Title:
流量制御弁
Document Type and Number:
Japanese Patent JP7453134
Kind Code:
B2
Abstract:
To provide a flow rate control valve capable of suppressing the generation of wear even when a needle valve body partially contacts with an annular valve seat.SOLUTION: In a needle valve controlling a flow rate of chemicals, a rod 60 is inserted while keeping a clearance, and a guide portion 121 is provided, which guides the movement of the rod 60. The rod 60 is equipped with an O-ring 77 on an outer peripheral surface of a part inserted in the guide portion 121, and slidably held with respect to the guide portion 121. The rod 60 is equipped with flexibility capable of inclining to a center axis CL2 of an annular valve seat 24, with the O-ring 77 as a fulcrum. An opening is adjusted to be minute so as to control a control fluid to a predetermined minute flow rate. When a needle valve body 41 partially contacts with the annular valve sear 24, the rod 60 inclines by the flexibility, so that contacting pressure loaded on the needle valve body 41 by partial contacting is eased.SELECTED DRAWING: Figure 2
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Inventors:
Yuki Asano
Nishida Shigenobu
Hiroyuki Murase
Nishida Shigenobu
Hiroyuki Murase
Application Number:
JP2020208420A
Publication Date:
March 19, 2024
Filing Date:
December 16, 2020
Export Citation:
Assignee:
CKD Corporation
International Classes:
F16K1/32; F16K1/38; F16K31/04; F16K41/04
Domestic Patent References:
| JP5150009B2 | ||||
| JP2019173877A | ||||
| JP2018071670A | ||||
| JP201675300A |
Attorney, Agent or Firm:
Patent Attorney Corporation Cosmos International Patent and Trademark Office
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