Nitrox Partial Pressure Blending

[triton94949]

... It just takes practice.

Exactly.

 

[wedivebc]

With Under 40% blends is it safe to run through a compressor. The compressor at out shop had a burn out when this was tried previously. The perpatrators may have been running a higher blend through. Is 40% safe to pump through the compressor?

I have to say, I personally know 2 compressors owners who have had blowouts, including one HP head was blown into a concrete wall due to mixing "safe 40%" blends.
I do not personally know of anyone having an incident with PP blending
That is why I don't do it. Unless you own an oiless compressor such as a Rix I think you are taking chances.

 

[jbisjim]

I have to say, I personally know 2 compressors owners who have had blowouts, including one HP head was blown into a concrete wall due to mixing "safe 40%" blends.
I do not personally know of anyone having an incident with PP blending
That is why I don't do it. Unless you own an oiless compressor such as a Rix I think you are taking chances.

I strarted this thread looking for a more efficient way to load Nitrox. Using the shop compressor and taking a chance of another blow out may not be worth the risk. With out the shop compressor the shop in a sense dead in the water.

The time commitment on loading 4 or 5 tanks using a partial pressure method can be conciderable and I was looking at a way to shortcut it. Sounds as though at the moment Partial Pressure blending is my best bet. I am not sure it is worth the risk on the compressor.

Larry at ScubaToys would be a good person to talk to about continuous blending in a commercial setting.

Thanks for the tip Uncle Pug Larry and I are hooking up on a phone call tomarrow.

 

[usgsdiver]

I am setting up a nitrox filling system and will be doing pp blending, I am looking for the least expensive but fully functioning hyper pure air filtration system. HELP!
Thanks

 

[wedivebc]

I am setting up a nitrox filling system and will be doing pp blending, I am looking for the least expensive but fully functioning hyper pure air filtration system. HELP!
Thanks

There was a guy selling a couple of towers on TDS a month ago. If I stuble across the link I will post it here. I think he was asking $350 for the big one.

 

[BigJetDriver]

I am setting up a nitrox filling system and will be doing pp blending, I am looking for the least expensive but fully functioning hyper pure air filtration system. HELP!
Thanks

Much info: http://www.airspeedpress.com/

 

[usgsdiver]

There was a guy selling a couple of towers on TDS a month ago. If I stuble across the link I will post it here. I think he was asking $350 for the big one.

Thanks for the info--what is TDS?

 

[wedivebc]

Thanks for the info--what is TDS?

Sorry, The Deco Stop. Here's the link to the towers http://thedecostop.com/forums/showthread.php?t=13055

 

[Mako Mark]

you might try a multiple head filling whip, means you blend only once to say, four tanks, this also makes your blends equal. It helps slow flow rates too. I have seen this done in Coz.

 

[padiscubapro]

With Under 40% blends is it safe to run through a compressor. The compressor at out shop had a burn out when this was tried previously. The perpatrators may have been running a higher blend through. Is 40% safe to pump through the compressor?

BullSh**

I know of several compressors that have blown up doing exactly this.. One was definately making 36%, another was making 32%!!!!!

I also know of several fires on live aboards using a nitrox stick, which basically does the same thing.. These were making low mixtures as well..

Even with an oil free compressor like a RIX ther IS STILL a risk although its incredibly small..