Pressing Onward: A Dewatering Blog

When To Replace Filter Cloth Gaskets & How To Do It

By Michael Stock


Filter cloth gaskets are one of the parts that are crucial to the operation of many filter presses. As with all OEM parts, they do have a limited lifespan that depends on a variety of factors including:

  • Length of filtration cycle
  • Temperature of slurry being dewatered
  • The force put on them when a press closes

Read on to learn some of the warning signs that your gaskets need to be replaced (and a few insider tips for installing them).


When to Change the Gaskets on Filter Plates

First and foremost, gaskets NEED to be replaced if you notice any of the following:

  • The gasket appears to be delaminating.
  • The gasket is breaking down and shredding into small particles.
  • Your filter press is leaking even though it has proper hydraulic pressure.

Even if you aren't experiencing any major maintenance issues, we still recommend replacing your gaskets whenever you replace your filter cloths. Depending on your dewatering process and the type of slurry you are dealing with, filter cloths might need to be changed once every 6 months or once every 5 years.


How to Install New Gaskets

Installing new gaskets can be an easy process if you follow these steps:

  1. Starting at the bottom center of the filter plate, insert the new gasket using a wooden or plastic mallet.
  2. Push the gasket into the groove around the outer edge of the plate.
  3. Cut the gasket approximately 1/2" (12mm) to 1" (25mm) longer than required, cutting the end squarely.
  4. Apply one or two drops of Eastman 910 (or equivalent "super glue") to one end of the gasket and quickly join it to the other end.
  5. Hold for approximately 30 seconds.
  6. Push the excess gasket into the groove.

You might notice that the new gasket material is slightly sticky or gummy and the gaskets pull out of the grooves when the plates are separated. Don't worry, this situation can be easily remedied by applying a silicone spray to the plates to prevent them from sticking.

For more maintenance tips and tricks,  download our guide!

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