... Cast Iron 3.HRC 65-70 excavator part for komatsu, cat, volvo, hitachi mechanical sealDescription:Mechanical seals are a special ... machines. Diameter 35mm ---- Diameter 1425mm Types:Mechanical seals for komatsu, cat, volvo, hitachi: the most common form is Type DO,which ... as a secondary sealing element instead of the O-Ring.Technical data for metal seal rings: Material 9Cr6Mo 15Cr3Mo 15CrMo Process Cast ...