1、 Overview

LZB plastic tube flowmeter/LZSThe main components of the plastic tube flowmeter, such as the cone tube, are all made ofAS、ABSMade of plastic, it has good corrosion resistance. The product also has the characteristics of reasonable structure, small volume, light weight, and the cone tube is not easy to break. The plastic tube rotor flowmeter can be widely used in industrial sectors such as chemical, environmental protection, and food.

2、 Principle and Structure

The main measuring components of LZB plastic tube flowmeter/LZS plastic tube flowmeter are a conical plastic tube with a small end facing downwards and a large end facing upwards, and a float that can move up and down inside. When the fluid flows through the conical plastic tube from bottom to top, a pressure difference is generated between the upper and lower parts of the float, and the float rises under this pressure difference. When the force that causes the float to rise is equal to the combined force of gravity, buoyancy, and viscosity acting on the float, the float is in an equilibrium position. Therefore, there is a certain proportional relationship between the fluid flow rate flowing through the flowmeter and the rising height of the float, that is, the flow area of the flowmeter. The position height of the float can be used as a measure of flow rate.

3、 Installation

[]1] Before installation, gently take out the foam support in the instrument with pointed nose pliers, and then install it again. During installation, pay attention to whether the rubber washer is installed in the groove of the connecting pipe to prevent water leakage.

[]2The interface of the flowmeter can be connected with matching ABS plastic pipes or PVC plastic pipes, bonded with special glue, or connected with plastic method and then connected with metal flanges.

[]3The flowmeter must be installed vertically without obvious inclination, and its installation height should be convenient for reading the float. When reading, the line of sight should be level with the float. [General standard: The optimal flow rate required is the maximum flow rate of the flowmeter.]50％-70%Try not to use the highest number. []

[]4The upstream and downstream inlet and outlet of the instrument should be ensured to have5A straight pipe section with a diameter larger than that of the instrument.

[]5The pressure of the side fluid must be stable. If the fluid is too strong and unstable, it will cause the float to fluctuate and cannot be measured correctly. A buffer or setting device should be installed upstream of the flowmeter.

[]6The plastic tube rotor flowmeter should be installed vertically, and the angle between the centerline of the flowmeter and the plumb line should not exceed5Degree.

4、 Use

[]1When using the instrument, the upstream valve should be slowly opened to full open first, and then the flow rate should be adjusted using the downstream regulating valve of the flowmeter. When the instrument is stopped, the upstream valve should be slowly closed first, and then the flow control valve downstream of the instrument should be closed.

[]2The reading of the instrument can be seen in the middle of the engraved line,Read the value from the ruler of the float according to the height it rises.

[]3When the cone tube and float are contaminated, they should be cleaned in a timely manner.

[]4Regularly check the error of the flowmeter. Once it exceeds the specified error, the float and cone tube should be replaced or recalibrated for better accuracy.

[]5When the measured fluid is inconsistent with the calibration medium of the flowmeter, the reading should be corrected accordingly. Represented by the following equation

QS=QN

LZB-( )STechnical parameters of short tube type

LZB-( )STechnical parameters of long tube type

LZB-( )STechnical parameters of flange type