How to Determine the Size of Filter Press Needed for your Application

Filter Press: 800mm Filter Press With Semi-Automatic Plate Shifter, Air Hydraulics

Over the history of commercial businesses and municipalities utilizing filter presses for a multitude of applications, two basic and reliable mathematical formulas have been developed to cover most situations.

The first formula covers most “standard” slurries. The second formula covers slurries composed of metal hydroxides, which are often found in wastewater from metal plating and finishing operations.

Filter Press Sizing Formulas



Our goal at M.W. Watermark™ is to help our customers make the most informed equipment and equipment sizing decisions possible.

Our team’s many years of experience across a wide variety of filter press applications provides a knowledge base that serves our customers well.

Feel free to contact us at any time to discuss your particular solid-liquid project.

Please work to obtain in advance as much of the information as possible outlined below. If one or more criteria are not available, our technicians can test a sample of the slurry, and/or use some standard data. (See Laboratory Testing section below for more information).

Information Needed to Size and Quote a Filter Press

• Type of slurry to be processed

• Amount of slurry to be processed in a given amount of time expressed in either:
—Gallons per minute, per hour, per day or per week
—Pounds of solids (100% dry basis) per time period

• Number of hours per day, and days per week the process operates

• Percent solids (by weight) in slurry

• Specific gravity of slurry (if available)

• Process operating temperature

• Density of wet filter cake

• Chemical conditioning amounts, if required (D.E., etc.)

• Press location: Indoor or outdoor, temperature range

• Desired cake thickness (std. is 32mm – 1 1/4”)

• Desired closure & control automation (Specify: Manual, Semi-Automatic or Automatic)

• Other (Please specify optional features required)

Laboratory Testing

M.W. Watermark maintains an in-house laboratory for determining the most effective equipment, equipment sizing, filtration media and dewatering techniques for your specific application.

After treatment, we can return to you the clean water (filtrate) and filter cake, along with an analytical report of our findings.

Our services range from feasibility testing of your materials to providing small portable pilot filter press units for on-site testing.

Filter Press: 250mm Portable Pilot Filter Press; Bench Top Filter Press
250mm Pilot Filter Press
Filter Press: 320mm Pilot Filter Press
320mm Pilot Filter Press

Contact us today to discuss the details of your solid-liquid separation project.

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