... Cast Iron 3.HRC 65-70 excavator part for komatsu, cat, volvo, hitachi mechanical sealDescription:Mechanical seals are a special form ... machines. Diameter 35mm ---- Diameter 1425mm Types:Mechanical seals for komatsu, cat, volvo, hitachi: the most common form is Type DO,which ... the other hand, has an elastomer with a diamond-shaped cross section as a secondary sealing element instead of the O ...