquid within the container can be accurately measured such that a desired mass of liquid may be transmitted for further use. The liquid may be vaporized and transmitted as a vapor.

Abstract: A device is described for a fluid operated valve body 200 for activation of a fluid operated tool, said valve body 200 is connected to a pipe section 11 of a pipe 160 arranged in a well 120 in a formation 140, and the device is characterised in that the valve comprises a plunger piston 5 in a channel 232, which plunger piston 5 is reset from a closed to an open position to let fluid into the tool, said resetting takes place with a piston 210, said piston 210 is brought to a number of stepwise forwards and backwards movements by increasing and decreasing, respectively, the fluid pressure P2, and said movements affect a slide body 14 which is moved stepwise, in one direction, to a position where it opens for balls 8 to fall out of channel 232, thereby releasing the plunger piston 5 to move and open for fluid flow P to the fluid operated tool.

Abstract: A method of limiting jerk in a hydraulic system of a machine includes defining a maximum pressure rate. An output pressure of a hydraulic fluid is continuously measured over time from a work port of a hydraulic valve to determine an output pressure rate. The measured output pressure rate is compared to the maximum pressure rate. A requested flow rate is adjusted when the measured output pressure rate is greater than the maximum pressure rate to decrease the pressure differential generated in response to changing the flow rate of the hydraulic fluid through the valve, which thereby limits a change in acceleration or deceleration of the hydraulic system to limit felt jerk in the machine.

Abstract: A method is provided for eliminating the risk of leakage from a first one to a second one of two fluid systems in an apparatus for handling a fluid for human consumption, with a shut-off device including a cavity and a respective valve element connecting the cavity to each of the two fluid systems, each valve means being capable of preventing any fluid communication from the cavity to the respective fluid system. When the valve element prevents any fluid communication from the cavity to the fluid systems, a fluid is supplied to the cavity and a pressure is provided in the cavity which is higher than one or each of the respective pressures in the two fluid systems, thereby eliminating the risk of leakage from a first one to a second one of two fluid systems in case of failure of the valve element.

Abstract: A control system for a vehicle includes a fuel tank selection module, a fuel depletion determination module, and a fuel pressure balancing module. The fuel tank selection module closes (N?M) of N shutoff valves of N compressed natural gas (CNG) fuel tanks, respectively, when an enable condition is met and the N shutoff valves have been open for a first predetermined period, wherein N is an integer greater than one and M is an integer less than N. The fuel depletion determination module determines whether the M CNG fuel tanks have provided a predetermined amount of fuel based a fuel parameter. The fuel pressure balancing module opens the N shutoff valves for the first predetermined period when the M CNG fuel tanks have provided the predetermined amount of fuel.

Abstract: A pressurized fluid delivery system and method that can be used to interrogate objects, such as the interrogation and detonation of IEDs. The system and method entail pressurizing a liquid within a vessel with a compressed gas source so that the liquid within the vessel is at a pressure above atmospheric pressure. The pressurized liquid, the compressed gas, or a mixture thereof is then selectively delivered to an outlet, and then discharged from the outlet to physically interrogate the object.

Abstract: A pressure regulator is provided. In one embodiment, the pressure regulator includes a piston and supply seal rings, wherein the diameter of the piston is at least half of the sum of the diameters of the supply seal rings to reduce deadband and increase sensitivity. In another embodiment, the pressure regulator has a maximum deadband of less than 200 pounds per square inch when coupled to a supply pressure of at least 1000 pounds per square inch. Other embodiments related to pressure regulators are also provided.

Abstract: A method and a device for recycling compressed gas where the compressed gas used in a compressed gas consumer, particularly a container blow-molding machine, is fed back into a compressed gas generator. In order to increase the recycling volume, the compressed gas from the compressed gas consumer is collected separately and fed back to at least a first and a second pressure range of the pressure generator separately according to pressure stages.

