Coking radiation pump seal oil
Thread Content
During one startup procedure, the operators noticed that the seal oil pipelines before and after pump P1102A were cold. The pressure gauges measuring the seal oil pressure supplied to both pumps showed normal values, and the differential pressure across the seal oil filter of the radial pump was also normal; the filter in use was likewise cold. As a corrective action, the seal oil filter of the radial pump was replaced, but the seal oil pipelines remained cold. Upon cleaning the filter before replacement, it was found to be clean. What should be done next to determine the cause?
For the fully open oil injection valve, once the sealing oil pressure before the pump rises to balance with the main pipe pressure (above 0.8 MPa), it remains difficult to inject sealing oil at the low-pressure end; therefore, the seal at the low-pressure end and the sealing oil injection pipeline need to be checked.
If the seal oil has a high freezing point, is it because too little of it was used, causing blockage?
If it gets blocked, the differential pressure will become abnormal. Strangely enough, the differential pressure is normal, and the pressure gauges on the upstream and downstream sides are also normal
Is it confirmed that the oil seal is unobstructed? Heat up the seal oil and touch the oil injection pipe; the area where the temperature drops significantly is the one with the problem.