I recently removed the valve from my Great White (97 cf) tank to check for moisture after topping it off for about a year with the Yong Heng using one cotton filter and a Diablo Dry Air filter. NO moisture in the tank, for those that might be interested.
Filled the tank from empty today (about 75 degrees in the shop) using only the Yong Heng with my standard setup- a tool box (holds roughly 2 gallons) filled with ice/water that is regularly replenished and an external ducted fan blowing laterally on the cylinders.
Zero-1000 took 10 minutes, temp at 41C.
1000-2000 took 11 minutes, temp at 41C.
2000-2500 took 6 minutes, temp held at 42C.
2500-3000 took 6 minutes, temp stayed at 42C.
3000-3500 took about 6.5 minutes, temp still 43C.
3500-4000 took 7 minutes, temp 43C.
4000-4400 took just over 7 minutes, temp still 43C.
So just under an hour to completely fill (to indicated 4400 on tank gauge) a large CF tank from empty. Some air certainly lost at a couple of the ventings. When I turned off the external fan the temperature would rise relatively quickly to 60C but turning the fan on would lower it almost as quickly back to the mid/low 40C range. The external fan helps A LOT. Relatively linear fill rate from empty to 4400.
Yes, they can be a little inconvenient as far as adding ice and handling the external "add-ons" needed to cool and produce relatively dry air. But they are also inexpensive and in many cases they are all that is needed.
Happy shooting and stay healthy.
Filled the tank from empty today (about 75 degrees in the shop) using only the Yong Heng with my standard setup- a tool box (holds roughly 2 gallons) filled with ice/water that is regularly replenished and an external ducted fan blowing laterally on the cylinders.
Zero-1000 took 10 minutes, temp at 41C.
1000-2000 took 11 minutes, temp at 41C.
2000-2500 took 6 minutes, temp held at 42C.
2500-3000 took 6 minutes, temp stayed at 42C.
3000-3500 took about 6.5 minutes, temp still 43C.
3500-4000 took 7 minutes, temp 43C.
4000-4400 took just over 7 minutes, temp still 43C.
So just under an hour to completely fill (to indicated 4400 on tank gauge) a large CF tank from empty. Some air certainly lost at a couple of the ventings. When I turned off the external fan the temperature would rise relatively quickly to 60C but turning the fan on would lower it almost as quickly back to the mid/low 40C range. The external fan helps A LOT. Relatively linear fill rate from empty to 4400.
Yes, they can be a little inconvenient as far as adding ice and handling the external "add-ons" needed to cool and produce relatively dry air. But they are also inexpensive and in many cases they are all that is needed.
Happy shooting and stay healthy.