Jimbo2
Registered
I'd like to keep the budget to $3,000 - $4,000. Drive gas will probably be my existing 80's and 100's. Not planning on filling on a boat so electricity is available. Not worried about getting every cu ft out of the supply tank. Portability would be nice but not a necessity.
Several refurbished Haskels available at American Airworks. AGD-32 is high on the list for your application as it is one of the most efficient drive air boosters to use. Can lift gas 4500 PSI with 150 PSI and an abundance of drive air but can also work from scuba drive air. No inter-stage stall issues with this model. Refurb units come with warranty, new LP drive air kit, new HP relief, 2.5" outlet gauge. Same overhaul kits used for a 1979 model boosters works with the 2020 models. Expect to get 2000 hrs or 1,000,000 strokes approximately when driving booster at 60 cycle per minute for inert or 50 CPM for O2. A Haskel booster kept the Thailand soccer team rescue effort going for the last 72 hrs. Haskel has been the choice booster for the Navy Dive Locker. Safe diving whichever pump you choose.