Air Venturi Compressor
This does look more interesting as more images and the manual are now available. Outwardly, it is in the similar form factor as the MrodAir, but I can see some significant differences.
https://thearmsguide.com/11493/air-venturi-4500-psi-air-compressor-airgun-refills/
1. The water oils separator / filter unit is much larger than the Mrodair’s. The filter appears to be integrated into the same cylinder as the separator. Can’t tell what the drying media is in the cartridge. Hopefully molecular sieve. I would like to see that the separator volume is sufficient and not fully consumed by the filter cartridge. There is a overpressure burst disk – good.
2. Output of the high side goes through a coiled cooling segment before entering the separator.
3. There is an air intake filter
4. Water cooled, appears self contained.
Speed 20 minutes to top off a Great White sized tank 3000 to 4500.
Can’t tell anything about cooling system or build quality without more details and machine tear down. If the build quality is sufficiently better and speed moderated, it could possibly be OK.
User manual link http://www.airventuri.com/site/manuals/av-comp4500-py-a-7458-manual2.pdf
Pricing looks to be $1300 street
Things are looking interesting this year for PCP compressors
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I just ordered one, I hope it’s good. We shall see.
Maybe they think that the tampon attracts enough of the moisture to worry about desiccant.
No cooling coil between the stages that’s a big minus on my book. One unit reviewed and that’s all we know, even nimrod got lucky with couple of units so only time will tell how bad or good this is.
Wouldn’t be that hard to put reduction between the engine and pump or use completely different spec engine for that matter. But speed sells better and faster.
Marko
Part two is up http://www.pyramydair.com/blog/2017/01/air-venturi-air-compressor-part-2/
Finally, some images with the panels removed. I identified as much as I could and annotated their images. Click for higher resolution.
I like the cooling coil after the high side output. Cooling the air to enable condensation before separation is a good step.
We now know the cartridge filter in the oil water separator cylinder is not a drying filter. it’s a big particle filter that doesn’t remove moisture.
Bleed valve looks to be one that sprays everywhere rather than into a nozzle. You can’t attach a tube for a waste catchment.
The thermal sensors are on the cooling jacket of the high side. So, they don’t actually measure the higher temperatures in the cylinder. I did my measurements directly on the high side air output, where the temp will be higher and closer to what the cylinder head is experiencing. You can’t directly compare the temps in the AV review with the ones I measured on the Carette. That’s cooling jacket temperature vs air output temperature. Cooling jacket temperature is, of course, going to be lower than air output temp.
Cooling jacket temperature in the AV review (65.3C) are higher than the high pressure AIR OUTPUT temperature of the Carette (35.3C). That shows you how much more stress the AV’s high pressure stage must endure to achieve its speed.
I can’t determine how well the wring is grommeted for entry into the control box. At least there is a control box instead of Mrod’s exposed line voltage wiring.
Definitely a two stage design. There isn’t a stacked stage on the high side. If i were a dual stack, there would be one more pressure tubing and the input would be lower on the cylinder stack. The lower part’s piston is merely acting as a mounting platform for the actual high side piston.
Air intake filter is unremarkable looking. It is too small to contain a meaningful amount of desiccant. There is no mention of any dessicant in the manual for that filter. I think the early information that there is desiccant on the intake are error. This looks like just a plain particle filter.
It was entertaining to read, by the looks of it it’s just another version of the same family. They just used carbonfiber looking parts to hide the compressor parts from view.
The crankcase looks pretty same as nimrodairs. And that fill whip looks dead cheap.
Lookin this and knowing what’s inside the carrette, you know my point.
Marko
There seems to be a desiccator, but it is a small amount of atmospheric pressure media in the air intake filter.
That can’t be effective nor last long.
More info …. http://www.pyramydair.com/blog/2017/01/air-venturi-air-compressor-part-1/
It is an entertaining read.
Look at the featured fitting in the review….
I hope this is not what is being shipped to users.
So they just went the short rout (cheap) and stuck a freaking big tampon in it and called it a day. Not very impressing engineering. What other shortcuts have been done?
Marko
The big filter cartridge turns out NOT to be a desiccant filter. I guess we can think of the big cylinder as a filtered water oil separator.
And with what came first to ruin the family rep, there is a lot to prove.
Personally looking at guykuos review its pretty easy to choose over this and the carrette.
It is the same general design and working speed. I would want to see a test and full tear down before hopping into this genre machine.
Things may have been addressed, but with that quoted speed, it is still fighting the same physics using a similar configuration. To win you have to…
A. Use the same physics, but greatly improve materials quality and machining <– Is that much better build attainable at this price point?
or
B. changes the physics with reduced speed and improved cooling. Even better, if you also improve build quality along with change the physics.
This unit will need to prove it is better than the rest of its “family”
90 cu-in. Tank: 0 to 3000 psi in 10 minutes; 0 to 4500 psi in 15 minutes
74 cu-ft. Tank: 0 to 3000 psi in 35 minutes; 0 to 4500 psi in 52 minutes; 3000 to 4500 psi in 17 minutes
88 cu-ft. Tank: 3000 to 4500 psi in 20 minutes
74 CF 0-4500 52 min (1.42 CFM)
88 CF 0-4500 = about 125 minutes then.
that is because it is….
Some people prey on those that don’t know any better
Somehow his 97CF 550 cu inch tank is bigger than your 88CF 550 cu tank :confusedn:
Looks like an mrodair compressor clone that cosst$300 more. Might as well go with mrodair until the price drop down below $1000.
Looks nice! Hopefully they addressed the major issues with the design.
The way one puts the metal hook through the filter media and the way it looks suggests to me that it is not chemical sieve. Could this be just a fibrous particle filter or oversized “tampon?” That would leave the compressor without an actual high side filter to bring moisture down sufficiently.
I guess we will find out as more info becomes available.
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…and…?
I took the plunge and ordered one a while back – it just shipped today. I guess I find out how well it works in about a week. (Or at least how well it works initially…).
GsT