Abstract: A fluid release system is disclosed comprising an apparatus that utilises fluid under pressure in operation. The system also includes a control means adapted to control the supply of fluid under pressure to the apparatus and a fluid containment reservoir adapted to contain fluid utilised by the apparatus in operation. A fluid release outlet is provided in the fluid containment reservoir, the fluid release outlet being adapted to allow fluid to be released from the fluid containment reservoir. A valve operatively associated with the fluid release outlet, is provided which is adapted to be opened to allow flow of the fluid from the fluid containment reservoir to the fluid release outlet. A pressure operated valve closure means to close the valve in use is also provided. In use, the pressure operated valve closure means is adapted to be connected to a source of the fluid under pressure in operation of the apparatus to thereby close the valve. A valve for use in the fluid release system is also disclosed.

Abstract: An air flow control valve including: a valve body having an internal cavity and an inlet and outlet in flow communication with the internal cavity, the axes of the inlet and outlet being aligned at substantially 90° each other; a valve seat located within the cavity and co-axially aligned with the outlet, the valve sat being located on the distal end of an upstanding tubular pedestal which is famed around the outlet; the internal cavity being configured so as to define an annular space around the pedestal with which the inlet is in flow communication; a flexible generally planar diaphragm mounted above the valve seat, the diaphragm supporting a valve closure member which is adapted to engage the valve seat to close the valve; valve control means for causing the diaphragm to move towards and away from the valve seat to dose and open the valve respectively; and the valve being characterised in that, with the valve oriented with die inlet axis horizontal and the outlet facing downwards, the valve seat is located