Steam-pressure reduction valve

Details Steam-pressure reduction valve Steam-pressure reduction valve

1984-01-20

1985-03-19

Miles, Tim

Gas and liquid contact apparatus

Fluid distribution

Valved

261 44A, 261 78A, 261 76, 261DIG13, 1376254, 137898, B01F 304

Patent

active

045058652

ABSTRACT:
A valve housing in the form of a straight- or bent-passage valve accepts in the the valve seat between its steam intake and steam outlet a choking device in the form of a perforated bushing into which a cold-water pipe with jacket-side cold-water exits projects coaxially. A control piston is mounted in such a way that it can move inside the perforated bushing and around the cold-water pipe. The control surface of the piston simultaneously releases the cold-water exits in the cold-water pipe and the reduction bores in the perforated bushing, resulting in cooling of the steam and reduction of its pressure in the high steam-pressure range in accordance with load. The cold water is accordingly injected into the hot steam as it flows in and only then does the steam, enriched with cold water, pass through the reduction bores. The steam is subsequently multiply diverted in small subsidiary streams and further reduced by a downstream diversion-and-reduction unit, resulting in optimal mixture of steam and cold water, and finally a homogeneous cooled steam.

REFERENCES:
patent: 1256853 (1918-02-01), Warner
patent: 1688285 (1928-10-01), Purvis et al.
patent: 3087675 (1963-04-01), Honegger
patent: 3732851 (1973-05-01), Self
patent: 4011287 (1977-03-01), Marley
patent: 4082251 (1978-04-01), Althausen
patent: 4442047 (1984-04-01), Johnson

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