Abstract: A flow control screen having a fluid flow path between the interior of a base pipe and a filter medium. A valve assembly, including a piston body, a valve plug and a ball retainer having an opening, is disposed within the fluid flow path. The piston body has an internal seat and a collet assembly that is radially outwardly constrained by the ball retainer in a first operating position to retain the valve plug therein and radially outwardly unconstrained by the ball retainer in a second operating position. Reverse flow is initially prevented as internal differential pressure seats the valve plug on the internal seat and causes the piston body to shift to the second operating position upon reaching a predetermined threshold. Thereafter, external differential pressure causes the valve plug to be expelled from the valve assembly through the opening of the ball retainer, thereby no longer preventing reverse flow.

Abstract: A flow control means, such as a mass flow controller, is connected at the supply output stream of a compressed and cooled gas, such as helium, to regulate the flow rate of the gas. Specific embodiments provide in addition to the flow regulator a pressure regulator, such as for example a stepper motor controlled pressure regulator, is connected before or after the flow regulator to regulate the pressure of the output gas. The flow rate and pressure regulators have integrated controllers or user interfaces. Specific embodiments provide programmable controls with attendant user interfaces to program the desired profile of flow characteristics of pressure, including differential pressures, and flow rate. Analog and digital controller embodiments are provided.

Abstract: A disclosed gas supplying apparatus includes a pressure controller that reduces a primary pressure thereby providing a secondary pressure greater than a process pressure at which a predetermined process is performed and less than the atmospheric pressure in a secondary pipe; a pressure sensor that measures a pressure in the secondary pipe; a first open/close valve provided in the secondary pipe; an open/close valve controller that opens or closes the first open/close valve; a pressure comparator that compares the pressure measured by the pressure sensor in the secondary pipe with a first set pressure that is greater than the process pressure by a predetermined pressure; and a controller that outputs a signal to the open/close valve controller thereby closing the first open/close valve, when the pressure comparator determines that the pressure in the secondary pipe is less than the first set pressure.

Abstract: Generally, the subject matter disclosed herein relates to length-adjustable pressure-retaining components used in piping systems. In one illustrative embodiment, a device comprising a first pressure component and an adjustable spacer ring operatively coupled to the first pressure component is disclosed, wherein the adjustable spacer ring is adapted to adjust a combined overall length of said the pressure component and the adjustable spacer ring.

Abstract: A hydraulic control system is disclosed. The hydraulic control system may have a pump, a plurality of actuators, and a plurality of valve arrangements configured to meter pressurized. The hydraulic control system may also have at least one operator input device configured to generate signals indicative of desired velocities of the plurality of actuators, and a controller. The controller may be configured to receive a pump torque limit, determine a maximum pump flow capacity, and determine desired flow rates for each of the plurality of valve arrangements based on the signals. The controller may also be configured to make a first reduction of the desired flow rates based on the maximum pump flow capacity, to make a second reduction of the desired flow rates based on the pump torque limit, and to command the plurality of valve arrangements to meter the desired flow rates after the second reduction.

Abstract: A method and associated apparatus for controlling fluid levels within an axle tube, the method comprising: (a) establishing a first predetermined level of a liquid lubricant within a transmission and an electric motor operatively coupled to the electric motor, the axle tube housing the electric motor and the transmission, where a cavity interposing a wall of the axle tube and the electric motor is occupied by the liquid lubricant reservoir at a second predetermined level; and, (b) lowering the first predetermined level of a liquid lubricant within the electric motor and the transmission by changing a gas pressure exerted upon the liquid lubricant, where changing the gas pressure exerted upon the liquid lubricant within the axle tube raises the second predetermined level of liquid lubricant within the cavity.

Abstract: A fail-safe system and method for an electro-hydraulic system. The system includes a controller, sensor, directional control valve, interlock, hydraulic valve and movement actuator. The directional control valve moves when the controller is moved. The interlock is hydraulically coupled to the directional control valve; and is in active position when the directional control valve is moved, and in shutoff position when the directional control valve is not moved. The hydraulic valve has an input side coupled to a flow source and an output side coupled to a hydraulic function. The movement actuator moves the hydraulic valve to a desired position as directed by the controller when the interlock is in the active position, and does not move the hydraulic valve when the interlock is in the shutoff position. The sensor detects movement of the controller and sends a control signal to the first valve actuator.

