Abstract: The invention relates to an electronic gauge (I) for use with a compressed gas cylinder (2). The electronic gauge (I) comprises a display interface (4), a pressure sensor (5) having a pressure sensing element (6) and an amplification circuit (7) for amplifying a signal from the pressure sensing element (6), a temperature sensor (8), and a control electronics board (I 0) connected to the display interface (4), the pressure sensing element (6) and the temperature sensor (8). The invention also relates to a method of calculating time remaining until substantially all gas in a compressed gas cylinder (2) has been depleted, and a method of monitoring that a residual pressure valve of a gas cylinder (2) is operational.

Abstract: Valve assembly (10) comprises two valve portions, an upper and lower valve portion (12,24), each having a valve housing indicated generally at (16,18) which are generally annular and a valve closure member (20,20?) which is pivotally mounted within the housing. The valve closure member (20,20?) is in the form of an annular disc and is provided with spindles (22,22?) by means of which the valve closure member is pivotally mounted within the housing. The valve closure member (20,20?) and the spindles (22,22?) are machined from a single piece of metal.

Abstract: Valve assembly (10) comprises two valve portions, an upper and lower valve portion (12,24), each having a valve housing indicated generally at (16,18) which are generally annular and a valve closure member (20,20?) which is pivotally mounted within the housing. The valve closure member (20,20?) is in the form of an annular disc and is provided with spindles (22,22?) by means of which the valve closure member is pivotally mounted within the housing. The valve closure member (20,20?) and the spindles (22,22?) are machined from a single piece of metal.