Compressor

Since moving into my new house near Narellan, and having 3 Phase on, Heinz is now storing the big K14 at my place. It was sitting for a few years so needed a little work. We spent quite a few weekends stripping down all the condensate valves, filters. We also changed the pump with a "newer" (Less hours approx 900). And after servicing all the heads and valves, we finally have it running like a dream, It has auto condensate drains, and Securis sensor to stop the compressor when the molecular sieve becomes saturated. (Heinz tells me around 150 fills per filter)

Comes complete with a Fill Panel, four fill whips and 4 x 'G' 330 bar Banks. (To be installed)

Pictures to come.

Work still to be completed.
Get Nitrox stick working.
Fill Panel slow leaks. Service all valves.

 

Old Compressor

Rudy, my buddy, and I bought a Bauer Junior II Compressor in July 2006. We now fill our own tanks and also mix our own Nitrox. We also bought a 'G' Size O2 tank and fill assembly including a digital pressure gauge. We have since bought a second 'G' O2 tank.

As of 6th July 2014, cost is about $2.93 per fill for 32% Nitrox and about a $0.50 per fill for air. Including the cost of the compressor and all running costs, we have an average of $1.85 per fill.

Since 27th July 2006, (Date we received the compressor) until 6th July 2014, we have filled 1551 tanks and 180 top-ups and the compressor has run for 694.93 hours.

Assuming a tank fill is $10 and a Nitrox fill is $22 and a top-up is $2.50 (note some dive shops charge a full fill) This accounts for $27,894 in air (519) and Nitrox (1032) fills in 2901 days. (We Dive most weekends). Running costs are around $0.30 per hour, and so far we have spent $2,880 on filter consumables, O2 and oil.

The average fill time over this period is 27 mins per fill. We don't empty the tanks when we mix Nitrox, we blend it mix on mix. For Nitrox mix information check out my Nitrox Calculators (we now use a Nitrox Stick and continuous blend & fill)

How long does a filter last.
This is probably the mast asked question I have had. Its not that easy to answer, however there is a good rule of thumb here. Weigh how much sieve you put into the cartridge. Call it A grams. Then take 20% of that figure. After the cartridge has been fully packed and assembled weigh the complete cartridge call that B grams. When the total weight of the cartridge = (20% x A) + B grams then it requires to be repacking. The reason here is that for the residual time, the time that air is in the cartridge housing, the sieve can only hold 20% of its weight in water. If you stick to this you should not get any water in your tank.

The compressor now resides at Rudy's place and he has built a noise suppressor hood for it.