Water pump mechanical seal leakage failure is one of the most prone to failure of the pump failure, so the pump mechanical seal is also one of the more critical parts of the pump parts vulnerable, pump selection mechanical seal material must be suitable for user delivery Liquid medium, usually the pump factory is Viton mechanical seal Some manufacturers are nitrile rubber mechanical seal, if more corrosive was the choice of PTFE mechanical seal.
Steps / methods:
1, the first possibility of mechanical seal leakage at the machine seal, static plane wear. The mechanical seal caused by static and static plane wear for six reasons:
　　
2, the installation is too tight. Observe the static and dynamic ring plane of the mechanical seal. If there is serious burning phenomenon, the surface is black and deep, the seal rubber hardens and loses its elasticity. This phenomenon is caused by the tight installation. Approach: Adjust the installation height, the impeller is installed, pull the spring with a screwdriver, the spring has a strong tension, release immediately reset, there are 2-4MM mobile distance.
　　
3, the installation is too loose. Observer seal, static ring plane, the surface has a thin layer of scale, to wipe the surface of the basic wear and tear, which is caused by the loss of spring flexibility and poor assembly, or motor caused by the axial movement.
　　
4, poor water quality with particles. Due to poor water quality, containing small particles and medium hydrochloride content is high, the formation of abrasive wear seal plane or surface of the resulting groove, ring groove and so on. Approach: improve water pressure or medium, replace the machine seal.
　　
5, dry running damage caused by running water. This phenomenon is more common in the end of the valve installation form the entrance of negative pressure, air inlet pipe, the pump cavity with air, pump boot, machine seal friction high speed operation produces high temperature, can not be cooled, check machine seal, spring tension normal , The friction surface burns black, the rubber hardens and cracks. Approach: drain pipes and pump cavity air, replace the mechanical seal.
　　
6, cavitation. Cavitation is mainly caused by hot water pump. As the medium is hot water, the water temperature is too high to produce steam, the gas inside the pipe into the pump chamber height, this part of the gas can not be excluded, resulting in water running, machine seal dry failure, cavitation automatic loading Valve, replace the machine seal.
Steps / methods:
1, the first possibility of mechanical seal leakage at the machine seal, static plane wear. The mechanical seal caused by static and static plane wear for six reasons:
　　
2, the installation is too tight. Observe the static and dynamic ring plane of the mechanical seal. If there is serious burning phenomenon, the surface is black and deep, the seal rubber hardens and loses its elasticity. This phenomenon is caused by the tight installation. Approach: Adjust the installation height, the impeller is installed, pull the spring with a screwdriver, the spring has a strong tension, release immediately reset, there are 2-4MM mobile distance.
　　
3, the installation is too loose. Observer seal, static ring plane, the surface has a thin layer of scale, to wipe the surface of the basic wear and tear, which is caused by the loss of spring flexibility and poor assembly, or motor caused by the axial movement.
　　
4, poor water quality with particles. Due to poor water quality, containing small particles and medium hydrochloride content is high, the formation of abrasive wear seal plane or surface of the resulting groove, ring groove and so on. Approach: improve water pressure or medium, replace the machine seal.
　　
5, dry running damage caused by running water. This phenomenon is more common in the end of the valve installation form the entrance of negative pressure, air inlet pipe, the pump cavity with air, pump boot, machine seal friction high speed operation produces high temperature, can not be cooled, check machine seal, spring tension normal , The friction surface burns black, the rubber hardens and cracks. Approach: drain pipes and pump cavity air, replace the mechanical seal.
　　
6, cavitation. Cavitation is mainly caused by hot water pump. As the medium is hot water, the water temperature is too high to produce steam, the gas inside the pipe into the pump chamber height, this part of the gas can not be excluded, resulting in water running, machine seal dry failure, cavitation automatic loading Valve, replace the machine seal.
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