££s per metre??
No thanks.
My set-up uses a foot valve to control the pressure feed to the blast pot, and the blast nozzle is a stripped out spark plug, so the hose delivering the blast media is open ended. The normal pressure I use is 60ish psi.
I use a low friction tube as this gets less wear from the grit, which in my case is Aluminium Oxide, a fairly abrasive medium.
I use standard cheap plastic (PVC?) hose, clear with open weave reinforcing embedded in it.
Just found the 2005 invoice,
5 metres of 3/8" hose £6.00 +VAT.
The foot pedal was PED 502B from the Flowtech catalogue at £45.30 +VAT.
I also bought hose tail fittings for the valve, about £1.50 +VAT per port if using worm drive clips as well.
Two 'tricks'.
1/ Use sufficient length to get mainly gentle curves in your hose run.
2/ Note the high wear points, which in my installation is where the grit leaves the T junction at the blast pot, and the curve through the blast cabinet front wall.
Wear points are seen in the hose as the inner wears away and the reinforcing string disappears.
At these points cover the hose with 1" wide PVC tape, the normal electricians tape.
It only needs a single layer, but you lose nothing by wrapping it in a spiral with a 1/2" overlap, thus giving a bit more mechanical strength.
You will think that a single layer of tape will only last five minutes, but in fact it lasts longer than the original tube, and this PVC tape repair method can even be used on the metal T piece, which also wears through eventually.
The secret appears to be that the aluminium oxide dust sticks to the tape adhesive that is exposed as the original tube wears away. Thus the tube becomes lined with aluminium oxide at the very points that wear is the greatest. If the dust is ever worn away by the passing grit it is automatically replaced, so maintaining the strong liner.
You won't believe how well this works until you try it, but then you will be converted.
Note that my delivery hose is open ended, BUT I use the same hose between the Blast cabinet mounted pressure control / water trap and the foot valve. On this run it is subject to the full pressure, which I have had up to 90 psi, at zero flow rate. This length has no grit in it, so the PVC tape repair method is not required to withstand this pressure.
My blast pot came with some special lined hose, but I was dismayed at how quickly it wore through. I then converted to foot pedal plus 'low friction' hose, which lasted a lot longer, then developed the adhesive tape repair when that hose wore.
I think you can use the adhesive tape repair on rubber hose, with the same benefits, but your rubber hose will continue to wear faster than PVC 'low friction' hose.
Hope this is useful.
No thanks.
My set-up uses a foot valve to control the pressure feed to the blast pot, and the blast nozzle is a stripped out spark plug, so the hose delivering the blast media is open ended. The normal pressure I use is 60ish psi.
I use a low friction tube as this gets less wear from the grit, which in my case is Aluminium Oxide, a fairly abrasive medium.
I use standard cheap plastic (PVC?) hose, clear with open weave reinforcing embedded in it.
Just found the 2005 invoice,
5 metres of 3/8" hose £6.00 +VAT.
The foot pedal was PED 502B from the Flowtech catalogue at £45.30 +VAT.
I also bought hose tail fittings for the valve, about £1.50 +VAT per port if using worm drive clips as well.
Two 'tricks'.
1/ Use sufficient length to get mainly gentle curves in your hose run.
2/ Note the high wear points, which in my installation is where the grit leaves the T junction at the blast pot, and the curve through the blast cabinet front wall.
Wear points are seen in the hose as the inner wears away and the reinforcing string disappears.
At these points cover the hose with 1" wide PVC tape, the normal electricians tape.
It only needs a single layer, but you lose nothing by wrapping it in a spiral with a 1/2" overlap, thus giving a bit more mechanical strength.
You will think that a single layer of tape will only last five minutes, but in fact it lasts longer than the original tube, and this PVC tape repair method can even be used on the metal T piece, which also wears through eventually.
The secret appears to be that the aluminium oxide dust sticks to the tape adhesive that is exposed as the original tube wears away. Thus the tube becomes lined with aluminium oxide at the very points that wear is the greatest. If the dust is ever worn away by the passing grit it is automatically replaced, so maintaining the strong liner.
You won't believe how well this works until you try it, but then you will be converted.
Note that my delivery hose is open ended, BUT I use the same hose between the Blast cabinet mounted pressure control / water trap and the foot valve. On this run it is subject to the full pressure, which I have had up to 90 psi, at zero flow rate. This length has no grit in it, so the PVC tape repair method is not required to withstand this pressure.
My blast pot came with some special lined hose, but I was dismayed at how quickly it wore through. I then converted to foot pedal plus 'low friction' hose, which lasted a lot longer, then developed the adhesive tape repair when that hose wore.
I think you can use the adhesive tape repair on rubber hose, with the same benefits, but your rubber hose will continue to wear faster than PVC 'low friction' hose.
Hope this is useful.