Valve Handle Ductile Iron Sand Casting Process Machined by NC Machine and Drilling Machine Checked ... , Gate Valve Handle, Valve Hndle2. We cast the parts by Sand Casting. The materials include Grey Iron, Ductile Iron etc.3 ... Bronze, Malleable Iron etc.2) Process: Investment Casting, Sand Casting (Resin Sand Casting, Green Sand Casting), Permanent Casting, Die Casting, Centrifugal Casting, Forging ...