Abstract: The invention relates to a shut-off valve for controlling flow of a pressurised gas. The shut-off valve comprises a body defining a passage extending between a gas inlet channel and a gas outlet channel, and a sealing element arranged to, in a first position, close the passage, and in a second position, open the passage to allow gas to flow between the gas inlet channel and the gas outlet channel through the passage. The invention also relates to a method for controlling flow of a pressurised gas by means of a shut-off valve.

Abstract: The invention relates to a protective valve ring (1) for an oxygen gas cylinder (3). The protective valve ring (1) comprises a body (4) adapted to enclose an outlet (5) of a cylinder valve (2). The body (2) comprises an incombustible and heat absorbing material, and has an internal shaping adapted to guide any potential oxygen gas leak away from inflammable parts of the gas cylinder (3). The invention also relates to a shut-off valve (2) for controlling flow of a pressurised gas and a method for attaching a protective valve ring (1) to a shut-off valve (2) of an oxygen gas cylinder (3).

Abstract: The invention relates to shut-off valve for controlling flow of a pressurised gas. The shut-off valve comprising a body defining a passage extending between a gas inlet channel and a gas outlet channel, a sealing element, and an emergency stop mechanism. The sealing element arranged to, in a first position, close the passage, and in a second position, open the passage to allow gas to flow between the gas inlet channel and the gas outlet channel through the passage. The invention also relates to a method for controlling flow of a pressurised gas with a shut-off valve and a method for activating an emergency stop of a shut-off valve.

Abstract: A cutting torch comprises a cutting oxygen channel for supplying cutting oxygen, a heating oxygen channel for supplying heating oxygen, a fuel gas channel for supplying fuel gas, an ignition mixer configured to generate ignition gas from heating oxygen and fuel gas, a heating oxygen bypass channel originating from the heating oxygen channel and coupled to the ignition mixer, the heating oxygen bypass channel configured to supply heating oxygen to the ignition mixer, a fuel gas bypass channel originating from the fuel gas channel and coupled to the ignition mixer, the fuel gas bypass channel configured to supply fuel gas to the ignition mixer, and a fuel gas shut-off valve located on the fuel gas bypass channel. The shut-off valve is configured to turn off the supply of the fuel gas to the ignition mixer, and the ignition mixer supplies only heating oxygen to the cutting oxygen channel.

Abstract: The present invention relates to a cutting torch system having an ignition mode and a cooling and cleaning mode. The cutting torch system comprises a cutting torch (1) having a cutting oxygen channel (4), a heating oxygen channel (5), and a fuel gas channel (6) The heating oxygen channel (5) and the fuel gas channel (6) are connected to an ignition mixer (7) and a fuel gas shut-off valve (8) is arranged upstream of the ignition mixer (7). The fuel gas shut-off valve (8) is configured to be open in the ignition mode and closed in the cleaning and cooling mode. The ignition mixer (7) is adapted for mixing heating oxygen and fuel gas into an ignition gas and communicating the ignition gas into the cutting oxygen channel (4) in the ignition mode, and for communicating heating oxygen into the cutting oxygen channel (4) in the cleaning and cooling mode.

Abstract: A shut-off valve for controlling flow of a pressurized gas including a restrictor, which at its second axial end extends in a radial direction of a passage to essentially cover a mouth of the passage. Further the restrictor includes a longitudinally extending guiding member for guiding a gas flow between a gas inlet and a gas outlet when a sealing member is in a second position. The guiding member is arranged to allow gas to leave the passage in a radial direction of the restrictor.

Abstract: A pressure regulator includes a body having a gas inlet for a gas having an inlet pressure and a gas outlet for the gas having an outlet pressure lower than the inlet pressure and a passage connecting the outlet to the inlet. A regulator piston is arranged to control the outlet pressure of the gas by moving closer to and further away from a pressure regulator seat, and a regulating elastic element is arranged to bias the regulating piston in a direction away from the pressure regulator seat, against the force of gas at outlet pressure acting on the regulator piston in a direction towards the pressure regulator seat. The passage is fluidly connected to a floating piston, arranged to move in response to increased inlet pressure by compressing a stabilizing elastic element. The stabilizing elastic element is connected to the regulating elastic element via a connection element.

Abstract: A shut-off valve for controlling flow of a pressurized gas including a restrictor, which at its second axial end extends in a radial direction of a passage to essentially cover a mouth of the passage. Further the restrictor includes a longitudinally extending guiding member for guiding a gas flow between a gas inlet and a gas outlet when a sealing member is in a second position. The guiding member is arranged to allow gas to leave the passage in a radial direction of the restrictor.

Abstract: A pressure regulator includes a body having a gas inlet for a gas having an inlet pressure and a gas outlet for the gas having an outlet pressure lower than the inlet pressure and a passage connecting the outlet to the inlet. A regulator piston is arranged to control the outlet pressure of the gas by moving closer to and further away from a pressure regulator seat, and a regulating elastic element is arranged to bias the regulating piston in a direction away from the pressure regulator seat, against the force of gas at outlet pressure acting on the regulator piston in a direction towards the pressure regulator seat. The passage is fluidly connected to a floating piston, arranged to move in response to increased inlet pressure by compressing a stabilizing elastic element. The stabilizing elastic element is connected to the regulating elastic element via a connection element.