Application of panel flowmeter

SLLZB-MVc is a flow meter with high quality transparent organic glass as the measuring tube. Products should be mainly used for water treatment and environmental protection projects. Panel flowmeters can also be used in chemical, petroleum, light industry, medicine, fertilizer, food, papermaking and scientific research departments to measure single-phase liquid non-pulsating flow. Panel-type flowmeter also has the advantages of high transparency, intuitive reading, not easy to break, light weight, long life, installation and connection, etc., but the organic glass cone-shaped glass tube can not be used for organic solvents (such as trichloroethylene, dichloroethane) ).

The main measuring element of the SLLZB-MV panel type flowmeter is a conical tube with a small end down, a large end upright and a float that can move up and down. When the fluid flows through the conical tube from bottom to top, a pressure difference occurs between the upper and lower floats, and the float rises under the differential pressure. When the force that raises the float and the force of gravity, buoyancy and viscous force of the float are equal, the float is in an equilibrium position. Therefore, there is a certain proportional relationship between the flow rate of the fluid flowing through the flow meter and the rising height of the float, that is, the flow area of ​​the flow meter. The height of the float can be used as the flow rate measurement.

[1] When the flow meter is used, the upstream valve should be slowly opened to full open, and then the flow rate should be adjusted with the downstream valve of the flow meter. When the flowmeter is stopped, the upstream valve should be closed slowly before closing the flow control valve downstream of the meter.

[2] The indication value of the flow meter is seen in the engraved line. The height of the float is read from the scale of the float to read the indication.

[3] When the conical tube and the float stick, it should be cleaned in time.

〔4〕 Periodically check the error of the flowmeter. Once the specified error is exceeded, replace the float and cone, or recalibrate for better accuracy.

[5] If the measured fluid is inconsistent with the calibration medium of the flowmeter, the indication value must be corrected. It is expressed by the following equation QS = QN QS = Actual flow rate Qn = Flowmeter reading indication value ρn = Flowmeter calibrated medium density ρs = Measured medium density ρf = Float material density.