We have installed the diaphragm compressor, model number: PDC-2-6000 since 1999 to supply the hydrogen gas to our pilot plant for hydro-treating and hydrocracking processes. The compressor has been supplying 240 bar of hydrogen gas 24 hours per day without much of problem.
So far, this compressor does not need much of maintenance except changing and topping up the hydraulic oil. Once a while, the drive belt will become loose and require to be tightened. The only concern that we have is the huge consumption of water as cooling medium and this has increased our operating cost.
Overall, we are quite satisfied with this hydrogen compressor.