JPS55142945A - Double butterfly type gate valve - Google Patents

Double butterfly type gate valve

Info

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
Application number
JP4995479A
Other languages
Japanese (ja)
Inventor
Fukashi Sugasawa
Haruhiko Iizuka
Yukihiro Eto
Toshiaki Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP4995479A priority Critical patent/JPS55142945A/en
Publication of JPS55142945A publication Critical patent/JPS55142945A/en
Pending legal-status Critical Current

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
JP4995479A 1979-04-23 1979-04-23 Double butterfly type gate valve Pending JPS55142945A (en)

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)

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