Abstract: On cold filling of pressure containers the filling gas is cooled before introduction into the pressure container to be filled. On completion of the filling process the pressure container is sealed in a pressure-tight manner. As the gas warms up the pressure in the pressure container rises rapidly. According to the invention, the pressure container is cooled before the introduction of the filling gas. The filling gas cools rapidly by means of heat transfer to the pressure container, whereby the filling capacity of the pressure container is considerably increased. Said method is particularly suitable for the filling of small tanks, in particular, for gas-driven vehicles and fuel-cell systems.

Abstract: Device for filling an aerosol container with a liquid using in particular a filling arrangement equipped with a pusher element (12), includes a cup designed to accommodate the liquid for filling the aerosol container, this cup being provided on its bottom with an injection opening adapted to the valve of the aerosol container, a piston head (7) acting by pushing on the filling liquid contained in the cup for transferring it from the cup to the container. The piston head (7) comes in the form of a scraper in continuous contact with the inside wall of the cup during the transfer operation. The piston head (7) is shaped to work with the cup after transfer to keep the piston head (7) within the cup to form an airtight wall that retains the residual liquid that has not been transferred within the cup.

Abstract: An installation for filling an aerosol container with liquid, whereby the aerosol container including at least one frame, elements for holding a scoop of liquid for filling on the frame at a mount point located above the point where the aerosol container is mounted, a pushing element with a removable piston head, and elements that indicate when the piston head is not attached to the pushing element. The indicating elements assume the shape of a movable stop between an active position—in which the stop is placed on the trajectory followed by the scoop during its installation in its mount point on the frame and prevents the installation—and an inactive position—in which the stop allows the installation, whereby this stop, returned to the active position, is held in the inactive position by the piston head, in the attached state of the piston head on the pushing element.

Abstract: A system and a process for providing acetylene, preferably at a high purity level (e.g., comprising 100 parts per million (“ppm”), or 10 ppm, or 1 ppm, or 100 parts per billion (“ppb”), or 10 ppb, or 1 ppb or less of solvent), to a point of use, such as a semiconductor manufacturing process, is described herein. In one aspect, there is provided a process for providing a process for providing a high purity acetylene comprising 100 ppm or less solvent to a point of use comprising: providing an acetylene feed stream comprising acetylene and solvent at a temperature ranging from 20° C. to ?50° C.; and introducing the acetylene feed stream to a purifier at a temperature ranging from ?50° C. to 30° C. to remove at least a portion of the solvent contained therein and provide the high purity acetylene.

Abstract: Methods and apparatus for the storage of acetylene include providing an acetylene storage device which has an interior volume. A carbonaceous adsorbent is disposed in the interior volume of the storage device, and acetylene is introduced into the storage device to be reversibly adsorbed by the carbonaceous adsorbent. A pressure of less than 2 bar is maintained in the storage device.

Abstract: The invention provides a dispenser device (10) for dispensing a liquid cosmetic, said device comprising: a first bottle (12) that is defined, in part, by a bottom wall, and that contains a first initial volume of liquid cosmetic that is under a volume of gas that presents a first initial pressure, the first bottle (12) including, in its top portion, a spray valve (18); a second bottle (14) that includes, in its top portion, a spray valve (22), and that contains a second initial volume of liquid that is under a second volume of gas that presents a second initial pressure; and first transfer means (24) for transferring the liquid from the first bottle (12) towards the second bottle (14); said device being characterized in that the first transfer means (24) comprise a first portion that is secured to the first bottle (12) and that is disposed in the proximity of the bottom wall, and a second portion that is secured to the second bottle (14), the first and second portions sealing their respective bottles (

Abstract: A system for filling pre-charged aerosol cans comprising a frame, a power actuator on the frame having an output member that extends forcibly downwardly through a stroke of fixed length and retracts upwardly, a combined reservoir and filling head supported in the frame generally below the output member, the filling head having a cylindrical dispensing bore and an outlet below the bore adapted to be coupled to the valve of the aerosol can, a dispensing piston with a lower face operable in the bore to create hydraulic pressure on liquid received in the bore from the reservoir, a set of cooperating elements for coupling a dispensing piston to the output member selectively at a plurality of predetermined fixed spacings from the output member, whereby the volume of fluid displaced from the dispensing chamber by the dispensing piston is regulated to fill cans of different capacity while the output member of the power actuator traverses its stroke of constant length.

