GB1234587A - - Google Patents

Info

Publication number
GB1234587A
GB1234587A GB1234587DA GB1234587A GB 1234587 A GB1234587 A GB 1234587A GB 1234587D A GB1234587D A GB 1234587DA GB 1234587 A GB1234587 A GB 1234587A
Authority
GB
United Kingdom
Prior art keywords
stage
valve
pressure
passage
outlet
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.)
Expired
Application number
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
Publication of GB1234587A publication Critical patent/GB1234587A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/10—Multi-stage pumps with means for changing the flow-path through the stages, e.g. series-parallel, e.g. side loads
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C25/00—Portable extinguishers with power-driven pumps
    • A62C25/005—Accessories

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

1,234,587. Centrifugal pumps. GODIVA FIRE PUMPS Ltd. Aug. 22, 1969 [Sept. 27, 1968], No.46088/68. Heading F1C. A centrifugal pump for fire-fighting purposes comprises a stage 1 for low-pressure, high volume delivery and a circumferential-flow stage 2 for high-pressure, low volume delivery. The impellers are adjacently mounted on a common shaft with the impeller 3 on one end thereof. When valve 8 is open as shown, some of the discharge from stage 1 is by-passed to stage 2 which discharges through outlet 12 and passage 16. When the valve 8 is closed a diaphragmactuated valve 17 opens to unload stage 2 by allowing the passage of liquid therefrom to the inlet 5 of stage 1. A pressure-actuated by-pass relief valve may communicate with outlet 12.
GB1234587D 1968-09-27 1968-09-27 Expired GB1234587A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4608868 1968-09-27

Publications (1)

Publication Number Publication Date
GB1234587A true GB1234587A (en) 1971-06-03

Family

ID=10439808

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1234587D Expired GB1234587A (en) 1968-09-27 1968-09-27

Country Status (2)

Country Link
DE (1) DE1945016A1 (en)
GB (1) GB1234587A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135022A (en) * 1983-02-14 1984-08-22 Stephen Walker Tebby Improvements in or relating to impeller pumps particularly for fire fighting
GB2338747A (en) * 1998-06-26 1999-12-29 Godiva Limited Two stage pump with low and high pressure output, a thermal relief valve and a filter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2950941B1 (en) * 2009-10-05 2011-12-09 Arbatax DOUBLE ELECTRIC PUMP FOR THE MAINTENANCE OF SWIMMING POOLS

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2135022A (en) * 1983-02-14 1984-08-22 Stephen Walker Tebby Improvements in or relating to impeller pumps particularly for fire fighting
GB2338747A (en) * 1998-06-26 1999-12-29 Godiva Limited Two stage pump with low and high pressure output, a thermal relief valve and a filter
GB2338747B (en) * 1998-06-26 2002-04-10 Godiva Ltd Pumps

Also Published As

Publication number Publication date
DE1945016A1 (en) 1970-04-02

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years