Cheap blast cabinet worth it?

[MCKDAVID]

...... I will convert ours to run on the blast pot at some point... when, I'm not sure...

sadly I can appreciate that point..... things usually get done here when the client insists on something, then I'll get to it, if not, it sadly stays on the list.... shame as all the parts are sitting underneath it gathering dust...must try harder.

 

[Ross365]

With the cheap small cabinets, what pressure are people operating the guns at? With a syphon system, there's a point where too much pressure in to the gun counteracts the syphon effect. Someone told me to stay at no more than 90psi, and I do and I think that seems to work. So I have the regulator on the compressor set the max the tank will hold, then a second regulator just before the gun set at 90psi. I usually use the size 4 nozzle.

 

[RWD3M]

With the cheap small cabinets, what pressure are people operating the guns at? With a syphon system, there's a point where too much pressure in to the gun counteracts the syphon effect. Someone told me to stay at no more than 90psi, and I do and I think that seems to work. So I have the regulator on the compressor set the max the tank will hold, then a second regulator just before the gun set at 90psi. I usually use the size 4 nozzle.

I have 100 set on the regulator but this drops as soon as the gun is operated to around 80 - 90 psi.

 

[MCKDAVID]

I run mine somewhere around 5-6 Bar (guage isn't that accurate, but around that so wee bit less than yourself.

 

[bricol]

With the cheap small cabinets, what pressure are people operating the guns at? With a syphon system, there's a point where too much pressure in to the gun counteracts the syphon effect. Someone told me to stay at no more than 90psi, and I do and I think that seems to work. So I have the regulator on the compressor set the max the tank will hold, then a second regulator just before the gun set at 90psi. I usually use the size 4 nozzle

Not heard that before - mine runs at full un-regulated pressure, so well over 100psi - somewhere around 115psi. If I'm doing more delicate parts, I'll throttle it down. Nozzle isn't massive - 2-3mm dia.

 

[brightspark]

Not heard that before - mine runs at full un-regulated pressure, so well over 100psi - somewhere around 115psi. If I'm doing more delicate parts, I'll throttle it down. Nozzle isn't massive - 2-3mm dia.

just run all my stuff over 110 psi apart from spray guns got a lot of spare capacity so it never drops .any delicate stuff gets done with the suction gun beads and sand .anything big gets grit open blasting

 

[bricol]

just run all my stuff over 110 psi apart from spray guns got a lot of spare capacity so it never drops .any delicate stuff gets done with the suction gun beads and sand .anything big gets grit open blasting

I can add a 3hp piston compressor, as well as a little 1.5hp thingie if the hydrovane starts to not keep up . . . luckily the other half doesn't pull me up when I complain about 5W LED lights being left on with no-one in the room, and compare it with all that coming on-line . . .

 

[MetalMonkey]

With the cheap small cabinets, what pressure are people operating the guns at? With a syphon system, there's a point where too much pressure in to the gun counteracts the syphon effect. Someone told me to stay at no more than 90psi, and I do and I think that seems to work. So I have the regulator on the compressor set the max the tank will hold, then a second regulator just before the gun set at 90psi. I usually use the size 4 nozzle.

When I had a syphon setup I ran it around 80-90psi, I'd get a few minutes blasting before it would clog up and I'd be routinely sieving the media, especially if it had sat for any period of time.
On my current metering valve setup, I can run it down as low as 30-40psi and still have effective (but gentle) cleaning, or crank it up to 90psi for serious rust removal. Never clogs up, and the media is just re-used, not touched it in years.

 

[Edward Teach]

Does it not work that you have a short length of suction hose, for sucking the media from the bottom, inside the cab,
This was how I used my suction blast cab, last time I used it, from what I can remember, it was several years ago.

 

[Ross365]

I think there are two distinctly different types of syphon.
Type A; I've only seen these on Youtube, but basically it seems to be a horizontal tube position in a Vee-shaped bottom of the cabinet
Type B; (my type) it's a large hexgaonal shaped "bolt-head" affair, with holes of about 3-4mm diameter in each face of the hex, and the hex has a drilled out core ( which is vertical) connected to the gun, so the media gets sucked in through the 6 holes and up out of the top in the plastic tube.

When mine was new, before I started using it, I spent some time with a grinding stone rounding off the intake edge on the 6 holes to give it a smoother profile and perhaps make it easier for media to flow in to it. It was stainless, so not easy to work. I've not had any problems with clogging. I'm using recycled glass media, carefully sieved.

 

[zeppelin builder]

a good mod is one of those round greenhouse heater tubes fitted though the hopper and left on it keeps the beads dry it cures the problem with the siphon choking up