atconut
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The job so far. thanks for the advice guys i never thougth of doing it that way but it makes a lot of sence
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The job so far. thanks for the advice guys i never thougth of doing it that way but it makes a lot of sence
atconut
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atconut
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USED SOME TAILGATE RUBBER SEAL
found an old steel shelf cut out the opening for the glass and it's looking good. not easy to see but the glass is in the frame. it just needs a strip of foam between the frame and the glass and a peice of plastic between the glass and the rubber then a couple of captive bolts and wing nuts. i may put a piano hinge accross the top edge
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atconut
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put some piano hinge accross top edge and two captive bolts at the bottom. nearly done. just the pot to go underneath an a lick of hammerite
brightspark
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what are u doing about dust extraction??
brightspark
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:QUOTE=atconut;208118]i've got a big dust extractor it's like a big hoover but it's a propper dust extractor[/QUOTE]
gr8
gr8
atconut
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gr8[/QUOTE]
it's hard to see so heres a pic with the frame propped up there is a sheet of plastic under the glass
atconut
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gr8
it's hard to see so heres a pic with the frame propped up there is a sheet of plastic under the glass[/QUOTE]
next job is to mount a pressure pot underneath with a big ball valve in the bottom of the cabinet to let the grit return to the pot but i was thinking about some safetey device to prevent opening the ball valve while there was pressure in the pot that would be messy
it's hard to see so heres a pic with the frame propped up there is a sheet of plastic under the glass
next job is to mount a pressure pot underneath with a big ball valve in the bottom of the cabinet to let the grit return to the pot but i was thinking about some safetey device to prevent opening the ball valve while there was pressure in the pot that would be messy
Could use a pneumatic valve to release the pressure when you're not stood on the operating pedal. Like this one
http://cgi.ebay.co.uk/ERF-EC-ECX-SP...CommercialVehicleParts_SM?hash=item3a599b37f3
I've used a similar system for the dead man handle on my blast pot.
rtbcomp
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That could waste a lot of air.
I've fixed a ball valve on my pot so that the handle obstructs the filler on the pot when closed. You have to open the valve before you can take the top off. Maybe you can do something similar.
atconut
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yes i need to come up with something maybe not to release pressure but just stop ball valve being opened. thought about making a popup valve but i've no laithe and it's got to be right. 100psi is not to be messed with. by the way i was wondering would a gate valve be better for metering the grit at the bottom of the pot rather than a ball valve?
atconut
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that's a thought good idea
rtbcomp
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I was wondering about that, the setting on the ball valve is very sensitive.
rtbcomp
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The way I use my pot is
1) close all valves
2) open inlet valve fully until pressure has built up
3) open bypass valve fully
4) open bottom valve slowly to get right mixture
So far so good, a gate valve would work.
Closing down:-
5) close bottom valve
6) close bypass valve when blast hose is purged of grit
7) close bypass valve
Then if I'm not going to use it for a while
8) close main valve
9) decompress tank
Now a gate valve might trap grit as you close it, a ball valve has a self cleaning action.
If the bottom valve blocks I crack it open and then close it quicky, awkward with a gate valve.
I think I may try a longer handle on the ball valve, and maybe a friction device to stop it moving by itself.
1) close all valves
2) open inlet valve fully until pressure has built up
3) open bypass valve fully
4) open bottom valve slowly to get right mixture
So far so good, a gate valve would work.
Closing down:-
5) close bottom valve
6) close bypass valve when blast hose is purged of grit
7) close bypass valve
Then if I'm not going to use it for a while
8) close main valve
9) decompress tank
Now a gate valve might trap grit as you close it, a ball valve has a self cleaning action.
If the bottom valve blocks I crack it open and then close it quicky, awkward with a gate valve.
I think I may try a longer handle on the ball valve, and maybe a friction device to stop it moving by itself.
brightspark
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as rtb says use a ball valve it can be regulated a lot faster than a gate valve especialy if it blocks . thats all i use. my 1st pot i made the metering valve copied of the clemco minipot. quite time consuming and no more acurate at metering the grit than the ball valve keep it simple
keep it simple
atconut
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as rtb says use a ball valve it can be regulated a lot faster than a gate valve especialy if it blocks . thats all i use. my 1st pot i made the metering valve copied of the clemco minipot. quite time consuming and no more acurate at metering the grit than the ball valve
i'm struggling to get a big pot under the cabinet does anyone know how long it take to use the grit in a ten gallon tank just a rough idea. the one i'm thinking of using is about three gallon. i don't want to use it if it will only last a couple of minutes
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