The worm gate valve is gear transmission, stable performance, suitable for large diameter pipeline,it is one of the most common off cut-off valve. Bevel gear valve closure (gate) with flexible structure, can automatically compensate the body caused by abnormal load or temperature deformation in the work. Therefore, reliable sealing, and no wedge pillar. Bevel gear valve has small fluid resistance, pressure resistance, high temperature resistance, and has the advantages of labor saving, closed. Apply to water, oil, steam, strong oxidizing medium, urea and other media. Worm gate valve are widely used in petroleum, chemical, electric power, construction, shipbuilding, machinery, food industry etc