A fully contained, mobile, compressed natural gas (CNG), compressed breathing air, or other compressed gas refueling unit, and methods of use of said refueling unit, that use a pneumatically powered booster pump to provide a consistent, high pressure filling of CNG storage tanks without using an external power source.

A gas cylinder holder may include a frame that defines a storage region for receiving multiple gas cylinders. The gas cylinders disposed within the storage region may be coupled to an outlet cabinet of the gas cylinder holder that contains components configured to output/deliver gas from the gas cylinders. The gas cylinder holder may further include a control panel configured to control the outlet cabinet components in order to dictate the gas cylinder from which the gas is delivered. The frame of the gas cylinder holder may further include at least one engagement member. A cart or other transportation mechanism may be configured to engage with the at least one engagement member of the frame of the gas cylinder holder to facilitate lifting and moving the gas cylinder cart regardless of whether or not gas cylinders are disposed within the storage region of the gas cylinder holder.

An installation for supplying gas provided with an insulating chamber including a rear wall and two side wall as well as a door that pivots about a vertical axis in order to allow opening and closing of the chamber, the installation including two multifunctional blocks that house a fluid circuit and are attached to the rear wall inside the chamber.

A fuel gas supply device for providing a fuel gas to a fuel gas supply point, including: a fuel gas reservoir that is configured to store liquid fuel gas, the fuel gas reservoir being fluidically connected to a first supply path and a second supply path, the first supply path and second supply path each including a heat exchanger configured to evaporate liquid fuel gas; and a valve device configured alternately to connect the first supply path to the fuel gas supply point and simultaneously block the second supply path or connect it to the fuel gas reservoir, and to connect the second supply path to the fuel gas supply point and simultaneously block the first supply path or connect it to the fuel gas reservoir.

Gas supply systems and methods are described for delivery of gas to gas-utilizing process tools, e.g., gas-utilizing tools for manufacturing of semiconductor products, flat-panel displays, solar panels, etc. The gas supply systems may comprise gas cabinets that are arranged with adsorbent-based and/or interiorly pressure-regulated gas supply vessels therein, and a gas mixing manifold is described, which may be disposed in the gas cabinet or operated in a standalone fashion. In one aspect, gas supply systems are described in which vessels susceptible to cooling involving diminution of gas supply pressure are processed after pressure-controlled termination of dispensing operation, for dispensing operation achieving utilization of gas remaining in the vessel after such termination.

A method for filling tanks with pressurized gas via a filling station comprising several storage containers and a fluid circuit for transferring the gas from the containers to the tanks, the circuit comprising a first end to which the containers are linked in parallel and a second end provided with a transfer line intended to be connected to the tank(s) to be filled, the circuit comprising, arranged in series between the first end and the second end, a first isolation valve, a flow or pressure regulation member, and a second isolation valve, the method comprising filling a first tank, characterized in that, on completion of the filling of the first tank and before filling a second tank, the first and second isolation valves are closed to trap a supply of pressurized gas in the circuit between said two valves and in that the supply of gas is used to refill at least one of the containers.

Method of operating a hydrogen dispensing where pressure relief is provided through block and bleed valves. After dispensing hydrogen from a dispensing station where the hydrogen is cooled during dispensing, trapped hydrogen remains in the transfer lines. During the idle time between refueling vehicles, the temperature of the trapped hydrogen increases resulting in an increase in the pressure of the trapped hydrogen. Block and bleed valves operate to relieve the pressure in the transfer lines.

The invention relates to an automatic cylinder changeover device (1), comprising two gas inlets for mounting gas cylinder banks, namely the left gas inlet and the right gas inlet, a gas outlet through which gas may be discharged and a valve suitable for connecting said left gas inlet or said right gas inlet with the gas outlet and configured for automatically reversible switching between these two connections, characterized in that the device (1) comprises an indicator, suitable for being manually set in one of two distinct positions, one of said positions indicating the left gas inlet and the other of said positions indicating the right gas inlet and comprises means for detecting the position of the indicator, including at least one sensor (5), preferably a pair of sensors (5). The invention also covers a method for monitoring a gas installation equipped with such automatic cylinder changeover device.

A dynamic control valve assembly for use in filling a liquid carbon dioxide storage and gas delivery system is provided, the assembly comprising: a valve body; an end nut with an inlet port for receiving liquid carbon dioxide; a chamber; an inlet cavity; a liquid port; a gas port; and a dynamic compound valve stem assembly for blocking the gas port while liquid carbon dioxide is delivered through the inlet port and allowing the liquid carbon dioxide to flow through the liquid port for storage in a liquid cylinder, and open the gas port and block the inlet port in order to allow carbon dioxide gasses from boiling liquid carbon dioxide within the liquid cylinder to pass through the gas port for storage in a gas cylinder until system pressure and temperature equilibrium is reached. The dynamic compound valve stem assembly comprises: a stem body having an inlet port poppet and a gas port poppet; an inlet cavity collar; and in some embodiments a collar biasing spring. The compound valve assembly is adapted to block the inlet port upon completion of the delivery of liquid carbon to the system when the system has an initial low pressure. The carbon dioxide gas may then be drawn from the gas cylinder for use in use in carbonated beverages and other applications such as agricultural and medical uses.

Method of operating a hydrogen dispensing where pressure relief is provided through block and bleed valves. After dispensing hydrogen from a dispensing station where the hydrogen is cooled during dispensing, trapped hydrogen remains in the transfer lines. During the idle time between refueling vehicles, the temperature of the trapped hydrogen increases resulting in an increase in the pressure of the trapped hydrogen. Block and bleed valves operate to relieve the pressure in the transfer lines.