Ship offshore diesel engine parts for MAN B&W L23/30H

    Product Description Generally Raw Material: Intake valve: 4Cr9Si2 Exhaust valve: 21-4N, 21-4N+4Cr9Si2, also customized.  Material Especially for Marine valve spidles: 1. Si-Cr (4Cr10Si2Mo) 2. Ni-Cr-Mn-N (23-8N) 3. Ni-Cr-W (SNCRW) 4. NI (NI80A) Harden process for valve seats' surface: 1. High frequency quenching 2. High alloy welding Harden process for valve stem: 1. Chrome-plating 2.Nitriding 3.Quenching/Spray welding  Simple dimension arrange of our valves: d: 10-100mm D: 45-500mm L: 120-1787mm  Advantages: High Attrition and Temperature Endurance High Erosion and Concussion Endurance Good hardness, wear      Company Information The biggest Engine valve factory in north China,Specialized in produce:  1.Marine inlet valve spindle and exhaust vale spindle (valve stem) 2. Generator Engine Valve 3. Mobile machinery engine valve 4. Sinotruk engine valve 5. Locomotive engine valve   Welcome to our factory and we will offer you our best service all the time!   Production Flow   Technology   exhibition Exhibition on Automechanika Shanghai and Automechanika Russia   Certifications