Any good ideas on what to do if the mechanical seal is leaking?
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The viscosity of the finished product is quite high, and the seal of the centrifugal pump keeps leaking. Is there any solution?
Introduce clean medium for flushing; if the medium must not be contaminated by other substances, consider using a leak-free pump
It is necessary to determine the cause of the leakage: whether it is wear of the sealing surface or insufficient compression. Generally, higher viscosity media require greater compression, and cemented carbide is used for the sealing surfaces. You need to specify what operating conditions and temperature levels are involved, so that we can conduct a detailed analysis. .
First, it is necessary to analyze the cause of the leakage, starting from three aspects: the mechanical seal itself, its installation, and the manufacturing processes
It is indeed necessary to consider the specific operating conditions and take measures such as flushing or increasing the compression rate. Additionally, it should be checked whether there are elastic elements involved (in cases where the medium is sticky); in such situations, a back-to-back double-end face seal or an external mechanical seal can be used as a solution.
Installation aspect: Is the compression amount of the mechanical seal adjusted properly? Are the shaft runout and axial movement of the shaft on which the mechanical seal is installed within the specified limits?； The mechanical seal itself: Whether the material selection for the rotating and stationary ring friction pairs is appropriate, and whether the configuration of the springs and compensation mechanisms is suitable ； Process operation mode: Is the mechanical seal flushing water in use? ； Whether the temperature, pressure, flow rate, etc. of the rinsing water meet the requirements.
Centrifugal pumps are not very suitable for high-viscosity materials, as they are prone to cavitation, which can lead to seal leakage