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Author Topic: New Tuxing 4500psi compact compressor  (Read 6804 times)

Offline Wingman

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New Tuxing 4500psi compact compressor
« on: November 09, 2016, 05:12:46 PM »
After much deliberation I have bought a compressor to fill my PCPs and pony bottles.
I was torn between spending decent money on a Bauer JNR or just take a risk on a cheep Chinese job.
The new Altaros booster looked great but it still relies on a regular work shop compressor to operate which would mean I would have to spend more money upgrading my current workshop cheapo or it would soon let me down.

So after searching many cheap Chinese compressors I found this one that is very well priced and fairly new to the market.

https://www.aliexpress.com/item/PCP-Inflator-Electrical-Air-Compressor-for-airgun-cylinder-High-Pressure-300Bar-4500psi-Paintball-Refilling-110V-220V/32757013722.html

Size   L 35cm x W 18cm x H 34cm
Net Weight 17KG
Power 220V-240V 50HZ  or  100-130V 60HZ
Motor Power   1.8 KW  Pressure :300bar/4500psi
Inflating speed 2800r/min 
Noise78DB

Fill an empty 500cc bottle to 300bar in about 5 minutes and direct airgun cylinders topped up from 120bar to 300bar in 2 mins

It boasts a new design water jacket for better cooling than the open tube tube compressors and seems to have some really great reviews so far.
Buyer reviews here:
https://www.aliexpress.com/item/4500PSI-compressor-300bar-Electric-portable-pump/32691757608.html?spm=2114.13010208.99999999.264.AAz6YJ

I had no real need to fill 12ltr dive bottles with a compressor (which Im sure this one will do) so a lightweight will suit my needs.
It will be mainly used to direct fill my PCPs, top up my 500cc backpack bottle from 180 to 300bar and top up my 3ltr pony bottle from 180bar to 240bar.
Between them all I have more than enough air for an outing.
I had some reserves about build quality but it is a very simple unit and I had the seller pack in enough piston seals, O rings and plastic seats to rebuild the thing ten times over for a very reasonable $7 extra.
The Seller was extremely helpful and seems to know his product with full back up service parts available. 
Fuxing my Tuxing looks to be very simple and it lends itself to loads of upgrades such as a larger oil/air separator.
I just received a litre of high quality Special Bauer full synthetic breathing air compressor oil which cost me a crazy $70 but there is enough for 4 services. (1000 hour intervals)

The unit arrived in New Zealand from China via TNT in a very speedy 4 days! Currently being held in customs but I hope to see it any day now.
Ill add to my review as I spend some time using it.

My expectations are realistic with any Chinese purchase but the price seemed right on this one.. It is really not much more than a motorised 2 stage hand pump and keeping that in mind the price is very reasonable.
I will be using it for very short intervals not hours on end like the shoe box compressor etc require so wear and tear should be a lot less.















« Last Edit: November 17, 2016, 09:58:03 PM by Wingman »

Offline k1w33d

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Re: New Tuxing 4500psi compact compressor
« Reply #1 on: November 09, 2016, 06:23:39 PM »
Nice. I was looking at one and it was $535.50 NZ total with shipping.

https://youtu.be/AMgBM-bmY5I

I know nothing about working with high pressure air apart from what I have been reading/watching over the last few days. Anyway I would probably start off with a hand pump if I ever converted the 2240 to HPA. I would likely be using a 13ci bottle so should be able to manage.
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Offline Wingman

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Re: New Tuxing 4500psi compact compressor
« Reply #3 on: November 18, 2016, 08:37:48 PM »


The compressor showed up well packed and damage free.. the seller emailed me several times with operation hints and tracking details while it was in transit and has been very helpful in general.
I was impressed in its build quality even before I got it out of the box... seems very well made which exceeded my expectations.
I had intended on changing out all the O rings with quality ones and foster fittings with European made stainless steel items but again I was pleasantly surprised to find no leaks and the brass foster fittings supplied with this one are not as sloppy as most of the  8mm Chinese made ones.

I did however strip it and lube all the rubbers with silicon grease and flush the remains of the mineral oil from the sump that they partially drained after testing the unit and prepping it for international shipping.
Nice to see that it was actually tested and the QC in place is better than most Chinese companies.
There was a little bit of metallic filings in the oil I drained before flushing the sump out but Id say that's pretty normal with any machine running in process.

