JPH0457681U - - Google Patents

Info

Publication number
JPH0457681U
JPH0457681U JP9998290U JP9998290U JPH0457681U JP H0457681 U JPH0457681 U JP H0457681U JP 9998290 U JP9998290 U JP 9998290U JP 9998290 U JP9998290 U JP 9998290U JP H0457681 U JPH0457681 U JP H0457681U
Authority
JP
Japan
Prior art keywords
valve
sub
main
back pressure
opening
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
JP9998290U
Other languages
English (en)
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 filed Critical
Priority to JP9998290U priority Critical patent/JPH0457681U/ja
Publication of JPH0457681U publication Critical patent/JPH0457681U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Description

【図面の簡単な説明】
第1図は本考案の一実施例を示す真空排気装置
の系統図、第2図は従来の一例を示す真空排気装
置の系統図である。 1……開閉弁、2……油蒸気貯入容器、3,3
a……油回転ポンプ、4……圧力検知器、5……
制御装置、6……主開閉弁、7……真空容器、8
……油拡散ポンプ。

Claims (1)

    【実用新案登録請求の範囲】
  1. 真空容器と接続される主開閉弁と、この主開閉
    弁に排気管を介して接続される油拡散ポンプと、
    この油拡散ポンプの背圧を減圧する機械式ポンプ
    と、背圧を検知する圧力検知器とを備える真空排
    気装置において、前記排気管と接続される副開閉
    弁と、この副開閉弁と接続される油蒸気貯入容器
    と、この油蒸気貯入容器を真空排気する機械式ポ
    ンプとを備え、前記油拡散ポンプの背圧が所定の
    圧力に到達したら、前記主開閉弁を閉じ、前記副
    開閉弁を開くことを特徴とする真空排気装置。
JP9998290U 1990-09-25 1990-09-25 Pending JPH0457681U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9998290U JPH0457681U (ja) 1990-09-25 1990-09-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9998290U JPH0457681U (ja) 1990-09-25 1990-09-25

Publications (1)

Publication Number Publication Date
JPH0457681U true JPH0457681U (ja) 1992-05-18

Family

ID=31842291

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9998290U Pending JPH0457681U (ja) 1990-09-25 1990-09-25

Country Status (1)

Country Link
JP (1) JPH0457681U (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001295761A (ja) * 2000-04-11 2001-10-26 Ebara Corp 真空排気システム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001295761A (ja) * 2000-04-11 2001-10-26 Ebara Corp 真空排気システム

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