best quality OEM/ Drawing/Sample/Custom manufacturing valve

best quality OEM/ Drawing/Sample/Custom manufacturing valve         Shijiazhuang Hongfa Internal Combustion Engine Fittings Factory     1. We can product the following:         2.Materials of engine valve:  
Normal material:INLET VALVE IS SUH1(40Cr) ; EXHAUST VALVE IS SUH3(4Cr9Si2). Best material:INLET VALVE IS SUH3(4Cr9Si2) ; EXHAUST VALVE IS SUH35(21-4N).       3.Size of engine valve:      Stem-diam:4.5mm-40mm   Head-diam:20mm-150mm   Full-length:50mm-800mm      4.Production technology:         5.Production equipments:         6.Inspection and Test equipment:    
  7.Packing:   Neutral packing or as your requirement.       Our Services