What is a filter press and what are its advantages?

Vishal Patel

Filter Presses have been the priority of Met-Chem Manufacturing for several years. Filter presses (AKA Plate and Frame) have various advantages. One, specifically, is that such a huge piece of machinery has fewer parts to it.

The uncomplicatedness of the Filter Press causes only little maintenance work that is required to be done to the press.

The filter press skeleton and filter press plates doesnt require any repair as long as the press is controlled accurately. They will remain for a lifetime.

What is a Membrane Filter Press?

When it comes to filtering press cycle time, a membrane filter press is a good option.

In general, it takes 4 hours to fill a filter press. (The exact time is determined as per the solids loading potential of the press and the kind of slurry pumped through it.) On the other hand, a membrane press can lessen cycle time by 50 percent on average and about 75 percent in some conditions, depending on the application.

How does a Membrane Filter Press Work?

For metal hydroxide sludge, for example, a conventional filter press takes 4 hours to fill plates with a cake thickness of 32mm. At around the 2-hour mark, the unit usually is 80 percent full. Because of the high pressure (100 psi from the diaphragm pump vs. 4,000 psi from the hydraulic system), resistance rises, and the diaphragm pump slows down significantly.

If you need to get your press back up and running quickly, a membrane press might be the way to go. The chambers (area between the plates) of a membrane press are identical to those of a typical filter press, except that membranes squeeze excess water from the slurry. A press with only membrane plates can be expensive, but the combined pack is more cost-effective. Each chamber in a mixed pack includes a membrane on one side that will expand, creating the squeezing motion against a solid recessed plate. The optimal time to inflate the membrane diaphragms to provide the extra squeeze is when the press is loaded to roughly 80% capacity (estimated by past data and/or the frequency of the diaphragm pump).

Uses of Filter Press

Slurries of water mixed with solids are fed into the press using a feeding pump, which works differently for each filter press but follows a similar system. Once pumped into the press, pressure, usually from a centrifugal pump or a similar device – pumps the material into chambers of filter plates; this removes pollutants from the liquid as “filter cakes” of solids build up in the machine’s filters.

Once the filter press chambers are full, its filtration cycle is finished, and the mechanism frees the filter cakes. These cakes are effortlessly removed, enabling you to filter your liquid at high efficiency. One may utilize fast-action automatic plate shifters in filter presses to improve the speed of cake removal and cycle duration. A completely autonomous filter press plan is necessary to manage the 24-hour workloads in more strict situations requiring a constant operation, such as mining activities or chemical industries.

One should create the filter cloth for your application and the types of solids you are filtering to get the best performance out of your filter press.

One can also customize the following to meet specific requirements:

  • Plate size and number of chambers
  • Filtration capacity
  • Machine design

Additionally, you can use more drip trays, cloth washing systems, and cake shields to improve filter press performance and functionality. In the end, One should create each filter press According to the expected volume and type of slurry that it will be working.

As filter presses operate through pressure, The equipment that increases pressure due to high-pressure technology is excellent for optimizing the operation of your filter press. That’s the idea to success for Matec® filter presses, which practice 21 to 30 bar pressures to manage even the most complex and hard-to-treat slurries, no matter the division or application.

Filter presses come in a variety of sizes, ranging from small lab-scale presses to large-scale presses.

Many industries utilize filter presses to separate liquid and solid, Like:

  • Power Generation
  • Asphalt and Cement Production
  • Municipal Plants
  • Mining
  • Food and Beverage Processing
  • Chemical Manufacturing
  • Aggregates
  • Steel Mills

The different parts of a filter press are

  • the plumbing, which has the manifold and center feed pipe
  • the hydraulic pump and cylinder
  • the steel skeleton
  • the filter plates
  • and the filter press cloths

Filter Presses have been the focus of NMP manufacturing for many decades. We have obtained solid reliability to build quality Complete Waste Treatment Systems, Filter Presses, Filter Press Plates, and Filter Press Cloths. Chemical and food processing and plating, and metal finishing are among industries that use our filter presses. The closures on these filter presses might be manual or automatic, but they must always feature a hydraulic cylinder for sure, high-pressure closing. NMP filter presses capacity can be increased for the future by making it in a bigger skeleton with a distance piece. Once you are set to expand, you can exclude the distance piece and attach the extra plates.

