Working principle of metal tube float flowmeter

Project Overview

The float of the metal tube float flowmeter is in the measuring tube. As the flow rate changes, the float moves upward. At a certain position, the buoyancy force on the float and the gravity of the float reach a balance. At this time, the flow annular area between the float and the orifice plate (or tapered tube) remains constant. The annulus area is proportional to the rising height of the float, that is, the rising position of the float in the measuring tube represents the flow rate. The changing position of the float is transmitted by the internal magnet to the external indicator, so that the indicator correctly indicates the flow value at this time. . This prevents the indicator housing from being in direct contact with the measuring tube. Therefore, even if a limit switch or transmitter is installed, the instrument can be used under high temperature and high pressure working conditions.