In the power industry, the reliable operation of mechanical equipment is essential. In pump equipment, over time, seals may lose their original sealing performance due to wear, aging, etc. Therefore, it is very important to determine whether the mechanical seal needs to be replaced or adjusted to ensure stable operation of the equipment. Next, let’s talk in detail about how to determine whether the mechanical seal M7N-90 needs to be replaced or adjusted.

Daily inspection and maintenance are the basis for ensuring that the mechanical seal M7N-90 is in good condition. First, regular visual inspections should be performed to observe whether there are cracks, wear or corrosion on the appearance of the mechanical seal. Secondly, monitor the sound of the pump when it is running. Abnormal noise may be a signal of a problem with the seal. In addition, use an infrared thermometer to measure the temperature near the pump shaft. Excessive temperature may indicate that the seal is rubbing or leaking. Regularly check whether there is liquid leakage around the pump, especially at the seal. Finally, use a vibration analyzer to detect the vibration of the pump. Abnormal vibration may indicate that there is a problem with the mechanical seal.

The main basis for judging whether the mechanical seal needs to be replaced or adjusted is as follows:

Leakage phenomenon: If obvious liquid leakage is found, it means that the mechanical seal has failed and needs to be replaced.

Abnormal sound: The pump makes abnormal sound during operation, which may be caused by damage or wear of the mechanical seal. At this time, replacement should be considered.

Abnormal temperature: If the temperature near the pump shaft continues to be higher than the normal range, it may be caused by increased friction between the mechanical seal and the shaft, which needs to be adjusted or replaced.

Vibration intensification: The vibration of the pump increases significantly, which may be caused by wear or imbalance of the mechanical seal and requires further inspection.

Performance degradation: The efficiency of the pump decreases significantly, which may be caused by fluid leakage due to mechanical seal failure, affecting the performance of the pump.

Regular inspection and maintenance of the mechanical seal M7N-90 can effectively prevent the occurrence of faults and extend the service life of the equipment. In the actual operation process, technicians should flexibly apply the above judgment basis and technical steps according to the specific situation to ensure the stable operation of the pump.
Yoyik offers various types of valves and pumps and its spare parts for power plants:
PRO-DV insert seal DN100 mm ( silicone ) P17458C-01
bellow seal globe valve Q23JD-L10
Moog servo valve G771K201
Moog valve D633-303B
steam shut off valve KHWJ25F-1.6P
Cooling fan Y2-112M-4
LIMIT SWITCH RPH-02
VALVE 73218BN4UNLVNOC111C2
Shaft P1171E-00
gear pump mechanical seal A108-45
relief valve HGPCV-02-B30
Servo valve D671-0068-0001
differential hydraulic accumulator LNXQ-AB-80/10 FY
liquid stop valve WJ25F-16P
Welding type corrugated pipe globe valve WJ10F1.6P-II
solenoid valve working J-220VDC-DN6-Y/20E/2AL
Pressure relief valve YSF9-55/80DKJTHB
RUBBER BLADDER NXQA-1.6/20-L-A
3v solenoid SV13-12V-0-0-00
trip solenoid valve 4WE6D62/EW230N9K4