Maintenance of Mechanical Seals for Pumps

There are five main leakage points of mechanical seals for pumps:

(1) Seal between sleeve and shaft;

(2) Seal between dynamic ring and sleeve;

(3) Seal between dynamic and static rings;

(4) Seal between static ring and static ring seat;

(5) Seal between sealing end cover and pump body.

Generally speaking, leakage between the shaft extending from the sleeve and between the sealing end cover and pump body is easier to find and solve, but requires careful observation, especially when the working medium is liquefied gas or high pressure, toxic and harmful gas, which is relatively difficult. The rest of the leakage is difficult to distinguish and judge intuitively. It is necessary to observe, analyze and judge the leakage symptoms based on long-term management and maintenance practice to draw a correct conclusion.