Cyclone owners, a question

nothungry3 · Post by **nothungry3** » Fri Sep 26, 2014 11:44 am

Again, thanks.
I have some spray rubber that I've been itching to try as a sealant.
I'll have to think about creating a large vacuum vessel. There could be some surprises there.

moggymatt · Post by **moggymatt** » Fri Sep 26, 2014 11:45 am

The sideways test of the cyclone was curiously interesting. Thanks for the thread.

As a related question, has anyone here made a home made version?

JPG · Post by **JPG** » Fri Sep 26, 2014 12:45 pm

I think the total height of the dust deputy vortex/cone/outlet precludes mounting vertically in a MVII base even without a catch vessel below. I will double check that later and change that statement if it is erroneous.

That be the reason for the horizontal operation question. I think there is sufficient length available in the MVII lower cabinet, but including a 5 G bucket is questionable(maybe vortex horizontal with the bucket vertical with a elbow between). Later double checking will verify/negate that.

Since I use the Dust Deputy as a portable 'early collector' everywhere, I am planning on making the lower cabinet for attachments/etc. storage.

nothungry3 · Post by **nothungry3** » Fri Sep 26, 2014 8:33 pm

GG,
My thought is replacing the 5g bucket with a 20g bucket, the Mark 7 dust box. The problem then becomes ease of cleaning out the chips.
You have a cyclone and I don't, let me know what you think.

JPG · Post by **JPG** » Fri Sep 26, 2014 8:56 pm

nothungry3 wrote:GG,
My thought is replacing the 5g bucket with a 20g bucket, the Mark 7 dust box. The problem then becomes ease of cleaning out the chips.
You have a cyclone and I don't, let me know what you think.

The 'bucket' regardless of size/shape MUST BE AIR TIGHT!!!!! It operates in a vacuum. That makes what you are considering a bit difficult.

The MVII originally used a bag in that box, but it was on the pressure side of the vac blower.

nothungry3 · Post by **nothungry3** » Fri Sep 26, 2014 9:39 pm

GG,
I can't see any difference between being on the pressure side of the ss vac, and being on the suction side of a shop vac. I am not assuming the ss system will drive a cyclone, a boost will be needed or dimensions of the cyclone will need to be adjusted to maintain velocity.

JPG · Post by **JPG** » Fri Sep 26, 2014 9:47 pm

nothungry3 wrote:GG,
I can't see any difference between being on the pressure side of the ss vac, and being on the suction side of a shop vac. I am not assuming the ss system will drive a cyclone, a boost will be needed or dimensions of the cyclone will need to be adjusted to maintain velocity.

Pressure side 'leaks' merely distributes dirty air.

Vacuum side leaks makes the cyclone less effective(air flow from collection box into the bottom of the cyclone.

What you use as a vacuum source is not pertinent. The cyclone requires a collection vessel with NO air flow in/out of it.

nothungry3 · Post by **nothungry3** » Fri Sep 26, 2014 10:11 pm

GG.
I agree With you, BUT:
if your reference pressure is ambient, you could be on the pressure side of the pump and still be in vacuum (minor quibble)

if you believe that your plastic bucket is maintaining a perfect vacuum you should do a pressure test. If i can seal the dust box as well as your bucket (in the deformed state), I can create the same pressure conditions.
Again, you have a cyclone and I don't , I want your thoughts on the feasibility of this idea before I waste a bunch of time.

BuckeyeDennis · Post by **BuckeyeDennis** » Fri Sep 26, 2014 10:35 pm

nothungry3 wrote:GG,
I can't see any difference between being on the pressure side of the ss vac, and being on the suction side of a shop vac. I am not assuming the ss system will drive a cyclone, a boost will be needed or dimensions of the cyclone will need to be adjusted to maintain velocity.

Help me out here:
1. When you say "ss vac", do you mean the original one in the Mark 7?
2. And do I understand correctly that it works like an ordinary household vacuum, with some sort of impeller, through which the detrius must pass before being blown into a collection bag?
3. And that you want to place the cyclone separator downstream of the impeller?

JPG · Post by **JPG** » Fri Sep 26, 2014 10:42 pm

nothungry3 wrote:GG.
I agree With you, BUT:
if your reference pressure is ambient, you could be on the pressure side of the pump and still be in vacuum (minor quibble)

if you believe that your plastic bucket is maintaining a perfect vacuum you should do a pressure test. If i can seal the dust box as well as your bucket (in the deformed state), I can create the same pressure conditions.
Again, you have a cyclone and I don't , I want your thoughts on the feasibility of this idea before I waste a bunch of time.

1) My 'bucket' does not 'deform'. It is a salvaged shop vac drum.

2) Relative to 'ambient' pressure, the 'suction side of a vac has lower pressure(vacuum) and the pressure side has greater pressure. A 'perfect' vacuum is not likely obtained by any vacuum cleaner.

3) What matters to the cyclone is the relative pressure is the same in the 'bucket' as at the small end of the cyclone so there is no air flow in/out of the small end of the cyclone except for the air(very thin)displaced by the accumulating debris.

4) FWIW, a perfect vacuum causes ambient air pressure to only exert about 14.7 pounds/square inch.

5) I think your 'thinking' is not representative of reality. I detect some generalizations that are not as things are.

Regardless of whether the MVII cabinet will work as you envision, the dust deputy can still be used externally.

I did not get a chance to measure the MVII cabinet tonight.

I am curious how you intend to run the two hoses to the cyclone inside the cabinet from the outside.