Title:
MANUALLY-OPERATED DIAPHRAGM VALVE
Document Type and Number:
WIPO Patent Application WO/2021/161946
Kind Code:
A1
Abstract:
Provided is a manually-operated diaphragm valve that can set the open/close range of a valve body while maintaining compactness with a simple structure, that can ensure a sufficient flow rate during a fully-opened period without being affected by individual differences of the internal shape of the valve, and that can optionally adjust the flow rate during the fully-opened period. A valve body 1 is provided with a valving element 12 that is mounted inside of a body 10, and a spindle 13 that is screw-fastened to the body 10 in a vertically movable manner so as to cause the valving element 12 to come close to or separate from a valve seat 14. To the upper portion of the valve body 1, a handle 2 is attached so as to manually rotate the spindle 13. In the vicinity of a portion above the valve body 1, a fully-opened position adjustment mechanism 20 is provided which regulates rotational movement of the handle 2 on the valve-opening operation side during the fully-opened period and which sets the upper limit of the flow rate during the fully-opened period of the valving element 12.
Inventors:
IIZUKA HISANOBU (JP)
Application Number:
PCT/JP2021/004499
Publication Date:
August 19, 2021
Filing Date:
February 08, 2021
Export Citation:
Assignee:
KITZ SCT CORP (JP)
International Classes:
F16K7/16; F16K31/60; F16K35/00
Foreign References:
| JPH0379875A | 1991-04-04 | |||
| CN208565776U | 2019-03-01 | |||
| JPH0559072U | 1993-08-03 | |||
| JP2000291824A | 2000-10-20 | |||
| US4953586A | 1990-09-04 |
Attorney, Agent or Firm:
KOBAYASHI, Tetsuo (JP)
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