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On Sat, 6 Nov 2004 10:01:22 -0600
"Russell Duffy" <13brv3@bellsouth.net> wrote:
I'm considering the Meziere WP337, or two WP116's. I have my
evaporator cores set up for AN16 fittings. I haven't quite figured
out whether I can get any of the Meziere pumps to use AN16 for inlet
and outlet directly, or whether I will have to make external adaptors.
Bob White
Hi Bob, The Meziere pumps you mentioned both use interchangeable fittings, and
you can absolutely use AN-16 directly to the pump. I consider that a
huge benefit vs having to make your own fittings like we do for the
Davies Craig.
Since some of the Meziere pumps have dual outlets, and some have
single, the options are numerous. The easiest thing to do would be to
use their adapter plate, and one of the pumps with a dual outlet. If
you want redundancy, you could add a second pump like the WP336 inline
with the inlet side of the dual outlet pump. I still think the
neatest trick would be to have one pump for each evap core, but that
requires a one way valve of some type, and I haven't come up with a
good one yet. If you haven't found the Meziere site yet, here's a link to their
catalog- http://www.meziere.com/index.php?pgName=catalog
I can't seem to download the 2004 catalog, but the 2003 works. You
can also look at page 16 (remote) and page 19 (fittings) from the 2004
catalog. Those show you the pumps, and fittings. Page 14 (import)
shows the adapter plate that bolts to the engine. HEY, look at that! They now sell an adapter (WP91) that has only one inlet, and one
outlet, rather than two and one like the WP90 they've always had. This is the first I've seen this. Cool!!! Cheers,
Rusty (now thinking about dual EWP's again)
Thanks Rusty,
It wasn't clear (to me) from the description that I could get the AN16's
with the correct dia fittings for both input and output. The WP116 I
referenced above should have been WP136. Two 20 GPM or one 55 GPM. I
doubt the 55 GP will be achievable through the AN16 fittings.
The WP91 is super if I decide to go with a single pump. I was going to
make my own and my stuff never looks too good.
I have attached a picture of some check valves I found on the internet. It seems like these shouldn't create too much back pressure. If I
decide on two pumps, I might try this type of check valve.
My two pump option would be to run them in parallel, one off of each
evap core. I would think that if I had a pump fail, I could reduce
power to minimum required to maintain flight without overheating. Maybe
I need a flow sensor to know that I hava a problem before overheating
occurs. Actually, it would be kind of interesting to see if one of them
could be turned off for cruise.
I though I had seen a 7 Amp rating on one of the Maziere pumps, but when
I went to look for it again, I couldn't find it. Bob White
--
http://www.bob-white.com
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