Filter Press: Varied Plate Specifications

Filter Press Machines are used for water filter production in industries. It has features like high efficiency, low consumption, big filtration area.

What is a filter plate?

Filter plates are the most integral component of any filter press machine. These chemical resistant and pressure resistant filter plates used in a filter press machine are made of polypropylene. Filter plates are installed with different types of filter cloth and play the most important role in solid and liquid separation. The filter plates installed in a filter press machine can function for a long period during the filter press process. They also can withstand extreme temperatures that can go as high as 130 degrees to as low as 10 degrees. Filter plates and cake thickness are customized based on the application and filtration conditions. The size of the filter plates in a filter press machine can be anywhere between 305mm*305mm to 1500mm*2000mm, with a cake thickness of 15mm to 50mm. Correct filter plates and cake size is important for an efficient filtration process.

Filter plates for a filter press machine

In a filter press machine, filter plates are chosen on the following basis – filter cloth support, temperature stability, chemical resistance, differential pressure resistance, drain ability, and handling.

• Plate and frame filter plate

  Plate and frame plate are also called the "flush plate. The plate and frame filter plate are made of flat, solid plate enveloped with a filter press cloth. There is a vacant frame between each plate of the plate and frame filter type selection. A metal skeleton clutches and clamps the filter plates together to create a room created by the flush plates on respective sides of a frame. Traditionally, filter plates used in a filter press machine were made of wood or cast iron. However, in recent times, the filter plates used are polypropylene.

Why you should choose a plate and frame filter plate

The most important point of using a plate and frame filter plate selection in a filter press machine is the capability of swiftly changing the filter cloth. Also, you can use a diversified range of materials for filtration in a plate and frame filter plate type and paper, which is sometimes used for fine filtration applications.

For example, in a filter press process in a filter press machine where immediate particle conservation is critical, filter paper may be needed as fine solids would either close the filter cloth or will go through it. We should remember that filter cloth are still present to hold up the filter paper. You can use the filter cloth once more, but the filter paper needs to be changed after every filtration cycle.

• Recessed plate filter type

A recessed plate filter type in a filter press machine uses filter plates in one line and forms like a cavity when they are attached. Suspended particles accumulate on the filter cloths and form a filter cake between each cavity space of the filter plates. The filter plates of a recessed chamber in a filter press machine are polypropylene. However, the filter plates of a recessed chamber can be gasketed or non-gasketed. Gasketed plates provide greater safety from leakage, but they also include a lot of time investment in changing filter cloths. Non-gasketed plates have latex used on their edges to lessen the effect of wicking.

Why you should choose a recessed plate in a filter press machine

The main reason why you should choose a recessed plate in a filter press machine is its capability to reach higher feed pressure. The sealing surface of the recessed plate in a filter press machine is attached to the center web. The position of the recessed plate in the center web keeps the "frame" in its original position when it is subjected to high pressure and protects it from giving out under extreme conditions. Also, when we use recessed plates in the machine, filter cakes are released very easily. When the machine is unlocked and the plates are moved, the filter cake drops or is brushed off using a spatula.

• CGR filter plate type

  A CGR filter cloth is in an octagon shape and is congested inside a groove. The groove is placed on the exterior edges of the plate recess. CGR filter plate type is an upgraded version of the recessed chamber. CGR filter plates are mostly used in mining, chemical manufacturing, industrial, municipal waste, and food and beverage. The material used to make a CGR filter plate is made of polypropylene. It has a piped surface to provide safety to filter cloth. This design ensures efficient filter cloth support and filtration.

Why you should choose CGR filter plates

CGR filter plates have a long operational life. They are rust-resistant and can withstand high temperature, pressure, and flow. In addition, when CGR filter plates are used in the filter press process, they provide a leak-free operation. The piped surface of CGR filter plate safeguards the filter cloth and ensures efficient filtration.

• Membrane filter plates selection

  Also referred to as a "mixed pack," a membrane filter press selection is an alternate combination of one recessed chamber filter plate and one membrane plate in the plate pack. Using a membrane filter plate where the alternate combination of diaphragm plates and recessed plate lessens the moisture in the cake and saves cost in overall plate pack cost. The membrane filter plate usually functions at a high pressure of 7 bar and compressed pressure to 15 bar.

Why you should choose a membrane filter press selection

By using a membrane filter plates selection, you can increase the consistency in the dehydration of the filter cake. It also consumes less air during blow-drying. As a result, the membrane filter plate has a lesser filtration, washing, and discharge time. By choosing a membrane filter plate selection, you can reduce the moisture content in your final filter cake. The entire filter press process takes less amount and thus helps save costs and time.