Patent ID: 7638063

Claim:
A method for recharging an aeration tank with an amount of compressed, oxidizing gas, comprising: placing, during a first period of time, at least a controllable first valve that has a first position and a second position into the first position to supply compressed oxidizing gas through a first flow passage to a valve housing, the valve housing having an interior chamber separated into an upstream portion and a downstream portion, the upstream portion of the interior chamber connected to the first valve by the first flow passage and connected through a second valve to the aeration tank by a second flow passage when the second valve is in a first position; supplying the compressed oxidizing gas to the aeration tank through the first and second flow passages and the upstream portion while the controllable first valve is in its first position and the second valve is in its first position; placing, during a second period of time following the first period of time, at least the controllable first valve into its second position where the first flow passage is connected to an atmospheric vent, so that the compressed oxidizing gas is not supplied to the valve housing; venting gas within the upstream portion of the interior chamber through the first flow passage and the atmospheric vent; and checking the compressed oxidizing gas from flowing from the aeration tank through at least the first flow passage when the compressed oxidizing gas is not supplied to the valve housing, independently of the position of the second valve, such that a supply of the compressed oxidizing gas is contained within the aeration tank as the amount of compressed oxidizing gas.