How to Order the Right Size Filter Cloths to Fit Your Filter Press

Outfitting your filter press with the correct filter cloths is essential for effective performance. The cloth itself plays a fundamental role in the filtration process, acting as the starting point of the filter cake that will eventually do most of the filtering. With that in mind, it’s crucial to determine your filter cloth’s needed size in order to make the most of your filter press.

M.W. Watermark Gasketed (CGR) Filter Cloth and Filter Plate
M.W. Watermark Gasketed (CGR) Filter Cloth and Filter Plate
M.W. Watermark Non-Gasketed (NG) Filter Cloth and Filter Plate
M.W. Watermark Non-Gasketed (NG) Filter Cloth and Filter Plate

Filter Cloth Templates Make Ordering Easy

M.W. Watermark manufactures a wide variety of filter cloths in order to address dewatering applications across many different industries. In addition to stocking standard offerings, we can custom-cut filter cloths to specifically accommodate the filter press you are using.

The process is simple. First, you fill out either our gasketed (CGR) or non-gasketed (NG) filter cloth template with the size requirements of your filter plates. Then, click the “Submit to M.W. Watermark” button at the bottom of the form.

You may also send your cloth specifications to M.W. Watermark by email to info@mwwatermark.com, and we will get started on the project ASAP in order to deliver your order in a timely manner. All of our filter clothes are manufactured in-house using laser-cutting tables and a veteran sewing staff to ensure consistent quality.

M.W. Watermark Manufactures Custom Filter Press Cloths In-House Using Laser Cutting Tables
M.W. Watermark Manufactures Custom Filter Press Cloths In-House Using Laser-Cutting Tables

What Are Your Options?

Besides ensuring that the dimensions of your filter cloths will fit the plates of your filter press, the filter cloth template forms also include a field for noting your preferred material. M.W. Watermark offers filter cloths constructed of several different fabrics, including polypropylene, polyester, cotton, nylon and felt.

Since the performance of filter cloth media is a function of fiber properties, fabric construction and finishes, we offer a variety of filter cloth types, including mono-filament, multi-filament and mono-multi cloth.

M.W. Watermark can also work with you to make a recommendation on the ideal filter cloths for your particular application by running tests in our dewaterability laboratory

Download our Filter Cloths Product Guide to learn more.

M.W. Watermark Manufactures Custom Filter Cloths for Your Filter Press

Place Your Filter Cloth Order

If you are in the market for custom-cut or standard filter cloths, look no further than M.W. Watermark. After determining your filter cloth’s size and material requirements, we will craft a product that’s appropriate for your equipment before shipping it directly.

To learn more about the filter cloth selection process or to place your order, contact us today.

About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2018 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

M.W. Watermark™ Continuous Sludge Dryers, Replacement Parts and Service

M.W. Watermark understands the importance of keeping downtime to a minimum. That’s why we stock replacement parts and offer maintenance and repair services for not only our own line of sludge dryers, but also for models from other suppliers.

Infrared Gas Burners

M.W. Watermark’s infrared gas burners are designed for efficient heating and long service life. We maintain a stock of other heating system parts like spark igniters, flame rods, thermocouples, air filters and many more for quick, easy replacement.

Contact M.W. Watermark to learn more about our replacement infrared gas burners for continuous sludge dryers. Please reference part number 40026750. The M.W. Watermark infrared gas burners are also identical and direct replacements for other brands of similar continuous sludge dryers.

M.W. Watermark Continuous Sludge Dryer Infrared Burners

Conveyor Belts

M.W. Watermark carries a large stock of stainless steel conveyor belts as well as custom drive sprockets, gearboxes, bearings and gears.

For replacement conveyor belts for M.W. Watermark Continuous Sludge Dryers, please reference the following part numbers:

-DM-200G, 20″ Wide Conveyor Belt  – 40023835

-DM-380G, 38″ Wide Conveyor Belt – 40000729

For conveyor belts and other parts for other manufacturers’ makes and models, please contact us for compatible sizes and part numbers. Our conveyor belts are direct replacements for other brands of similar continuous sludge dryers.

M.W. Watermark Continuous Sludge Dryer Conveyor Belts

The M.W. Watermark Continuous Sludge Dryer

The M.W. Watermark Continuous Sludge Dryer is designed to process metal hydroxide plating wastes, and when used in conjunction with a filter press, is used to further dry filter cakes and can bring them from approximately 30% solids up to potentially 75% solids*.

