The main role of glass rotor flowmeter in industrial production

According to its use and scope of application, the glass tube rotameter can be divided into: ordinary type, ribbed vascular type, small flow and small shape type, corrosion-resistant type, laboratory type, heat preservation type, alarm type and high pressure resistant type. Series. According to the national instrument series type spectrum, no matter which series, it includes 12 calibers from 1 mm to 100 mm at most, and the measurable flow range is: liquid (water) 0.1 ml/min～40 cubic meters/hour, gas (Air) 1 ml/min～1000 cubic meters/hour. The glass rotameter used for environmental protection instruments generally has a caliber of no more than 10 mm, and the measured flow is in the small flow range.

The main measuring elements of the glass tube rotameter are a vertically installed lower small and upper large conical glass tube and a float that can move up and down inside. When the fluid passes through the conical glass tube from bottom to top, a pressure difference is generated between the upper and lower floats, and the float rises under the action of this differential pressure. When the rising force, buoyancy and viscous lift of the float are equal to the gravity of the float, the float is in an equilibrium position. Therefore, there is a certain proportional relationship between the flow of fluid flowing through the glass rotameter and the rising height of the float, that is, the flow area of the glass rotameter, and the height of the position of the float can be used as a flow measurement.