... who produces API 6A products, their Valves gate plate and Valve seats will select supersonic spray, spraying tungsten carbide materials ... coating abrasion resistance, can provide more protection.Product PictureProcedure for TC Coating ProcedureWorking Content Checkingmatrix hardness, size, parallelism, macroscopic ... Oil, Chemical industry,etc. Product avliable Oil,Gas,Water,etc. Product inspection