Turbine flowmeter is a kind of speed instrument, which has the advantages of high precision, good repeatability, simple structure, high pressure resistance, wide measuring range, small size, light weight, small pressure loss, long life, simple operation, easy maintenance, etc., used to measure the volume flow and accumulation of low viscosity, no strong corrosion and clean liquid in closed pipelines. It can be widely used in petroleum, chemical industry, metallurgy, organic liquid, inorganic liquid, liquefied gas, urban gas pipe network, pharmaceutical, food, paper and other industries.