1. Diesel engine valve seat ring 2. ISO 9001-2000 3. Quality casting and machining parts. ... Seat Ring1. Engine parts valve seat ring is used for different egines, Automobiles, Marines, Air compressors, Engineering machines engine...etc.Engine Type: 6BT ... , V300, V6E-195, VT6-280 etc .2. Wide range size for different bran engine. Cummins, Hino, Mitsubishi, Yamaha, Benz, Deutz, Komatsu ...