Product Name: SULZER ZAV40S Exhaust Valve Guide Model NO.: SULZER ZAV40S Condition: New Engine Position: Inboard Engine: 4 Stroke Engine Capacity: >6L Fuel Type: Diesel Material: Gg25 Dimensions: 59diax48diax28dia. Borex250length Surface Treatment: Phosphating Trademark: TEQRUN Transport Package: Plywood Box Specification: CCS, BV, GL Origin: Nanjing China HS Code: 84099910 Product Description Description ofExhaust Valve Guidefor Sulzer ZAV40S1. Material: GG25(standard), Alternatives: High alloy cast iron, Broneze, etc...A). Mechanical properties(GG25):Tensile strength: 250MPa min. Hardness: HB220-260B). Matrix: Perlite, ferrite 10% max.; Graphite: Preferably lamellar and uniformly distributed; Phosphide eutectic: Preferably continuous network.2. Guide bore to be gun drilled and plateau honed for excellent bore diameter and straightness and achieving cross hatch pattern for better running-in;3. Fitting diameter to be ground, and achieving max. 0.0008' concentricity between guide bore and fitting dia.4. Surface treatment: Phosphating or Tufftriding.5. Casting defects and welding repair are not allowed.