yet another Yong Heng post from a newbie...

Start your compressor up and let it run for a minute or so then fill your gun. I think it will be fast so unless you have an auto stop on the compressor that you can set to turn off at 2100 or so then you have to stand by and shut it down manually. You already seem to be pretty aware of these things. Guys usually fill a little above their desired pressure because when it cools then pressure drops to the desired level. However your 2000 psi is on the lower end of most users and you probably will not have as much heat so don't overfill till you get some experience with your machine.

Keep us posted enjoy.

What gun are you filling? It doesn’t take long at all to fill my prod or my veteran and I have to keep a close eye on the pressure gauge. It fills my 90ci bottle rather quick too. If your filling guns directly I’d guess a Yong Heng would last a long time. As far as getting hot is still recommend a bucket of cold water with frozen bottles of water in it. It doesn’t take long for the temp to start climbing with ice water flowing through mine. They’re worth the money in my opinion and I’d have no worries buying another. 

i would run some cold water in a 5gal bucket to fill a gun as it does heat up quick. should top off in short time 1min or so.if thats all your running it the filter that comes with it should be enough to keep the air dry and clean.

I use a Yong Heng direct filling edgun R5M from 120ish to 250 BAR and the compressor gets to 45C(113F) when finished, on water. I would recommend always running the water pump every time you use the compressor for filling. Fill time usually are usually under a minute so don’t leave your gun unattended  



CJ

I fill a large tank 109cuft and use the filter your talking about, works great.

Just thinking out loud here. Wonder if one couild make a sealed system for that short of run time with maybe something the size of a purex jug or just a gallon water jug with the pump sitting on the bottom and return hose up the side near the top. that way no open containers like buckets. Would make a much cleaner operation and be ready to go anytime without getting buckets water and such.

I am still running the stock moisture trap that the YH came with. Only runs for less than a minute so after I top off my gun I remove the filter and let it air dry and it comes with spares so I always pop in a dry filter before a fill. Adding another moisture trap I would think would ensure drier air I just don’t feel it is necessary for my use. I also make it a habit to rebuild my airguns 1-2 times a year so if there was moisture it gets cleaned out.



CJ

I think 150 to 200 bar in around a minute or two is probably doable unless your gun's reservoir is huge. I know when I first topped off my Wildcat from 150 to 230 and I was amazed at the speed. It felt like about 3 minutes or so....but that was with the small volume filter that came with the pump. You've got to remember that the pump has to pressurize everything in the line before it can fill your gun. Like most, you'll graduate to some sort of bigger, more efficient filter system and that will dramatically slow down the process. Those things are as big as the tank on most guns and basically you're filling it too so you'll need to roughly double the fill time. 

As far a cooling the pump, I just use a one gallon pitcher jammed full of ice topped off with a little bit of water. Drop the pump to the very bottom and let 'er rip. That's more than enough cooling for top offs and I've even filled my little Guppy tank up from 3000 to 4500psi using just one pitcher load of ice. Just be damned sure that your drain hose (water return) doesn't sneak out of the container and drain all of your water on the floor while your back is turned= burned up pump.

Cheers,

Glenn in Texas

For just over a month, I used my Yong Heng compressor to fill and top of 3 different guns..
1 has a 250ci tank, 1 has a 280ci tank, and the other is smaller.. I did this several times per day - Every day. I shoot a lot.
Topping off even the largest tank [the 280cc] from 120 bar back to 200 bar was probably still less than 1 minute..
The air-flow Is Regulated, so, you don't have to worry about fast/over filling. It is nice and gradual.

Now - Putting my Y.H. comp to the real test.. [And it worked absolutely flawlessly]

I finally got my new 88 cubic inch carbon fiber tanks all assembled, and needed to completely fill it from scratch..

From 0psi to 4,700psi took a total of 80 minutes of combined run time.
Obviously, taking cool down and drying breaks in between run times..

My setup wasn't special at all.. Royal Purple 100 compressor lube, 5 gal bucket 3/4 filled with cold tap water, 
and then I have two 2ltr soda bottles that are frozen, which are dropped into the bucket to add more cooling..
The moisture/oil filtration was done only using the small OEM trap that comes with the unit..

[I'm still waiting for pieces and parts to do a hybrid oil/water separator] 

Sam -

PS: Here are the numbers I came up with as for compressor Start/Stop times, Temps, and Pressures:

Sam,

That is great data, thanks for sharing. I am thinking of filling a scba tank from 0-4500 psi with the YH compressor and this gives me confidence to try it as well. How saturated with water/oil was the filter in the OEM moisture trap? Compressor is in my “man cave” and I keep humidity controlled to 40% and I can bring it doen a little lower to help with moisture.



CJ