EP 0702155 A3 19970108 - Pump for hot and corrosive fluids
Title (en)
Pump for hot and corrosive fluids
Title (de)
Pumpe zur Förderung heisser, korrosiver Medien
Title (fr)
Pompe pour fluides chauds et corrosifs
Publication
Application
Priority
DE 4432551 A 19940913
Abstract (en)
[origin: CA2157843A1] The pump comprises a drive part 2 and a pump body 1, the drive shaft 4 being sealed off from the corrosive medium by a shaft seal. The shaft seal consists of a stator ring which is fitted into the pump body 1 and/or into the drive part 2 and through which the drive shaft 4 is passed while leaving a seal gap 5. One or more dry-running bearings 11 for the drive shaft 4 is/are arranged in the drive part 2. The drive part 2 also comprises a gas channel 18, which communicates in terms of flow with the seal gap 5, with a supply connection 19 and a discharge connection 20. While the pump is operating a hot gas is admitted to the gas flow channel 18 via the supply connection 19 and leaves the drive part again through the discharge connection 20. The supply pressure is set such that the static pressure of the gas in the gas flow channel 18 above the stator ring 3 is higher than the pressure of the delivery medium which partially or completely fills the pump body.
IPC 1-7
IPC 8 full level
F04B 15/04 (2006.01); F04C 2/12 (2006.01); F04C 15/00 (2006.01); H02K 49/02 (2006.01)
CPC (source: EP US)
F04C 15/0069 (2013.01 - EP US); F04C 15/0096 (2013.01 - EP US)
Citation (search report)
- [Y] EP 0590777 A1 19940406 - TUTHILL CORP [US]
- [Y] US 4958988 A 19900925 - REGEV MORDECHAI [IL]
- [DA] DE 4212982 A1 19931021 - LEDERLE PUMPEN & MASCHF [DE]
- [A] EP 0499504 A1 19920819 - BERTIN & CIE [FR]
- [A] US 5263825 A 19931123 - DOOLIN JOHN H [US]
- [A] DE 9307447 U1 19930722
- [A] DE 8909636 U1 19901206
- [A] DE 3536092 A1 19870416 - NGK INSULATORS LTD [JP]
- [A] US 4792244 A 19881220 - YAMASHITA YUKO [JP], et al
- [A] DE 1286825 B 19690109 - CARBORUNDUM CO
- [A] DE 3922279 A1 19900111 - TOSHIBA KAWASAKI KK [JP]
Designated contracting state (EPC)
BE CH ES FR GB IT LI NL
DOCDB simple family (publication)
DE 4432551 A1 19960314; CA 2157843 A1 19960314; EP 0702155 A2 19960320; EP 0702155 A3 19970108; EP 0702155 B1 20011107; ES 2167390 T3 20020516; JP H0893639 A 19960409; US 5569024 A 19961029
DOCDB simple family (application)
DE 4432551 A 19940913; CA 2157843 A 19950908; EP 95113673 A 19950831; ES 95113673 T 19950831; JP 25448795 A 19950907; US 52388695 A 19950906