Ernest
wrote:
>
Summit
has another filter that looks nearly identical that goes down to
35
microns, with a stainless steel mesh screen. It isn't rated for as
much
flow, but it still borders on the ridiculously high for our
application.
I'm going to install one of those after the pumps, and one
of
the PRM-81794 before. The PRM will insure the fuels clean and dry,
and
the other will catch any pieces that come loose from the pump. I
feel
very comfortable with that design.
I
may also install one of the glass filter that go inline with the hose,
putting
it forward of the firewall. They're only $10 and it would give
me
a decent preflight check that nothing has gone horribly wrong
upstream
while I wasn't looking. Is that sound reasoning?
-------------------
My philosophy is that you
put a water/debris trap, or sump, upstream from the pump; but nothing much
finer than a screen door screen. The last thing you want is pressure drop
upstream from the pump, and a fine filter with a bit of dirt in it could
definitely cause a vapor lock. The PRM-81794 claims filtering down to 2
microns, and pressure capability of 90 psi. That says “downstream
from the pump” to me.
Al