What details should be paid attention to in the oil seal

1. Preparations and precautions before starting
a. Comprehensively check whether the mechanical seal, as well as the installation of auxiliary devices and pipelines are complete, and whether they meet the technical requirements.
b. Before starting the mechanical seal, perform a static pressure test to check whether there is leakage of the mechanical seal. If there are too many leaks, the cause should be found out and tried to eliminate. If the Dongguan oil seal is still invalid, it should be disassembled, checked and reinstalled. The general static pressure test pressure is 2~3 kg/cm².
c. Press the pump to turn the steering wheel to check whether it is light and even. If the cranking is difficult or does not move, check whether the assembly size is wrong and whether the installation is reasonable.
2. Installation and shutdown
a. The sealed cavity should be kept filled with liquid before starting. When conveying solidified media, the sealed cavity should be heated with steam to melt the media. The crank must be cranked before starting to prevent the soft ring from breaking due to sudden start.
b. For the mechanical seal using the pump external sealing oil system, the Dongguan oil sealing system should be started first. Finally stop the oil sealing system after parking.
c. After the hot oil pump is out of operation, the cooling water in the sealing oil cavity and the end face seal cannot be stopped immediately. The cooling water can only be stopped when the oil temperature at the end face seal drops below 80 degrees, so as to avoid damage to the sealing parts.
3. Operation
a. If there is slight leakage after the pump is started, observe it for a period of time. If the leakage is still not reduced after continuous operation for 4 hours, the pump should be stopped for inspection.
b. The operating pressure of the pump should be stable, and the pressure fluctuation should not be greater than 1 kg/cm2.
c. During the operation of the pump, the oil seal should avoid the phenomenon of evacuation, so as to avoid dry friction of the sealing surface and seal damage.
d. The sealing condition should be checked frequently. During operation, when the leakage exceeds the standard, the heavy oil is not more than 5 drops/min, and the light oil is not more than 10/min. If there is no improvement trend within 2-3 days, the pump should be stopped to check the sealing device.