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    • 7. 发明专利
    • Improvements in Return Steam Traps.
    • GB190305026A
    • 1904-01-28
    • GB190305026D
    • 1903-03-04
    • LEES WALTERLEES THOMAS WILLIAMLEES ARCHIBALD
    • LEES WALTERLEES THOMAS WILLIAMLEES ARCHIBALD
    • 5026. Lees, W., Lees, T. W., and Lees, A. March 4. Direct steampressure apparatus. -Relates to steam traps in which the condensed water is returned to t h e boiler by the steam pressure, and more particularly to the construction and mode of actuation of the steam admission and relief valves. A spindle c is rotatably mounted in a casing over the body of the steam trap, and is actuated by a float. Valve discs d are carried on the ends of a double arm set on the spindle ; another valve disc g is similarly mounted on a lever h. These discs control the steam-admission ports a' and the relief port e', respectively. When the condensation water in the trap is below a certain level, the float holds the steam ports a closed, and the relief port, which is in connection with a check valve serving to prevent condensed water from re-entering the casing, is held open, so that the pressure is relieved by the escape of steam. When the water rises high enough, the valves are reversed, and steam from the boiler enters the trap through the opening b and the ports a , and drives the condensed water back to the boiler. The movement of the valves is limited by stops.