 | |  | |  | |  | |  | |  |
CENTRIFUGAL-PUMP.ORG
Sealless pumps
Sealless pumps belong to a special class of pumps that do not require a sealing
element (mechanical seal) to prevent the pumped liquid from leaking into the
atmosphere because its internal rotor, assembled with the impeller, do not extend
outside of the pressure containment casing. The casing-shaft joint, which can be
a potential source of leakage, is effectively eliminated.
Sealless pumps can be grouped into two types:
Sealless pumps, in spite of their special feature of being leak-proof, have certain
design constraints that severely limit their application, among which are:
R0509-SEPU
Filename: sealless pumps
"Make it simple"
Sealless pumps belong to a special class of pumps that do not require a sealing
element (mechanical seal) to prevent the pumped liquid from leaking into the
atmosphere because its internal rotor, assembled with the impeller, do not extend
outside of the pressure containment casing. The casing-shaft joint, which can be
a potential source of leakage, is effectively eliminated.
Sealless pumps can be grouped into two types:
- magnetic pumps - the internal rotor contains a permanent magnet
assembly
- Canned motor pumps - the internal rotor contains a laminated iron
induction motor core
Sealless pumps, in spite of their special feature of being leak-proof, have certain
design constraints that severely limit their application, among which are:
- the material selection, and material thickness, of the pressure
containment casing is limited making them unsuitable for high pressure
application.
- the methods of hydraulically balancing the pump is limited, making them
unsuitable for high thrust load service.
- Sealless pumps are generally more expensive than comparative ANSI or
ISO pumps.
R0509-SEPU
Filename: sealless pumps
"Make it simple"
| TECHNICAL Concepts Parts Auxiliaries Glossary Engineering data Library Bulletin board Go to our Sitemap for list of articles By accessing this site you agree to our Terms of Use and Legal Disclaimer Copyright notice Privacy policy |
Custom Search