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Pump Suction Press Vs. Vap. Press.
In the data sheets of some new pumps I noticed that the pump Suction Press. is equal to or a bit less than the pumped liquid Vapour Press. at the pumping temp. Wouldn't that cause a cavitaion problem? In addition, the data sheets shows that there is NPSHa (few meters). But how come we have...- me3
- Thread
- Replies: 5
- Forum: Pump engineering
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Single Vs. Double Mechanical Seals
When selecting a new pump for a process plant how to decide if you need a single or a double mechanical seal? Is this seal selection based on the pumping conditions (disch. press, vap. press, ..etc), or is there a definite rules for such selection? I searched in the API682 and API610, but...- me3
- Thread
- Replies: 4
- Forum: Pump engineering
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Mechanical Seal Barrier Fluid
We used to use Propanol as a barrier fluid for our Ethylene Transfer Pump which uses a double, back to back mechanical seal arrangement, and which pumps Ethylene at -104Deg C (-155F). But we can not use this Propanol any more as it will contaminate the process in case of seal failure. Is...- me3
- Thread
- Replies: 15
- Forum: Pump engineering
