New Member

[Manfred]

Loz, don't worry about getting things done quickly,  take your time and get it right first time.

I build extensions on that basis.

I didn't know you had extensions,  I thought it was a wig.

  Looks like Julian's getting ready for the BBB dress code winner of the year award.

[lozzzzzz]

Hi again folks,

Its been a while, I worked on the Scimitar for a while, then the reason to do so fell through, no matter, it'll be on the road sooner

And now, I've been working on the pump.  The 0.6mm wire is on its way and I'll do my best with the cone soon.

First I took it apart and freed it up.  The got it running from the 3 phase converter. 


The made it quite apparent that the bearing was history, so I took it apart further and ordered a bearing and a seal kit. 


This morning, I got that fitted and ran the motor again.  It runs really smoothly now. 



This is about as far as I got this morning but the misses is going away for a bit so there will plenty going on   I'll hopfully have the pump back together before long and start doing some practice welding with the 0.6mm wire.   I've been ordering parts from BES and the Bay, can't wait

The pump is a CEA210/4/A-V (300lpm), it cost £45, the bearing was £4.95, and the seal kit £25.  If all goes well that should be a bargain!

More to come.

[Tony]

Ah the familiar innards of pump.

I made the mistake of using really budget bearings, which lasted about 4 hours.  A slightly more expensive set are still going, however

[lozzzzzz]

Oooo, I hope I got a goodie then, I think it was second most expensive, made by FAG, I've heard of them so fingers crossed

Could you help folks, I'm pretty sure I know what I'm doing here, just an idiot check before ordering really. 

I'm fitting a chunky pump but this should have no effect on the diameter of the vent tubing right, 15mm vent is still fine right?!?!

The only thing that should effect the vent diameter is if I fit a load of heating elements correct??!!??

Thanks folks


P.S.
effect/affect, I don't really know

[greasemonkey]

I wouldn't have though it would be a problem. Your taking out the bottom, what your putting in the top.
Unless someone knows different......

[Julian]

Sounds like you have the gist of things ... the only times there's any flow in or out of the vent (under normal operation) is heating and cooling, loading and unloading including the addition of methoxide and wash water, and when you vaporise water or methanol without the condenser running.

I doubt any of those, even loading with a large pump, would warrant a larger vent, but if you are at all concerned, err on the side of caution, it can do no harm.

[Dickjotec]

I think a 15mm should be fine but it is much easier to put in a 22 at the start than wish you had fitted one and mod it later.
Keep up the good work and don't forget to get the lean to finished. Btw on the lean to I would make the roof over the processor easy to remove as the top of the processor will be close to it and you don't want to be lowering the processor if you want to modify inside it for any reason. ( I speak from experience will tell you sometime)

[Head Womble]

15mm is fine for a vent, the main thing is to use solid pipe, something that can't collapse and form a seal as if this happens the tank will implode when you pump your finished fuel out.

[Julian]

I quite like the idea of an open topped sight tube as an additional safety measure, as well as a convenient means of returning samples etc.

We just need to find a material that will stand the duty for extended periods.

For my part, Frankenpump now sucks all the liquid out of my sight tube, so I have to keep the valve closed.

[lozzzzzz]

I see your point Dick, I have tried to "go big or go home" on everything so far, it would make sense to do the same on the vent.  It would be nice to fit more than one heater at some point but that really is something for the future as I don't really have a thick enough cable to run a 3kW heater and a 2kW pump as it is.  If I do upgrade to two heaters at some point a 22m vent might be a sensible thing to have. 

On the subject of solid tubing...   really that's a long way to go with solid tubing.  What if it's decent thick walled fuel hose or something, nylon lined, would that not be ok to run the vent up to the roof???

I'm still waiting for a solution to present itself regarding the lean-to, B&Q would like about £50 for the right amount of seriously flimsy plastic sheets.  That just feels like I'm being bent over   I've still got time for this, I'll have to ask around some local farmers or something. 

I think I'll go with the sight tube too, but like you say, its finding the right material???

Frankenpump

[nigelb]

Might I suggest that braided tube for a vent line is just fine. No danger of collapse or kinkage unless it is poorly fitted and installed.

[Dickjotec]

I will have a look for sight tube, I think I have some in central stores. I certainly have some Perspex that some have used but it is brittle, will let you know.

[Julian]

Might I suggest that braided tube for a vent line is just fine. No danger of collapse or kinkage unless it is poorly fitted and installed.

Might I suggest not.  Wasn't there a case of someone storing a ladder against a braided vent pipe which in time over the summer months collapsed.

Far better to be safe than sorry.

[lozzzzzz]

Right you are then, I'll look into the options when I get that far along, but I certainly won't be using anything flimsy. 

Thanks Dick that would be great.  Do you fit a perspex tube into a olive/compression fitting??  (gently)

[willbuild]

braided is ok for sight tube but not for vent. For the gl i'm building now am thinking of using polypipe