Argon Inflation Systems - Accessories This is our Argon Systems and accessories area. This is where you will find mounts, relief valves and regulators. Don’t forget the overpressure relief; Overpressure relief valves are necessary on argon systems. The reason behind this is simple if you have a first stage freeze or if it has high pressure creep there is no second stage to free flow and let the pressure past. The pressure will continue to build in the hose until the hose explodes. All that is needed to fix this is a small fitting in a first stage low pressure port called an overpressure relief valve.