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Set Square
 
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In an earlier contribution to this discussion,
Andy Hall wrote:

On Sat, 8 Jan 2005 12:22:12 -0000, "Set Square"
wrote:

Air separators - such as Screwfix 90641 have been mentioned from
time to time.

They seem to consist of two concentric cylinders, with four
connections - one each end and two off the side, near the ends.

Can anyone enlighten me as to:
* How they work (what's inside?)
* Where to put them in the circuit?
* How to connect them - what are the 4 tappings for?

TIA.



I'm not sure about that specific one, but the principle is that you
bring the feed/expansion pipe, the vent and an in/out connection to
the circuit together, with the vent at the top.

The water in the circuit passes through the chamber and air bubbles
rise out from it. Some of them have a baffle or equivalent
arrangement inside to provide a longer path (more time) in the
chamber.

http://www.bes.ltd.uk/products/106.asp (look at Aerjec)

Apart from separating air out, because the vent and feed pipes join at
a common location, there should be no pump over or suck down either.



Thanks for that. Presumably they can only be used in vented - and not
sealed - systems?
--
Cheers,
Set Square
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