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Pump Seal Installation Steps
May 15, 2017


Water pump seal leakage failure is one of the most prone to failure in the pump failure, so the pump mechanical seal is also part of the water pump components in the more vulnerable parts of the pump when the mechanical seal material must be suitable Pump Seal for the user to transport the liquid medium。

Water pump sealing steps / methods

1 pump seal leakage of the first possibility is the mechanical seal of the static and static ring plane wear. And cause the mechanical seal, static ring plane wear causes there are six aspects:

2 installed too tight. Observe the mechanical seal of the static and dynamic ring plane, if serious burning phenomenon, black and deep traces of the plane, sealed rubber hardened, loss of flexibility, this phenomenon is due to the installation of tight caused. Treatment: adjust the installation height, the impeller installed, with a screwdriver to pull the spring, the spring has a strong tension, loose after the complex λ, 2-4MM can move the distance.

3 installed too loose. Observation machine sealing, static ring plane, the surface of a layer of very thin scale, can wipe, the surface of the basic no wear, which is the spring loss of elasticity and poor assembly caused by, or motor axial movement caused.

4 poor water quality particles. Due to poor water quality, containing small particles and medium in the high content of hydrochloric acid, the formation of abrasive wear machine seal surface or tensile surface to produce grooves, ring groove and so on. Treatment: to improve water pressure or media, replace the machine seal.

5 dry running caused dry grinding damage. This phenomenon is more common in the bottom of the valve-type installation of the Pump Seal form of negative pressure at the inlet, the inlet pipe with air, the pump cavity with air, pump boot, the machine seal friction high-speed operation, can not get cooling, check the machine seal, spring tension normal , Friction surface burning black, rubber hard cracking. Treatment: exhaust pipe and pump chamber air, replace the mechanical seal.

6 cavitation. Cavitation is mainly produced in hot water pumps. As the medium is hot water, the water temperature is too high to produce steam, the steam within the pipeline into the pump chamber height, this part of the vapor can not be ruled out, resulting in water shortage, mechanical dry grinding failure, Valve, replace the machine seal.

Mechanical seal at the infiltration of the first possibility of water is the mechanical seal, static ring plane wear. And cause the mechanical seal, static ring plane wear causes there are six aspects:

Cause one, the installation is too tight. Observe the mechanical seal of the static and dynamic ring plane, if serious Pump Seal burning phenomenon, black and deep traces of the plane, sealed rubber hardened, loss of flexibility, this phenomenon is due to the installation of tight caused.

Treatment: adjust the installation height, the impeller after the installation, with a screwdriver to pull the spring, the spring has a strong tension, loose after the complex λ, there are 24MM mobile distance can be.

Cause two, the installation is too loose. Observation machine sealing, static ring plane, the surface of a layer of very thin scale, can wipe, the surface of the basic no wear, which is the spring loss of elasticity and poor assembly caused by, or motor axial movement caused.

Reason three, poor water quality with particles. Due to poor water quality, containing small particles and medium in the high Pump Seal content of hydrochloric acid, the formation of abrasive wear machine seal surface or tensile surface to produce grooves, ring groove and so on.

Treatment: to improve water pressure or media, replace the machine seal.

Cause four, dry running caused dry grinding damage. This phenomenon is more common in the bottom of the valve-type installation of the form of negative pressure at the inlet, the inlet pipe with air, the pump cavity with air, pump boot, the machine seal friction high-speed operation, can not get cooling, check the machine seal, spring tension normal , Friction surface burning black, rubber hard cracking. Treatment: exhaust pipe and pump chamber air, replace the mechanical seal.

Cause five, cavitation. Cavitation is mainly produced in hot water pumps. As the medium is hot water, the water temperature is too high to produce steam, the steam within the pipeline into the pump chamber height, this part of the vapor can not be ruled out, resulting in water shortage, mechanical dry grinding failure, Valve, replace the machine seal.

Reason Six, the assembly problem. When installing the pump cover, it may be flattened, resulting in the axis and the pump cover is not perpendicular to the movement plane can not match, boot time is not long, resulting in unilateral wear and water seepage. It is also possible to damage the rubber parts when the static and dynamic rings are installed, or the surface of the ring.

Remedy: Remove the heavy equipment, check the pump cover is flat.