Normal operation and maintenance of mechanical seal problems

 1, the mechanical seal before the start of the preparatory work and notes

 a. comprehensive inspection of mechanical seals and ancillary equipment and piping installation is complete, compliance with technical requirements.

 b. before the start of mechanical seals for static pressure test, check whether the mechanical seal leakage. If the leak more, should find out the reason for trying to eliminate. If still ineffective, should be demolished and re-check the installation. General static test pressure for 2 to 3 kg / square centimeter.

 c. rotation by turning the pump, check whether the light evenly. Such as turning difficult or does not move when the assembly should check whether the size error, the installation is reasonable.

 2, mechanical seal installation and decommissioning

 a. before the start of the mechanical seal shall remain sealed cavity filled with liquid. Solidification of the medium for transmission, the application will be sealed vapor chamber heat to medium melt. Start before turning to prevent a sudden start caused by soft ring fragmentation.

 b. For use outside the seal oil system pump mechanical seal, seal oil system should be launched. After stopping the last stop the seal oil system.

 c. heat pump can not immediately stop after the outage seal oil and seal chamber cooling water, wait until the seal at the oil temperature drops below 80 degrees, it can stop the cooling water to avoid damage to the mechanical seal parts.

 3, the operation of mechanical seals

 a. If the pump starts minor leakage should be observed for some time. 4 hours continuous operation, such as, leakage is still not reduced, they should check the pump stops.

 b. the operation of the pump pressure should be stable, the pressure fluctuation is less than 1 kg / square centimeter.

 c. pump in operation, should avoid taking the time to the phenomenon of dry friction in order to avoid sealing surface and seal damage.

 d. Always check the mechanical seal condition. Operation, when the leakage exceeds the standard, heavy oil is not more than 5 drops / min, light oil is not more than 10 drops / min, such as 2-3 days, still no signs of improvement, you should stop the pump mechanical seal inspection bolt .