These piston rings in turbocharger are designed to reduce oil blow by of the turbine (rear) seal and can withstand extreme temperatures caused by your turbocharger.
On the contrary,If the gap is too large, it is difficult to achieve the sealing effect, resulting in oil leakage.
For turbo pistons of compressor sides, Refone's working gap can be between 0.03-0.13 inches.
At the same time, in order to adapt to the high temperature when the turbocharger works, M2/tungsten steel is used for the piston at the turbo end, and 3Cr13 steel is used for the compressor end.
Feel free to contact Refone and let us know your customization needs.