[TPIN] Valve Sticking

[Allegro69]

----- Original Message ----- 
From: "Paul Kurtz" <kurtzph at comcast.net>
To: <tpin at tpin.okcu.edu>
Sent: Tuesday, January 02, 2007 4:12 PM
Subject: RE: [TPIN] Valve Sticking


> Bob DeSavage and all, interesting comments about the monel-plated
> valves. I've heard this about these in the past although as you say, the
> debate's sticky!
> If it works well on aircraft components, though, it has to respond very
> well to extremely high temperatures, so that's interesting.
> I know from talking to techs that nickel is a bit self-lubricating and
> is used for certain fuel-regulating valves, so it's interesting all
> around!!
> Interesting stuff!
> Paul Kurtz Jacksonville, FL
>

I did a Google and came up with a lot of info which is both enlightening and
equally confusing. The article found on the Getzen Gazette touches on the
issue of the smoothness of nickel as opposed to the porous characteristics
of monel. It makes sense to me, where because of the surface condition of
monel, microscopic particles of crud could accumulate in these so called
pores that might otherwise be washed away on the smoother nickel plated
valves that don't have those nooks and crannies. Now that I'm getting older,
I need my glasses more to read, watch the big screen TV, and shoot pool.
Even with glasses, I have those days when they're not enough. On the flip
side of the coin though, when it comes to examining and cleaning my valves,
it seems as though I have microscopic vision where I don't need glasses and
can immediately spot the most minute particle of crud on my valves. Go
figure! But I have the cleanest valves on the planet. 8-)

http://images.google.com/search?hl=en&q=monel+vs.+nickel+plated+trumpet+valves