I have a failure of insulation between busbars (415V 3 phase, 150mm separation) supported on edge of glass mat re-inforced polyester sheet insulation (20mm thick). Laminate should be dry but may have intermittent condensation and located at coast but inside cabinet, inside building. About 15...
We have a case of a thin rubber (HNBR ~ 1-2mm) diaphragm in a high pressure CO2 valve failing. It had cracked completely round the flange plus part thickness crack around central support plus a few smaller concentric cracks. It is not ozone cracking. We suspect valve may get cold under some...
