ISO Seal Aluminum inner and outer ring

Both ISO-F and ISO-K flanges use the same Centering Rings. ISO seals are rated to a vacuum range of 10-8 mBar. These Centering Rings have a metal support ring with additional Outer Ring and elastomer seal.

Vacuum range: Elastomer seal: >1 x 10-8 mBar
Temperature range Viton: -20 C to 200 C