HPA Compressors expose their lubricant to both high temperature and pressure. The seller supplied mineral oil definitely undergoes breakdown into black residue in the high pressure cylinder. This fouls the rings. The situation is worse if you had oil seepage in shipping that wasn’t prevented or cleaned out.

There are many specialised compressor lubes like the Bauer lube Im using. These have a higher temperature before break down and are purported to extend intervals between compressor rebuilds. Mind you, you still need to regularly change the oil. The seller/manufacturer hasn't quoted any oil change intervals or oil type for that matter. I am reading the diving forums and oil change interval seems to be somewhere around 50 to 100 hours (or one year if that comes first) for conservative owners.

So as I mentioned I went overboard and spend decent coin on some full synthetic Bauer breathing compressor oil as if there was any small chance of the oil vapour entering any of my PCPs it is totally safe from compression related explosions. It is also just an all round better oil for the protection against wear and heat on the internal components and lasts 3 times as long before services over std mineral oils. It also should suffer less carbonization than the original oil. 
Although the bottle states the oil changes should be at 1000 hour intervals I will do the first one at about 50 hours after a good running in period.

I took about 200mls to fill the oil to the mark on the sight glass so the litre I bought will last me a while.






After connecting it all up and testing the water pump for good flow, I fired it up for the first time just with a blanking plug in the whip line. The liquid filled manometer climbed quickly to over 4500psi and I shut it off.
The compressor was surprisingly quieter than I expected and sounds very smooth.
One last test before filling a bottle was to test the supplied manometers accuracy. I screwed it into a DIN adaptor and tried it on several air cylinders at various pressures and tested it along side a good quality Sabre manometer I have and know is accurate. Happy to say the compressors gauge reads very true.
 
So first cylinder fill test was on my .30cal pistol. I hooked it up and turned it on and it filled 55cc from basically empty to 240 bar in less than 30 seconds!

Next was my 3.1 litre buddy bottle, it took just over 6 minutes to top up from 170bar to 240bar.
Im impressed. It does exactly what I want it to do and with those fill times it barely got warm!
The compressor has very noticeable sweet "hot synthetic oil smell" to it any those of you who have ever raced two stroke motorbikes will know this smell very well.. not unpleasant.. in fact quite the opposite for me.  I am not sure where the smell is emitting from but will monitor it. It also has the new electric motor smell as Im sure most do in the first run in period.

I took a quick look at the cotton whip line filter and it was still dry and clean. No oily smell present there so I dont think it in the compression chambers.



I have a 4500psi 500cc carbon fibre bottle and DIN valve arriving soon the same as the one in the vids above that fills from empty in 5 mins so if I use it as a back pack buddy bottle it will only be getting topped up from 170ish bar to 300bar so will be closer to 2 or 3 minutes use.
With these very short run times and over all low temps I hope Ill get plenty of hours out of this compressor between rebuilds.
An overhaul of the second stage valves and piston rings looks very easy and the compressor comes shipped with enough of these spare parts to do these rebuilds at least twice.
I actually ordered a kit of 10 rings for an extra $6.90 just to have on hand as they seem like the only service parts that aren't generic and easily found locally.
The O rings on the compressor are all off the shelf N70 metric sizes and easily acquired locally for most people.
If or when I need to replace the plastic second stage valves I will turn some decent ones up on the lathe from some Acetyl or similar rather than use the replacement plastic ones it came shipped with.

I still intend on adding a larger volume oil/water separator to the unit to get the driest and best quality air into my cylinders so will update you on that shortly.

Early days with it but I will add to my experience with it here as I feel the need.

« Last Edit: November 20, 2016, 07:55:39 PM by Wingman »

Offline Coelacanth

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Re: New Tuxing 4500psi compact compressor
« Reply #4 on: November 18, 2016, 10:12:52 PM »
One will be mine, oh yes, one will be mine.

Offline Wingman

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Re: New Tuxing 4500psi compact compressor
« Reply #5 on: November 19, 2016, 08:59:07 PM »
A quick update, I found the source of the sweet hot synthetic oil smell,  its is coming from the crankcase breather as the oil warms up.. nothing to worry about there...



More good news, using a very scientific "sniff test" I cant smell any odour from the whip line air at all so no oil blow by seems to be present there.

I know I said I wouldnt do it but for interests sake only I decided to top off my 12 litre Scuba tank just to see if it could.







Now excuse the blurry cellphone pics, the workshop had poor lighting and the compressor has a vibration when running.. 
I started with 190bar (2750psi) in the scuba tank and it is a 241bar  (3500psi) WP tank so that was my target pressure.
The ambient compressor and water start temperature was 20.2 deg C.





