New processor.

[Oilybloke]

Regarding the venturi: my existing one is at right angles to the main flow (so only air or meth-oxide ever flows through it) and this seems to make more sense to me, inasmuch as it does not restrict any flow of oil into the tank. Am I right?

There is a vent from the glyc collection vessel, how necessary is this?

All comments appreciated,
Nick.

A well matched venturi has very little effect on pump flow, no more than 2 - 5%. As the venturi is only used to inject the methanol and demeth when an eductor is employed why worry about the flow.

Venting the Glyc vessel is down to the users discretion, do you WBD, how well vented is the work area? to be safe a vent is advisable, seal the whole thing.

Thank you Jim, I understand. So, should I branch the feed pipe to the top of the tank so that one fills (via the venturi), and one pumps to the eductor? I have a ginormous work area, plenty of ventilation, so reasonably happy with glyc venting, but might try to incorporate it.

[Oilybloke]

Just bumping this thread really.......is it better to have two pipes running from the pump to the tank i.e. one feed via the venturi to the eductor, and one straight through to just fill the tank?

Cheers guys!

[julianf]

Im not sure if this is what you are asking, but -

For filling the reactor with veg, i doubt that flow is that important?  If it takes 1,3,5 mins longer or shorter, is that worth thinking too much about?

If you are talking about filling through the venturi, as in through the sucking port - i know people do, but id much rather use a pump to pump or suck the feedstock in.  Besides, i find the venturi gets blocked if im not carefull.

As i say, im not sure if that is relevant to what you are asking or not!

[Tony]

I guess the concern is blocking a small orifice with BCBs in the oil.  Depends on your setup really and how you fill the tank.  Personally I wouldn't want to have to load the tank up with cold oil via the venturi.

[Head Womble]

There's no need to have a dedicated pipe just for filling, yes the venturi will slow down the flow of cold oil,
but all you have to do is run the oil through both the venturi and the eductor and it's fine.

[Jamesrl]

A lot of fuss over nothing, just run the oil through the venturi, you'll need a fair sized bit of crap to block it.

Anything large enough to block even the smallest venturi throat will have to get past the pump impeller first, think about it.

[julianf]

A lot of fuss over nothing, just run the oil through the venturi, you'll need a fair sized bit of crap to block it.

Anything large enough to block even the smallest venturi throat will have to get past the pump impeller first, think about it.

Not if its the side ports that are blocking.

...and theyre much more of a pain to get clear : (