Air assisted seal pressure vessel

[Rymack]

We are working on hydro testing the inner bowl of a jacketed pressure vessel with agitator (mixer). The lid has an air assisted seal that pressurizes and slightly lifts the lid and locks into place. My question is if we are hydro testing to 9 bar should we match the air pressure of the seal to 9 bar with a regulator? My concern is we believe the seal is passing slightly and air is entering the tank. If thats the case will there be a risk of overpressurizing? or will the air pressure match the water pressure (or whichever is greater will overcome each other)

Any questions/input is appreciated

thanks

 

[LittleInch]

You're going to have to describe what htis seal looks like as its not clear to me.

Also what is the pressure rating of the seal?

 

[Doug Hunter]

There ought to be a design specification available for the seal pressurization relative to the vessel pressure. Can you confirm one way or the other?

 

[btrueblood]

A sketch of the seal geometry might help.

That said, the seal (presumably made from an elastomer?) will likely deform from the applied hydro test pressure and the internal air will equalize to be substantially the same as the hydro pressure.