V-cone flowmeter is 80 years of the 20th century, a novel differential pressure flowmeter, a differential pressure flowmeter in a new product, is by the majority of users. V-cone flowmeter principle is based on conversion of energy in closed conduits Bernoulli's law, the use of V cone in the flow field generated by throttling effect to measure flow. Proven long-term, it has high accuracy, good repeatability, limited by the installation conditions of small, wear-resistant, wide measuring range, suitable for dirty media, pressure loss is small. 
 V cone itself as a rectifier and flow into a unique new type of flowmeter excellent performance. It uses similar principles with the throttle plate, suspended in the pipe center line of a special streamlined cone to cut costs, in the cone area in front of the steady flow of high pressure PH and take the pipe in the center of the tail cone steady flow District to take negative pressure PL, the Reynolds number 8000 to 500 million range, is proportional to the square root of flow and pressure.