Sandblasting nozzle using spark plugs

[diogofcr]

Ok, thank you, but are they like rubber pieces to reduce the side "inside" the ball valve before the nozzle?

 

[Burdekin]

http://www.blastitclean.co.uk/page9.html

 

[diogofcr]

http://www.blastitclean.co.uk/page9.html

Thank you, but this is a website to buy nozzles right? Bright spark had already linked me to one :P What I was asking is if there is any rubber piece that will fit inside my 1/2" ball valve so the gun doesn't jam when it get to the car spark plug because it liks a 15mm hole to 3mm and the abrasive just jams in there and stops airflow

 

[MBB]

I used to make them with cast iron window sash weights. Turn to the size you want drill hole you need down centre heat to cherry red then put compressed air down hole till cold enough to handle, don't water quench. These are harder than carbide and last longer. I had to do this when I forgot to order nozzles for a large industrial walk in shotblast unit. I only made them as a temporary fix till the carbide ones arrived but the cast ones lasted at least four times longer than the carbide ones.

MBB

 

[rtbcomp]

Thank you, but this is a website to buy nozzles right? Bright spark had already linked me to one :P What I was asking is if there is any rubber piece that will fit inside my 1/2" ball valve so the gun doesn't jam when it get to the car spark plug because it liks a 15mm hole to 3mm and the abrasive just jams in there and stops airflow

If you're using the ball valve at the nozzle to regulate the flow of media you haven't got the pot set up OK, it should be either on or off.

Turn all your valves off
Open the nozzle valve fully (if fitted)
Open the top air valve fully
Open the valve at the side fully
Slowly open open the bottom valve until you can just see the media stream coming out of the nozzle

If you want to reduce the overall air/media flow adjust the top valve (or the regulator if you have one fitted), and adjust the bottom valve if necessary.

It can take up to 15 seconds for the adjustments to take effect, so be patient and adjust the valves a little at a time.

 

[Shox Dr]

I found male PCL barbed fittings work a treat.

 

[diogofcr]

If you're using the ball valve at the nozzle to regulate the flow of media you haven't got the pot set up OK, it should be either on or off.

Turn all your valves off
Open the nozzle valve fully (if fitted)
Open the top air valve fully
Open the valve at the side fully
Slowly open open the bottom valve until you can just see the media stream coming out of the nozzle

If you want to reduce the overall air/media flow adjust the top valve (or the regulator if you have one fitted), and adjust the bottom valve if necessary.

It can take up to 15 seconds for the adjustments to take effect, so be patient and adjust the valves a little at a time.

I am not using the ball valve at the nozzle to regulate the media like you said I am using it to be on or off. But that ball valve is 1/2" and the ID is more than 10mm when I fit the car spark plug (as nozzle) the hole is like 3mm and the media gets jammed. I can send photos if you want because i am not able to explain it, I needed like a rubber piece to reduce the diameter so it didn't jam

 

[diogofcr]

I used to make them with cast iron window sash weights. Turn to the size you want drill hole you need down centre heat to cherry red then put compressed air down hole till cold enough to handle, don't water quench. These are harder than carbide and last longer. I had to do this when I forgot to order nozzles for a large industrial walk in shotblast unit. I only made them as a temporary fix till the carbide ones arrived but the cast ones lasted at least four times longer than the carbide ones.

MBB

I am not looking for nozzles :P (but thank you for the tip) I am looking for something to reduce the diameter inside the ball valve to fit my 3mm nozzle like a rubber piece

 

[rtbcomp]

I suppose you could use a 1/2bsp to 10mm (microbore) reducer, or maybe some washing machine hose, but the best bet is to remove the nozzle valve altogether, they don't last long.

when I fit the car spark plug (as nozzle) the hole is like 3mm do you mean the hole down the centre of the nozzle? If it's blocking it'll block no matter how you fix the nozzle into the valve.

 

[brightspark]

cut the ball valve off the end of blast hose and fit jet in using a jubilee clip and operate the pot from ball valve next top water separator on inlet to pot

 

[diogofcr]

Here are some pics, I tried fitting a piece of 3/8" rubber hose inside and maybe it will work, I am not sure though, it my just wear it out and still accumulate abrasive inside and jam. What do you guys think?

 

[brightspark]

look at post 30. as I said and if it blocks up your putting to much abrasive through the hose

 

[diogofcr]

Ok, thank you. If I need more help I will say

 

[KemppiFrog]

From what I see, what the guys are telling you is that having a stop valve at the sharp end of the rig is not a good idea. Regulat the medium at the bottom of the pot and the air on the side of the pot. Cutting it on and off at the ball valve you have will leave medium in the tube, which then will rush up and clog the reduction at the nozzle.
rtbcompt's post was the best answer. Think he has a 'bit' of experience on the subject....

Edit: Ah, missed the last couple of posts.

 

[brightspark]

here's both of mine I've been using them for 40 years no problem

 

[diogofcr]

here's both of mine I've been using them for 40 years no problem

Ok so I would control it from like the quick connector valve/near the pressure regulator/water trap valve (in your case it is not a quick connector), right?

 

[brightspark]

Ok so I would control it from like the quick connector valve/near the pressure regulator/water trap valve (in your case it is not a quick connector), right?

yes I use c couplings on both mine with large bore hose but if your using a 3mm jet a 10mm bore pipe will be fine using slightly larger bore connectors than the standard pcl couplings

 

[diogofcr]

yes I use c couplings on both mine with large bore hose but if your using a 3mm jet a 10mm bore pipe will be fine using slightly larger bore connectors than the standard pcl couplings

Thank you

 

[zeppelin builder]

you need loads of cfm even for a 6mm nozzle

 

[brightspark]

you need loads of cfm even for a 6mm nozzle

namely 90cfm I use one