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Title:
VALVE DEVICE
Document Type and Number:
Japanese Patent JP2018080766
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To reduce leakage of vapor caused by attachment of a foreign substance to a valve element or a valve seat.SOLUTION: A drain trap 100 comprises: a casing 1 in which a passage 18 through which drain flows is formed; and a valve 3 provided in the passage 18 to switch between opening and closing of the passage 18. The valve 3 includes: a first valve seat 41; a first valve element 31 to be separated from and seated on the first valve seat 41; a second valve seat 42 provided upstream of the first valve seat 41 in a flow direction of the passage 18; and a second valve element 32 to be separated from and seated on the second valve seat 42.SELECTED DRAWING: Figure 1

Inventors:
FUJITA SATOYUKI
Application Number:
JP2016223827A
Publication Date:
May 24, 2018
Filing Date:
November 17, 2016
Export Citation:
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Assignee:
TLV CO LTD
International Classes:
F16K1/44; F16K51/00; F16T1/10
Domestic Patent References:
JP2005048923A2005-02-24
JP2002517696A2002-06-18
Attorney, Agent or Firm:
Kenzo Terazono
Daisuke Kawabe



 
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