Abstract: A process for the simultaneous utilization of low expanded foam and medium expanded foam produced by respective generators thereof, for the extinction of fires, from liquefied gas comprising transporting the medium expanded foam by the faster traveling low expanded foam in order to provide a high velocity of flow of the medium expanded foam. The low expanded foam is produced by a plurality of generators disposed beneath a single generator of medium expanded foam and inclined with respect thereto to direct the jets of low expanded foam into the lower part of the jet of medium expanded foam.

Abstract: Method and apparatus for pressurizing a reservoir comprising directly introducing gas into the reservoir from a first supply source in an amount to instantly pressurize the reservoir and balancing the pressure between a second supply source for service gas and the reservoir via a regulating valve mechanism which controls admission of gas under pressure from the second source into the reservoir when a differential exists between the second pressure source and the pressure prevailing in the reservoir due to its connection with the first pressure source.