Main steam valve for a steam turbine

Details Main steam valve for a steam turbine Main steam valve for a steam turbine

2008-06-10

2008-06-10

Fox, John (Department: 3753)

Fluid handling

Systems

Multi-way valve unit

C137S630140

Reexamination Certificate

active

07383859

ABSTRACT:
A main steam valve with improved flow characteristic and enhanced reliability comprises a valve seat, a main valve body, and a bypass valve body. A side surface of the bypass valve body slidably fits into the inner surface of the main valve body and forms a steam inlet comprised of a plurality of rows of inlet openings arranged along the side surface. The openings are diametrically symmetrically arranged in the bypass valve, and the positions of the openings in each of the rows are shifted from the positions of openings in the next row.

REFERENCES:
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patent: 4066100 (1978-01-01), Schwarz
patent: 4315526 (1982-02-01), Ohtomo
patent: 5014746 (1991-05-01), Heymann
patent: 5870896 (1999-02-01), Clark et al.
patent: 6926032 (2005-08-01), Nawaz
patent: 55-064405 (1980-05-01), None
patent: 57-151006 (1982-09-01), None
patent: 61-057442 (1986-12-01), None
patent: 03-003045 (1991-01-01), None

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