Mechanical seal is also called end face seal. With the force from spring and sealing medium, it adds an appropriate amount of pressure on the contact surface between the rotating dynamic ring and the static ring the make their end faces touch each other closely.
A very thin layer of oil film is kept between the end faces. The medium will confront large resistance force when it passes through, which prevent leakage of fluids, achieving the effects of sealing. Meanwhile, this thin film also lubricates the dynamic ring and static ring.
If adjusted well, leakage can be prevented completely.
1. Features of submersible well pumps’ mechanical seal
The main advantage of the mechanical seal of submersible well pumps is reliable sealing. It rarely leaks in a very long period of operation. Its service life is long, generally 5 years on average, which also suggests a long maintenance period.
But mechanical seal has complex structure. It is manufactured and installed with high precision. It needs the maintenance personnel to be highly skillful. As the mechanical seal on oil delivery pipe is built-in type, we often need to dismantle the oil pump when maintaining the mechanical seal, which takes a large amount of work.
Therefore, it is of great importance to ensure reliable operation of the mechanical seal, and prolong the service life of mechanical seal.
2. Common problems of mechanical seal of the submersible well pumps
During operation, the main possible problems of mechanical seal are excessive amount of leakage and excess temperature.
Touch the gland of the mechanical seal with hand. If you cannot keep your hand on it for a moment, it indicates excess temperature.
The amount of leakage should not be more than 60 drops per minute. If the drops are in a line, it signifies excessive amount of leakage. If the seal ejects oil outward, you should stop the submersible well pumps at once for inspection.
For more information, please contact info@welpump.com
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