Yong Heng heating up too fast

I just got my YH yesterday & have filled a 30 minute & 60 minute SCBA tank to 4200psi. Works like a charm BUT I have an aquarium pump that has better gpm (gallons per minute) output than the pump that came with the YH and I have a full size floor fan on HI speed blowing on the compressor also. I do add 4 frozen bottles of water to chill the water in my 5 gal bucket & when I'm done just put them back in the freezer for next time. Going to add antifreeze & water wetter in the next couple days too. All advice I've gotten says to do everything we can to keep it running cool as possible. 

upgrade the pump higher GPM and keep the hoses as short as possible, add ice to the water and cooling additive, and have a fan blowing on the compressor, 

You might want to check for leaks. I got my $298.00 dollar Yong Heng a few days ago, and I also purchased that big gold coalescing filter as well. When I turn on the compressor it takes no longer than 4 minutes to pressurize the coalescing filter up to 150 bar. Might be closer to 3 minutes actually. The first time I used the compressor, once my bottle got to approx 200 bar, it really did not move pass that point. As it turned out, I had a small leak in one of my fittings. Also, I use a 5 gallon Lowes bucket, half full of water, then I put a gallon milk bottle with frozen water inside the bucket, along with some ice from the fridge icemaker. I ran the compressor for 20 minutes today, it never got above 52C. I also went to HomeDepot and got the Ridgid water pump (its located in the tile section of home depot), it was 27 bucks, and pushes 50 gallons per hour.

edited - i actually got the RIDGID #AC11306 pump (not the Ryobi). It is rated for 50gpm and is twice the size of the Yong Heng pump, and it has a grounded plug, safer. Also, there is no chance of the plastic tube fitting coming loose or falling off while in use.

Go to ace hardware and get connectors to attach your garden hose up directly to the unit. Way higher flow will keep it cooler. Might want to divert that water to your grass or garden. 

50C is not a problem 75C is. I found that newer compressors, piston or ring sets produce higher heat for a time before they settle down. It took my new 2nd stage piston and ring set about twenty to thirty minutes to settle down to a lower operating temperature.

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You might want to check for leaks. I got my $298.00 dollar Yong Heng a few days ago, and I also purchased that big gold coalescing filter as well. When I turn on the compressor it takes no longer than 4 minutes to pressurize the coalescing filter up to 150 bar. Might be closer to 3 minutes actually. The first time I used the compressor, once my bottle got to approx 200 bar, it really did not move pass that point. As it turned out, I had a small leak in one of my fittings. Also, I use a 5 gallon Lowes bucket, half full of water, then I put a gallon milk bottle with frozen water inside the bucket, along with some ice from the fridge icemaker. I ran the compressor for 20 minutes today, it never got above 52C. I also went to HomeDepot and got the Ryobi water pump (its located in the tile section of home depot), it was 27 bucks, and pushes 50 gallons per hour.

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I actually had a leak on one of the fittings which I fixed, but it’s still pretty slow. For me, the compressor will pressurize the line to 2000 psi in about a minute, but around there it’s at about 55C. I was actually thinking about a bigger water pump. Does it make a huge difference? If so I’ll have to go get one.

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It can't hurt but I do not believe it is needed. I've used the pump that came with the YH for a long time. Ice added to the water and a good high volume air flow across the cylinders do more for cooling, IMO. I do have my return line above water reservoir surface so I can see with a glance that it is flowing. With the above conditions mine never got above upper 40's.

Going to add antifreeze & water wetter in the next couple days too. All advice I've gotten says to do everything we can to keep it running cool as possible.

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Antifreeze is NOT a good heat conductor. It will actually reduce the cooling effect. Its job is to prevent corrosion Water Wetter does help. It is a water softening additive and may also prevent corrosion.

I blow the lines free of water each time I use the pump and use highly filtered water in the bucket.

Springrrrr, thanks, I'll go with the Water Wetter for now. I filled a 30 minute SCBA & bumped up a 60 minute one too. Temp was more consistent & cooler on the 2nd fill which is encouraging. Hope that additive makes it even more so.