{"id":4580,"date":"2020-06-23T13:55:43","date_gmt":"2020-06-23T11:55:43","guid":{"rendered":"https:\/\/blog.febi.com\/?p=4580"},"modified":"2020-06-23T13:55:45","modified_gmt":"2020-06-23T11:55:45","slug":"slide-seal-ring-for-the-water-pump-small-part-great-importance","status":"publish","type":"post","link":"https:\/\/blog.febi.com\/en\/slide-seal-ring-for-the-water-pump-small-part-great-importance\/","title":{"rendered":"Slide Seal Ring for the Water Pump \u2013 Small Part; Great Importance"},"content":{"rendered":"\n

Modern\ncommercial vehicle engines must work efficiently. More power and fewer\nemissions is the name of the game. In terms of design, however, the performance\nlimits of the materials that are used are reached. Pressures and temperatures\nin the engine can reach high values. As a result, modern engines must be cooled\ndown more efficiently. This function is performed by the cooling system \u2013\nespecially the water pump.<\/p>\n\n\n\n


Besides the bearing package, the most important and most sensitive component is also the smallest. We are talking about the slide seal ring, which cannot be seen from the outside, but whose filigree technology deserves closer examination. The slide seal ring is located on the water pump shaft and serves as a seal between the water pump bearing and the coolant.<\/p>\n\n\n\n

Qualitative Differences <\/strong><\/h2>\n\n\n\n

It consists\nof many parts, some of them rotating, some standing. Sealing is ensured by\nsliding the sealing surfaces of both rings (sliding ring and counter ring)\nagainst each other under the pressure of a spring. The seal ring pairs are made\nof high-quality and wear-resistant materials such as silicon, graphite, or\nceramics. If savings are made in regard to the quality of materials, the life\nexpectancy of the mechanical seal is considerably shorter. This is also one\nreason why water pumps can be similar in appearance, but very different in\nquality.<\/p>\n\n\n\n

In order to\nensure that the mechanical seal functions continuously throughout its entire\nservice life, constant lubrication and cooling between the two rings is\nnecessary. This is achieved by means of a lubricating film which forms between\nthe two pairs of slide seals during rotation. This lubricating film of 1-2 \u03bcm\nshould always be there to reduce friction and dissipate heat.<\/p>\n\n\n\n

Leaks Can Be Normal <\/strong><\/h2>\n\n\n\n

It is\nnormal for a certain amount of leakage to escape between the seal ring and the\ncounter ring. However, this is very small and can still evaporate in the pump.\nSome coolant can also enter the free space behind the slide seal ring and exit\nat the drainage hole. This is normal in small quantities, especially after\ninitial assembly, and does not constitute a reason for complaint. Some pumps\nare equipped with small evaporation containers where the coolant is collected\nand held in the pump until it has evaporated.<\/p>\n\n\n\n

A permanent\ncoolant leakage at the leakage hole, on the other hand, is a sign of a\ndefective slide seal ring and thus a leaking water pump.<\/p>\n