3” TC Sight Glass Vacuum Rating

[tripeland]

Does anyone know if a 3” TC sight glass can handle full vacuum pressure?

 

[Vale71]

If it can handle at least 1 bar of positive pressure it will definitely be able to hold full vacuum. The cylindrical shape and the rigidity of the glass should make it irrelevant whether it's positive or negative pressure.

 

[Jeremy W]

If it can handle at least 1 bar of positive pressure it will definitely be able to hold full vacuum. The cylindrical shape and the rigidity of the glass should make it irrelevant whether it's positive or negative pressure.

I was actually trying to find online the pressure ratings of TC Sight Glasses, is 1bar the general consensus?

 

[kiwipen]

I have no idea, but I don't think all TC sight glasses of the same size are rated for the same pressure.