*Typical results. Actual results may vary.

Our sludge dryer features several improvements in efficiency and simplicity over other continuous dryers, with a drop-in footprint for compatibility and ease of installation.

M.W. Watermark Continuous Sludge Dryers

These improvements have been designed with our customers’ requirements in mind, and include the following:

  • User-friendly PLC with full-color touch screen and fault alarms
  • Standard stainless steel cake hopper
  • Easy external service access to high-temperature bearings
  • Over-sized extruder gearbox with AC drive and inverter duty motor
  • Powder coating of carbon steel components for resistance to corrosion
  • Durable stainless steel construction of all wetted components

M.W. Watermark Continuous Sludge Dryer Features

Our Continuous Sludge Dryer is Available in Two Sizes

The M.W. Watermark Continuous Sludge Dryer is available in two models to best fit your capacity needs: The DM-200G and the DM-380G.

At full capacity, the DM-200G can process up to three cubic feet of material in an hour, while the larger DM-380G can process double that, or up to six cubic feet.

Visit our Continuous Sludge Dryer product page to view additional specs or contact a member of our Sales and Service Team for a quote.

Be Our Guest at NASF SUR/FIN® in Cleveland, June 4-6

If you are in the metal plating / finishing business, you won’t want to miss this important industry trade show. NASF SUR/FIN is where leading surface technology companies connect, collaborate and contribute. It is the primary conference and trade show dedicated specifically to the surface technology industry.

M.W. Watermark invites you to join us at the NASF SUR/FIN show in Cleveland this year – with a free show floor admission!

Click here to learn more. We will be exhibiting in Booth #601. Hope to see you at the show!

M.W. Watermark will be exhibiting at NASF SUR/FIN 2018 in Booth #601

About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2018 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

Making a Difference in our Workplace with Energy Efficient Lighting

M.W. Watermark team members know that making a difference in the world starts close to home.

Each year, the Watermark leadership team sets enthusiastic goals for community outreach projects, charity work and fundraising. This year, staff members have stepped up to make suggestions on how we can also make a difference right here in our workplace. In fact, one of our engineers, Reed, was interested in researching what we could do to save energy in our daily operations.

Our shop is similar to many other manufacturers’ in the fact that we have multiple overhead light fixtures to ensure both a safe and productive work environment.

Reed put together a cost/benefit analysis for switching to LED lighting and presented it to the Watermark leadership team. After reviewing the costs, it was determined that switching to LED bulbs would use only half the electricity and would pay-back in about 6 months.

Based on this proposal, M.W. Watermark decided to move forward with Reed’s suggestion for installing new energy efficient lighting in the shop. Besides saving energy, we were excited to see that the new bulbs are also brighter and provide a better quality of light.

M.W. Watermark has installed energy efficient LED lighting in our workplace
Before…
M.W. Watermark has installed energy efficient LED lighting in our workplace
After

In fact, several members of our office staff were so impressed with the difference the new lighting made on the production floor that they requested their own work area bulbs be swapped out.

M.W. Watermark has installed energy efficient LED lighting in our workplace

If you would like to learn more about how M.W. Watermark is working to make a difference, contact us today.

About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2018 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

Be Our Guest at NASF SUR/FIN® 2018

M.W. Watermark invites you to join us at the NASF SUR/FIN Show in Cleveland this year – with a free show floor admission!

NASF SUR/FIN is where leading surface technology companies connect, collaborate and contribute. It is the primary conference and trade show dedicated specifically to the surface technology industry.

It’s as Easy as 1-2-3!

  1. Click here or visit the NASF SUR/FIN website at www.nasfsurfin.com to learn more about the show.
  2. Click on the Register button near the center of the SUR/FIN website home page, or go directly to the Registration Page. Click the Register Now button.
  3. Enter “Exhibits Only” comp code C601 on the Registration Form (Advance Registration Column). Note: Comp code is for online registration only.

Click the Register Online button at the bottom of the page to complete your registration.

We will be exhibiting in Booth #601. See you at the show!

Contact an M.W. Watermark Sales and Service Team member to learn more.

Download our Surface Finishing Products Overview brochure.

Be our guest at NASF Sur/Fin 2018 with a free show floor admission

About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2018 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

The M.W. Watermark Oil Coalescing Separator Across Industries

The M.W. Watermark Oil Coalescing Separator (OCS) is a powerful piece of equipment that can be highly effective across a variety of industries and applications.

