mafsu,

If I understood your post correctly, the answer would be yes to a certain degree. Whether you use a screw type injector or plunger type you will at the point the break is filled encounter an mechanical / hydraulic lock. At this point there is no more room for expansion and continued force will cause the weakest link to give. You will notice an increase in tension and force required to work the injector. Pressure relief is usually noticed in a breakdown of the injector to glass seal in the form of seeping or worst case scenario would be progression of damage. This is something you will notice by feel but there are also visual indicators. Oh and yes there a certain amount of force exerted on the glass just from user interaction during pressure and vacuum cycling.

If my response was out of the ball park in respect to what you were thinking, just disregard.

Pay it foward,

Brian
www.safeglasstechnologies.com

info@safeglasstechnologies.com</p>