【Seeking help with diaphragm compressor issues】

Thread Content

Hello, fellow sailors! I’m currently facing a difficult problem to solve. There are several diaphragm compressors GD4-2900/45-120 made by Beijing Zhongding in the unit, used for producing hydrogen. In one of these compressors, there was a problem of a large pressure difference between the gas side and the oil side: when the pressure on the gas side reached around 100 kilograms, it was 180 kilograms on the oil side. This caused cylinder slapping. The oil was heated electrically; the pilot valve attached to the cylinder head was replaced, and checks were carried out on the check valves, piston pumps, piston rings, and cylinder liners – all of which appeared to be in good condition. The diaphragm and the inlet/outlet valves were also replaced, after which the manual pressure control valve from before the modification was put back in place. Yet, cylinder slapping continued to occur even after the system was pressurized during testing. I really don’t know what the reason is. I would appreciate it if some experienced sailors could help analyze what might be causing this issue ? ?