... : - 75oC ~ +200oC 3. Speed: 25m/s Mechanical SealsCartridge seals, shaft seals HF670,675,676,680 Applications:Petrochemicals, Oil refining and cooling ... ultra-thin double-decked dual "S" welded metal bellow pipe as the elastic component, which have excellent dynamic performance.3 ... system standard. Low Temperature range Metal Bellows Mechanical Seals, Cartridge seals, shaft seals HF670,675,676,680