We have Reciprocating type Dresser Rand make Natural Gas ( BOG) compressor.. It is 2 stage 4 cylinder compressor.Recently we have done complete overhauling of the machine and replaced all piston ring and rider ring with new one. In HP NDE Cylinder Piston rubbed the liner after only 50 hrs of running hour. With same piston ring and rider ring we are getting more than 4500 running hour life. In one piston there is 2 Piston and 2 rider rings. Construction of rings is Rings Split type.
What are probable reason for failure??