A, V cone flowmeter description:
V cone flowmeter is a new type of differential pressure type flow measurement instrument, can be measured the various kinds of liquid, gas, steam and gas-liquid two phase medium. Flowmeter is in the catheter center install a cone to throttling, through the measurement of the cone to measure flow and differential pressure. The geometry of the cone shape and traditional throttling element has a lot of advantages comparing, so it is a new generation of the throttle device. V type cone flowmeter with a traditional pressuredifference type, the group, led by three pressure pipe, differential pressure transmitter, flow product is of volume flow standard instrument measuring system. For gas and steam can be compressed medium, can realize the temperature, the pressure, compensation, the quality of flow measurement system. Flowmeter with superior performance is applicable to different work environment, especially in the industrial production of flow rate, low pressure, high moisture gas and coke oven gas and natural gas flow measurement of dirty. V type widely quoted cone flowmeter in petroleum, chemical industry, natural gas, long distance pipeline network, heat pipe network, metallurgy, electric power, water treatment, pharmacy, papermaking, foodstuff, aerospace and other industries.

Second, V cone flowmeter features:
· sweep type design make V type cone flowmeters have since clean function, no stranded area
· no harsh straight section of requirements
· boundary layer effect instrument wear resistance, throttles area long-term stability, signal stability
· suitable for two-phase measurement
· back pressure stable, relatively little pressure loss

Three, V type cone flowmeter main technical parameters:
· nominal diameter: DN15-DN2000mm
· heavy after sex: plus or minus 0.1%
· nominal pressure: 1.6, 4.0, 10, 16, 25, 40 MPa
· quantity process than: 10:1
· the accuracy of the essence: plus or minus 0.5%
· β van circumference: 0.45 ~ 0.85
· medium temperature:-50 ℃ ~ + 700 ℃
· straight pipe sections: upstream 0 ~ 3 D
Downstream 0 ~ 1 D
· pressure drop small: close to the venturi tube
· stability: throttling area of long-term stability, signal stability