Question: Wedge mechanical seal orientation in vacuum

[heiken01]

TL;DR Summary

Hello all,

I will use two 59U-25 ca-sic-ptfe wedge mechanical seals, in a top mounted, low speed (14rpm) mixer. Solvent heated to 100 celsius, -900mbar vacuum applied. So, steam will be in contact with the seal. I was wondering, how is the right way to install these?

Back to back or tandem?

Thanks!

 

[Lnewqban]

Welcome, @heiken01 !

What the manufacturer of the seals recommend?

 

[heiken01]

Welcome, @heiken01 !

What the manufacturer of the seals recommend?

Hi! Purchased on Alibaba. They dont know either

 

[berkeman]

Hi! Purchased on Alibaba. They dont know either

I believe Alibaba is just a reseller, like Amazon or eBay. What is the brand of the seals? Who is the manufacturer? That is who you need to ask.