principle and structure
The stainless steel glass rotor flowmeter consists of a conical glass tube that expands from bottom to top and a stainless steel float that moves up and down with the fluid flow rate (Figure 3). When the fluid flows through the conical tube from bottom to top, the lift S generated by the kinetic energy of the fluid on the float and the buoyancy A of the fluid cause the float to rise. When the sum of the lift S and buoyancy A is equal to the weight G of the float itself, the float is in equilibrium and stable at a certain height position. The scale on the conical tube indicates the flow rate value of the fluid.
The float reading position in the flowmeter is shown in Figure 2:

The cone tube of KY-LZB series glass rotor flowmeter is a smooth inner wall tube (see Figure 4). For flowmeters with a diameter of DN15 or more, the float moves up and down through the guide rod to maintain stability; There are three guiding ribs on the inner wall of the cone tube of KY-LZB flowmeter, which keep the float stable (see Figure 4). Flow meters with a diameter of DN10 or less are connected by hoses and equipped with needle shaped flow control valves; Flow meters with a diameter of DN15 or above shall be connected with flanges.

Materials of components in contact with measuring fluids []