Air compressor piston ring is made with utmost care and dedication using top grade cast iron and modern technologies. It provides superior capability for sealing CNG. When a piston is placed again, this tool is used to compress the piston rings. In addition to this, the said product allows the piston to slip into the opening of the piston ring compressor for completing the task. Air compressor piston ring contributes in sealing the combustion chamber to reduce gas leakage into the crank case. This product also improves the piston-to-cylinder wall heat transfer. It ensures that there is the right amount of oil between the piston and the cylinder wall.