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Request a Quote. All Seals stocks virtually every seal product you need in virtually every material. This includes a full complement of rubber, machined plastics and standard materials. As you can read in this sectionâs pages, selecting the right material for a seal is crucial. We offer selection guidance in these pages, however, we also encourage you to contact our expert staff for questions and recommendations.
Are there any differences between black, brown or green viton flat seals. I have an application (Steam @ 140Â°C pressure 2.3bar-also vacuum at 100mbar) where I have validated the use of a 70 shore hardness Viton seals on some Solenoid valves. The seals were black in colour.iton or more general Fluorocarbon rubber (FKM or FPM)includes different materials. They can have different fluorine content (between 66 and 71 % fluorine) and hence very different swelling behaviour in solvents as e.g fuels, aromatics, methanol ...