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Experts / Senior Engineers - I am interviewing with a mechanical seal manufacturer next friday. I have been extensively reading all the material I can get from the internet about mechanical seals. I am preparing a list of technical questions 1) What is a pusher / non pusher seal? 2) What...

How do you determine the seal chamber pressure? Is this specified by the pump manufacturer? Does it have to be measured or any equations? Why is the seal chamber pressure an important parameter for mechanical seal selection?

What is the advantages of using a seal type "B" vs a "C" type. In seal "C" the bellows is not rotating.

for the mixture i need Density Cp thermal conductivity dynamic viscosity

If I have a vapor liquid glycol mixture that has a vapor fraction of more than 50%. Are there any equations I can use to estimated the average property of this mixture. Any help would greatful.

Friends, How do you determine or select the rotational speed of the desiccant wheel in a dehumidifier? I need to design the belt pulley and require the power. The power is related to the rotational speed. Thanks, Lisa