Water getting in the tank is a valid concern. But...ever have your din valve/tank refilled after diving. Did the fill station slap the whip on and fill without blowing the valve threads dry. Water is in the tank. You often start the fill process with water in the valve threads.
Overfilling is a valid concern. They refered to a chilled bath. Where do you get one of those? Ours is room temperature. The bath helps keep the tank closer to room temperature, not below. Even very slow fills generate enough heat for the presure to drop enough to piss off customers unless you overfill to compensate. For my own fills I never woried about being 300 pounds under full, but everyone else sure pitches a *****. Before installing our bank system we filled streight from the compressor which only pumps about 4 cfm. This is a slow fill (20 minutes for an empty al 80. If filled to 3000 the tank would be warm to the touch and still cool to 2700 or so. A HP 100 would get hot and drop significantly in presure.
A room temp. water bath and a reasonable fill rate does a great job of letting you get a full tank WITHOUT having to overfill.
Overfilling is a valid concern. They refered to a chilled bath. Where do you get one of those? Ours is room temperature. The bath helps keep the tank closer to room temperature, not below. Even very slow fills generate enough heat for the presure to drop enough to piss off customers unless you overfill to compensate. For my own fills I never woried about being 300 pounds under full, but everyone else sure pitches a *****. Before installing our bank system we filled streight from the compressor which only pumps about 4 cfm. This is a slow fill (20 minutes for an empty al 80. If filled to 3000 the tank would be warm to the touch and still cool to 2700 or so. A HP 100 would get hot and drop significantly in presure.
A room temp. water bath and a reasonable fill rate does a great job of letting you get a full tank WITHOUT having to overfill.
