Gas compressors

pattimegdiver

Could someone help me get started doing research on GAS compressors. Need to know if anyone has any comments about any of the companies that manufacture gas compressors. Pro and cons - thanks

__________________
Patti Meg Diver


Remember that great love and great achievements involve great risk

onetime

By "gas compressor" are you talking about air compressors or boosters?

4ster

I think you know someone who knows a little bit about boosters so I will assume you are asking about gasoline (petrol) powered compressors. ;-)

I am in no way an expert since I have just sarted brewing my own breathing gas and will be interested in other comments here.

I sort of stumbled into a Rix compressor:
http://www.rixindustries.com/products_bair.html

I bought an SA3 used from a guy that had put less than 20 hours on it. I did a little research AFTER he offered it to me and found it fit my intended use. The Rix claim to fame is that they are oil-less. They are pretty easy to service in the field too. They are about twice as expensive than other compressors but not having to worry about oil getting into my breathing air makes an oil-less compressor worth it to me, especially since I am mixing gas. Unless you need portability, an electric powered compressor is better than a petrol powered one.

The other thing you really need to set up is a high pressure filter system. Lawence Factor seems to be the diving industy standard. The filters are necessary to absorb moisture and other things like CO before they get into your cylinders. The best set up is to keep the filter under pressure with a check valve and a pressure regulator so there is a little extra plumbing to set up other than just a few hoses and a fill yoke. One last thing that is a good idea is to put a moisture indicator in line after the filter.

After I bought the Rix I took a gas blending class and was pleasantly suprised that my instructor used a Rix in his setup. He had it set up with the ability to continously blend nitrox so he was compressing up to 40% through his. I am not sure that Rix recommends this since they have another, more expensive, compressor for this aplication.

Hope this helps,

Steve

__________________
Steve
"My problem is that I have trouble reconciling my gross habits with my net income." Errol Flynn

pattimegdiver

Thanks for the info, the web site gave me a place to start.

__________________
Patti Meg Diver


Remember that great love and great achievements involve great risk

iain-hsm

Patti
I know you said gas compressor but I think it needs more info to get a reasonable response. By gas compressor did you mean an air compressor driven with a gas (petrol) engine or as in a specific gas. If so what gas, dry oxygen, dry helium, etc because most industrial gas compressor companies supply other gases CNG Argon Neon etc including the non breathing gases.

I suppose a start would be:What Gas do you want to compress?
Is the gas dry or wet? (Note dry gas pumps do not have separators)
What is the inlet pressure? Ambient pressure to say 50 psi
What is the outlet pressure? 2200psig 3000psig 3600psi
What is the charging rate? In scfm or l/min
What is the duty cycle? Intermittent <4hours/day to a full duty of 24/7
As most industrial gas compressors run continuous 24/7 the service cycle is 8500 hours between servicing.
What safety features are required? remote filling, remote controls, RTD cut outs, Blast shield, etc
What level of automation is required?

This would give you best chance to get a quote fit for your application if these minimum specifics could be answered.

RebreatherDave

In addition to gas compressing, "Daffodil" doubles as a WMD producer.....

The left side of the picture contains the "business" end of the compressor.

Attached Images

daffodilstongue.JPG (469.1 KB, 135 views)

onetime

Looks like Daffodil has a bit extra filtration material stuffed between the intake and exhaust.

pattimegdiver

Now that is what I am talking about ..... something that mirrors Ron.

__________________
Patti Meg Diver


Remember that great love and great achievements involve great risk

pattimegdiver

Gas or petrol as you say, powered air compressor for scuba, max pressure 3500psi, no special controls, maybe just a auto-off when it reaches max, dont want to blow any burst discs Although a blast shield would be nice after ron eats taco's

if we go with electric, then we have to buy a generator, the scuba shed has no power, just lights run off of an inverter and battery.

anybody have anything for sale??

__________________
Patti Meg Diver


Remember that great love and great achievements involve great risk