1. Diesel engine valve seat ring 2. ISO 9001-2000 3. Quality casting and machining parts. 4. OEM & ODM welcomed. Valve Seat Ring1. Engine parts valve seat ring is used for different egines, Automobiles, Marines, Air compressors, Engineering machines engine...etc.Engine Type: 6BT, 6CT, NH220, 6BT145, 6BTA, 6BTAA, 6CT8.3, 6CTA, 6CT-300, NH250, NT855, NH250A, K19, V265, V300, V6E-195, VT6-280 etc .2 ...