Abstract: The invention provides an apparatus and method for enabling at least a minimum pressure and flow rate of stored NH3 from a storage tank to knives for injection into soil, regardless of ambient temperature. A pressure sensor and control valve monitors the pressure of the NH3 flow. If the sensed pressure drops below a desired minimum, e.g., 0.5 psi, a controller drives the control valve to open and also signals ramping up of a boost pump. The boost pump pumps NH3 from the storage tank to ensure maintenance of a minimum flow rate and pressure of NH3 from the tank to the soil. The pump runs on-demand only as needed, thereby reducing power requirements when the pump is not needed to supplement NH3 tank pressure.

Abstract: An apparatus and method for simulating production conditions in hydrocarbon-bearing reservoirs, as an example, by flooding of core samples from such reservoirs, are described. Full recirculation flow measurements permit several fluids (for example, crude oil, brine, and gas) to be simultaneously injected into core samples having varying dimensions. Accurate and stable back pressures are maintained at total flow rates of as high as 200 cc/min., for a large range of fluid viscosities. Accurate and stable net overburden pressures relative to pore pressure are also maintained, thereby simulating the formations at depth. Core samples from formations may also be investigated using the apparatus and method hereof, for carbon dioxide sequestration potential, as another example.

Abstract: Methods and apparatus for controlling a processing system are provided herein. In some embodiments, a method of controlling a processing system may include operating a vacuum pump coupled to a process chamber at a first baseline pump idle speed selected to maintain the process chamber at a pressure equal to a first baseline pump idle pressure; monitoring the pressure in the process chamber while operating the vacuum pump at the first baseline pump idle speed; and determining whether the first baseline pump idle pressure can be maintained in the process chamber when the vacuum pump is operating at the first baseline pump idle speed.

Abstract: A second valve is opened to combine an injection-pressure generating pressure with a maintaining pressure into an injection pressure. After the injection pressure is applied to a capillary to cause discharge of an object therefrom, an output pressure of a regulator is set to the injection pressure. Then, a first valve is opened to reapply the injection pressure to the capillary. The second valve is opened to combine a maintaining-pressure generating pressure with the injection pressure into the maintaining pressure. After the maintaining pressure is applied to the capillary to terminate the discharge of the object, the output pressure of the regulator is set to the maintaining pressure. Then, the first valve is opened to reapply the maintaining pressure to the capillary.

Abstract: An airflow control system for controlling pressure and flow through a flow passage with an upstream portion and a downstream portion includes a valve which can open to different positions for controlling pressure at a downstream portion of the flow passage; a valve actuator which receives electrical signals to control the opening and closing of the valve; and a pneumatic feedback system to stabilize the valve actuator.

Abstract: A water treatment system is provided including a disinfection system, a filter and a turbine generator. A manual pump is positioned downstream of the filter to create negative pressure to draw water through the filter. The manual pump also creates positive pressure to dispense treated water from the outlet of the system. The movement of the water through the system powers the turbine generator. The power generated can be used to monitor a characteristic of the water treatment system.

Abstract: A fluid control valve system suitable for use in fluid systems. The valve system includes at least one check valve assembly that has a controllable bidirectional flow capability. The valve system and its check valve assembly can be installed in a fluid system that contains a pump/motor to enable the displacement output of the pump/motor to be controlled. The valve system further includes a pilot valve assembly and a device for controlling the check and pilot valve assemblies. The controlling device is adapted to control the pressure of at least one pilot fluid delivered to the pilot valve assembly, which enables the check valve assembly to selectively check flow of a working fluid flowing therethrough in either of two directions.

Abstract: An assembly for holding a fluid includes an auxiliary reservoir inside a main reservoir. The auxiliary reservoir includes an auxiliary reservoir shell with a fill passage at or near its bottom. The auxiliary reservoir shell also has a vent passage at or near its top. The fill passage and the vent passage fluidically connect the auxiliary reservoir to the main reservoir. A fluid inlet is located inside the main reservoir and outside of the auxiliary reservoir. A fluid outlet located inside the auxiliary reservoir between the fill passage and the vent passage.

