Worm trench butterfly D381X-16 [Product Name]: Worm trench butterfly, cast iron butterfly valve Fire [Color]: Red Product Material: cast iron, ductile iron Product use: Simply the butterfly structure, excellent performance, widely used. The main shut-off valve for use, the product can be installed in the petroleum, chemical, food, pharmaceutical, textile, paper, water, electricity, shipping, urban drainage, refining, energy and other systems all corrosive, non-corrosive gases, liquids , semi-fluid, and the use of regulation and shut-off device as a solid powder pipelines and containers. [Features]: 1, novel design, reasonable, unique structure, light weight, open and close quickly. 2, the operation torque is small, easy to operate, energy smart. 3, can be installed in any position, and easy maintenance. 4, the seal can be replaced, reliable sealing performance bi-directional sealing reach zero leakage. 5, sealing material aging, corrosion resistance and long service life. 6, to be completely sealed, gas leak test is zero. 7, choose different materials, applicable for a variety of media.