We use mineral oil (Chevron Superla White Oil) in a seal and are having failures that are being attributed to too high a viscosity.
The seal manufacturer has recommended a "lower" viscosity. I would like to get away from using phrases that the viscosity is "too high" and don't go "too low" and get some numbers or rules of thumb.
This pump is outside and we seem to have more failures in cold weather. The pump does not run continuous and we think that cold seal fluid and its viscosity may be part of the problem. A lower viscosity seal fluid will be much simpler and less expensive than heat tracing the seal pot, etc.
I have heard that 0.4 cP is a lower limit but did some looking at the John Crane and Flowserve websites and did not see anything. Any other websites with information would be most appreciated.
The seal manufacturer has recommended a "lower" viscosity. I would like to get away from using phrases that the viscosity is "too high" and don't go "too low" and get some numbers or rules of thumb.
This pump is outside and we seem to have more failures in cold weather. The pump does not run continuous and we think that cold seal fluid and its viscosity may be part of the problem. A lower viscosity seal fluid will be much simpler and less expensive than heat tracing the seal pot, etc.
I have heard that 0.4 cP is a lower limit but did some looking at the John Crane and Flowserve websites and did not see anything. Any other websites with information would be most appreciated.