Abstract: A filling method for filling a reservoir (10) of variable working volume with a fluid, the method being characterized in that the reservoir (10) is firstly emptied of any content, such that its working volume is substantially zero, and the fluid is then injected into the reservoir, thereby increasing the working volume of the reservoir (10).

Abstract: A pressure filling system for filling aerosol cans with liquid includes an enclosure including a top wall, a bottom wall, and side walls which form a filling chamber. An air operated pump is positioned within the filling chamber. A liquid supply tube extends into the chamber and into the pump. A pressurized air supply tube extends into the chamber and into the pump. A pressurized supply outlet tube which extends from the pump to a filling head in the filling chamber. An air purge tube is connected to the filling head to purge excess air from the liquid. A lifting mechanism lifts an aerosol can into engagement with the filling head for receiving pressurized liquid.

Abstract: A product dispenser refillable from a donor container via a spray nozzle comprising a hollow body for receiving and storing said product, a dispensing mechanism for dispensing said product, an open aperture through which product is filled into said body, capping means to cap the open aperture after filling the container to prevent leakage of product from said opening, characterized in that the dispenser comprises a filling interface arrangement integrally coupled to said open aperture that guides the spray from the spray nozzle of the donor container directly into the open aperture of the dispenser.

Abstract: A bag-on-valve aerosol valve system in a container is provided. Propellant is pressure filled around the valve stem, outwardly over the stem gasket and down into the container space outside the bag. Product is filled through the valve stem into the bag. The valve stem has an exterior intermediate frusto-conical annular surface and the valve housing has an interior frusto-conical annular surface, with both surfaces engaging in annular sealing contact to block propellant access to the bag when the valve stem is deeply depressed to a first predetermined position for propellant pressure filling. A stem exterior surface indent interacts with radially-biased spring-loaded slides to lock the stem in a second less depressed predetermined position for product filling through the stem down into the bag.

Abstract: A system and method for quickly refilling a pressurized irritant dispenser is disclosed. In the system and method, either the dispensing nozzle or the connection between the dispensing nozzle and the valve assembly is replaced with a quick connect fitting. The quick connect fitting allows for both the quick refill of irritant and the quick attachment (and detachment) of various accessories to the pressurized irritant dispenser.

Abstract: A fill valve for selective interconnection with a container is provided. The fill valve includes a head shaft and shoulder separated by grooves that are selectively positioned in an aperture of the container to selectively provide a flow path into the container.

Abstract: An improved valve assembly for use in a pressurized dispenser is disclosed. The disclosed valve assembly may include a valve housing and a blocking member operatively associated with the valve housing, wherein the wall of the valve housing includes at least one transverse primary opening and at least one transverse secondary opening thereon. The blocking member is slidable from a filling position, in which fluid communication between the interior and exterior of the valve housing is established through both primary and secondary openings, to a dispensing position, in which fluid communication between the interior and exterior of the valve housing is established only through the primary opening and not through the secondary opening. The blocking member may include a slidable sleeve, a slidable piston plate, or a combination of both. In operation, the disclosed valve member may provide an increased flow rate during product and/or propellant filling while retaining a regular flow rate during dispensing.

Abstract: Safe storage of volatile compounds or elements is provided by utilizing storage configurations that take advantage of the diffusibility and release characteristics of cell-based materials, such as foam materials. Such configurations may provide storage of hazardous, liquefied gases in closed-cell foam material. Release of gas/liquid from the foam is restricted by the need for the gas to diffuse through the closed cells. Because rapid release is prevented, storage safety is greatly improved.

Abstract: The invention relates to a method for filling a container with gas, gas being inserted into the container under compression. In order to be able to fill the container with a larger amount of gas than before and to reduce gas pressure peaks during filling, it is proposed according to the invention that electrically conducting stretched material is inserted into the container before it is filled with gas. Furthermore, the invention relates to a gas container (1), in particular a high-pressure gas cylinder, for storing gases under pressures exceeding 50 bar, in particular exceeding 200 bar, which contains electrically conducting stretched material (11). With gas containers (1) according to the invention, a higher filling level is achieved than before with a given pressure. Containers with a small wall thickness can be used without a safety risk because of a reduction of gas pressure peaks in the interior of containers.

