Excavator R210LC-9 R220LC-9 R235LC-9 Boom Cylinder Seal Kit Repair Kit 31Y1-28960

Oil seal material: main oil seal (thickness: Japanese standard)

1. Ordinary model: P6000 (MDI caprolactone) (Parker p6000 material formula improved, K grade), the main oil seal material of other manufacturers in the market is basically P6000; high temperature resistance 110°, limit temperature 120°; (cost 16w/ton , lower loss rate)

High-elastic and upgraded models: PPDI (polyurethane), the material used in military missiles; high temperature resistance 150°, limit temperature 170°; its resilience is 30% higher than that of P6000 material, and its wear resistance is also twice that of P6000 material; ( The cost is 60w/ton, and the loss rate in the manufacturing process is 30%--50%, the larger the model, the higher the loss rate); the hardness of the Boris main oil seal is 96°, which is the highest hardness standard, but it feels softer; others on the market The hardness of the oil seal is basically 95°, and it feels hard);