Paper Mill Machinery Vacuum Couch Roll Troubleshooting
The vacuum couch roll is a vital part of the paper making machine. It pulls water from the paper web and moves the sheet forward. However, many mills face problems with the vacuum couch roll. The most common issue is low vacuum even when the pump is running. This lowers the paper dryness and causes sheet breaks. Another problem is a “fake high” vacuum. The gauge looks normal, but the paper is still too wet because the holes on the vacuum couch roll are blocked. Also, if the vacuum is too strong, the edges of the paper can drop and break. These issues mean your vacuum couch roll is not working well.
To fix these problems with your vacuum couch roll, you need to check the whole system step by step. First, check the pump side, like the water pressure and temperature. Second, check the pipes for air leaks and tighten all connections. Third, check the inside of the vacuum couch roll. Small fibers and glue can block the holes. You must set up a strict high-pressure washing rule. When you clean the vacuum couch roll, always use a filter before the water nozzle. If the paper edges drop, do not increase the vacuum. Instead, check the forming and dewatering parts. The table below shows the key data for cleaning and checking your vacuum couch roll:
| Item | Specification |
|---|---|
| High-Pressure Washing Water | ≥ 20 kg |
| Washing Time | ≥ 30 minutes |
| Filter Installation | Required before the nozzle |
| Main Problem 1 | Pipe air leaks or bad seal water |
| Main Problem 2 | Blocked holes on the roll shell |
| Main Problem 3 | Edge drop from too much vacuum |
We offer this high-quality vacuum couch roll and other paper mill machinery. Our vacuum couch roll is built for stable suction and easy maintenance. We supply complete paper production lines for different paper grades. We also provide turnkey paper production line services. If you need a reliable vacuum couch roll for your paper making machine, we can help. Contact us for more information.
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