Troubleshooting of Paper Machine Vacuum Systems, 2001 Papermakers Conference Proceedings
All wet-laid process paper machines have vacuum systems and, generally, these operate without frequent problems. However, when difficulties occur within the vacuum system, it may be difficult to identify the actual problem or cause. Often, the symptoms get treated rather than the actual problem. This troubleshooting guide should assist mill maintenance and production personnel in quickly determining the causes of vacuum system problems, and identify the differences between vacuum pump problems and those external to the pump(s).
A few system problems occur more frequently, so these will be covered. When troubleshooting vacuum systems or any operating problem, good techniques must be applied and questions must be asked. This includes, "What changed, and when?" and "Is this a problem or a symptom?"
The vacuum system problems to be discussed are:
* Low vacuum
* High horsepower - motor trip outs
* Hot pump operation
* Pump vibration
Troubleshooting of Paper Machine Vacuum Systems, 2001 Papermakers Conference Proceedings