Abstract: A system of production and distribution of condensable vapor in a close circuit, at approximately constant pressure and temperature serving two systems of stations utilizing vapor at respectively high pressure and low pressure, comprising a transfer lock arrangement, for transferring condensates from a low-pressure condensate reserve to a high-pressure condensate reserve, wherein the low-pressure condensate return line and the drain conduit connecting the two condensate reserves are respectively provided with two motor-actuated stop valves and whose servo-motors are respectively connected to the monitoring member of the level controller of the low-pressure condensate reserve.

Abstract: In a system of production, distribution and utilization of condensable vapor with recovery of the condensates in a closed container, a method for forced delivery of condensates consisting in awaiting the obtention of a predetermined level of filling of the container, in isolating from the outside the upper space of the container and in applying at the free surface of the contained liquid a sufficient additional vapor pressure to allow the total available gas pressure to be substantially equivalent to the sum of the necessary net geometrical height of delivery and the down-stream flow pressure losses to be overcome.

Abstract: A closed-loop, steam generating and distributing system with uniform fluid temperature and pressure everywhere and devoid of any steam-trap or like phase separator, comprising a boiler, a receiver collecting condensates through gravity feed, a pump drawing condensates from said receiver and forcing them back into said boiler, a water make-up tank connected through a feed pipe-line and a feed pump to the bottom of said receiver, and a condensate bleed duct leading from the discharge side of the condensate pump to the top of said receiver through a restriction.