Analysis of Typical Failure Causes of Mechanical Seal

(1) Problems with the mechanical seal itself

1. The mounting is not in place or is uneven.

2. The load coefficient is too large or the end face pressure design is unreasonable.

3. Improper material selection.

4. The sealing surface is uneven.

5. The sealing surface is too wide or too narrow.

(2) Auxiliary system problems

1. The working conditions are complex, but there are no auxiliary facilities such as flushing.

2. The flushing pipe is blocked.

3. The cooling tube is scaled.

(3) Media and working conditions issues

1. The medium is highly corrosive.

2. There are solid particles in the medium.

3. Evacuate the equipment.

4. The sealing surface crystallizes.

5. The viscosity of the medium is too high.

(4) Pump problems

1. The machining accuracy of the shaft is poor, the shaft is misaligned, the shaft is running out, and the installation gap is too large.

2. The pump vibrates too much after it is turned on.

3. The gland ring is poor.

4. The sealed box is uneven.

5. The mechanical seal installation does not achieve the required compression amount.