✦Principle
The metal tube float flowmeter has the advantages of simple structure, reliable operation, high accuracy and wide application range. It can withstand higher pressures than glass rotameters. NYLZ-L series flowmeters have local indication, electrical remote transmission, limit switch alarm, corrosion resistance, jacket type, damping type and explosion-proof varieties. Widely used in national defense, chemical, petroleum, metallurgy, electric power, environmental protection, medicine and light industry and other departments of liquid, gas flow measurement and automatic control.
When the bottom-up fluid passes through the upright measuring tube, the float rises under the action of the pressure difference, and the height of the float rise represents the size of the flow. The magnetic steel in the float is coupled with the magnetic steel in the indicator and transferred to the indicator to drive the pointer in the indicator to rotate.
✦Show fault phenomenon
Valve fully closed, flowmeter indicates full scale
✦Process check
1, the valve is fully closed, the flow meter indicates full scale, first consider the flow meter rotor stuck.
2, whether the rotameter head is damaged, whether the cone tube is blocked.
✦Treatment method
1. Use a screwdriver to absorb the magnetic part of the rotameter to initially check the reaction of the flowmeter, normal, no falling off phenomenon, tap the bottom of the flowmeter with a rubber hammer, and still show the full scale, and judge it as the rotameter card.
2. Remove the thermal insulation cotton, open the heat tracing, wear gloves, and prepare to remove the flow meter.
3, remove the four screws of the lower flange, the force should be uniform, and then remove the screws after the pressure is discharged.
4, remove the flow meter, remove the circlip, remove the rotor, the rotor is attached with iron powder. Wipe off with a rag and rinse with water.
5. Install the rotor, move up and down with the screwdriver against the rotor, move flexibly, and install the flowmeter.
6, the flow meter to the process use, normal operation.
Thank you