Abstract: A device for filling an aerosol container with a liquid using in particular a filling arrangement equipped with a pusher element, includes a cup that is designed to accommodate the liquid for filling the aerosol container, this cup being provided on its bottom with an injection opening that can be adapted to the valve of the aerosol container, a piston head acting by pushing on the filling liquid contained in the cup for transferring it from the cup to the container. The piston head has the form of a scraper in continuous contact with the inside wall of the cup during the transfer operation, this piston head being shaped to work with the cup after transfer to keep the piston head within the cup to form an airtight wall that retains the residual liquid that has not been transferred within the cup.

Abstract: A refilling apparatus for a refillable container and associated methodology is described and wherein the apparatus includes a refillable dispensing container; a source of pressurized propellant for delivery to the refillable dispensing container; a valve coupled in fluid flowing relation relative to the source of pressurized propellant; a source of a liquid to be dispensed by the refillable container and which is coupled in fluid flowing relation relative to the valve, and a pressurized vessel positioned downstream relative to both the sources of the liquid to be dispensed, and the pressurized propellant, as well as the valve, and which encloses a volume of the liquid to be dispensed to refill a depleted refillable dispensing container when the refillable dispensing container engages the valve.

Abstract: Assembly (10) consisting of a dispensing valve (11) for dispensing pressurized fluids, and a pouch (12) of flexible film material in fluid-tight connection therewith, which is placeable in an outer container (15) through an opening (14) therein that is sealable by a cover (13), the dispensing valve (11) having a valve body (18) which is mountable fluid-tightly at the edge (16) of a cover opening (17) formed in the container cover (13), to which valve body (18) an outlet tube (20) extending through a pouch opening (19) is able to make fluid-tight connection. The outlet tube (20) has a disc-shaped, especially cylindrical-cap-shaped, widened portion (21) extending around the pouch opening (19) inside the pouch (12). The pouch (12) is supported against the widened portion (21) of the outlet tube (20), with the intermediate arrangement of an annular disc (22) that bounds the pouch opening (19).

Abstract: Fluid flow valve assembly comprising a valve body having an external port and an inlet end having at least a first port, a second port, and a third port; a first valve disposed within the valve body and adapted to control fluid flow between the first and second ports; and a second valve disposed within the valve body and adapted to control fluid flow between the third port and the external port.

Abstract: One embodiment relates to a system including a first bag-on-valve aerosol container including a first valve comprising a first valve stem, and a body having an aperture extending therethrough from a first end of the body to a second end of the body. The aperture is sized to accept the first valve stem at the first end of the body. The aperture is also sized to accept a second valve stem at the second end of the body; the body sized to accept the first valve stem and a second valve stem at the same time. Other embodiments are described and claimed.

Abstract: A bottle assembly is provided and includes a body portion defining a cavity therein; a top lid assembly selectively connectable to an upper end of the body portion, the top lid assembly includes a selectively deployable and retractable spout, wherein when the spout is in a deployed condition a fluid path is opened into the cavity of the body portion and when the spout is in a retracted condition the fluid path into the cavity of the body portion is closed; a trigger assembly operatively associated with the top lid assembly for selectively moving the spout between a deployed and a retracted condition; and a bottom lid assembly selectively connectable to a bottom end of the body portion, the bottom lid assembly including a valve assembly configured and adapted to open and close a fluid path into the cavity of the body portion.

Abstract: A bag-on-valve aerosol valve system in a container. Propellant is pressure filled around the valve stem, outwardly over the stem gasket and down into the container space outside the bag. Product is filled through the valve stem into the bag. The valve stem has an exterior intermediate frusto-conical annular surface and the valve housing has an interior frusto-conical annular surface, with both surfaces engaging in annular sealing contact to block propellant access to the bag when the valve stem is deeply depressed to a first predetermined position for propellant pressure filling. A stem exterior surface indent interacts with radially-biased spring-loaded slides to lock the stem in a second less depressed predetermined position for product filling through the stem down into the bag. The propellant and product may be pressure filled in either order using essentially conventional pressure filing equipment, after the valve is mounted on the container and the bag is mounted on the valve.

Abstract: A method for the production of a filled metering pump arrangement fills a product capable of flow into a film bag, which is accommodated in a container. The film bag and the container are closed by means of a pump that can be activated manually, which blocks a fluid connection between an outlet opening and the interior of the film bag, in the unstressed state, by means of at least one kick-back valve. Furthermore, the gas situated in the film bag is removed, at least approximately completely, by having at least one feed channel remain open in the container after it has been closed by the pump. By means of the at least one feed channel, a fluid that is under pressure is introduced into the container so that the film bag is compressed in the container and as a result, the gases situated in the film bag are ejected from it through the pump and/or through a bypass channel that circumvents it.

