... Investment casting 3.Used:Chemical Water Pump Impeller,Pump Shell,Sand Casting Parts Pump impeller as the part of different pumps, ... we can supply pump impeller, propeller, pump parts, valves and so on! Sand ... Sand casting (resin sand casting,green sand casting) .Machining: Turning, milling, drilling, grinding, threading, CNC machining, etc. .Finishing: Sand blasting, ...