Products
Marine and Industrial
Components and Parts
NPR-RIKEN has been supplying large-bore piston rings to marine engine builders around the world for many years.
We are working to provide not only products compatible with existing fuels but also those compatible with carbon-neutral fuels (LNG, ammonia, methanol, and hydrogen).
To contribute to the development of marine engines that will continue to meet environmental regulations through 2050, we will establish a robust development and production infrastructure.

Efforts toward Carbon Neutral
※Carbon-neutral Fuels:LNG, Methanol, Ammonia, Hydrogen
To keep up with the development trends of each engine licensor and its licensees, we take the following actions:
1)Proposing a wide variety of prototype piston rings applicable to field tests
2)Conducting rig tests in collaboration with external and public institutions
3)Conducting and verifying piston ring behaviour simulations to estimate impacts on tribological conditions of piston rings
CIMAC, Simulation, Technology Presentation/Technology Development
We are engaged in the following activities to contribute to the development of the marine industry.
1)Developing products anticipating customers' needs
2)Providing of highly value-added and reliable products
3)Presenting our latest technologies at specialized academic conferences and similar events