Abstract: A bottle assembly is provided having a body portion defining a cavity therein, a top lid assembly connectable to the body portion, which includes a selectively deployable and retractable spout, a spout bottom lid; and a resilient tube having a lumen therethrough, wherein the lumen is occluded when the spout is retracted and the resilient tube is kinked, and wherein the lumen is opened when the spout is deployed and the resilient tube is not kinked; a trigger assembly for selectively moving the spout between a deployed and a retracted condition; and a bottom lid assembly selectively connectable to a bottom end of the body portion, the bottom lid assembly including a valve assembly to open and close a fluid path into the cavity of the body portion.

Abstract: Method for charging an aerosol container with fluid, comprising:—providing an aerosol container (1) having a reservoir (2) comprising a product, for example a foodproduct, and having product discharge means (1a);—gradually supplying fluid to the reservoir of the container (1) via the discharge means (1a) thereof; and—applying a mixing movement to the container (1), preferably during the supplying of the fluid, to mix the fluid and product at least partly with each other, wherein the mixing movement is such that at least a first virtual point (P1, P2) of a virtual centre line (Z) of the container reservoir (2) follows an endless path around a respective virtual axis. Embodiments of the invention also provide a cleaning method and a dummy container.

Abstract: A gas supply system includes a receiver assembly, a gas storage vessel coupled to the receiver assembly, a main poppet positioned at an end of the gas storage vessel and sealing the gas storage vessel when the main poppet is closed, a pilot poppet positioned in the main poppet and sealing the gas storage vessel when the pilot poppet is closed, and a chamber positioned behind the main poppet, wherein when the pilot poppet opens, gas from the gas storage vessel is released into the chamber to exert pressure on the main poppet to open the main poppet.

Abstract: A bag-on-valve aerosol valve system in a container. Propellant is pressure filled around the valve stem, outwardly over the stem gasket and down into the container space outside the bag. Product is filled through the valve stem into the bag. The valve stem has an exterior intermediate frusto-conical annular surface and the valve housing has an interior frusto-conical annular surface, with both surfaces engaging in annular sealing contact to block propellant access to the bag when the valve stem is deeply depressed to a first predetermined position for propellant pressure filling. A stem exterior surface indent interacts with radially-biased spring-loaded slides to lock the stem in a second less depressed predetermined position for product filling through the stem down into the bag. The propellant and product may be pressure filled in either order using essentially conventional pressure filing equipment, after the valve is mounted on the container and the bag is mounted on the valve.

Abstract: An installation for filling a receptacle includes at least one frame delimiting a chamber closed at least partially by a protective door for the reception of an aerosol receptacle to be filled with liquid product, this chamber housing, elements for holding a cup adapted to receive the product to be filled at a position located above the place for reception of the aerosol receptacle in a position of contact with the valve of the aerosol receptacle, and a pusher element movable between at least two operative positions to give rise, by pressing on the liquid contained in the cup, the transfer of this liquid through an opening of the cup into the aerosol receptacle. The movement of the pusher element between its different operative positions is controlled by the movement of opening the protective door.

Abstract: The invention relates to an installation for filling an aerosol container with liquid, whereby the aerosol container is of the type that comprises at least one frame (1), means (3A, 3B) for holding—in a removable manner—a scoop (10) of liquid for filling on the frame (1) at a mount point (4) that is located above the point (5) where the aerosol container is mounted, a pushing element (6) with a removable piston head (7), and means that indicate when the piston head (7) is not attached to the pushing element (6).

Abstract: A facility for manufacturing, assembling, and filling a fluid dispenser device comprising a fluid reservoir (10) and a dispensing member (20), such as a pump or a valve, said facility being characterized in that it comprises a manufacturing unit for manufacturing a reservoir, a filling unit for filling said reservoir, and a fixing unit for fixing said dispensing member to said reservoir, said units operating continuously in a controlled atmosphere.

