AS-C319 Single Cartridge Mechanical Seal

Background Knowledge：

What is the sealing face width of the mechanical seal

The sealing face width of the mechanical seal is also an important macro-geometric parameter. The frictional heat generated when the sealing end face is working is related to its width. If the sealing surface is too wide, the heat generated during friction will increase, which will increase the temperature rise of the sealing surface; if the sealing surface is too narrow, the contact specific pressure of the sealing surface will increase, which will increase the wear of the end surface and increase the leakage. Therefore, it is necessary to comprehensively consider various factors to select the appropriate sealing surface width.

In the initial selection of the sealing surface width 6, the sealing surface width of the wet-running mechanical seal can be selected based on experience：

B=0.0025+0.022d，d——shaft size，mm

The formula calculation results should be applied to the general rings, plus 0.015d for the wider rings  and minus 0.015d for the narrower rings. Finally, the size of the contact pressure of the sealing surfaces and the load factor K (area ratio B) should be considered comprehensively. The hardness of the stationary seat and rotary face materials that make up the sealing end faces is generally different. In order to prevent the harder ring from being embedded in the softer ring, the width of the sealing surface of the softer ring is usually narrower than that of the harder ring. Generally, the shaft diameter of the seal pair is φ15~200mm, and the width difference is 1~4mm. For sealing rings with poor thermal conductivity, the width should be narrower to facilitate heat dissipation.