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Subject: RE: [FlyRotary] Re: EWP check valves
Date: Mon, 20 Oct 2003 15:54:41 -0400
Message-ID: <0B27ED95697C4D4CBC82D79E790FE567086FA5@exchange.rfgonline.com>
Thread-Topic: [FlyRotary] Re: EWP check valves
Thread-Index: AcOXQlZSC5v016uJRFiTPVoz5QdpywAAEXhQ
From: "Robinson, Chad" <crobinson@rfgonline.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

> Where did the 2" hose requirement come from?  Wasn't Tracy=20
> running with 5/8" hose to his radiators?  Can we get a survey=20
> of working installations to see what size hose is sufficient?
>=20
> This is a significant issue for me.  I'm considering a=20
> remotely located radiator.  Running 2" hose for 7ft or so is=20
> out of the question.

It's not a requirement at all. It just happens to be the maximum hose =
size specified for this pump, and I figured I'd pick it to give Jim the =
fairest possible comparison since he's thinking of making one. If you =
want to search for more suitable options for you, the place to go is =
www.mcmaster.com and then click "Check Valves" under Process Control and =
Instrumentation. It's the fifth item or so on the line.

I didn't like the options on the first page for a variety of reasons =
(size, temperature handling, etc) so I browsed through until I hit page =
370 (see the link at the top of the page). The item I picked was "Bronze =
Class 125 Horizontal-Swing Check Valves", and I selected the 2" valve to =
give the highest price possible for comparison. If you have, say, a 1.5" =
dia cooling hose, you want 4708K57, which is only $40.19. All prices are =
USD.

Note that these are "horizontal swing" valves, which are very similar to =
the descriptions Jim and Ernest offered.

Whoever buys one first, would you please let me know what they weigh?

Regards,
Chad