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Cleaning airless spray gun tips

BlastOne’s Master Technician, Kerry Cooper, shows how to clean airless spray gun tips


Now, what’s one thing I need to do before I finish for the day? This little sucker here, this tip needs to have a rinse because I’ve reached it with the solvent in the brush.

Well, what can happen is the remnants can remain within the barrel itself. So, the back of the barrel which is quite large can have remnants of dry material in there. So, what I need to do is replace this safety on, replace this tip housing, and with the tip in the spray mode. Remember, that’s reverse. That’s the spray mode. Safety off. I will put that over the tin. Wrap the piece of rag around there. Pull the trigger. What I’ve just done is this – give us a quick squirt.

Now, I’m going to do it backwards. Again, keep yourself safe. Pull the trigger. It looks like that. See, there’s not a lot of pressure but it’s enough to know that I’ve rinsed it. Safety on and do this.

So, you see, I have done all product transfer without the tip on. The tip does not stay on there. Now, again, I’ve screwed that on there. So, what I need to do is give that a rinse like so. Safety on.

Now, before I pressurize this system, again, I’ll just put this. Give this a rinse again. Make sure it’s nice and clean.

So, avid young spray painters, what I’ll do is I’ll take that tip out of there. Now, this going to clean tin with some solvent.

The best thing to use is a glass jar because I can see, if they’re solving remnants left in there. Always super-duper, duper, duper clean. Always clean. But keep this clean, I stay safe.

Remember the halfmoon washer that I put on earlier? Well, look, now, it’s had a bit of pressure in it. It’s remained within the barrel. Can I leave it there? Absolutely.

It’s when you do this too much – turn back and forth, back and forth, back and forth with the pressure on there that you actually scour that halfmoon washer. To be honest, it could last two or three tips before you replace it.

In the tip pack in itself, when you restore the other tip, you’ll see that that halfmoon washer is in there. What I suggest you do is keep them as a married set. That tip goes with that halfmoon washer. This tip goes with that halfmoon washer.

Why? Because it keeps me safe. Why? Because that has to seal on the back of that halfmoon washer. And if you put that in there, and then halfmoon washer on a new tip, and there’s existing halfmoon wash is still there. When I pull the trigger, the paint can come out of here or here, which is the edge of the barrel, or worse it can come out the back.

So, remember what I said, new tip – married set. Halfmoon washer, back end washer – new tip. They stay as a set, married set. Always change them. That’s why it’s been appropriated like that so that you can do that.

So, I’ll put the filter back. I’ve given this a rinse, bit of a tidy up. I’m going to put that in a nice clean tin of solvent.

I’ve removed the majority of the tinter from the equipment. So, therefore when I put it in solvent, it shouldn’t taint the solvent too much in the sense that it makes it discolored, but I can’t see what’s in there.

How long do these tips last? The manufacturer says about 800 liters. To be quite honest, whether you can get anything up to 1500 liters out of them. What you need to do is what I showed you earlier is to look at the spray pattern before you start. If you worried about the tip, give it a squirt on the wall and see what sort of a pattern I’ve got. If it’s nice and oval, be it horizontal or vertical. If it’s nice and oval, the tip is still in good repair – way to go.

If it’s not oval and it becomes like a barrel shape and it’s going to define line in the middle of it, that means, that there’s significant wear in the tip and you need to change it.

Depends also too on the other product it is spraying. If you’re spraying like the _____ iron oxides, aluminum fueled products, they’ll tend to be a little bit more detrimental on the tip life, which significantly reduces the tip life itself. You’ll need to change them periodically.

So, if it’s not the right tip for the job or the tips worn, it’s a false economy. If you continue to use it. Ultimately, you’re trying to get an achieved dry film thickness in accordance to spec or manufacturer’s recommendations.

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