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FREQUENTLY ASKED QUESTIONS ABOUT JWI FILTER PRESSES

What is a filter press? What can it do for your dewatering process? How can it save you money? What if you need one right away? This page will answer these and many more questions about filter presses, and how Evoqua can help you.

Below you will find answers to our most frequently asked questions. They are divided into common categories: Process, Operation and Maintenance. The most-asked question is usually: What is a filter press?

Scroll down to find the section appropriate to your needs. For questions related to your specific application, please call our professional service staff at 1.800.245.3006.

​Read our blog on dewatering - Pressing Onward

Join us each week as we offer tips, tricks and other great info on how to make the most of your filter press equipment.

How can you tell if your filter press needs service? How do you know which parts to order? How should you adjust your press for specific applications? Or...how can you determine what type of press to get in the first place?

Our blog is designed to answer all of those questions, so please read Pressing Onward and learn more!

 Operation

13. How many more plates can I add to my press?

14. How many plates can I take out of my press?

15. How do I adjust my hydraulic closing pressure on my press?

It depends on the age and model of your hydraulic system. Consult your O&M manual or call customer service at 800.245.3006.

16. Can I feed at 125 psi on my 100-psi press?

17. What is the flow rate I can get through my press?


It depends on your process but averages between 0.02 and 0.1 gallons per minute per square foot of filtration area. The flow rate is not constant

18. What flow rate do I need to precoat my filter press?

A general rule of thumb is 0.25 gallons per minute per square foot of filtration area.

19. How do I precoat my press?

20. Why are my sidebars bowing?

21. Why is my press squirting out from between the plates during feed?

22. Why won't my press build/hold hydraulic pressure?


23. Why is my press leaking hydraulic oil? (VIDEO)

24. How do I install a gasketed filter cloth on my gasketed filter plate? (VIDEO)

25. How do I change the oil on my filter press? (VIDEO)

26. How do i install a non-gasketed filter cloth on my non-gaseketed filter plate? (VIDEO)

 

 Maintenance

24. How can I tell when my filter cloths are dirty?
Usually you will need a longer cycle time to achieve the same cake dryness. You may also notice sloppy cake or discharge flow is less.

25. How do I clean my filter ​cloths?

26. How long do cloths last?

27. How do I change my cloths?

28. How do I change the filter cloth on the gasketed tail plate of my filter press? (VIDEO)

29. How do I change the filter cloth on the gasketed head plate of my filter press? (VIDEO)

30. When should I change my gaskets?

31. How do I change my gaskets?


32. How do I change my center feed pipe assembly?

33. How often should I change the oil in my hydraulic system? (VIDEO)

34. How often should I change the hydraulic filter?

 Whenever you change your oil, you should change your filter.

35. I don't have (or I lost) my Operation & Maintenance manual. Can I purchase another one?

36. Where do I find the serial number on my filter press?

 For further assistance and cloths, plates and all your parts needs, call our customer service department at 800-245-3006. Thank you.