After every 5 mins or so of running I manually released the blow off valve to purge the condensation in the pump which gives a gentle hiss and shoots a small amount of water vapour from it.






This is not a compressor you can just turn on and just walk away from, it requires constant supervision and manual interaction. There are no auto pressure shut off switches or auto water bleeds.. its up to the operator to keep it doing what it should.

After 24 minutes of continues running the Scuba tank reached 241bar (3500psi).
The compressors temperature gauge read 35.5 deg C. The cooling water in the bucket felt about body temperature. While the pump on the compressor was only warm to touch the crank case was much hotter, not so hot that I couldnt hold my hand on it but hot. I could see the oil in the sight glass was also much thinner.
The seller told me in an email to use a large bucket for cooling water for best results or add cold water as necessary. He also advised to open the bleed screw on the compressor before turning off the compressor when the vessel has been filled.
There was no English user manual with the compressor so this info was valuable.



Although it seems the compressor is capable of larger dive bottle fills I have no idea of the units longevity should it be used for 20 to 30 minute top ups on a regular basis. I would certainly not recommend filling anything bigger than 3 litres from completely empty in one go without a regular shut down cooling periods.
Personally I will stick to the 2-10 minute fills on smaller air tanks for my compressor.

I opened the Whip line filter right after the fill and inspected the cotton filter, there are no signs of oil but the filter was damp. There were tiny beads of water on the filters inner surfaces closest to the compressor, the dive bottle side was dry... so again this compressor will benefit from a larger volume water/oil separator even on shorter top ups.
Mine is in transit.


« Last Edit: November 19, 2016, 09:02:46 PM by Wingman »

Offline Wingman

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Re: New Tuxing 4500psi compact compressor
« Reply #6 on: November 20, 2016, 07:39:20 PM »
I had my first O ring blow out today on the small whip line filter, the O ring it came fitted with was a 20mm x 3mm which does not fit correctly.



There was a spare one in the kit but the supplied o-rings are too large in cross section. I have replaced it with a Viton 75 20mm x 2.5mm which seals in a proper manner. Too large of an o-ring means the fitting never attains metal to metal closure to house and buttress the o-ring. This leaves the rubber O ring sandwiched and protruding out of the join and has to resist the airs force all by itself... I doesnt last long.

Too large in cross section causes the seal to have a section of o-ring resisting huge pressure without metal supporting it against that pressure. Instead, only lateral friction keeps the o-ring seal and that eventually fails. You can improved it a bit by using more torque, but ultimately, it's just squished rubber between two flat surfaces resisting force parallel to the metal faces.

With a smaller cross section 0-ring, the seal acts more like a dowty washer. The rubber only seals. Metal reinforces the rubber against the force. The smaller o-ring sits inside its channel. Directly metal to metal contact seals in the o-ring and buttresses it fully. The compliance of the rubber lets the pressure push it up against the now much smaller gap to form a non-failing seal.

Here is what I meant about buttressing the o-ring.



The Chinese are notoriously bad for fitting the wrong size and compound O rings to their HPA products, the air filter's fitting is a prime example of an o-ring channel that is defeated by an over sized o-ring. The o-ring supplied with the filter is monstrously thick. It will never fit completely into the channel. Too large an o-ring means the fitting never attains metal metal closure to buttress the o-ring. This leaves the rubber to resist the force all by itself. Hence, they readily blow out.

Im somewhat  looking forward to a full tare down of this compressor on it first service (or failure) to see what other seals could be improved for better over all longevity.

Offline Pauly5

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Re: New Tuxing 4500psi compact compressor
« Reply #7 on: November 20, 2016, 09:24:18 PM »
Facinating, am enjoying this. It's interesting how you are tuning this pump. If someone were to buy it and use it according to the instructions it comes with, would it function well? You have the knowledge about what to look for and fix it, but would the average consumer run into problems?
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Offline Wingman

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Re: New Tuxing 4500psi compact compressor
« Reply #8 on: November 20, 2016, 10:22:13 PM »
There are no instructions that come with this compressor at all. It came shipped with a 4 page leaflet in the box but it is all in Chinese. IMO these compressors need a comprehensive user and service manual in English with clear illustrations..
The 3 vids I posted in the first post is the only info I have found on this compressor.
I am not so much tuning it more testing it in its factory state with a little more than the average consumers HPA knowledge and sharing my experience.
I have linked this review to the buyers feedback on this sellers compressor listing for all buyers or perspective buyers to help them decide if this unit is right for their needs or for those that buy one, it will serve as a resource of information for initial setup, correct operation, service and trouble shooting.
I think the average buyer could fry this little pump in a very short time or run into continuous issues with leaks etc if they do not have some technical/mechanical skills or knowledge.

