vs6 pump in an intermittent propylene service

[danyel231]

in case of an intermittent service with few start a year, what plan of mechanical seal should we use?
contamination of propylene is not allowed and pressure margin above vapor pressure at pumping temp. is very low

 

[Artisi]

you would be better posting this question in pump engineering forum and ask management to remove it from this forum.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)