GB893102A - System for controlling the flow of byepass liquid from a centrifugal pump - Google Patents

System for controlling the flow of byepass liquid from a centrifugal pump

Info

Publication number
GB893102A
GB893102A GB4097658A GB4097658A GB893102A GB 893102 A GB893102 A GB 893102A GB 4097658 A GB4097658 A GB 4097658A GB 4097658 A GB4097658 A GB 4097658A GB 893102 A GB893102 A GB 893102A
Authority
GB
United Kingdom
Prior art keywords
valve
pipe
liquid
relay
pass
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
GB4097658A
Inventor
Thomas James Mcalpine
John Donaldson
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.)
Weir Group PLC
Original Assignee
G&J Weir 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 G&J Weir Ltd filed Critical G&J Weir Ltd
Priority to GB4097658A priority Critical patent/GB893102A/en
Publication of GB893102A publication Critical patent/GB893102A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
    • F04D15/0011—Control, e.g. regulation, of pumps, pumping installations or systems by using valves by-pass valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
    • F22D5/18—Controlling water feed or water level; Automatic water feeding or water-level regulators for varying the speed or delivery pressure of feed pumps

Abstract

893,102. Centrifugal pumps. WEIR Ltd., G. & J. Feb. 11, 1960 [Dec. 19, 1958], No. 40976/58. Class 110 (1). [Also in Group XXIX] A centrifugal pump, fed by a booster pump, discharges liquid through a pipe 29 and through a non-return valve 13 to the point of use, such as a boiler. A pilot valve 5, controlling the flow of liquid from the pipe 29 to a relay 3, is positioned by the non-return valve 13, through a bell-crank lever 24 such that for small flows through the non-return valve, pilot valve 5 is held open. The relay valve 3 is spring-loaded such that this valve will not open until the pressure in the line 29 reaches a predetermined value at which value the relay valve opens and allows flow through a pipe 32 to act on a piston 33 of a by-pass valve 6 to open this valve and by-pass liquid from the pipe 29 through a pipe 38. Thus for small flows through the pipe 29, the by-pass valve cannot open until a predetermined pressure has been reached in the pipe. When the pilot valve 5 closes, liquid trapped between this valve and piston 33 leaks past the piston allowing the bypass valve and relay valve to close. In a modification, the opening of the relay valve allows leakage from the upper face of a by-pass valve, which allows the pressure in the line 38 to open this-by-pass valve. Specification 562,833 is referred to.
GB4097658A 1958-12-19 1958-12-19 System for controlling the flow of byepass liquid from a centrifugal pump Expired GB893102A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4097658A GB893102A (en) 1958-12-19 1958-12-19 System for controlling the flow of byepass liquid from a centrifugal pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4097658A GB893102A (en) 1958-12-19 1958-12-19 System for controlling the flow of byepass liquid from a centrifugal pump

Publications (1)

Publication Number Publication Date
GB893102A true GB893102A (en) 1962-04-04

Family

ID=10417525

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4097658A Expired GB893102A (en) 1958-12-19 1958-12-19 System for controlling the flow of byepass liquid from a centrifugal pump

Country Status (1)

Country Link
GB (1) GB893102A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517687A (en) * 1967-06-01 1970-06-30 Schroeder & Co H Method and device for the oscillation-free operation of a rotary pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3517687A (en) * 1967-06-01 1970-06-30 Schroeder & Co H Method and device for the oscillation-free operation of a rotary pump

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