JPS5469804A - Pump system with automatic flow control valve - Google Patents

Pump system with automatic flow control valve

Info

Publication number
JPS5469804A
JPS5469804A JP13669277A JP13669277A JPS5469804A JP S5469804 A JPS5469804 A JP S5469804A JP 13669277 A JP13669277 A JP 13669277A JP 13669277 A JP13669277 A JP 13669277A JP S5469804 A JPS5469804 A JP S5469804A
Authority
JP
Japan
Prior art keywords
control valve
flow control
piping
pressure
flow
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
JP13669277A
Other languages
Japanese (ja)
Inventor
Minoru Chiba
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13669277A priority Critical patent/JPS5469804A/en
Publication of JPS5469804A publication Critical patent/JPS5469804A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To control the discharge flow rate of a centrifugal pump within the rated level by providing a flow control valve in the discharge piping of the pump for automatic control of the discharge pressure.
CONSTITUTION: The pressure in a piping 6 is lead to a cylinder 14 via a pilot piping 28 and is exerted on a pressure receiving surface A1 of a piston 20 while the pressure of a piping 7 is exerted on a pressure receiving surface A2 of a piston 19 whereby the resultant force of the forces acting on the pistons 19 and 20 pushes up a valve stem 17 resisting against a spring 21 to open a flow passage of a flow control valve 3. When K is the spring constant of the spring 21 and δ is the deflection: Kδ={A1(H1+H2)+A2H2}/ρ. When H=H1+H2: Kδ=(A1H+A2H2)/ρ whereby the flow passage area of the flow control valve 3 increases or decreases corresponding to the value of (A1H+A2H2). Since A1<A2, the flow passage area of the flow control valve decreases when H2 is lower than predetermined level and balances at the point where the total head H1+H2 is larger than the rated head.
COPYRIGHT: (C)1979,JPO&Japio
JP13669277A 1977-11-16 1977-11-16 Pump system with automatic flow control valve Pending JPS5469804A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13669277A JPS5469804A (en) 1977-11-16 1977-11-16 Pump system with automatic flow control valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13669277A JPS5469804A (en) 1977-11-16 1977-11-16 Pump system with automatic flow control valve

Publications (1)

Publication Number Publication Date
JPS5469804A true JPS5469804A (en) 1979-06-05

Family

ID=15181228

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13669277A Pending JPS5469804A (en) 1977-11-16 1977-11-16 Pump system with automatic flow control valve

Country Status (1)

Country Link
JP (1) JPS5469804A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000001734A (en) * 1998-06-13 2000-01-15 장일웅 Hydraulic pressure pump and apparatus for maintaining constant velocity
WO2001007790A1 (en) * 1999-07-22 2001-02-01 Framatome Anp Gmbh Method and device for regulating the pressure in a supply line, extending from a centrifugal pump
KR100477053B1 (en) * 2002-07-18 2005-03-18 데르-판 셴 Flow regulator for water pump
KR101251387B1 (en) * 2012-01-09 2013-04-09 정기영 Pump control unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000001734A (en) * 1998-06-13 2000-01-15 장일웅 Hydraulic pressure pump and apparatus for maintaining constant velocity
WO2001007790A1 (en) * 1999-07-22 2001-02-01 Framatome Anp Gmbh Method and device for regulating the pressure in a supply line, extending from a centrifugal pump
KR100477053B1 (en) * 2002-07-18 2005-03-18 데르-판 셴 Flow regulator for water pump
KR101251387B1 (en) * 2012-01-09 2013-04-09 정기영 Pump control unit

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