Honeywell zone valves leak glycol?
Allan Anderson
(antifreeze) boiler system.
The zone values are slowly leaking glycol and my supplier says they just
don't work well with glycol--that
these values just leak a bit with glycol (not with water, no problems
there). They worked OK
with water but started seeping when I added the glycol mix. They weren't
overheated when sweated in.
I'm about the pull the value apart and use some pipe joint compound
between or auto gasket
compound. I don't see why a gasket won't hold glycol.
Has anyone had this problem with glycol before?
So, there's a run outside, in the ground, to a garage for some
baseboard, requiring the glycol.
Otherwise, it would be water, of course.
Allan Anderson
HVACMAN
where water didn't. Also make sure you use glycol intended for HVAC... it is
more expensive for a reason... additives to prevent corrosion (and leaks!).
Allan Anderson
> The glycol makes the mix more viscous than straight water... it will
> leak
> where water didn't. Also make sure you use glycol intended for HVAC...
> it is
> more expensive for a reason... additives to prevent corrosion (and
> leaks!).
>
"Polar Guard" glycol (for heat transfer use).
--
Allan Anderson resp...@nospam.visi.com
Allan Anderson
> why are you using glycol in the system.
>
> Bill
> Allan Anderson wrote:
>
> > I have some Honeywell V8043 3/4" zone values in a 50% propylene
> glycol
> > (antifreeze) boiler system.
> > The zone values are slowly leaking glycol and my supplier says they
> just
> > don't work well with glycol--that
> > these values just leak a bit with glycol (not with water, no
> problems
> > there). They worked OK
> > with water but started seeping when I added the glycol mix. They
> weren't
> > overheated when sweated in.
> >
> > I'm about the pull the value apart and use some pipe joint compound
> > between or auto gasket
> > compound. I don't see why a gasket won't hold glycol.
> >
> > Has anyone had this problem with glycol before?
> >
> > So, there's a run outside, in the ground, to a garage for some
> > baseboard, requiring the glycol.
> > Otherwise, it would be water, of course.
> >
> > Allan Anderson
Because water outside freezes here in winter...
Allan Anderson resp...@nospam.visi.com
Bill "hvac" Spencer
a couple of valves. Straight glycol is not the best to put in a system, it
slimes the pipes. You could drop the pipes outside below the frost line.
Bill
Ted Morgen
Glycol is a problem. If there is a way out of the piping, glycol will find
it. Your
50% ratio sounds a little thick! Hope your pumps can move it through the
building.
Most places use either 30 or 40%, unless your climate is very cold and
exposure to
coils/piping is a serious problem. I would look at thinning the mixture
down if you
can. I live/work in the Denver area and we use 30%. The temperature
rarely gets
that severe here, although it has happened.....-35F in January, 1982. Most
of the
time, the solution might turn to slush, but will not freeze enough to cause
damage.
Good luck.....and you might try a Barber Coleman - Seibe valve. They are
little more
stout.
Ted
Allan Anderson <resp...@nospam.visi.com> wrote in article
<363258C8...@nospam.visi.com>...
Hopkins
Allan Anderson wrote:
> Has anyone had this problem with glycol before?
>
Allan, When I worked up north we had numerous hydronic systems with
antifreeze in them, not too sure of the type we used to get it in 55 gallon
drums from the supply house and follow the directions for the mix usually
30/70
with 70 being water. We had problems with leakage as well, boiler drains,
valve packing glands, relief valves, etc. Some systems worse than others,
but I did notice that the higher the temp. the worse the leaks. The Taco
zone valves seemed to hold up the best including their circulators. I used
to hate going on calls where there was
a leak , that stuff looks bad when it leaks out and dries, like snot or
something!
We did start using some pink colored stuff I believe it was made by Camco
and rated for R.V. use. It did not leak at all in the short time I used it
(11 months).
Maybe it was a different mix. We used the stuff primarily for recurrent
power
outages in our rural area.
Well enough of my two cents, enjoy, M. Hopkins
DAWightman
The additive can react with the rubber, or can be slick enough to seep by the
rubber seat...
D. A. Wightman
President, Leading Edge Industries, Inc.
http://www.leadingedgeind.com
Refrigerated Cases, Equipment, and design.
1(888)LEI-9996