inlet & outlet diesel spare engine parts for auto(2015 best factory)

  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 Engine Valve 2. Generator Engine Valve 3. Mobile machinery engine valve 4. Sinotruk engine valve   Welcome to our factory and we will offer you our best service all the time!   We attend exhibition         Production Flow     Technology     Inspection Equipment All our engine valves are inspection 100% before delievery to promise every valves are perfect when clients recieved the valves.         After-Sales Service 1. warranty time:2 years or 100 000 kilometers  2.Loading the goods, we will track all the way, to ensure product safety,quick to arrive at the designated ports. 3.Our products are strictly follow ISO9001,SGS,CE and BV certificate     FAQ 1.stem-diam: 4.5mm-40mm      head-diam: 20mm-150mm      full-length: 50mm-800mm 2. We accept custmerized. 3. ISO9001:2000 4.Intake valve: 4Cr9Si2   Exhaust valve: 21-4N, 21-4N+4Cr9Si2, also customized. 5.Warranty: 2 years or 160 000 kilometers 6.within 7 days if in stock within 25 days if no stock 7.Port: Any port in China.