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A pressure drum filter is a sealed device that utilizes a porous drum filtering medium to integrate washing, extraction, evaporation, and drying functions; it continuously and fully automatically captures the solid particles in liquid-solid mixtures, thereby achieving solid-liquid separation. It can quickly separate solids from various types of suspended materials, enable continuous discharge, handle large volumes of material, achieve good dehydration results, feature simple operation, require little space, and has a high degree of automation. The product design meets GMP and FDA regulatory requirements. Pressure drum filters use the pressure applied at the suspension inlet or the mechanical compression force exerted on the wet material as the driving force for filtration; they are suitable for suspensions that require a high filtration pressure difference, and are available in both batch and continuous operation modes. Intermittently operated tubular filter presses and pressure leaf filters are used for filtering low-concentration suspensions. A filter press is also a pressurized filter that operates intermittently; it comes in three types – plate and frame, chamber, and vertical – and has a wide range of applications. An oil filter is a plate and frame filter press unit equipped with accessories such as an oil pump and a vacuum evaporator. Continuously operating drum pressure filters and disk pressure filters carry out pressure filtration within a sealed chamber, and their structure is similar to that of drum vacuum filters and disk vacuum filters. Due to its complex structure, it is used less frequently. Technical features: 1. The filter cake with a specific structure and density, which has been slightly compressed, can be cleaned in one or several stages. This design of the rotary pressure filter ensures that the minimum amount of cleaning medium is used for backwashing. The cleaning solution is discharged through the drain pipe, while the filter cake is separated via the control head (depending on the washing stage selected), and is recycled back to the filter if necessary. The filter cake is dehydrated, dried, and evaporated. 2. From the perspective of operating the fully automatic filter or considering the service life of the filter’s structure, it is necessary to have a simple and thorough method for discharging the filter cake. In rotary pressure filters, the filter cake generally falls due to its own weight; if adhesion prevents the filter cake from falling, the discharge process is aided by air or gas backflow, or by mechanical removal using scrapers. The filtering medium is cleaned by flushing the chamber with water. The cleaning mechanism can use a pressure of up to 25 bar, which makes it possible to rinse the filter clean from the direction in which it is retained. 3. Before continuous operation, pressure filters were almost always operated in a batch mode; this machine, however, is of the continuous type and meets the requirements of modern continuous production. It exhibits unique advantages when it comes to filtering harmful and toxic solids as well as solvents. 4. Excellent sealing ensures that there is no risk of leakage, even when dealing with filter slurries containing methanol or toluene, or when volatile solvents must be used as washing liquids, or with materials that have strong odors. 5. High efficiency: During one full rotation of the drum, a series of processes such as filtration, filter cake washing, liquid removal and drying, and discharge are carried out simultaneously. 6. The moisture content of the filter cake is low because, in addition to pressure filtration, compressed air, superheated steam, or high-temperature gases are also used to dry the filter cake, resulting in a low moisture content. 7. Safety: This machine operates at a low speed, so it does not pose the potential dangers associated with high-speed rotating machinery.