Sputtering water flow in vevor compressor.

Jump to latest Follow Reply
MrP

MrP

Member
Apr 29, 2020
1,771
1,117
New Lebanon, NY, USA
I’ve noticed when filling with my vevor Yong-heng-like compressor the cooling water comes out sputtering, not in a smooth flow. When the pump isn’t running, the water flows normally, but as soon as the pump turns on the water is coming out in a little spurts with mixed air.

Water still flows through so some cooling is achieved but I’m wondering if this is a sign of something about to fail or some adjustment I need to make.

Thank you in advance to any compressor gurus
 
Agree with the above. If it's "sputtering" there are air pockets getting into your cooling line. If you're using the water pump that came with compressor maybe a stronger aquarium pump? That's what I use with my YH. Never any problems. Disconnect the water line from cylinder head & just run pump to see if it continues to sputter. Then you'll know if it's JUST the pump. Hope it's just pump & not compressor. Relatively cheap fix.
 
  • Like
Reactions: MrP
Upvote 0
Gerry52 said:
Agree with the above. If it's "sputtering" there are air pockets getting into your cooling line. If you're using the water pump that came with compressor maybe a stronger aquarium pump? That's what I use with my YH. Never any problems. Disconnect the water line from cylinder head & just run pump to see if it continues to sputter. Then you'll know if it's JUST the pump. Hope it's just pump & not compressor. Relatively cheap fix.
Click to expand...
Gerry,
Yeah, it's worded funny, first impression is water pump running with compressor off, water flow normal, compressor on, water spurts mixed with air. For clarity, "pump" should refer to water pump only and "compressor" should be used to describe the on/off of same. Pretty sure first impression is correct and water pump works fine with compressor off, pressurized air introduced in water cooling system, with compressor on, isn't a good sign. WM
 
  • Like
Reactions: MrP
Upvote 0
Was thinking that maybe gasket between 1st & 2nd stage cylinders was allowing air into water cooling jacket but that doesn't make sense. Have you tightened down screws between cylinders anyway, or checked if they're tight? You never said if output pressure rises to Maximum or not. SOMETHING is not sealed SOMEWHERE (IMHO). Good luck tracking it down.
 
Last edited:
  • Like
Reactions: MrP
Upvote 0
The return line is connected to the top as it should be. The screws all seem to be very tight. It gets up to pressure quickly and functions just fine and the temperature stays reasonably low at the place where the probe is located.

I’ve just been doing short fills for now. No sign of any excess water getting in the line.

I’m afraid to open it up…
 
Upvote 0
Mr. P,
I've only seen pictures of the Vevor "Yong Heng" look-a-like so can't offer suggestions. If same thing happened with my YH, I'd dismantle and investigate, suspecting metal corrosion or cracks in the water jacket. Vevor might use different water-cooling internals so a schematic search would be my first recommendation, that is, if you can find schematics. Best of Luck, WM
 
  • Like
Reactions: DesertSilver
Upvote 0
MrP said:
Nope. I’ve got too many irons in the fire to disassemble and reassemble, and fear that if I open it up, I might just make the problem worse. Seems to be working fine other than the sputtering. No sign that I can see that there’s any water in the line
Click to expand...
I only ran mine once on my gun up to around 300 bar. Worked perfectly. My friend needed his big tank topped off and I don't think I let the pump warm up enough. He had 3k psi and his fitting worked different. His backfed as I opened his tank. I did take mine apart and I'm thinking it can only be a couple of seals. Anyway I will try again with new sealant on the pipe that screws into the top head and is used for hig psi.
How long do you run it at a time? How many fills have you done since? I appreciate your help 🙏🏻.
 
Upvote 0
Mine was brand new. It doesn't have any restrictions. I also put a large water pump on it. It has bubbles in the water, so air is definitely getting into the jacket/ sleeve/ or getting by the white Teflon seals on the high side, or where the sealing sleeve for high pressure's top where a hightemp gasket maker(red) os put on the threds that screw into the top discharge head. The 3 white Teflon seals look ok, I unscrewed the high psi sleeve, replaced red gasket. But I don't think I waited long enough to cure properly. Im going to use Teflon tape and see what happens.
 
Upvote 0
Nice to see someone working on this. I generally have been using this to keep a small pony bottle topped off to a bit under 4000 psi. I refill whenever it drops below 3000. I need to check the timer, but i think I’ve only got about five hours or so on the compressor. Generally running it at what must be at most 10 minute sessions, and I leave the water flowing for a short time as seems reasonable after the compressor is shut off. Usually just long enough to cool it down to below 40c.
 
Upvote 0
You must log in or register to reply here.
Top Bottom
Back
Home
Forums
Resources
Menu