Abstract: Gas regulating means (22), to regulate the flow of gas so as to achieve a desired pressure set by a user, is provided. The gas regulating means (22) is located within a gas flow path between a gas inlet and a gas outlet, characterised in that the gas regulating means (22) comprises an encapsulated valve (24; 410) with a lever (26; 426) that can be actuated by a proximate movable piston arrangement (20). In an embodiment, the encapsulated valve (24, 410) of the gas regulating means (22) comprises a valve body (50; 412) having an inlet side (52; 416) and an outlet side (54; 420), the lever (26; 426) being pivotally fitted at the outlet side (54; 420) with a pivot pin (56; 430), the lever (26; 426) having an actuating cam (66; 432), proximate the pivot pin (56; 430). The encapsulated valve (24, 410) of the gas regulating means (22) comprises a capsule valve pin (68; 434) for abutting against the actuating cam (66; 432) of the lever (26; 426).

Abstract: A gas pressure regulator (10) is disclosed, comprising a body (12) fitted with a gas inlet stem (14), at a first end of the body (10), for receiving gas from a gas source at a first pressure, and a gas outlet stem or adaptor (16) at a second end of the body (10), for supplying gas at a desired pressure at the gas outlet stem (16). A pressure adjusting mechanism (18) is provided to enable a user to adjust and set the desired pressure, the pressure adjusting mechanism (18) comprising a movable piston arrangement (20). The gas pressure regulator (10) further comprises gas regulating means (22), to regulate gas flowing out of the gas outlet stem (16) to achieve the desired pressure set by the user.

Abstract: A gas pressure regulator (10) is disclosed, comprising a body (12) fitted with a gas inlet stem (14), at a first end of the body (10), for receiving gas from a gas source at a first pressure, and a gas outlet stem or adaptor (16) at a second end of the body (10), for supplying gas at a desired pressure at the gas outlet stem (16). A pressure adjusting mechanism (18) is provided to enable a user to adjust and set the desired pressure, the pressure adjusting mechanism (18) comprising a movable piston arrangement (20). The gas pressure regulator (10) further comprises gas regulating means (22), to regulate gas flowing out of the gas outlet stem (16) to achieve the desired pressure set by the user.

Abstract: The invention relates to a multifunctional valve unit (10) for use on a gas cylinder to which it is attached for the controlled filling of the cylinder and for the controlled discharge of gas therefrom. The unit has a unitary or monolithic valve body (32) providing a filling port (12) and a cylinder connector (14) in gas flow communication with the filling port (12), for releasable attachment of the unit to a gas cylinder. The unit further comprises a manually operable manual shut-off valve (16), a gas pressure regulator (18), a minimum retention valve (20), a pressure gauge (22), a flow control device (24), and a pressure relief safety valve (26), all of which are mounted on the valve body. The flow control device is, as a whole, replaceably removable from the remainder of the multifunctional valve unit while the cylinder connector is connected to a gas cylinder containing gas and the manual shut-off valve is closed.

Abstract: A pressure vessel for transportation of liquefiable petroleum gas (LPG) is cylindrical with a circular cross-sectional profile. The wall thickness of the vessel (in meters) multiplied by a design strength of the material from which the vessel is made (in megapascals) is less than 0.8 times the internal diameter of the vessel (in meters). The design strength is the yield strength divided by 1.5 or the tensile strength divided by 2.5. The wall thickness is between 3 mm and 11 mm. The diameter is between 1 and 2.6 m. The vessel have have an external insulating and fire resistant cladding. It may also have a cooling plant for cooling the LPG.

Abstract: A process for the treatment of a liquid reactive medium with a gas comprising dispersing the gas in a liquid in which the gas is sparingly soluble to form a dispersion thereof, said liquid being maintained at a pressure (P1) greater than the pressure (P2) of the liquid reactive medium and the amount of said gas dispersed therein being in excess of its saturation point in the liquid; and introducing the dispersion into the liquid reactive medium having a demand for the gas which is in excess of the amount of gas capable of being dissolved therein at the prevailing conditions in the treatment zone.

Abstract: Method and apparatus for treating edible plants with feed water containing carbon dioxide and ozone while maintaining a growth maintaining effective amount of oxygen therein.

Abstract: The invention relates to the extraction of metal values from metal bearing ores. More specifically, the invention comprises, in a process 10 for extracting metal values from metal bearing ores, a method of enhancing metal value recovery from the ore. The method comprises introducing, upstream of a metal recovery section 26, a gaseous agent by means of arrangements 30. The gaseous agent is capable of promoting recovery of metal values from the ore. The gaseous agent introduction is into at least one of the pipelines 20, 24, 28 conveying ore slurry or process water for use in slurry ore or for slurry make-up.

Abstract: This invention relates to the extraction of metal values from metal bearing ores. More particularly, in a process for recovering metal values from metal bearing ore, the invention provides the step of enhancing metal value recovery by introducing into the thickener overflow water 32, a gaseous agent capable of promoting recovery of the metal values from the ore. The gaseous agent may be oxygen or oxygen enriched gas, and can be injected by means of injection means 50.

Abstract: This invention relates to the extraction of metal values from metal bearing ores. More specifically, according to the invention, in a process for extracting metal values from metal bearing ores, there is provided a method of enhancing metal value recovery from the ore. The method comprises introducing, upstream of a metal recovery section 26, a gaseous or liquid agent capable of promoting recovery of the metal values from the ore, into the gland service water from at least one of the pumps 30. The introduction of the gaseous or liquid agent is by means of an arrangement 35. The agent may be oxygen.

Abstract: A method and apparatus in which a container is provided with a refrigeration facility. A holder for holding carbon dioxide snow is placed within the interior of the container so that the carbon dioxide snow is in gaseous communication with the interior of the container. The holder or a continuous wall region of the holder, constituting about 15% of the total wall area of the holder, is fabricated of a flexible material that is at least substantially impermeable to the carbon dioxide snow and permeable to gaseous carbon dioxide. Additionally, a combination container and holder is disclosed along with a combination holder and support structure. The support structure is attachable to the container to support the holder so that the carbon dioxide snow is in gaseous communication with the interior of the container.