Mechanical seal maintenance

[vjr0512]

We are using VS1 type pump (fitted with single Mechanical seal catridge type )for pumping the Treated effluent to the sea. The kw rating is 430. The client specification calls for Spacer type coupling for all the pumps and somehow this got missed out during the procurement and the pump presently without spacer coupling and got delivered.

Now Client had raised the concern as they have lost the flexibility of replacing the mechanical seal insitu and for every replacement of Mech seal there requires motor lifting with lifting cranes etc.

As for as i understand , the spacer type coupling will be useful for BB type pumps to replace the bearings or the mechanical seal insitu. Also spacer type coupling would greatly help for the OH2 pumps removal that are basically back pull out type without disturbing the drive motor. Is this same practical to VS1 type pumps too for replacing the Mechanical seal insitu?

Thanks for your answers.

 

[Artisi]

If there was a spacer coupling fitted as specified by the client, could the mechanical seal be replaced without removal of the drive unit. If yes, then the client has every right to raise the question and reject the equipment supply.

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.)

 

[LittleInch]

In essence yes it is the same for a VS1, but every vendor is slightly different.

You need to see if the coupling and shaft provided allows for seal replacement with the motor installed.

If not then you need to see if a relatively simply retrofit to add a spacer coupling and an additional spacer for the motor mounting is possible.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[tuneball]

You could also explore a split seal.....PPC 1200S.

 

[lukin1977]

see page 6

Link