Discussion on the issue of frequent leakage in mechanical seals
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Recently, the mechanical seals of the pumps have been leaking frequently: leaks occur after the pumps have been running for a short time, and leaks appear as soon as the standby pumps are started. This situation has happened on many occasions. The current analysis suggests that the high oil sealing temperature (110°C) is to blame; let’s discuss whether there could be other reasons as well
There might be an issue with the quality of the mechanical seal?
Check whether the oil quality has deteriorated, or whether its viscosity, impurities, etc. are above the specified limits
Your description of the mechanical seal leakage is too simplistic. Does your seal oil system not have a cooler? We have not encountered any cases of seal leakage caused by an excessively high oil sealing temperature. . The sealing quality and installation issues have been ruled out?
Send over the mechanical seal structure. If the flushing temperature is 110, leakage is indeed likely to occur; such a high temperature prevents an effective liquid film from being formed between the rotating and stationary rings. It’s possible to use 21 or 23 for flushing
It would be best to upload a picture so that the cause can be analyzed.
The circulating water pressure in our system is too high, causing the mechanical seals of several pumps to leak
First of all, you need to understand the functions of sealing, dear friends. Its functions include cooling, lubrication, sealing, shock absorption, flushing, protection, and more – these are the key aspects to consider.
Is the mechanical seal undamaged? There are many reasons that can cause leakage in a mechanical seal: the material of the O-ring, the materials of the rotating and stationary rings, the nature of the medium, and the degree of compression. . .
Whether the machine seal structure and friction pair are suitable for the working medium
A cooler has been added to the seal oil system, reducing the seal oil temperature to 90°C; currently, the leakage from the mechanical seal has decreased significantly.