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View Full Version : poly glycol low temp systems auto air vents.







TONY LONGTHORNE
27-08-2013, 05:29 AM
can anyone inform me if they have experence in automatic air vent valves for low temp glycol systems. thanks.

passandscore
27-08-2013, 01:26 PM
I have used the following products with success.
https://customer.honeywell.com/en-US/Pages/department.aspx?cat=HonECC%20Catalog&category=Air+Elimination&catpath=1.2.26.1

Brian_UK
27-08-2013, 10:47 PM
As Pass and score suggests they all work.

I would also suggest that you include a sensible length of branch pipe from the pipe being vented to allow any microbubbles to accumulate before they enter the AAV.

MikeHolm
28-08-2013, 01:26 AM
Try and use ones with stainless steel bellows and Viton seals. We have this problem in the solar industry all the time. Caleffi makes a good one as does Spirovent (I believe).

goshen
28-08-2013, 05:12 PM
Hi
we use these and they are great !
http://www.arivalves.com/products/industry/item/s-050-segev-automatic-air-valve (http://www.arivalves.com/products/industry/item/s-050-segev-automatic-air-valve)
only the plastic ones ! both on polyglycol systems and regular water systems
good luck