JPS56113085A - Operation method for pump - Google Patents

Operation method for pump

Info

Publication number
JPS56113085A
JPS56113085A JP1360080A JP1360080A JPS56113085A JP S56113085 A JPS56113085 A JP S56113085A JP 1360080 A JP1360080 A JP 1360080A JP 1360080 A JP1360080 A JP 1360080A JP S56113085 A JPS56113085 A JP S56113085A
Authority
JP
Japan
Prior art keywords
valve
opening
flow
pump
intermediate 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
JP1360080A
Other languages
Japanese (ja)
Inventor
Katsuji Nakamura
Toshio Miwa
Masakatsu Ooya
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.)
Ebara Corp
Original Assignee
Ebara Corp
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 Ebara Corp filed Critical Ebara Corp
Priority to JP1360080A priority Critical patent/JPS56113085A/en
Publication of JPS56113085A publication Critical patent/JPS56113085A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

PURPOSE: To improve the efficiency when changing the number of operating pump, by squeezing a valve to predetermined intermediate opening in specific range of flow while in other range opening the valve entirely or bringing to the opening larger than said intermediate opening and squeezing the valve only in the required flow range.
CONSTITUTION: The characteristic curve at the delivery of a discharge valve will vary as shown by the dashed line. In other wird it will shift from 1 to 1' for 100% r.p.m. of single pump, from 2 to 2' for minimum r.p.m. of single pump, from 3 to 3' for 100% r.p.m. of two pumps and from 4 to 4' for minimum r.p.m. of two pumps. The normal operational range will also shift from 6 to 6'. When assuming the number of pump changing flow is q1, the flows for controlling the valve to intermediate opening are q2, q3 and when bringing the valve to intermediate opening between them while entirely opening for the flow higher than q3, it can be operated efficiently. When the minimum required flow is Q1, it can be operated efficiently even in the region between Q1Wq2 by opening the valve from the intermediate opening even for the flow lower than q2.
COPYRIGHT: (C)1981,JPO&Japio
JP1360080A 1980-02-08 1980-02-08 Operation method for pump Pending JPS56113085A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1360080A JPS56113085A (en) 1980-02-08 1980-02-08 Operation method for pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1360080A JPS56113085A (en) 1980-02-08 1980-02-08 Operation method for pump

Publications (1)

Publication Number Publication Date
JPS56113085A true JPS56113085A (en) 1981-09-05

Family

ID=11837697

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1360080A Pending JPS56113085A (en) 1980-02-08 1980-02-08 Operation method for pump

Country Status (1)

Country Link
JP (1) JPS56113085A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0359162A (en) * 1989-07-25 1991-03-14 Hisaka Works Ltd Device and method for controlling flow in package dyeing or the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0359162A (en) * 1989-07-25 1991-03-14 Hisaka Works Ltd Device and method for controlling flow in package dyeing or the like

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