Title:
制御弁トリム
Document Type and Number:
Japanese Patent JP4644674
Kind Code:
B2
Abstract:
A fluid control valve trim and seat with a valve plug of a radius of about 0.03 inch, when used in conjunction with a valve seat angle of about 75°, results in minimal unbalance area. The valve trim is provided with pairs of anti-cavitation notches. The notches are arranged such that notches of each given pair are angled with respect to one another, and may be further arranged such that adjacent pairs of notches are off-set relative to one another, so as to increase the time fluid spends in the plenum, resulting in proper staging and controlled pressure drop as fluid passes through the valve.
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Inventors:
Hamblin, Nathan Jay.
Long, Ted A.
Long, Ted A.
Application Number:
JP2006532308A
Publication Date:
March 02, 2011
Filing Date:
March 02, 2004
Export Citation:
Assignee:
Fisher Controls International Limited Liability Company
International Classes:
F16K1/52; F16K1/34; F16K47/04
Domestic Patent References:
| JP48020049B1 | ||||
| JP55024253A | ||||
| JP53116828U | ||||
| JP41000758Y1 |
Foreign References:
| US3252480 | ||||
| US6003551 |
Attorney, Agent or Firm:
Yoshihiro Tsunoda