EP 0222233 B1 19910102 - MULTISTAGE CENTRIFUGAL PUMP FOR THE TRANSPORT OF LIQUID GAS
Title (en)
MULTISTAGE CENTRIFUGAL PUMP FOR THE TRANSPORT OF LIQUID GAS
Publication
Application
Priority
DE 3539251 A 19851106
Abstract (en)
[origin: US4753571A] A liquefied gas pump wherein a vessel contains a supply of liquefied gas which is pumped from its inlet to its outlet by a multi-stage upright centrifugal pump whose first stage is immersed in the supply of liquefied gas in the vessel. The shaft seal at the upper end of the pump housing is held out of contact with liquefied gas by a first flow restrictor above the last stage of the pump, an expansion chamber which is filled with liquefied gas and is located above the first flow restrictor, a gas collecting chamber between the expansion chamber and the seal, and a second flow restrictor which is disposed between the two chambers and prevents penetration of liquefied gas from the expansion chamber into the collecting chamber. The latter is connected with the vessel and/or with a gas collecting tank. The expansion chamber is connected with the second and/or third stage of the pump in order to ensure that it is filled with liquefied gas.
IPC 1-7
IPC 8 full level
F04D 13/08 (2006.01); F04D 29/10 (2006.01)
CPC (source: EP US)
F04D 13/083 (2013.01 - EP US); F04D 29/10 (2013.01 - EP US)
Designated contracting state (EPC)
AT FR GB IT
DOCDB simple family (publication)
EP 0222233 A2 19870520; EP 0222233 A3 19880824; EP 0222233 B1 19910102; AT E59694 T1 19910115; DE 3539251 A1 19870514; DE 3539251 C2 19871203; US 4753571 A 19880628
DOCDB simple family (application)
EP 86114824 A 19861024; AT 86114824 T 19861024; DE 3539251 A 19851106; US 92252986 A 19861024