26 octobre 2017 ~ 0 Commentaire


Learn the Three Basic Types of a New or Used Filter Press

Industries that utilize solid/liquid separation processes however wish to control costs may gain from purchasing a used filter press or other previously owned equipment, rather than purchasing new. The equipment has a very simple design of a plates and horns. It employs a pressure drive to process fixed amounts of liquid or slurry material in batches, and stops to release a « cake » until the next batch is begun.
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When looking for a used filter media, you will find there are 3 main types:

Plate and Frame

This is the most elementary design. It’s also referred to as a « membrane filter plate » and contains frames, plates, and encourage railings. It also contains a centrifuge pump that prevents solids from settling into the machine and provides aid through the separating chambers in the gear. Each room comprises a hollow framework that is separated from two plates by cloth. A cake accumulates since the slurry passes through each frame. Since the cake thickens, the resistance causes the mechanism to slow. It quits when the room has filled, and the desired pressure difference is reached. The frame and plate are all pulled apart, and the cake has been discharged. After each discharge, each cloth is cleaned with a particular wash solution, and also the gear is prepared to begin the next cycle.


This type is made from the exact same basic components. However, as the name implies, its operations are fully automated. It includes larger plates and frames with mechanical plate shifters. The shifters rapidly transfer the plates so that the cakes can be discharged immediately. This kind usually incorporates security shutdown mechanisms. If there’s not enough clamping pressure, then the system will close down, preventing leaks between the discs. It also has a compressor at the filter plates which assists with drying the cakes. The automated features permit the equipment to operate more effectively, reducing disposal costs and operator time and increasing the life of the cloth and pumps.


This type contains polypropylene squares with a concave depression and center hole. Two plates form a room to pressurize the slurry by means of a fabric liner into a chamber. It can hold up to 80 plates side by side, based on how much capacity is necessary. The main difference between this type and the plate and frame type is that, together with the recessed model, the way by which the plates are joined allows the cake to form in the recess of each plate. This attribute limits the cake size to be no longer than 32mm unless extra frames are utilized for separation. With this process, however, fabric changing takes more, leading to longer processing times between cycles. It also can’t use filter papers, and may result in uneven cakes.

Which kind of equipment is used is dependent upon the expected capability going through the machine, the operator expertise, budget, and general facility preferences. When managed properly, a used filter media will last a long time and need little maintenance. Industries that require this kind of equipment but are worried about costs may find buying pre-owned systems are the best solution.

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