# US 2019/0316708 A1 · Control butterfly valve

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- Number: US 2019/0316708 A1
- Document ID: US20190316708A1
- Status: Published application
- Kind: A1
- Application number: 16/377,596
- Filed: 2019-04-08
- Published: 2019-10-17
- Earliest claimed: 2018-04-12
- Assignees: P&K ENG Co., Ltd.
- Applicants: P&K ENG Co., Ltd.
- Inventors: Yong Taek PARK; Myoung Joon KWON
- Web page: https://patentgrep.com/patent/US20190316708A1

## CPC

- F16K 47/045: {and the closure member being rotatable}
- F16K 47/08: for decreasing pressure {or noise level} and having a throttling member separate from the closure member {, e.g. screens, slots, labyrinths}
- F16K 1/22: with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K 1/222: {Shaping of the valve member}
- F16K: VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING {(devices for emptying and evacuating the excess liquid in valves or conduits F16L55/07)}

## Abstract

A control butterfly valve comprises a valve body having a fluid passage through which a fluid flows, a valve disc controlling an opening and closing of the fluid passage of the valve body, and a diffuser including a passing hole configured to allow the fluid, which passes through the valve disc, to pass therethrough and a passing part configured to allow the fluid, which passes through the valve disc at a low speed, to pass therethrough.

## Claims

### Claim 1

A control butterfly valve, comprising:
a valve body having a fluid passage through which a fluid flows;
a valve disc controlling an opening and closing of the fluid passage of the valve body; and
a diffuser including a passing hole configured to allow the fluid, which passes through the valve disc, to pass therethrough and a passing part configured to allow the fluid, which passes through the valve disc at a low speed, to pass therethrough, wherein the passing part is formed in a lower part of the diffuser to face a lower part of the valve disc, and wherein the passing part has a plurality of holes through which the fluid passes.

### Claim 2 (depends on 1)

The control butterfly valve of claim 1, wherein eddy producing parts are formed in an upper part and a lower part of the valve disc to create an eddy of the fluid.

### Claim 3 (depends on 2)

The control butterfly valve of claim 2, further comprising a sheet formed on an inner circumferential surface of the valve body to seal off the valve disc, wherein a cutoff part is inclinendly formed in a predetermined length in an upper part of the valve disc which faces a ceiling surface of the sheet.