Our OCS units are designed to remove free non-emulsified oils, diesel, gasoline and fuels from a waste stream, resulting in an effluent quality of 10 mg/l or less of contaminants 20 microns and larger.

Read on, and we’ll explain a few of the most notable ways in which our customers can employ the M.W. Watermark OCS.

M.W. Watermark Oil Coalescing Separator (OCS); Oil Water Separator
M.W. Watermark Oil Coalescing Separator (OCS)

Industrial Applications for the M.W. Watermark Oil Coalescing Separator

M.W. Watermark offers our OCS in a wide range of sizes in order to appeal to the needs of several industries, including, but not limited to:

Aviation

Because aircraft are so large, the water used in the washing process may collect a great deal of grime and oil, which makes for an excellent chance to put the M.W. Watermark OCS to work. The separator will leave the water virtually oil-free, allowing it to be reused and helping to prevent unnecessary water waste.

Automotive

From bus terminals to general-purpose vehicle washes, the automotive industry offers ample opportunity to take advantage of our OCS.

Groundwater Remediation

A variety of human activities, from pesticide to landfill leakage, can cause significant groundwater pollution. These contaminants can be at least partially addressed with the M.W. Watermark OCS.

Marine

Separators are common components on ships, where they’re used to help purify oily bilge water.

Oil/Petroleum

The collection and refinement of petroleum is the perfect match for our OCS, because it results in a massive amount of oily wastewater, the treatment of which is subject to strict regulations.

Power Production

Most types of power plants require the use of both oily lubricants and water throughout their systems. An OCS can help ensure that when leakages and contamination occur, the lubricants can be thoroughly separated from the water for easy disposal.

Other Industries and Applications

Other businesses that can benefit from the M.W. Watermark OCS include chemical processing plants, paper mills, steel mills and much more. For assistance in selecting an OCS that meets the needs of your industry or for more information about our available wastewater treatment products, reach out to M.W. Watermark online or by phone at (616) 399-8850.

Visit our Oil Coalescing Separator product page to learn more.

Contact our Sales and Service Team for a quote.

About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2018 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

PolyMark™ Polymer Blending Equipment

M.W. Watermark PolyMark™ Polymer Blending Equipment
M.W. Watermark PolyMark™ Polymer Blending Equipment

M.W. Watermark’s PolyMark™ polymer blending equipment delivers reliable performance coupled with precise, yet highly intuitive controls. Eager to learn what makes our PolyMark™ polymer dosing system unique? Read on to discover how it works.

What Sets the PolyMark™ Apart from the Competition?

M.W. Watermark’s PolyMark™ polymer blending system delivers a high level of control and precision without sacrificing user-friendliness. It’s simple – the blending system combines undiluted liquid emulsion polymer with a stream of water. Then, the machine’s operator can adjust the easy-to-use controls to regulate flow application as necessary.

The PolyMark™ Line

Our extensive line of PolyMark™ polymer blending units feature options with solution flow rates from 25 gph to 2400 gph and neat polymer flow rates from 0.05 gph to 60 gph in order to suit a variety of applications.

Additionally, while the most basic PolyMark™ model features a DC (Direct Control) controller unit with on, off and remote control features, more advanced models employ SFC (Solution Flow Control) controllers, which offer:

  • Touch screens with remote control capability
  • Trending display of water flows, polymer rate and percent concentration
  • Configurable startup and shutdown processes
  • Fully automated primary and post-dilution flow control
  • And more

M.W. Watermark PolyMark Polymer Blending Units

PolyMark™ Dosing App for Your Smartphone or Tablet

Need an easy way to calculate polymer dosages while in the field or on the go?

Download our free PolyMark™ Sizing Calculator App for Android.

M.W. Watermark PolyMark Polymer Blending System - Sizing App for Android

Learn More About M.W. Watermark’s PolyMark™ Polymer Blending Equipment

Thanks to its versatile design, our PolyMark™ polymer blending system can be used across a wide range of industries, from water treatment to chemical processing and beyond.

Visit our PolyMark™ webpage to learn more.

Contact M.W. Watermark for a quote.

About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2018 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

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

M.W. Watermark 800mm Filter Press

A filter press is a piece of batch operation, fixed volume equipment ranging from .01-600 cubic feet that separates liquids and solids using pressure filtration. A slurry is pumped into the filter press and dewatered under pressure. (A slurry is a semi-liquid mixture, typically composed of fine particles suspended in water).

