Within only 2 weeks, 113 units ball valves and actuators (including some valves of other makes) - 73 of which were 42" & 30" G-type valves - were completely overhauled and our actuators were "put through their paces", hydraulic oil was replaced and, if necessary, the smaller leaks in the fittings fixed with flushing and grease injection, etc.

This was done shortly before and during the Easter vacations after the line had been pigged beforehand and in between also the 3 compressor stations were shut down for a short time (max 4 days). In this narrow time window all parts had to be checked and made ready for operation again. Therefore, four crews were set up to work at 4 different workplaces at once and under very tight coordination to carry out the various interventions - very often from early in the morning before sunrise until late at night.

Furthermore, the signal connections to the remote control station were also checked for proper functioning and, as required, the safety functions (detailed knowledge of the instrumentation is also required here).