« Last Edit: November 21, 2016, 08:17:42 AM by Wingman »

Offline Sparrowgun

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Re: New Tuxing 4500psi compact compressor
« Reply #9 on: November 25, 2016, 03:04:11 PM »
Sup guys. My one came in the other day and finally got it set up and oiled and rolling. It came with an english manual though interestingly, not detailed at all really but had the main points needed.

Did a quick test fill on my R3M and it went pretty smooth. How the flip do I embed a vid?


Heres the link:


Wingman, can you embed it or do what ever? Chur to the chur bro.

First impressions are pretty good. The silver paint is a bit crap in parts but what ever, this isn't a high end German machine.
The little fountain pump works pretty well at moving water to and fro the bucket and cools the unit pretty quick. Pulled it out my car at 40°c and it dropped down real fast once I had the water going. I want to get a small radiator and hook it up so I don't need to fill a bucket every time I want to top off my tanks. Don't really need to but what the heck. Could probably do with decent fan blowing across the motor for better cooling.

Have yet to fill my buddy bottle so will see how that goes temperature wise. May do that tonight once I have my tools at home.

Mod edit: Embedded it good bro..
« Last Edit: November 25, 2016, 03:36:32 PM by Wingman »

Offline Wingman

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Re: New Tuxing 4500psi compact compressor
« Reply #10 on: November 25, 2016, 03:42:50 PM »
....and my P rod pup from dead empty


« Last Edit: November 25, 2016, 03:45:12 PM by Wingman »

Offline Wingman

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Re: New Tuxing 4500psi compact compressor
« Reply #11 on: June 15, 2017, 05:25:51 PM »
My filter turned up and I made a filter element from some Pollycabonate thin wall clear tube and picked up some activated carbon from the local pet shop. It is used in fish tank water filters too. I cut the cotton filter that came with the filter body into shorter lengths and added some silica gel from a desiccant bag that I scored from some jet engine shipping boxes. I will order some of the colour indicator silica gel to mix in too to show when the moister content has peaked.



My 500cc carbon fibre backpack bottle also arrived which filled from empty in just over 4 mins. It tops off from 180bar to 300bar in about a minute and a half. 











I have put lots of hours on this little compressor already and it is still going strong. The larger filter takes a little longer to pressurise which adds to fill times but there is certainly no moisture or oil entering my PCPs or air bottles.
The oil in the sump has just started to darken up a little in about 15 hours use other than that there is nothing new or untoward to report.
Not even a leaking O ring. Very happy with this little compressor.







Offline Wingman

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Re: New Tuxing 4500psi compact compressor
« Reply #12 on: June 15, 2017, 05:36:48 PM »
Well still going strong on all the factory fitted O rings so Im impressed. I have new Viton O rings on standby for a rebuild but Im interested to see how many hours the std chinese ones give me.
I pushed it a bit hard with 35 min run times topping up my big 12 ltr dive bottle and the sump oil got quite dark. Although Im sure the oil hasnt lost any of its lubricating properties its just a little carbon but the OCD side of me took over and I decided to change it and take the head off to check out the upper piston rings.

The inside was spotless, no oil on any of the upper parts and no signs of dieseling in the compression chambers. There was no carbon build up anywhere in fact so I think the oil has darkened just from it heating up in the sump.

I decided to only run it for a maximum of 20 mins at a time now before letting it completely cool down, this will keep the oil clearer longer and be much easier on the internals.
A friend posted an English manual for it as mine did not get shipped with one. Interesting to read it says "dont get the compressor any hotter than 60 deg c on the upper head temp gauge", I haven't been able to get mine past 42 deg even on long run times. It seems the lower sump will overheat long before the water cooled head does. Maybe a better cooling fan would help the bottom end.












Offline chendkoi

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Re: New Tuxing 4500psi compact compressor
« Reply #13 on: June 25, 2017, 08:51:07 PM »
Hi Wingman,read your review and have ordered Tuxing off Aliexpress to UK.Any idea where I could get the components to make up a dry-pack same as yours.Thanks if you get back in touch.Chris Hendry UK

Offline Wingman

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« Last Edit: June 25, 2017, 09:33:55 PM by Wingman »