A filter press can be used for process, water and wastewater treatment in a variety of industries and applications. In most applications, filter presses are used for dewatering solids prior to disposal. However, in some cases the separated solid or liquid is the actual product.

Because filter presses are used across so many applications, there is no “one size fits all” when it comes to determining filter press sizing requirements.

Fortunately, 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

Standard Slurries

M.W. Watermark Filter Press Sizing Formula: Standard Slurries

Metal Hydroxide Slurries

M.W. Watermark Filter Press Sizing Formula: Metal Hydroxide Slurries

M.W. Watermark’s goal 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 M.W. Watermark 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, M.W. Watermark 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 portable pilot filter press units for on-site testing.

M.W. Watermark 250mm Pilot Filter Press

M.W. Watermark 320mm Pilot Filter Press

Filter Press Sizing App for Your Smartphone or Tablet

Need an easy way to size a filter press while out in the field or on the go?

Download our free Filter Press Sizing Calculator App for Android.

M.W. Watermark Filter Press Sizing Calculator App for Android
M.W. Watermark Filter Press Sizing Calculator App for Android

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

About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2018 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

M.W. Watermark Filter Presses: Made with Pride in the U.S.A

M.W. Watermark specializes in the design, manufacture and rebuilding of high-quality municipal and industrial water treatment equipment, including filter presses, as well as supplying parts and service to keep the world’s water supply clean and usable for generations to come.

Our facility is located in Holland, Michigan, U.S.A. Working with customers around the globe, we pride ourselves on our ability to provide a quick turnaround time on high-quality equipment and aftermarket parts. Over the years, our business has grown to become the North American leader in filter press manufacturing.

M.W. Watermark Filter Presses with Semi-Automatic Plate Shifters - Manufactured In the U.S.A. M.W. Watermark Filter Presses - Manufactured In the U.S.A.

What has fueled our growth? A commitment to offering quality, reliability, quick delivery, and value defines our company. Our manufacturing team takes great pride in building high-quality products based on many years of industry experience. In fact, each team member who has worked on a filter press or other piece of equipment proudly provides their signature on a job well done – in the form of a customer “thank you” card which is included along with the service manual.

M.W. Watermark Filter Presses - Made with Pride In the U.S.A. - Customer Thank You Card M.W. Watermark Filter Presses - Made with Pride In the U.S.A. - Customer Thank You Card

When you purchase water and wastewater treatment equipment manufactured by M.W. Watermark, you can be confident in your investment and the people that stand behind their workmanship.

Contact us today to learn more.

About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2018 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

Filter Presses and Cloths for "Lees Filtration"

How the Filter Press is Used in Winemaking

Filter presses are used for separating solids from liquids across many industries and applications. In the wine industry, the filter press is often referred to as a “lees filter.”

M.W. Watermark 470mm Filter Press Used for Lees Filtration in Winemaking
M.W. Watermark 470mm Filter Press

Lees is the sediment at the bottom of fermentation vessels and includes solids such as grape skins, pulp, stems, seeds and residual yeast. Lees can represent up to 10% of a winery’s total volume, which can be a significant amount in a larger winery. Lees also contain a high percentage of recoverable product, with solids concentrations typically in the range of 20-30%, which lends itself well to dewatering via filter press.

Grapes Used in Winemaking. Source: Wikipedia. Filter Presses and Filter Cloths for Lees Filtration.
Grapes Used in Winemaking. Source: Wikipedia

A filter press is also well-suited for this type of application as the lees filtration process generally results in a filter cake with low residual moisture (a relatively dry cake). The lees slurry is usually combined with a filter aid such as DE (Diatomaceous Earth) and fed into the filter press using an AOD pump.

Lees from Merlot Following Fermentation. Source: Wikipedia. Filter Presses and Filter Cloths for Lees Filtration.
Lees from Merlot Following Fermentation. Source: Wikipedia

The Role of Filter Cloths in Lees Filtration

M.W. Watermark Gasketed Filter Plates and Cloths Used for Lees Filtration in Wine Making
M.W. Watermark Polypropylene Filter Plates and Cloths

Filter cloths also play an important role in lees filtration. However, for many years wineries had few choices in the type of materials available. Traditional winemaking filter cloths have been composed of very fine mesh with low permeability and challenges in cleaning. Filter cloths were usually kept as long as the press itself, replaced only if damaged beyond repair. (Source: Wines & Vines, Jan. 2013).

