| VitonŽ is normally used in vacuum service. VitonŽ has a low porosity to most gases and withstands high temperatures up to 200°C for short periods. Buna-N is low cost, but their maximum operating temperature of 100°C makes them unacceptable for many high temperature vacuum applications.
Silicone is used in chemical applications and can withstand temperatures of 200°C for short periods, but silicone tends to harden to prolonged high temperature service, sticking to the metal surfaces and making the o-ring difficult to be replaced. Silicone is also very porous to helium.
Contact LDS by phone (407) 862-4643 or fax (407) 862-8723 with any questions.
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VitonŽ is a registered trademark of DuPont Dow Elastomers |
