NL7605410A - Twin pumps with changeover flap valves - have devices restricting amount for which valves can open - Google Patents

Twin pumps with changeover flap valves - have devices restricting amount for which valves can open

Info

Publication number
NL7605410A
NL7605410A NL7605410A NL7605410A NL7605410A NL 7605410 A NL7605410 A NL 7605410A NL 7605410 A NL7605410 A NL 7605410A NL 7605410 A NL7605410 A NL 7605410A NL 7605410 A NL7605410 A NL 7605410A
Authority
NL
Netherlands
Prior art keywords
valves
open
outside
housing
twin pumps
Prior art date
Application number
NL7605410A
Other languages
Dutch (nl)
Original Assignee
Loewe Pumpenfabrik Gmbh
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 Loewe Pumpenfabrik Gmbh filed Critical Loewe Pumpenfabrik Gmbh
Priority to NL7605410A priority Critical patent/NL7605410A/en
Publication of NL7605410A publication Critical patent/NL7605410A/en

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
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type
    • 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
    • F04D15/0022—Control, e.g. regulation, of pumps, pumping installations or systems by using valves throttling valves or valves varying the pump inlet opening or the outlet opening

Abstract

The twin pumps are particularly for use in a central heating system, having changeover and non-return flap valves on the pressure side. These valves (13) work in conjunction with devices (16) restricting the degree for which they can open. The latter can be stops on the hinge pin for the valves, and so arranged that they can be actuated from outside the pump housing, typically by levers fixed to the hinge pin. The levers can work against scales on the outside of the housing. Alternatively, eccentric or taper pins, extending through the housing and actuated from outside, can be used to restrict valve movement.
NL7605410A 1976-05-20 1976-05-20 Twin pumps with changeover flap valves - have devices restricting amount for which valves can open NL7605410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7605410A NL7605410A (en) 1976-05-20 1976-05-20 Twin pumps with changeover flap valves - have devices restricting amount for which valves can open

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7605410A NL7605410A (en) 1976-05-20 1976-05-20 Twin pumps with changeover flap valves - have devices restricting amount for which valves can open

Publications (1)

Publication Number Publication Date
NL7605410A true NL7605410A (en) 1977-11-22

Family

ID=19826233

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7605410A NL7605410A (en) 1976-05-20 1976-05-20 Twin pumps with changeover flap valves - have devices restricting amount for which valves can open

Country Status (1)

Country Link
NL (1) NL7605410A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738584A (en) * 1986-07-28 1988-04-19 Carl Price Multiple impeller pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738584A (en) * 1986-07-28 1988-04-19 Carl Price Multiple impeller pump

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Legal Events

Date Code Title Description
BV The patent application has lapsed