Is it a popular feature to have a dedicated SCUBA compressor aboard a yacht to avoid having to dock to refill tanks? If so, what type/brand is the most common? I know that the best fills come from tanks being set in cold water to avoid the heating of the compressed air resulting in a low fill. And, it might make me a bit edgy having a unit that can pump 3500 psi down in the engine room......just my thoughts.
I have run yachts with them. Cannot tell you what brand. The yachts I've run, had them mounted/installed in the lazarette and not the engine room. The tanks were then filled in the cockpit.
I've never heard of diesel powered dive compresors. Here is Asia it's mainly electrical Bauer compressors they use. You can cool your tank in water or you could fill in stages in order to be able to fill your tank to the max. pressure stated for that tank. I once read about a guy cruising a small boat in the Pacific. He had a dive compressor running from the boats inboard engine. I think he had a belt running from the crankshaft pully to a pully on his compressor. When not filling tanks he just removed the belt. I like this set-up because it's one less motor to maintain, takes up less space and you don't have the noise conventional dive-compressors make.
Hi, There are a lot of yachts that have Dive Comps onboard. The bigger yachts particularly often have them setup to be able to fill BA Set Bottles, I have now made it a standard request in specs to have this compressor powered by the emergency genset. I would say the most popular brand is Bauer and for the most part they are electrically powered. I did google for a diesel powered one and found that the BSAC had a small Diesel powered one for sale on their forums back in 2006. The siting of one is important but most important of all is the positioning of the air intake, attention should also be paid to filters and the use of only the specified oil types. The clanking and banging when they start is only because most of the big clearances at the start and this reduces as things warm up and expand.
You might want to talk to these folks: http://www.browniesmarinegroup.com/third-lung They do a lot of yacht installs as well.
i would recomend a bauer they are very reliable we have used them on all our boats be cautious where you have it mounted and have a good fresh air supply don't even consider the engine room any kind of oil and oxygen don't mix well and you stand a chance of poluting you tanks just some thoughts travler
X2 Bauer in ours. We have 2 330cf tanks that we use as banks and fill when on the run, and when needed, fill individual scuba tanks when / if the banks haven't been refilled. I'm not familiar with Browning much, but do hear positive things about them. If I were in the market again, I'd buy Bauer or AireTex. I'd only consider electric. Not gas or diesel. Please have it professionally installed, and use care when locating your air intake. Use even more care when filling tanks on your own taking into consideration exhaust fumes, and other elements that could end up in your tank.
No matter what product you purchase, keep in mind the power consumption of the unit. Dive compressors tend to draw a lot of power, so be sure that you have adequate capacity in your onboard genset. The Laz is the most common place for the compressor simply because that is where you store the equipment. Therefor it is likely that a heavy cable would need installed between the switchboard in the engine room and the laz.