with
an ideal combination of free and combined carbon to provide
prolonged working life. The casting used has a very fine grain
to provide high tension even at elevated temperatures of high-speed
engines. Hard chromium is Electro-deposited on the periphery
of piston rings to achieve high abrasive wear. Duaflex oil
control piston rings are chromium plated on their fully radiused
edges to provide wear resistance wiping surface free of sharp
corners or cutting edges which may cause bore wear. Each iron
ring is Parco lubrized and it produces a lightly etched surface
to provide oil retaining phosphate coating. This type of surface
minimises scuffing, assists running in and affords some protection
during stotage. Each of piston rings is properly inspected
by modern techniques to ensure material and dimensional accuracy
for the best results of high compression and less oil usage. |