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Normal operation and maintenance of mechanical seals
- Jul 06, 2018 -

1. Mechanical seals before the start of the preparatory work and precautions

(1) Comprehensive inspection of mechanical seals, as well as ancillary equipment and pipeline installation is complete, whether meet the technical requirements.

(2) Mechanical seals before the start of the static pressure test to check whether the mechanical seal leakage phenomenon. If leakage is more, should find out the reason to try to eliminate. If it is still not valid, you should remove the check and reinstall it. General static pressure test pressure with 2~3 kg/cm.

(3) According to the pump rotation to the car, check whether light evenly. If the car is struggling or not moving, you should check the assembly size is wrong, installation is reasonable.

2. Mechanical seal installation and outage

(1) The seal chamber should be filled with liquid before starting. For the transport of solidified media, the use of steam to heat the sealing chamber to melt the medium. The car must be parked before starting to prevent the soft ring from breaking up suddenly.

(2) for the use of the pump outside the sealing system of mechanical seals, should start the seal oil system. Stop the oil seal system at the end of the stop.

(3) The hot oil pump after the shutdown can not immediately stop sealing the oil cavity and end of the cooling water, should be sealed at the end of the oil temperature down to 80 degrees below, can stop cooling water, so as to avoid damage to seal parts.

3. Mechanical seal operation

(1) If there is a slight leakage after the pump starts, it should be observed for some time. If the continuous operation of 4 hours, leakage is still not reduced, you should stop pump inspection.

(2) Pump operating pressure should be smooth, pressure fluctuation is not less than 1 kg/square centimeter.

(3) Pump in operation, should avoid the occurrence of the phenomenon, so as to avoid the sealing surface of dry friction and seal damage.

(4) The sealing condition should be checked frequently.

In operation, when its leakage exceeds the standard, the heavy oil is not more than 5 drops/min, light oil is not greater than 10/min, such as 2-3 days there is no improvement trend, it should stop pump bolt check sealing device.