What precautions should be taken when installing the mechanical seal of a centrifugal pump?

It is recommended not to adjust the spring of the mechanical seal lightly. Also, during assembly, make sure that no foreign objects get into the sealing surface; then drop a few drops of engine oil and turn it gently so that an oil film forms on the sealing surface.

Make sure not to put it on backwards, okay?:victory::lol

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Constantly protect the contact surface between the rotating and stationary rings, and prevent any foreign objects from getting in

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Reply to 1# Yitailong’er: a. The diametral clearance between the gland and the sleeve is 0.75–1.00 mm; the thickness of the gasket between the gland and the seal chamber is 1–2 mm. b. The roughness of the contact area between the sealing gland and the static ring seal ring shall be Ra≯3.2. c. The shaft or sleeve at the location where the mechanical seal is installed must be free of defects such as rust spots or cracks, with a surface roughness of Ra≯1.6. d. An axial clearance of 1–2 mm should be maintained between the root of the anti-rotation groove at the tail end of the stationary ring and the top of the anti-rotation pin. e. The working length of the spring after compression shall meet the design requirements, with a deviation of ±2mm. f. The rotation direction of the mechanical seal ring spring should be opposite to that of the pump shaft. g. The gland bolts should be tightened evenly to prevent the gland face from tilting.

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Reply to 1# Yitailong: The cleanliness of the components is very important. Ensure that the rotating and stationary rings are installed without any skew, that the O-rings are in good condition, and that the spring compression level is set properly – that’s all there is to it