Reduce Filter Press Capacity Using a Back Up Filter Plate

Why would I run a shorter filter press cycle?

If the slurry batch being fed to your filter press varies, you may need to shorten your plate stack. This will allow the filter press to run at reduced capacity and will shorten your press cycle.

What’s a back up filter plate?

A blanking or back up filter plate is a solid backing plate that provides structural support for the tail plate so it can be inserted at any position in the plate stack to isolate the chambers between the tail plate and the manifold end of the filter press.

Back up/ Blanking Filter Plate
Back Up / Blanking Filter Plate

Why do I need a back up plate? Can’t I just move my tail plate?

No! The back up plate is a solid plate made of polypropylene that provides support for the web of the recessed chamber in the tail plate so it does not deform into the recess of another filter plate. If you move your tail plate without a back up plate for support you run the risk of damaging your plate stack. Replacing filter plates is expensive.

Intermediate Filter Plate, Tail Filter Plate, Back Up Filter Plate
Intermediate, Tail, and Back Up Plates

Video: How-to reduce your filter press capacity using a back up plate


1. If you shorten your filter plate stack it is crucial to note proper 1-3 plate sequence.

2. Our tail plate is a #3 so to shorten the stack it must replace another #3 plate.

Filter Press Full Capacity
Filter Press Full Capacity

3. To shorten the plate stack:

A) Open the filter press and then remove the tail plate and the back up plate; set aside.

B) Slide plates back toward the follower to the desired capacity.

C) Replace an appropriate plate within the stack with the tail plate. (If your tail plate is a #3, you should replace a #3 filter plate.)

Reducing Filter Press Capacity
Reducing Filter Press Capacity

D) When you close your filter press, you will be operating at reduced capacity.

filter press reduced capacity
filter press reduced capacity

4. You can move your tail plate up the stack as far as you would like. If you are running a test, you can bring the press all the way down to one chamber.

5. No matter where you move your tail plate within the plate stack, always place your back up plate after the tail plate in the sequence or you are running the risk of damaging your tail plate.

6. To run at full capacity, move the tail plate and the back up plate back to their original positions and close the press.

Please let us know if you have any questions by leaving a comment (we check them everyday) or by contacting us.

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