Description
KMZ 131 piston ring contains 4 pieces of piston rings which including 1st ring,2nd ring,3rd ring and the oil ring.The diameter is 130 mm for STD size,the other sizes' diamter is updated accordingly.The material of KMZ 131 is Ductile Cast Iron.The surface treatment for all the 4 pieces is Phosphoric treatment and the 1st ring is been added Surface Chromium Plating.All the techincal standard is according to GB/T -1149 standard.