USUN XB30 Drive with "Shop" air?

[happy-diver]

That's where you take cylinders of drive gas so keep proctastinating forever and keep your bucks in your pocket

For cylinders of drive gas or rebreather cylinders of rebreather gas

 

[trimmatters]

That's where you take cylinders of drive gas so keep proctastinating forever and keep your bucks in your pocket

For cylinders of drive gas or rebreather cylinders of rebreather gas

Never fear, those will feature too.

If life was just a dive trip... but aside from redundancy considerations for the extremely remote cave trips we do, life has some many other adventures that involve tyres.

besides, isn't playing with toys parts of the fun? 12v compressor(s) aint that expensive.

 

[happy-diver]

Yeah mate but you scarred me linking that grands worth of 4x4 tyre pumper

Thesaurus results for SCARED

Synonyms for SCARED: afraid, frightened, terrified, horrified, shocked, fearful, alarmed, worried; Antonyms of SCARED: fearless, unafraid, daring, adventurous, brave, bold, spirited, audacious

www.merriam-webster.com

Now that's a tyre pumper

Not the noisy rattly slow piece of junk on the right but the twins bolted to the bed on the left

 

[trimmatters]

It may well be the right answer is taking a "few" Kings compressors and accept a fail rate.

For those that know Australia, when you're in Victoria, South Australia (me), or even some of New South Wales, Mount Gambier is "Cave Country".

Its reasonably well serviced by dive shops, access to dive air, lodges, accommodation, shopping centres, restaurants etc. Its only a 5-9 hour drive from home, and most trips are for 2-7 days. Its in a reasonably sized regional centre.

When you head to "The Nullarbor", you're heading completely off grid, minimum of 20 hours driving from a dive shop, let alone somewhere that has what you need. And off grid means off grid. That's everything you need to take, so full sized compressors aren't desirable for some trips. Do yuo know the payload of your 4x4? For a Ford Everest its 629kg, that's not a lot to play iwth.

If 3 (CCR divers) are out there for 2 weeks and need only to boost O2 butt-cylinders every day, you're going to blow a lot of storage cylinders of drive gas. Sure, you can organise some 300bar 15ls, but is that really cheaper/easier/less bulky/less risk than a 12v setup?

A 12v compressor might just to do the same boosting job in 30-40 min a day if done right, adn that's what I'm looking to validate

Re bailout gas etc for the actual dives, plan them right and you can consolidate your bailouts toward the end of the trip, drawing gradually closer to home, switching cylinders etc so you're diving with the enough gas at all times.

The size/shape/depth profile of the larger Australian cave systems are well known. I'm not suggesting this is optimal, but rather a attempting to validate it as a realistic alternative.

Oh, those Mount Gambier trips. Sometimes you need to stay somewhere without a supplied compressor. A small on-board 12v compressor will then allow for top-ups between dives without requiring excess weight on the trips of extra cylinder nor 50kg Bauers

Anyway, life is but a series of trade-offs

 

[1fspeed]

I use a Home Depot Husky 20-gallon compressor with an XB30 to boost oxygen. It stays within its 50% duty cycle, but I fill it slowly (1 psi/sec into my 3-liter breather bottles). Without the 20-gallon tank and 200 PSI filling pressure, imagine it would run nearly continuously at high pressures. I don't think you'll be happy with a pancake compressor.

The compressor is loud, so I moved it to the attic of my garage. I ran copper supply/cooling lines with a drip leg before the USUN. The air then goes through a moisture separator and a desiccant filter.

If you mount the USUN consider running the exhasut drive gas outside. I removed its tiny muffler and ran the exhaust into the attic of my garage via 1/2 copper. Compared to the racket it made before, it's now nearly silent.

ps. I should stress that I have no real idea what I’m doing—so for your own safety and the continued structural integrity of your garage, please don’t take this as advice. Also, if anyone out there with actual knowledge spots something I’ve done wrong, I’d be immensely grateful if you’d let me know—preferably before anything explodes

 

[trimmatters]

Yeah mate but you scarred me linking that grands worth of 4x4 tyre pumper

https://bossairsuspension.com.au/shop/compressors/com-px07-complete-12-volt-air-compressor/

I've ended up scoring this package for AUD250.

That one at AUD1,000, that included the storage cylinder and, that's a part of the difference.

This Bossair one is half the flow rate of my home Stanley shop compressor (linked earlier), and with the same pressure range and rate for continuous duty cycle (I will not be seeking to test that statement and more than absolutely required ).

Again, this is set up is understood to be a compromise and will always include redundancy. But that's remote cave diving for you.

Once I source a storage cylinder and workout how to assemble it all, I'll do a post on the end result.


Oh, as for "tyre pumpers", I've been promoting the advantages of an LPI -> Nitto fitting to our cave community here for a little while now.

 

[trimmatters]

The compressor is loud, so I moved it to the attic of my garage. I ran copper supply/cooling lines with a drip leg before the USUN. The air then goes through a moisture separator and a desiccant filter.

If you mount the USUN consider running the exhasut drive gas outside. I removed its tiny muffler and ran the exhaust into the attic of my garage via 1/2 copper. Compared to the racket it made before, it's now nearly silent.

ps. I should stress that I have no real idea what I’m doing—so for your own safety and the continued structural integrity of your garage, please don’t take this as advice. Also, if anyone out there with actual knowledge spots something I’ve done wrong, I’d be immensely grateful if you’d let me know—preferably before anything explodes

Ok, I just checked and it was your thread that was about the silencer. Strong work and I've shared it a few times already.

FWIW, I took your advice and emailed Sunny for the thread size and to confirm for my model (also XB30)

That "silencer", lol, that it comes with is apparently "PT 3/8". I have no idea what "PT" is, BSP, NPT, or whatever, but I'm sure a hose shop will sort out an adaptor once I have the muffler.

But Sunny also confirmed any locally source muffler is completely fine to use.

 

[1fspeed]

Ok, I just checked and it was your thread that was about the silencer. Strong work and I've shared it a few times already.

FWIW, I took your advice and emailed Sunny for the thread size and to confirm for my model (also XB30)

That "silencer", lol, that it comes with is apparently "PT 3/8". I have no idea what "PT" is, BSP, NPT, or whatever, but I'm sure a hose shop will sort out an adaptor once I have the muffler.

But Sunny also confirmed any locally source muffler is completely fine to use.

Thanks - I tested the silencer at the hardware store with a brass 3/8” NPT fitting. It threaded together just fine, but if I understand correctly, may require a sealer if used in a completely air/fluid tight situation.

 

[grantmac]

What about one of the manual lever boosters? Obviously not great at home but perhaps the best when remote.

 

[trimmatters]

What about one of the manual lever boosters? Obviously not great at home but perhaps the best when remote.

Thought has crossed my mind.

But I need onboard inflation /compressor for other two and four wheel adventures.

And this seems like a fun project.