JPS5593994A - Pump - Google Patents

Pump

Info

Publication number
JPS5593994A
JPS5593994A JP131379A JP131379A JPS5593994A JP S5593994 A JPS5593994 A JP S5593994A JP 131379 A JP131379 A JP 131379A JP 131379 A JP131379 A JP 131379A JP S5593994 A JPS5593994 A JP S5593994A
Authority
JP
Japan
Prior art keywords
pressure
accumulator
regulating valve
chamber
upstream
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.)
Granted
Application number
JP131379A
Other languages
Japanese (ja)
Other versions
JPS6228320B2 (en
Inventor
Shunichi Nishimura
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 JP131379A priority Critical patent/JPS5593994A/en
Publication of JPS5593994A publication Critical patent/JPS5593994A/en
Publication of JPS6228320B2 publication Critical patent/JPS6228320B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE: To maintain the fluid pressure of an accumulator within a fixed range by sealing a gas pressurized above the atmospheric pressure in one of the chambers of an accumulator and introducing the liquid in the upstream of a pressure regulating valve for maintaining constant output pressure of the pump to the other chamber of the accumulator.
CONSTITUTION: When the pressure in a centrifugal pump 8 is lowered below a set pressure as a faucet 16 is opened, a pressure regulating valve 20 closes and a pressure switch 18 is closed to raise the pressure. When the pressure in the centrifugal pump 8 is raised above a set pressure, pressure regulating valve 12 opens and the pressure switch 18 is opened, while the pressure in a liquid chamber 28 is maintained above the pressure of the gas sealed in a pressure chamber 26 as the liquid chamber 28 of the accumulator 20 is connected to the upstream of the pressure regulating valve 12. Accordingly, a diaphragm 24 in the pressure accumulator 20 is maintained at a position between positions (B) and (C), thus reducing the amplitude of the diaphragm relative to the conventional device so that the life time of the disphragm 24 is remarkably extended.
COPYRIGHT: (C)1980,JPO&Japio
JP131379A 1979-01-12 1979-01-12 Pump Granted JPS5593994A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP131379A JPS5593994A (en) 1979-01-12 1979-01-12 Pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP131379A JPS5593994A (en) 1979-01-12 1979-01-12 Pump

Publications (2)

Publication Number Publication Date
JPS5593994A true JPS5593994A (en) 1980-07-16
JPS6228320B2 JPS6228320B2 (en) 1987-06-19

Family

ID=11498003

Family Applications (1)

Application Number Title Priority Date Filing Date
JP131379A Granted JPS5593994A (en) 1979-01-12 1979-01-12 Pump

Country Status (1)

Country Link
JP (1) JPS5593994A (en)

Also Published As

Publication number Publication date
JPS6228320B2 (en) 1987-06-19

Similar Documents

Publication Publication Date Title
ES440636A1 (en) Fluid operated valve
JPS5593994A (en) Pump
GB1531768A (en) Diving equipment
ES473584A1 (en) Unloading
GB1428425A (en) Valves
JPS5646180A (en) Pilot valve
JPS54138461A (en) Pressure transmitter
JPS52138704A (en) Fluid pump
JPS579365A (en) Plate type regulating valve
JPS554629A (en) Pressure regulator valve
JPS5314277A (en) Fluid apparatus
JPS5594001A (en) Pressure accumulator
JPS521701A (en) Pressure difference pump
JPS57161375A (en) Valve cap
JPS51149416A (en) Control device for secondary air s upply
JPS54142616A (en) Pressure container
JPS57190165A (en) Mechanical seal
JPS5537529A (en) Blow-by gas reduction means
EP0105790A3 (en) Constant pressure relief valve for an air control valve
JPS5620807A (en) Amount of flow and pressure control system
JPS5474060A (en) Shaft sealing device
JPS57137782A (en) Vacuum breaker
JPS5587885A (en) Liquid sealed type vacuum pump
JPS5238617A (en) Control device of water sealing vacuum pump
JPS55114687A (en) Pressure reducing device for marine pressure reducing chamber