Recognize this unbranded PCP compressor sold under a brand name? Reliability?

Hey guys,

So I received my "Spritech" orange compressor 2 weeks ago off Amazon and used it for the first time yesterday at the range, twice with no issues I have a 2 questions about this compressor if anyone can share from personal experience:

1. A gentleman at the range stated that when filling his gun with his YongHeng, in order to extend his compressor's "life", once the gun is full, he usually bleeds the air while the compressor is STILL running - then he shuts the compressor off. By doing so, he's making the "turn-off stage" easier on the piston of compressor (instead of hitting the "compressor" button which will turn it off and then bleeding out the air). He compared this to driving a car say, 80mph, and then soddenly turning off the engine at once rather than hitting the breaks, slowing down, coming to a full stop then turning off the engine. It does make since to me, just wondering if anyone has ever tried that with this or with a different comparable compressor?

2. Also, since this is an oil-less/waterless compressor and regardless of the manual, what is the max temperature which you'd turn off this compressor at to prevent early failure in C or F? (I will use silicon oil moving forward, just curious about a recommended max temp for this type of compressors in your opinion

Thanks a lot to anyone able to share!

Ari

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I have a version of this from R&L Airguns. It works. Answer to #2 is simple.......keep as cool as possible, to the extreme........ in air conditioned, dry room. 

MainJim, may i ask you more about your Tuxing? From what i see, they seem little better built. how many hrs do you have on it? any problems? I fill my .25 avenger to 4300 psi. would you buy another if it came to be? My GX E CS3 blowing oil out of moister tube just after 3 weeks, its a sealed unit .they said it could handle 4500 psi.

An update.

I have used the compressor purchased from Vevor 4 times, and after the 3rd fill, I turned it upside down and using my new oil squeeze bottle with the 1 1/2 inch needle, dribbled some silicon oil into the inlet filter while the compressor was running.

A few days later, I filled my Avenger to about 3800 psi without any problems. I have to believe that the oil made it into the compressor, lubrication it, and will extend its life. 

My plan is to oil it about every 4-5 uses. It can't hurt to do this, as any excess oil will be discharged through the open pressure relief valve during this operation. 

Looks similar but slightly different then my Spritech. The accessories look almost identical and the inverter looks identical to the one in my unit which is internal which is one of the reason I got it. Should work fine so far so good with mine.

Thanks Patrick1. However, it’s kind of a challenge to find a dry air conditioned room out at range

Bleeding pressure from compressor befor turning off also empties water from comprssion cylinders. That way you don't leave the cylinders humid. It allows them to come back to room temperature while being ventilated. Good idea on all compressors. My industrial compressor for my machine shop does that. Has a 2 minute automatic shutdown cycle.

Noted ! thanks

Here is a video posted last week of this actual "Spritech" compressor, components wise. I did open mine and can confirm this (btw, the "New Warrior" compressor is built slightly different from what i see). This guy takes it apart and puts it together to make it work like you'd expect it to:

https://www.youtube.com/watch?v=jeKo7dqSfnM

Anyone who used this type of compressor: what is the temperature range at which you must shut it off to allow for it to cool off? On Amazon, with a similar product, the seller said 85C and one user said 60C. Anyone using an external larger fan with it, or modified the internal fan(s)?

I am thinking about adding in a simple thermistor to cut off the unit instead of trying to time it with each run. That way it should cool off when it needs it and will start up again when it's already at the correct temperature.

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You know if you have the capabilityto make something like this then you can still make something like this work by just adding a T and high pressure electric solenoid to release the pressure in the output line when the thermistor cuts off the power. When temperature comes back down there is no pressure in the line and the valve is automatically shut because the temp is lower. Compressor starts without dead heading and no harm.



Just make sure the line down stream has a one way valve otherwise you will lose all your air.







Allen

Interesting video. I wonder if anyone has found a source for a complete rebuild kit that would duplicate all of the required parts used in the video. 

Since you have so many clones of this thing and they are becoming more and more popular from what I'm reading, you can find parts with no issues on Amaz0n/ebay etc.. you just need the time and patience to help you out thru the sourcing process lol

Found this catalog from a company that makes these. Doesn't include big parts like the motor/fan but does include a bunch of components.

http://zypcppump.com/wp-content/uploads/2020/06/Catalog-2020.pdf

In China many manufacturers will use the same sources for the guts and maybe add a different enclosure though they usually just go with a different color. What matters is the support provided in the USA if it breaks down. That is where there is wide variation as someone can order 4 units froma source on Alibaba and have them shipped to the USA and it can often be some guy working out of his garage. They may shut down their business in 6-12 months and no longer provide any support. If they do not have a street address and a phone number to call then I would not buy from them. When you pay $200 more for a compressor at a airgun or tank dealer you are paying for the additional support they provide if there is a problem.

I just visited the Aliexpress web site, and found that they have everything you would want to overhaul my air cooled 12v compressor. I ordered a kit with all the parts needed including new check valves, which came to $8.90 including shipping to me in California.

Everything used in the video Ari posted above appears to be included. 

Estimated arrival date is August 16th. 

I don't need it yet, but for $8.90, it seems like something worth having on hand just in case. 

Well, fe7565 this is some next level technical knowledge

For a more "simple" solution to make things less complicated, this is what I (and many others) did:

I bought this PCP Oil Water Separator filter that is very robust and well made for $58 which is a multi-chamber setup (see photos) consisting of activated charcoal and some sort of obscure beads (Amazon listing says "secondary filtration" without specifying what those beads actually are...) so I discarded of the beads and replaced them with 13X molecular sieve (AKA Zeolite) desiccant. I will later on try Silica Gel Desiccant..which I'll put in between shortened layers/sections of the cotton filters. Traditional silica desiccant absorbs water slowly…the rate at which air moves through in a compressor doesn't allow sufficient time for it to do its job properly. Whereas molecular sieve strains out water molecules as the air is pushed through.
The 13X is a multiple purpose, highly porous, high capacity alkali metal alumino-silicate in the spherical form. It is the sodium form of the Type X crystal structure with pore diameters of approximately 10Å. It can adsorb all molecules that can be adsorbed by 3A, 4A, and 5A molecular sieve. Type 13X molecular sieve can also adsorb molecules such as aromatics and branched-chain hydrocarbons, which have large critical diameters.
as long as you're inspecting the filter body, caps, and threads when checking the 3X molecular sieve every ten or fifteen operational hours, it should be safe.

I fill my red wolf from 130-250 bar in approx 15 mins (filter adds +2 mins or so). Temp doesn't go above 37-38C. I do feel that the pressure is higher when unscrewing the bleed valve btw. This setup works great and for sure provides an added filtration/protection to the process.

I'm sorry to hear that your hose was faulty. My uncle was sold a brand new Volvo once that turned out to have bad breaks, doesn't mean all Volvos are bad. This filter particular doesn't come with a hose. For the additional hose I use the one that came with my MK5 Hill pump which I trust. Ppl who got this 12V compressor are already using the small golden fitter that comes with it with no issues, so I'm thinking adding a heavy duty filter that is X2.5 more robust (thicker, heavier and has more threads on the end caps) with a proven quality hose and pre could upgrade this set up. I could also leave the small golden filter that comes with the compressor aside and only use the big one instead. Time will tell