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EVAC Chain Clamp for Converting Elastomer (Viton/Buna) Seal NW25 KF25 to UHV (Ultra High Vacuum) Metal Seal
This EVAC Chain Clamp for NW25 KF25 flanges is for converting Elastomer (Viton/Buna) rubber seals to UHV (Ultra High Vacuum) metal seals. This allows for a lower vacuum compared to elastomer (Viton/Buna) rubber seals. Other benefits include: reduced outgassing, no permeation , no hydrocarbons, and resistance to radiation and higher heat. The resultant UHV seal has a helium leak rate of of less than 1 X 10 -11 standard cc/sec. They can also be baked repeatedly to 150°C (302°F). The EVAC chain clamp and an aluminum knife edge seal form the UHV vacuum seal between the connecting KF flanges
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