Air Venturi 74 CU FT Air Tank issue

BobsterIT said:

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

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@BobsterIT
Make sure that your pressure relief valve is tightened shut. It’s the small, knurled metal circle shaped knob. You may need to grip it tight and twist a little harder with your fingers. Mine leaked once or twice and I thought I’d have to change it. It mysterious remedied itself. I called Air Venturi and they told me about the internal plastic seal within the valve. I think you may need to replace the plastic piece within the valve of it continues to leak. If your burst disc is the issue, it will continue to leak if it’s blown. If the relief valve is not the issue, try putting a little soapy water around the burst disc to see if it bubbles. If it does, find a small socket to snug it down a bit and see if that helps.

BobsterIT said:

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

Click to expand...

I have a brand new tank from Pyramid Air and was on the phone for three or four hours with Air Venturi about the same problem. The tank filled OK with a dead head on the whip, but once the tank was up to 300 bar pressure, that relief valve began to give me trouble. I hand tightened the valve as hard as I could by hand but in running a deadhead test, the bleed valve blew at about 200 bar. I could not get the valve tight enough to get past 200 bar without the bleed valve venting. I immediately ordered a replacement valve from Amazon and am going to have the stock valve set removed. Problem is that the ability to 'crack' the main valve results in pressure almost instantly builds up when you do your best to keep it a slow release. The main valve is terrible and I am not able to actually ever able to get the two-finger release that the manual specifies. The valve needs a full hand to open and that is too fast a release for a slow release and the bleed valve. The main filling valve is hard to 'crack' at a slow rate with a dead head installed on the whip. It may be better when going into an airgun but I simply do not trust the bleed valve to last very long when you need a tool to close it. 200 bar seems to be a tripping point for that bleed valve. I just don't trust the setup that comes with the Wingman. It is a pretty cheap valve to keep the cost down. Some folks may learn to live with it but the experience I've had so far gave me an excuse to put a better valve on the tank. Best of luck with your tank. You may have the right touch to find the right fill rate with the stock setup but I could not achieve a fill with a finger and a thumb, as the manual instructs. I needed a valve with a smooth release for a slow fill rate and found it too difficult to consistently get that slow release. It actually gave me the incentive to go for a valve with two manometers; one for the air pressure in the tank at all times, and one for the fill rate pressure in the whip showing the actual fill rate into my airguns. Others may have a lighter touch than I do but my replacement valve set has a very smooth opening and release of air. You might be able to work the value with an empty tank until it is smoother with time. I see this was posted last October, so I hope you have had luck with your stock valve set.