Method and apparatus for reducing the pressure and temperature of steam in a steam conditioning valve
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United States of America Patent
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Jan 10, 1995
Grant Date -
N/A
app pub date -
Dec 16, 1993
filing date -
Aug 26, 1992
priority date (Note) -
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Abstract
The invention relates to a method and apparatus for reducing steam pressure and temperature in a steam conditioning valve, in which steam flow is regulated with the aid of a valve plug (5) displaceably arranged in a valve seating (4), the plug being perforated by a plurality of holes (6), while cooling water is simultaneously taken into the upper portion (8) of the valve and is regulated in proportion to the regulation of process steam, said water being taken through a hollow valve spindle (7) passing through the plug (5) for discharge through a jet (12) downstream of the center of the departing steam flow. The plug (5) has at least one row of holes (14) in its central region (13). For small opening amounts of the valve (1) process steam is taken through at least one separate duct (15) up to and past the coolant outlet from its openings (16) such as to flow past and break up the coolant, which is ejected from the duct (15) in the vicinity of, and just above the coolant outlet openings (16).
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