JPS55142945A - Double butterfly type gate valve - Google Patents
Double butterfly type gate valveInfo
- Publication number
- JPS55142945A JPS55142945A JP4995479A JP4995479A JPS55142945A JP S55142945 A JPS55142945 A JP S55142945A JP 4995479 A JP4995479 A JP 4995479A JP 4995479 A JP4995479 A JP 4995479A JP S55142945 A JPS55142945 A JP S55142945A
- Authority
- JP
- Japan
- Prior art keywords
- peripheral surface
- external
- gate valve
- facing
- projection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Lift Valve (AREA)
Abstract
PURPOSE: To obtain a gate valve easy to close even when it is stained with soot, etc. by making an external diameter of a projection smaller than that of another, of two annular projections interposed facing each other on both sides of an annular channel provided on an external periphery of a disc plate of a circular plate form.
CONSTITUTION: A gate valve 6 has a valve plate 6a of a circular plate form and an annular channel 6b is arranged along the center portion of its external peripheral surface. Annular projections 6c, 6d which form both sides of a channel 6b and are disposed facing each other on the both sides of the channel 6b, are so made as projection 6d facing down stream has somewhat smaller diameter for an external circumference than a projection 6c facing upstream by a required amount. With this constitution, even when an external peripheral surface 6d is stained with soot, etc., since there is some margin between an external peripheral surface 6d and an internal peripheral surface of the passage 5, a degree for opening is not expanded for closing a valve until the height of the soot exceeds the extent of the margin, the sealing characteristic is maintained.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4995479A JPS55142945A (en) | 1979-04-23 | 1979-04-23 | Double butterfly type gate valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4995479A JPS55142945A (en) | 1979-04-23 | 1979-04-23 | Double butterfly type gate valve |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55142945A true JPS55142945A (en) | 1980-11-07 |
Family
ID=12845425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4995479A Pending JPS55142945A (en) | 1979-04-23 | 1979-04-23 | Double butterfly type gate valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55142945A (en) |
-
1979
- 1979-04-23 JP JP4995479A patent/JPS55142945A/en active Pending
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