Suitable Gasket Materials
Suitable Gasket Materials
(OP)
I'm looking for a suitable gasket material for intake chamber.
It is to seal an aluminum surface with a composite surface. Max temperatures will be around 130 deg celcius. The surface of the composite is not machined & is slightly textured so the gasket must deform & seal this region effectively. Naturally the first thing to consider is some type of rubber, but for the main objective of durability & re-usability, what type of rubber would be best or maybe something other than rubber?
It is to seal an aluminum surface with a composite surface. Max temperatures will be around 130 deg celcius. The surface of the composite is not machined & is slightly textured so the gasket must deform & seal this region effectively. Naturally the first thing to consider is some type of rubber, but for the main objective of durability & re-usability, what type of rubber would be best or maybe something other than rubber?





RE: Suitable Gasket Materials
Regards
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RE: Suitable Gasket Materials
Thanks..
RE: Suitable Gasket Materials
If the composite were flat enough, paper would work, once.
Mike Halloran
Pembroke Pines, FL, USA
RE: Suitable Gasket Materials
Viton®(Fluorocarbon Type A) Temperature Range: -15ºF to 400ºF
Silicone Temperature Range: -65ºF to 450ºF
Chemraz® / Kalrez® / Simriz® (Perfluoroelastomer) Temperature Range: -10ºF to 615ºF
Fluorosilicone Temperature Range: -80ºF to 450ºF
ISZ
RE: Suitable Gasket Materials
Regards
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RE: Suitable Gasket Materials
RE: Suitable Gasket Materials
If you can afford the non-recurring costs, take a look at Parker's Gask-o-seals:
http://www.parker.com/ead/cm2.asp?cmid=3245
They can be re-used indefinitely and don't require any expensive machining operations for small o-ring grooves.
As for the elastomer selection, you will need something resistant to fuel, oil, ozone, creep, compression set and have capabilites well within the adjacent manifold temps (266degF). Fluorosilicone or Viton will work nicely, but they are suprisingly expensive.
Give Parker a call.
RE: Suitable Gasket Materials
RE: Suitable Gasket Materials
RE: Suitable Gasket Materials
There are several options open to you.
Find a local rubber supply house and find out what they do have in stock in thin sheet, and what temperatures it will withstand. If it is fabric or reinforced even better.
Find the cost of having a mould made. The cost will be very dependant on production rates required.
If the numbers are low, use silicone rubber. To do this, wet the smooth mating surface of the metal part with washing up soap solution.
Lay a bead of silicone rubber a bit thicker than your required gasket final thickness onto the rough dry surface mating surface of the carbon fibre part.
Gently press the parts together, possibly using a jig to keep them at the required gasket thickness.
Leave until the silicone is cured, then tighten down against the gasket that was cast in place.
The gasket will stick to the carbon fibre part, but not the metal part on disassembly.
Regards
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Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: Suitable Gasket Materials
Cheers
http://www.mcmaster.com/ p/n 9556K81
I don't know anything but the people that do.
RE: Suitable Gasket Materials
http://users.rcn.com/wgknestrick/ITBs%20001.JPG
You can see the Orings (they are white) around the ports.
RE: Suitable Gasket Materials
As far as O-ring material, Viton is fairly durable and readily available. Apple Rubber has a very good O-ring design guide that can help you with everything from material selection to groove design, etc. Even if you decide not to use an O-ring for your application, this is a good resource to have around.
http://www.applerubber.com
-Reidh
RE: Suitable Gasket Materials
If so, I'd expect to have to consider whether or not to include features to limit compression and allow fastener torquing, flange thicknesses to provide uniform clamping, how much hardware will be supported by the gasketed joint,
and to resist the temptation to tap the composite material for threads.