Abstract: A system for filling pre-charged aerosol cans comprising a frame, a power actuator on the frame having an output member that extends forcibly downwardly through a stroke of fixed length and retracts upwardly, a combined reservoir and filling head supported in the frame generally below the output member, the filling head having a cylindrical dispensing bore and an outlet below the bore adapted to be coupled to the valve of the aerosol can, a dispensing piston with a lower face operable in the bore to create hydraulic pressure on liquid received in the bore from the reservoir, a set of cooperating elements for coupling a dispensing piston to the output member selectively at a plurality of predetermined fixed spacings from the output member, whereby the volume of fluid displaced from the dispensing chamber by the dispensing piston is regulated to fill cans of different capacity while the output member of the power actuator traverses its stroke of constant length.

Abstract: Improved bag-on valve which comprises a flexible bag (4) made of impermeable material and which is provided with an opening sealed by a valve (6) which makes it possible to fill the bag (4) with a desired product, whereby the empty bag (4) is rolled up or folded round a longitudinal axis (X-X?) and is maintained in the rolled-up position, characterised in that the bag (4) is provided with means making it possible to elongate the bag (4) while it is being filled with the desired product

Abstract: A filling head gun includes a housing; a handle assembly connected to the housing; a filling head attached to the housing; a plunger extends through an opening of the housing and an activator reservoir attached to the plunger, wherein the reservoir is moved into contact with the filling head via the plunger to manually feed activator through the filling head depressing a valve of the aerosol can.

Abstract: An aerosol system or method for mixing first and second materials comprising first and second container assemblies and a coupler. The first container assembly contains the second material and a propellant material that pressurizes the second material. The second container assembly contains the first material and at least a partial vacuum. The coupler comprises first and second coupler connecting portions and is arranged such that the first coupler connecting portion engages the first container assembly and the second coupler connecting portion engages the second container assembly. The propellant material and the partial vacuum in the second container assembly cause a portion of the propellant material and at least a portion of the second material to flow into the second container assembly to form a mixture in the second container assembly. The propellant material within the second container assembly forces at least a portion of the mixture from the second container assembly.

Abstract: A fill valve for filling and sealing of a pressurized dispensing container, as well as for allowing the release of pressure from a container to prevent over pressurization. The valve may include a generally cylindrical body having a first end and a second end. The fill valve prevents over pressurization of a dispensing container by releasing pressure at a desired maximum point and then stopping the leakage of pressure at a desired minimum point.

Abstract: A process is disclosed for filling an improved aerosol dispenser with a first and a second fluid product and an aerosol propellant. The process comprises the steps of filling a first and a second inner container located within an aerosol container with the first and the second fluid products. The aerosol container is filled with the aerosol propellant. The improved aerosol dispenser separately stores the first and second fluid prior to use. The improved aerosol dispenser mixes and dispenses the first and second fluids for discharge from a terminal orifice.

Abstract: A pressurized package contaning an initial paint formulation having a neutral or clear color is prepared by mixing a propellant and a clear non-pigmented base or a clear pigmented base or a white pigmented base in a pressurizable container. This pressurized container is then sold to retail stores where tints and/or pigment dispersions are injected into the pressurized container to arrive at a matched or selected final color and sold directly to the end user.

Abstract: A pressure container filled with a propellant (22) includes an outer container (10), an inner bag (20) arrangeable in the outer container, and a cover (15) for closing the outer container (10) and provided with an inlet/outlet valve element (16), with the propellant (22) being formed in the propellant chamber (21) of the inner bag (20) by a mixture of an inert gas (23) in the propellant chamber (21) with a gaseous phase (18) of a filling material (12) in the filling material chamber (11) of the outer container (10); and the method of forming the pressure container includes inserting an inner bag (20) filled with an inert gas (23) into the outer container (10), closing the outer container (10) with a cover (15), and filling the filling material chamber (11) of the outer container (10) with a filling material (12) having a gaseous phase (18) that migrates from the filling material chamber (11) into the propellant chamber (21) of the inner bag (20), and forms therein, together with the inert gas (23), the propel

Abstract: An apparatus for charging pressurized aerosol cans with liquid is provided having a reservoir, filler coupling and safety release device. The safety release device automatically prevents over-charging the can by interacting with the safety dome to cause the can to disengage from the filling reservoir.

