O Ring material choice

This topic has 2 replies, 2 voices, and was last updated 27 August 2015 at 16:12 by JasonB.

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27 August 2015 at 13:40 #202176
Tony Martyr
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@tonymartyr14488
I am building a Beam Engine which is using O rings rather than graphite stuffing for the piston seal and those for the valve stem. The best supplier site offers rings of the correct size but with a choice of material which includes: nitrile, fluorosilicone, neoprene, polyurethane, silicone and viton. Which should I use for a low friction steam engine?

Tony
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27 August 2015 at 13:40 #24063
Tony Martyr
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@tonymartyr14488
27 August 2015 at 16:12 #202194
JasonB
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@jasonb
I have silicon on the traction engine in my avitar both for the piston and all glands but on my larger stationary engines I use Vitron on the piston. You will really need to lap or at the least hone the bore so it does not abrade the ring.

J
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O Ring material choice

O Ring material choice

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