Multifilament Filter Cloths

More recent polypropylene filter cloths have been made of multifilament threads, which are grouped together to form a single strand, or “yarn.” Multifilament fibers feature good particle retention and are very durable, since a break in a single thread has very little impact on the overall stability of the cloth.

However, the large number of threads create many spaces where solids can settle into the interior of the cloth, which can cause clogging (blinding). This can also lead to the proliferation of microorganisms using lees as a food source. The deeper the particles are embedded in the cloth, the more difficult they are to remove, causing challenges in cleaning.

M.W. Watermark Multifilament Filter Press Cloth; Filter Presses and Filter Cloths for Lees Filtration
Multifilament Filter Cloth (Click Image to Enlarge)

During the past few years, the market for winemaking has generated a wider range of available fabric types, including monofilament and mono-multi cloth materials.

Monofilament Filter Cloths

Monofilament filter cloths utilize individual round, continuous single-core plastic wire to form the cloth. This provides for a very smooth surface, with low particle retention and excellent cake release characteristics. These cloths also have the advantage of being more permeable, allowing for higher flow rates.

Because there are less spaces where solids can settle, they are less likely to become blinded, and are much easier to clean. The only drawback to monofilament cloths is in their durability. Because these cloths are woven from individual strands instead of multiple fibers woven together they are more fragile, and a crack in a single strand can compromise the stability of the entire cloth.

M.W. Watermark Monofilament Filter Cloth; Filter Presses and Filter Cloths for Lees Filtration
Monofilament Filter Cloth (Click Image to Enlarge)
Mono-Multi Filter Cloths

Mono-Multifilament fabrics combine the benefits of both mono and multi to get the best of both worlds. That is, the excellent cake release, higher flow rates and ease of cleaning of monofilament, plus the durability of multifilament fibers.

M.W. Watermark Mono-Multi Filter Press Cloth; Filter Presses and Filter Cloths for Lees Filtration
Mono-Multi Filter Cloth (Click Image to Enlarge)

M.W. Watermark has a team of experts on staff that can help you determine the best solid-liquid separation equipment and filter cloths for your particular application. We have an in-house laboratory where we can test your slurry sample and recommend the best pre-treatment, equipment and filter cloths to form an ideal filter cake. 

Contact M.W. Watermark to learn more or for a quote.

Visit our Filter Cloths 101 page for FAQ’s, additional blog links, filter cloth terms and more information on materials.

About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

© 2018 M.W. Watermark, L.L.C.
M.W. Watermark is a trademark owned by M.W. Watermark, L.L.C. All rights reserved.
Any third party trademarks referenced on this site are the trademarks of their respective owners, and M.W. Watermark makes no claim to such marks and is not affiliated with such companies.

Filter Press Maintenance and Critical Spare Parts

A filter press is designed to consistently perform in industrial environments that are oftentimes hard on equipment. With a proper maintenance routine, a filter press can last for many years.

M.W. Watermark is a leading filter press manufacturer.

The purpose of this blog is to give an overview of recommended maintenance for your press and important spare parts to keep on hand to help minimize downtime.

Start with the Service Manual for Each Filter Press…

If you are maintaining multiple filter presses at your site, work to determine commonalities between presses.

M.W. Watermark Filter Press Owner's Manual - Cover

By reviewing the service manual, you should be able to determine basic information including the manufacturer, type of hydraulic system and size of the filter plates. In addition, the service manual should include a list of replacement parts. Using this information, you can develop a list of spare parts to keep on hand.

However, if the service manual is not available, M.W. Watermark can assist with parts by utilizing photos of the filter press and the hydraulic system. For replacement cloths and plates, a photo along with the appropriate cloth or plate template form allows you to quickly communicate the dimensions and requirements to M.W. Watermark.

We have versions of these forms for both CGR (Gasketed) and NG (Non-Gasketed) filter cloths as well as CGR and NG filter plates.

Filter Cloth Template Forms

Filter Plate Template Forms

M.W. Watermark Filter Press Parts

Basic Filter Press Maintenance Tips

M.W. Watermark recommends annual oil changes on an air-over-oil filter press. As compressed air is introduced into the oil with each cycle, the oil absorbs moisture from the air. This can cause premature failure in components if the oil is not changed regularly. We recommend a high quality ISO-46 for air-over-oil hydraulic systems.

