TPR Co., Ltd.

TPR Co., Ltd. (TPR株式会社) is headquartered in Chiyoda-ku, Tokyo, and describes its business around powertrain and frontier fields as well as other products and services. Its official site presents piston rings and valve seats as products, and its corporate overview lists offices, plants, a technical center, a frontier innovation center, and group companies.

• Piston rings

  Piston rings are parts between the piston and cylinder that help the engine work efficiently; they have four main functions: sealing combustion gas, controlling lubricating oil, transferring heat, and supporting piston posture.

• Valve seats

  Valve seats are the seats for intake and exhaust valves; they contact the valve and keep the combustion chamber airtight, and are produced by a sintering method.

1. 1TPR株式会社tpr.co.jp
2. 2会社概要 | TPR株式会社tpr.co.jp
3. 3ピストンリングとは？ | TPR株式会社tpr.co.jp
4. 4バルブシートとは？ | TPR株式会社tpr.co.jp