The mechanical Sealing Face consists of two identical metal seal rings that are fixed in two separate housings. The sealing faces of each ring have a lapped surface. The metal rings are centered in their respective housings by an elastomeric element. In this way, one half of the seal remains static in the housing while the other half rotates with the counter face.
When designing the seal face, it is important to select a material that is compatible with the sealing fluid and the temperature produced by the seal. The axial thickness of the seal face is usually one-half of its original height. This is to minimize the friction between the two faces. A face seal with a low coefficient of friction is likely to perform well under high temperatures.
In addition to the seal face, an end-face mechanical seal may have several sealing faces, including end-face mechanical seals. These faces can be configured in various directions, including Face-to-Face, Face-to-Back, or Back-to-Back. These faces may be pressurized or unpressurized.
The metal ring of a mechanical face seal is typically made of cast iron or bearing steel. Some manufacturers use a new spring steel called Nexus, which is more resistant to corrosion and wear. This material is especially useful for heavy mud environments. It is also suitable for construction equipment due to its higher flexibility against mud packing. And in some cases, it is made of a combination of steel and carbon graphite.
In some industries, such as agriculture and construction, technology is playing a larger role. OEMs are developing equipment to suit the needs of different terrains. In these industries, mechanical face seals play a vital role, as they must withstand rough terrain and extreme temperatures. Consequently, they are crucial to the long-term performance of heavy equipment.
Mechanical seals are one of the most versatile types of rotating shaft seals. However, their life expectancy is unpredictable. A seal failure can lead to serious consequences, especially in critical applications. Therefore, methods of detecting unwanted contact have been developed.
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