Shaft seal water flowmeter

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The most direct method to test the quality of a pumping pump is to combine visual inspection, power on testing, and performance parameter measurement for comprehensive judgment. 1. Carefully inspect the appearance and sealing of the pump body for cracks, deformation, or severe corrosion. All connecting components (such as bolts and pipe joints) should be tightened without looseness. Focus on checking whether there are any leakage marks at the joint of the shaft seal (mechanical seal or packing seal) and the pump body. Any dripping water indicates seal failure. 2. Electrical safety testing (key step) Use a megohmmeter (insulation resistance meter) to measure the motors insulation edge performance. Connect one end of the probe to the motor winding terminal and the other end to the motor metal casing. The measured insulation resistance value must be greater than 0.5 M Ω to be considered safe and qualified. If the resistance value is too low, it indicates that the winding is damp or the insulation is damaged, and there is a risk of leakage. It is strictly prohibited to power on. 3. Power on operation testing should be carried out on the premise of ensuring good insulation. Observe whether it is smooth at the moment of startup and listen for the sound of operation. Normal should be a steady and uniform buzzing sound. If there is severe vibration, harsh friction sound or abnormal noise, it may indicate mechanical faults such as bearing damage, impeller rubbing or rotor sweeping, and the power should be immediately cut off.

4. Performance testing (quantitative judgment) This is the core of judging the performance of the pump. Measure actual operating parameters using flow meters and pressure gauges. Compare the measur

ed flow rate (m ³/h) and head (m) with the rated parameters indicated on the pump nameplate. If the measured value is significantly lower than the rated value (such as less than 10% -15%), it indicates that the pumps performance has seriously declined due to wear, cavitation, or internal leakage. 5. Common faults correspond to the phenomenon of complete inability to start: usually power supply, cable, or motor winding open circuit problems. There is noise but no water output/low water volume: it may be due to poor air intake or sealing, which prevents the formation of a vacuum, or the impeller/pipeline may be blocked. Overheating or tripping after running for a period of time: may result in winding short circuit, bearing damage leading to excessive load, or unstable voltage.

2. What are the common spare parts for medium pressure reverse osmosis?

Common medium pressure reverse osmosis spare parts mainly cover six categories: core membrane components, pretreatment systems, membrane shell matching, measurement and control instruments, fluid control, and general sealing consumables. The following are specific details.

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