How to maintain the mechanical seal?

How to maintain the mechanical seal?
Before the start of the preparatory work

1.A comprehensive inspection of mechanical seals, and attachment and pipeline installation is complete, whether it meets the technical requirements.

2.Mechanical seal before start static pressure test, check the mechanical seal for leaks. If the leak more, should find out the reasons to try to eliminate. If it is still invalid, it should be dismantled and reinstalled. General static pressure test with 2 to 3 kg / square centimeter.

3.Press the pump to the steering wheel, check whether the light and uniform. Such as crank difficult or fixed, you should check the assembly size is wrong, the installation is reasonable.

Installation and shutdown

1.Before starting the sealed chamber should be filled with liquid. For conveying solidified media, steam is used to heat the sealed chamber to melt the media. Must be turned before starting to prevent sudden start-up caused by the soft ring fragmentation.

2.For the use of pump seal oil system mechanical seal, seal oil system should be activated. After stopping the last stop oil seal system.

3.After the shutdown of the hot oil pump can not immediately stop sealing the oil chamber and the end seal of the cooling water, should be the end seal oil temperature dropped to 80 degrees below, you can stop the cooling water, so as not to damage the seal parts.


1.Pump if there is a slight leakage, should be observed for some time. Such as continuous operation for 4 hours, the amount of leakage is still not reduced, you should stop the pump check.

2.The pump operating pressure should be stable, the pressure fluctuations of not more than 1 kg / cm.

3.Pump operation, should avoid the phenomenon of taking the time to avoid sealing surface dry friction and seal damage.

4.Seal to be checked frequently. In operation, when its leakage exceeds the standard, heavy oil is not more than 5 drops / min, light oil is not more than 10 drops / min, if 2-3 days still no improvement trend, you should stop the pump to check the seal.

Next:Selection principle of mechanical seals