Valve Handle Ductile Iron Sand Casting Process Machined by NC Machine and Drilling Machine Checked by plug gauge Valve HandleGrey Iron,Ductile IronSand Casting ProcessMachined by NC Machine and Drilling MachineISO9001:2000Checked by plug gauge1. Name: Machining Handle,Casting Handle, Gate Valve Handle, Valve Hndle2. We cast the parts by Sand Casting. The materials include Grey Iron, Ductile Iron ...