Product Name: metallurgical Valve-Powder Valve Trademark: qian-gong-feng Transport Package: Wooden Cases Specification: DN100-1200 Origin: Hebei HS Code: 8481202000 Product Description Manual cement butterfly valves are mainly used for switching material boxes, hoppers and silos with powder or granular materials. Manual cement butterfly valves can be used for the treatment of all powdery and particulate materials. The valves use the gravity of the material itself to intercept and pneumatically transfer dry materials. It can be installed under hopper, bin, silo, screw or other types of conveyor, and connected with pneumatic conveying pipeline. Because of the special structure of the valve and the use of Engineering materials, it has always been a very economical and highly efficient choice.