Abstract: The present invention is directed to an improvement for a fill valve (22) for an aerosol container (10, 30) to provide better sealing capability. The fill valve is made using a flashless injection molding process in which both the mold cavity and molding material are heated to elevated temperatures to significantly improve cross-linking which occurs during the molding process. A backside (22a) of the fill valve now has a recessed portion (56) to facilitate ejection of the valve from a mold so leak paths are not created due to the forces applied to the valve during its extraction from the mold. The recessed portion reduces the amount of material required to make the fill valve and makes the fill valve flexible to aid in providing a good seal against leakage of a propellant from the container after filling.

Abstract: A piston for a pressurized container (i.e., “aerosol can”), the piston including a body having circumferential fins, with the fins being of uniform thickness, decreasing thickness radially away from the body, or varying thickness circumferentially. Further disclosed are container precursors and containers incorporating such a piston, and methods of filling and dispensing from such containers.

Abstract: A pressurized package containing an initial paint formulation having a neutral or clear color is prepared by mixing a propellant and a clear non-pigmented base or a clear pigmented base or a white pigmented base in a pressurizable container. This pressurized container is then sold to retail stores where tints and/or pigment dispersions are injected into the pressurized container to arrive at a matched or selected final color and sold directly to the end user.

Abstract: A process of filling containers includes a passivating the filling equipment immediately prior to filling the containers with an oxidizing composition. Adjacent containers filled with different compositions are oriented relative to each other by marking the containers with a visible indicia representative of a pick up point of a dip tube within the container, rotating the containers relative to each other until the pick up point of each dip tube is positioned is a predetermined relationship to each other and thereafter adhering the containers are to each other in the predetermined relationship.

Abstract: A system and method of reducing particle generation in packaging containers used to transport ultra pure liquids. Particle generation in the containers is reduced by reducing the air-liquid interface present during filling, transport, and dispensing of the liquid.

Abstract: An apparatus and method is provided for automatically venting a fluid from at least a portion of a pressurized system. An interconnection between two devices in the system contains an automatic bleed valve configured to automatically seal a vent hole when the two devices are coupled together and to automatically unseal the vent hole before the two devices are separated. In an embodiment, an adapter includes a ring that both screws a connector onto a device and seals a vent hole. A pin is pushed into the vent hole as the connector is screwed to the device. To remove the adapter from the device, the ring is turned to both unseal the vent hole and to unscrew the connector from the device. Turning the ring releases the pin before the connector is unscrewed.

Abstract: An aerosol delivery system comprises a container defining a chamber for a product to be delivered, an outlet from the chamber through which product may in operation be delivered, a valve for controlling passage of product through the outlet and a pump for pressurising product to be delivered, wherein the pump comprises an expandable material which, in operation, may be expanded to provide the pressure for pressurising product to be delivered, the expandable material being an osmotically effective agent and/or a swellable hydrogel and being disposed on one side of a semi-permeable membrane through which, in operation, fluid may be absorbed by the expandable material to expand it and thereby generate an osmotic pressure.

Abstract: A bag-on-valve aerosol valve system in a container. Propellant is pressure filled around the valve stem, outwardly over the stem gasket and down into the container space outside the bag. Product is filled through the valve stem into the bag. The valve stem has an exterior intermediate frusto-conical annular surface and the valve housing has an interior frusto-conical annular surface, with both surfaces engaging in annular sealing contact to block propellant access to the bag when the valve stem is deeply depressed to a first predetermined position for propellant pressure filling. A stem exterior surface indent interacts with radially-biased spring-loaded slides to lock the stem in a second less depressed predetermined position for product filling through the stem down into the bag. The propellant and product may be pressure filled in either order using essentially conventional pressure filing equipment, after the valve is mounted on the container and the bag is mounted on the valve.

Abstract: A valve comprising a valve needle, a valve housing, and a valve face for introducing a medium into a container. When the valve is closed, the front face of the valve needle and the valve housing are substantially flush with an inner surface of the container. Low tolerance range fits can be provided between the container and the valve housing and/or between the valve housing and the valve needle.

Abstract: A method and apparatus for minimizing propellant emissions during the filling of an aerosol container that has a valve attached thereto and a valve stem extending from the valve. A filling head is disposed in a sealed relationship with a portion of the container so that the valve stem is encased within a recess of the filling head. A pressurized propellant is introduced into the filling head at a sufficient pressure to force the propellant through and around the valve stem and into the container. An incompressible purge medium is introduced into the filling head at a sufficient pressure to force the incompressible purge medium through and around the vale stem, wherein the incompressible purge medium flushes out residual propellant from the filling head and into the container.