factory from 1990 Hollow sodium-filling valve

 Our factory is the only one factory who can produce titanium engine valve in China. the only one factory who not only can produce motorcycle engine valve, car engine valve, locomotive engine valve but also marine engine valve 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!   Technology   Production Flow   Packaging & Shipping Inner package is plastic bag,outer package is wooden case. also pakcing can be as your demand.   exhibition Exhibition on Automechanika Shanghai and Automechanika Russia