NMP can build to your requirements. Our Sales and Engineering team will work together to get the proper solutions to efficiently manage your filtration requirements.

Filter Press Features

  • On automatic units, an air-driven hydraulic closing pump with a pressure gauge is used.
  • 2 Stage Hand Pump on Manual Units
  • Hydraulic Cylinder that is Heavy Duty for Opening and Closing of Press
  • Polypro Gasketed Recessed Plates for Leak Free Operation
  • Filter Cake Air Drying with Air Blown Manifold Piping

NMP offers high-quality, reliable replacement filter plates for most brands and models of filter presses. This confidence arises from the truth that NMP is a leader in both filter presses and filter media.


The belt filter press is capable of handling special sludges

Some sludge, for example, railway, oil, and sludge built by using wastewater with diatomite. Other kinds of filter presses cannot process well, and belt filter press can obtain good outcomes.

Low energy costs

Under the same conditions, the belt filter press has the same treatment result as other filters, but water usage and power consumption are just 1/3 compared to other equipment.

Small space occupation

Because of the unique structure, the belt filter press uses only 1/2 of the equipment. But does the same treatment effect as other filter presses.

Stable operation and long service life

The machine’s filter belt has high strength and a short length. Due to the specific adjustment structure, it is not easily damaged. The filtration belt has a long service life and steady functioning. High-strength stainless steel bearings are used rather than regular carbon steel bearings. The corrosion resistance is considerably improved, and the service life of the equipment can stand 10 years.

Easy operation

The operation of the belt filter press is not as complicated as other filter presses due to its simple structure and appropriate design; even ordinary workers can operate it.

Continuous operation

Unlike other filter presses, the belt filter press does not run regularly and can operate continuously for up to 24 hours.

Filter Press Plate and Frame vs Recessed Filter Press

Plate and Frame Filter Presses are the most basic and oldest type of Filter Press. A metal skeleton holds and locks the filter plates together to build a pressure chamber in the formation. Clamping is accomplished with either an old-fashioned wheel crank or, more recently, a hydraulic pump and cylinder (either manual or automatic). The plates are made of a variety of metals, including cast iron, aluminum, and polymers, the most popular of which is polypro. Before being filtered through the cloth, the slurry is pushed into one or more corner holes and then into each frame. The filtered clean water runs through the solid plate’s drainage system and into one or more corner holes that aren’t used for slurry feed. This clean solution makes its way to the customer’s tanks, drain, or process via discharge pipes. No more slurry can be fed into the filter press once these hollow frames are full with solids, so it’s time to open the press and knock out the solids.

How does a membrane filter press work?

The 21st century is well equipped with technologies and automation industries. The use of technologies and automation had drastically changed the scenario and performance of the next-generation filter press. The membrane filter press is the most trusted dewatering equipment. The main purpose for this treatment is wastewater applications from industries. A filter paper extracts the liquid from the solid by removing various impurities. A filter press consists of a frame, filter plates, piping and valves, and filter cloth. The filter press will make the separation with the help of technology and applications which is convenient and economical in case of dewatering.

What is filter cloth selection?

A filter cloth selection plays important role in the case of filtration. A filter press, filter cloth, and shields clear filtration process with the help of short filter cycle and dry filter cake. Advanced technology had made this work easier in the 21st century. There are various types of filtration paper which is used by industries. The top companies avail themselves of their filter cloth and paper. The high-quality filter paper with good services can be detained easily by the top manufacturer. To know more about filter cloth selection have a look below.