Analysis of the reasons for the detachment of the valve spool in the refrigeration compressor oil return valve
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A couple of days ago, during operation of the refrigeration compressor (model 8S-12.5) in the unit’s refrigeration workshop, the valve element of the oil return valve located behind the oil-gas separator suddenly came off entirely, resulting in the leakage of refrigeration oil and ammonia. A post-incident investigation revealed that the operator did not operate the return valve; the compressor operated with very little vibration, and the threads of the detached valve element were intact. The cause of the valve core falling off cannot be determined. Therefore, I ask the netizens on the forum to help analyze it.
The operator said they hadn’t touched it, so I believe that too. 200 pinholes are installed in the device to see how many mistakes occur each day. It’s really difficult to carry out chemical production these days, as the skill levels of operators vary greatly. To ensure stable and efficient operation, it’s first necessary to provide proper training for employees, followed by strict evaluation. Why are there so many unsolved cases within these facilities, that is, accidents with unknown causes? There is nothing in this world that happens without a reason. Since we often hold people accountable for mistakes, many truths never come to light. Once our management improves and our systems become more rational, many accidents will cease to occur.