Plastic rotor flowmeter

The main part of the cone tube of the plastic tube rotor flowmeter is made of AS and ABS plastic, which has good corrosion resistance. It has the characteristics of reasonable structure, small volume, light weight, and the cone tube is not easy to break. Plastic tube rotor flowmeter can be widely used in industrial sectors such as chemical, environmental protection, and food.

The main part of the cone tube of the plastic tube rotor flowmeter is made of AS and ABS plastic, which has good corrosion resistance. It has the characteristics of reasonable structure, small volume, light weight, and the cone tube is not easy to break. Plastic tube rotor flowmeter can be widely used in industrial sectors such as chemical, environmental protection, and food.

The characteristics of wear resistance and corrosion resistance can be accompanied by specific scales, calibrated dimensions, measurement range, and measuring tube materials, all of which have been marked on the measuring tube.

The connection methods can be divided into four types: plug-in, welding, threaded, and flange connection.

The main measuring component of a plastic tube rotor flowmeter is 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.

〔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.

〔2〕 The 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.

〔3〕 The 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 50% -70% of the maximum flow rate of the flowmeter, and it is recommended not to use high flow rates.]. []

〔4〕 There should be a straight pipe section of 5 times the diameter of the instrument at the upstream and downstream inlet and outlet of the instrument.

〔5〕 The 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.

〔6〕 The plastic tube rotor flowmeter should be installed vertically, and the angle between the centerline of the flowmeter and the plumb line should not exceed 5 degrees.

〔1〕 When using the instrument, the upstream valve should be slowly opened to full open first, and then the flow rate should be adjusted using the regulating valve downstream 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.

〔2〕 The reading of the instrument is shown in the middle of the engraved line, and the value is read from the scale of the float according to the height of the float rising.

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

〔4〕 Regularly 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.

〔5〕 When 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 QS=actual flow rate Qn=flowmeter reading indication ρ n=medium density during flowmeter calibration ρ s=measured medium density ρ f=float material density

Nominal diameter (mm)

model

measuring range

Allow the condition of the tested medium

accuracy

Short tube type

Temperature ℃

Pressure MPa

15

SK-LZS-15

5-50l/h

0-60

≤0.6

±5%

10-100l/h

16-160l/h

25-250l/h

40-400l/h

50-500l/h

60-600l/h

100-1000l/h

25

SK-LZS-25

100-1000l/h

160-1600l/h

250-2500l/h

32

SK-LZS-32

0.4-4m3/h

0.6-6m3/h

50

SK-LZS-50

1-10m3/h

1.6-16m3/h

65

SK-LZS-65

5-25m3/h

8-40m3/h

12-60m3/h

5-25m3/h

8-40m3/h

12-60m3/h

100

SK-LZS-100

12-60m3/h

18-90m3/h

20-120m3/h

125

SK-LZS-125

25-150m3/h

30-180m3/h