After two months of unscheduled downtime, the customer asked our Customer Support team for support during compressor startup. Depending on the system and the local circumstances, this type of support is done on site or via remote access.
The startup of the K12 Hyper compressor in LDPE service ran smoothly and was continuosly monitored with PROGNOST®-NT. In case of problems during such a startup, minor things can be observed very closely. The picture above shows the online signal of one of the 2nd cylinders, where the plunger displacement at BDC (Bottom Dead Center) is slightly increased. In many cases, this is an indication that one of the high pressure packing rings has a slightly higher temperature. This is probably caused through polymersation inside of the high pressure packing.