Abstract: A method of operating an on-off valve comprises closing one of two openings of a valve body with a seal member of a closure element within the valve body, the valve body being within an evacuation pipe connected between a process chamber and an evacuation apparatus; moving the closure element, using a linear driver, so that the seal member is moved away from the one of the two openings; and positioning the closure element into a retreat portion in an surface of the valve body, using the linear driver and a pivotal driver adapted to pivot the closure element between the one of the two openings and the retreat portion, so that the seal member is closed inside a protection seal member of the closure element to surround the seal member, thereby preventing the seal member from being directly exposed to the process gas.

Abstract: A bi-directional pressurized system with devices for and configured to mitigate issues associated with leak and creep phenomena at various stages throughout the system, including valves and controls to distribute a leaked amount of fluid prior to delivery to a pressure-sensitive destination and a pressure relief valve to bring an initial pressure within an acceptable range for distribution to reach a target pressure. A startup method for mitigating leakage of the system during a rest phase, including selectively reducing the initial pressure upstream of a pressure-sensitive destination.

Abstract: A flush valve for a waste water system comprises a valve including a fluid inlet, a fluid outlet and a main valve element adapted for movement to allow fluid flow between the fluid inlet and the fluid outlet based on a pressure differential across a portion of the main valve element. The valve also includes a vent system comprising a control chamber in flow communication with the fluid inlet of the valve and a vent outlet in flow communication with the fluid outlet of the valve, and a solenoid for venting fluid venting fluid from the control chamber to the fluid outlet. A pressure sensor, such as an electronic pressure transducer, senses the fluid pressure of fluid within the vent system. When a predetermined pressure threshold is reached or exceeded, the solenoid can be energized to release fluid from the control chamber.

Abstract: This invention describes a method for pumping or delivering fluids utilizing a flexible vessel subject to controlled pressures within another pressure vessel. The pressure vessel can be sourced with positive and/or negative (e.g., vacuum) pressure.

Abstract: A valve controller may have inputs that can be programmably set to one of several functions. A first function is for use as a event monitor, whereby a signal at the inputs may cause the valve controller to report an alert or send an alarm. A second function is to activate a self-calibration routine in the valve controller responsive to the signal where the valve controller tests and records the limits of valve travel. An optional pressure range calibration and performance tuner may also be activated in conjunction with the valve travel calibration. While the self-calibration routine is running, applying the signal a second time may cancel the self-calibration routine and restore system variables and modes to their state prior to initiating the self-calibration.

Abstract: A coupling and switching unit for transporting a gas-containing fluid includes at least one line having at least one coupling device. The at least one line is configured as a feed line for a gas/liquid mixture. A branched-off line is arranged at the end of the at least one line. The branched-off line is configured to direct the liquid/gas mixture towards an outflow. A throttle valve is arranged in the branched-off line. A valve is configured to control a discharge of a main flow of the gas/liquid mixture.

Abstract: A vacuum loader for providing granular resin material to resin material processing equipment has a loader housing, a vacuum motor, a dust filter, an air blast generator, a dump flap, and a pivoting manually releasable latch for retaining the lateral web and the loader from tilting rotation of the loader about the shaft and supporting the loader when placed in a tilted orientation; the latch being weighted to pivotally return to a web-retaining position when released by an operator.

Abstract: A pressure retention valve with integrated valve is disclosed. The pressure retention valve with integrated valve includes a housing; an outer piston positioned in the housing; a main seal between the outer piston and the housing; an inner piston positioned in the outer piston, the inner piston having a bore containing a valve; a spring between the housing and a top of the outer piston; an ambient bore in the housing above the main seal; an outlet in the housing below the main seal; and a vessel connection in the housing adjacent to the bore of the inner piston. Methods of supplying fuel to a gas consuming system using the pressure retention valve are also described.