We also recommend changing the oil filter and air filter at least once per year. Keep an extra oil filter and air filter on hand for each filter press.

Check the hydraulic components for leaks on a regular basis.

Keep the following spare hydraulic components on hand in case of failure:

  • Relief valve cartridge.
  • Release / decompress valve.
  • Directional spool valve.
  • Hydraulic pump repair kit.
  • Spare hydraulic pump.
  • Air and hydraulic pressure gauges – 1 of each.
  • Hydraulic cylinder or seal kits – depending on age of cylinder.

Consider commonalities between presses.

M.W. Watermark Filter Press Hydraulic Components to Keep on Hand

Special tools to keep on hand

There are specific tools available for maintaining a filter press, filter cloths and gasketing. When a filter press goes down, time is of the essence and searching for the right tool for the job can be frustrating. Therefore, we recommend the following set of tools be kept on hand at each location where filter presses will be serviced and maintained:

  • Spanner wrench.
  • Air hammer.
  • Spatula.
  • Wedge.
  • Backup plate.
    • A backup plate (also known as a “blanking” plate) allows you to continue to run the press even if a filter plate breaks or a filter cloth goes bad.
    • Also good for running smaller batches.

M.W. Watermark Special Tools for Filter Press Cloths

Filter Cloths and Gasketing Materials

  • We recommend keeping some filter cloths and gasketing materials on hand for each press.
  • Filter cloths need replacement when your filter press is no longer forming a solid filter cake. Read about other symptoms that indicate it may be time to replace the cloths.
  • Proper care of filter cloths is an important part of maintaining the performance of a filter press. Learn more about options for cleaning your filter cloths.

M.W. Watermark Filter Press Cloths and Gasketing Material

Filter Plates

  • Clean and inspect filter plates regularly.
    • Make sure the plates are properly cleaned after scraping so that no sludge remains in the gasket sealing surfaces.
  • Keep extra plates on hand for each press in case of breakage, depending on age.
  • Again, consider commonalities.

M.W. Watermark Filter Press Plates

Hydraulic Power Unit (HPU)

If you are in need of an emergency fix for your hydraulic pumping system, but are not ready to replace or rebuild your filter press, then M.W. Watermark has a great solution for you.

M.W. Watermark has designed a stand-alone hydraulic power unit which serves as a universal retrofit for older-style filter presses.

As always, M.W. Watermark will continue to stock most air-over-oil hydraulic parts for models from other filter press manufacturers.

M.W. Watermark Retrofit Filter Press Hydraulic Power Unit (HPU)
Click Image to Download HPU Brochure
  • Available with either a 7 or an 11 gallon reservoir.
  • Size options cover most types of filter presses, from 630mm to 1200mm frame size.
  • System is air-powered: Pumps the press open and closed with hydraulic oil on both sides of the cylinder.
  • HPU has a 55:1 pump ratio.
  • Maximum clamp pressure of 4,600 PSI.

M.W. Watermark Services

  • Filter Plate Service
  • On-Site Services
    • M.W. Watermark service staff can visit your site to trouble-shoot equipment, repair hydraulic systems, etc.
  • Laboratory Services
    • Our lab services can help you determine the most effective filter press equipment, equipment sizing, filtration media required and dewatering techniques for your specific application.

M.W. Watermark Filter Press Laboratory Services

M.W. Watermark Aftermarket Accessories

  • In addition to cloth and gasketing installation tools, M.W. Watermark also offers other aftermarket accessories to help you maintain your filter press.
M.W. Watermark Filter Press Aftermarket Accessories Sheet
Click Image to Download Aftermarket Accessories Sheet

Contact M.W. Watermark to learn more or for a quote.

About M.W. Watermark

M.W. WATERMARK wants to make a difference. We are passionate about the world’s water. We are innovative, focused on customer service and always try to exceed expectations. We are an environmentally conscious company with people who are energized, encouraged and inspired to make a difference on our planet by helping to keep our shared, finite water supply clean and usable for generations to come. We build amazing, custom water and wastewater treatment equipment. Together, we can make a difference.

The product names, logos, brand names, and other trademarks listed above are the intellectual property of their respective trademark owners; M.W. Watermark is not affiliated with such trademark owners in any way.