What is this material? What is this material? amoncur (Mechanical) (OP) 18 Aug 15 00:07 Hi All, Trying to figure out what this material is (it's a flapper for a check valve). OD is about 7/16". Anyone know? Aaron RE: What is this material? Compositepro (Chemical) 18 Aug 15 00:28 It is a woven fiberglass fabric composite. The resin may be anything but is likely phenolic or epoxy. RE: What is this material? MintJulep (Mechanical) 18 Aug 15 00:30 As a guess, since that's really all that possible from the information you give. Some sort of fabric impregnated with some sort of elastomer. RE: What is this material? amoncur (Mechanical) (OP) 18 Aug 15 04:30 Compositepro - thank you so much for the info! If anyone knows what this is, it would be someone with the name "compositepro" :) Have you seen this used as a flapper for check valves? Do you know if there is a specific sheet/film material to source or a specific vendor that supplies this material? RE: What is this material? ornerynorsk (Industrial) 18 Aug 15 13:20 The material selection is entirely dependent on the application and fluid compatibility requirements. It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all. RE: What is this material? EdStainless (Materials) 18 Aug 15 15:41 Looks like canvas reinforced phenolic. For lists of possible materials look here: http://www.nationwideplastics.net/plastics/phenoli... http://www.aetnaplastics.com/products/d/Phenolic = = = = = = = = = = = = = = = = = = = = P.E. Metallurgy, Plymouth Tube RE: What is this material? amoncur (Mechanical) (OP) 19 Aug 15 00:56 Hi All, Thank you again for the responses. The two links EdStainless provided look very promising. I will look through them more carefully tomorrow. I also found something on McMaster that might be a close match (if not the same material): http://www.mcmaster.com/#grade-g-10-garolite/=yjwa... RE: What is this material? CoryPad (Materials) 19 Aug 15 14:57 I think the part in your photograph has glass fibers, not canvas. The material in your link appears similar to the material in your photo. RE: What is this material? Compositepro (Chemical) 28 Aug 15 17:35 Yes, G-10 Would be very similar, if not the same, material. RE: What is this material? dgallup (Automotive) 28 Aug 15 18:36 All the G10 I've seen is too rigid and brittle for a flapper valve. ---------------------------------------- The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.