supported by a removable support means the actuation means in this case would be removing the burst disk support so that the fluid pressure is able to burst the disk and flow through to the second chamber fig6 depicts the invention inflation system 40 for inflation of an inflatable member comprising a gas source 42 and any aspect of the valve 1 as described above in a further aspect of the invention the gas source 42 is a stored pressurized gas source alternatively the gas source 42 is a pyrotechnic gas generator source in a preferred embodiment of the invention the gas source 42 is an inflator device adapted for producing a sufficient quantity of a gaseous product to substantially inflate an inflatable member operatively associated therewith comprising a first stage gas source 60 a second stage gas source product to substantially inflate an inflatable member operatively associated therewith comprising a first stage gas source 60 a second stage gas source 62 of liquefied gas in fluid communication at a first location 64 with the first stage gas source 60 and at a second location 66 with the valve 1 wherein the first stage gas source 60 is capable of providing a sufficient quantity of gas at a sufficiently high temperature to vaporize substantially all of the liquefied gas in the second stage gas source 62 in a further preferred embodiment the inflation system 40 further comprises an aspirator which receives the fluid from the valve outlet port 15 and also pulls in ambient air and allows the combination to flow through to the inflatable.