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Dive Compressor for 85' recommendations?

Discussion in 'General Yachting Discussion' started by goplay, May 4, 2008.

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  1. goplay

    goplay Senior Member

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    Sausalito, CA
    Does anyone have a recommendation for a dive compressor?

    Electric, gas or diesel? For the last two, how have you dealt with exhaust?

    After thinking about this, has anyone heard of installations using a hydraulic compressor, driven from the engines or generator? That would seem to offer the best of higher CFM than electric compressors (faster fill time), potentially smaller size since there is only the compressor and no motor, and the exhaust problem is dealt with existing systems.

    Any other considerations for a compressor?
  2. AMG

    AMG YF Moderator

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    I have used this brand and had a stand alone electric unit in the lazarette. But they can be sensitive to rust and need to be attended and regularily used to work properly. Don´t know if filling air from the engine room is recommended..? http://www.bauercomp.com/norfolk/breathingair
  3. GrahamF

    GrahamF Senior Member

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    Hi Goplay

    We had a Bauer Compressor on a 84. You can also look at Brownies dive compressors as they are the biggest company in the States if i am correct and a lot of big yachts in the US have them on board. Here is the link http://www.tankfill.com/'. I have not come accross or heard of the system you are talking about. Good luck
  4. GrahamF

    GrahamF Senior Member

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    I agree with AMG. We had our compressor in the engine room, not a very good idea unless you have a fresh air feed from outside the yacht into the engine room. Regarding the rust the best thing i came accross to help prevent it was a product called corrosion block.
  5. goplay

    goplay Senior Member

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    Thanks for the replies. I wouldn't want to place a compressor in the engine for a number of reasons, including fresh air supply, but also because of the excess heat in that space. I have a technical space in the crew area that could be used.

    An electric Brownie is likely my default approach. I'd like to investigate a hydraulic driven compressor but probably too much hassle and expense relative to the benefits versus a Brownie.
  6. rcontrera

    rcontrera Guest

    Your gen set will determine what size electric compressor you can install. The minimum size to operate a small 3.5 CFM compressor (fills a standard 80 scuba tank in about 20-25 minutes) is 7kw. You can mount the compressor just about anywhere you want as long as you route the air intake to a cool fresh air source. Be aware that heat is the biggest enemy of a compressor so if mounted in the engine compartment, you need to have LOTS of fresh cooling air directed on the compressor head. There is a fairly new compressor system that has an inverter drive so that it puts out 4.2 CFM (fills that standard 80 in 15 to 20 min), has a soft start to minimize start up draw, automatic condensate drains, automatic shutdown and is all stainless steel base and fittings. The draw back is that is about half again as much as a standard powder coat or even standard stainless compressor.

    No matter what compressor you decide on, make sure to get automatic condensate drains so you don't have to crawl down to where ever you have it mounted every ten or fifteen minutes to blow it down.

    One other thing to think about is where you plan on setting up the fill station. If it is right next to the compressor, then you should be good right out of the box. However, several installations have a long high pressure hose from the compressor compartment to a station on deck. It adds a few bucks but is really worth it to be able to start/stop the compressor remotely.

    Just my $.02

    Ray
  7. travler

    travler Senior Member

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    i have a bauer mounted in the lazzeret &and the fill station there also works just fine we do have the fresh air source coming from out side one thing you might consider when you orded your compressor is to opt for an enclosed motor in stead of the standard model

    good luck travler

    an after thought bauer is also located in the bay area /also there is a guy in your area that makes nitrox equip also
  8. goplay

    goplay Senior Member

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    Thanks guys for all of your replies. As a follow-up I ended up buying a Nuvair. With a bunch of options (like stainless steel, remote fill station, auto drains, auto shutdown, etc) it was still about a third of the price of a Brownie with equivalent capabilities. It is installed in an aft equipment room, not in the ER, with the fresh air snorkel placed near the cool air duct in a common area. I can fill inside in the crew area or on the swim platform with the steel tanks immersed in a tub.

    I have 3 phase power internally on the boat essentially eliminating the need for a "soft start". I also have a portable air cooler I use to direct cooler air when it is operating.

    We've got 30 hours on it already with many dives in the Bahamas and Virgin Islands!