Pneumatic release system

A pneumatic release system comprising:

• an inlet arranged to be connected, in use, to a supply of pressurised fluid;
• an outlet arranged, to be connected, in use, to an end device, the system defining therethrough, a flow path for fluid from the inlet to the outlet;
• a piston mounted in and axially moveable relative to a cylinder, the inlet and outlet defined in the cylinder, the piston having a piston body, a piston end, a piston seal provided around the piston body and upper and lower seals mounted at axially spaced locations to the piston end, wherein the upper seal and the lower seal have substantially same diameter, and wherein the piston seal has a smaller diameter than the upper and lower seals;
• wherein the piston is biased to a first closed position, in which the upper and lower seals define a chamber within the cylinder to retain pressurised fluid from the inlet, the chamber having a flat top part;
• the upper seal preventing flow of the fluid from the chamber to the outlet by contacting the flat top part of the chamber, and
• wherein an external force applied to the piston moves the piston to an open position with the upper seal away from sealing engagement with the flat top part of the cylinder to allow fluid to flow from the chamber to the outlet.