Today I received my new Air Venturi 74 CU FT Air Tank I started filling it with a compressor. when is got to about 298 bar it vented a little bit of air as if I had blown a burst disk. What was wierd is after it vented, it went back to filling with no leaks..I know when a burst disk blows thats it it need to be replaced but are thses tanks designed to vent somehow when the pressure get to high? Kinda shocked me so I stopped filling it. It reads on the compressor 268 bar but on the tank it reads 300bar. This is a 4500 psi tank so it should go up to around 310 bar