The plate - frame filter press has three forms: manual press, mechanical press and hydraulic press.Manual pressing is the screw jack to push the pressing plate;Mechanical compaction is the motor with H reducer, the frame drive parts to push the compression plate compaction;Hydraulic pressure is a hydraulic station through the frame of the hydraulic cylinder components to push the pressing plate.The two beams connect the thrust plate and the pressing device together to form a rack. The pressing plate and the pressing device are connected on the rack. The filter plate and the filter frame are arranged alternately between the thrust plate and the pressing plate.The pressing device pushes the pressing plate to press all the filter plates and filter frames into the frame. After the rated pressing force is reached, the filtration can be carried out.The suspension enters each filter chamber from the feed hole on the thrust plate (the filter box and adjacent filter plate form the filter chamber), the solid particles are trapped in the filter chamber by the filter medium, and the filtrate is discharged out of the machine through the outlet hole.

The filtrate of the filter press has two forms of clear flow and underflow. The filtrate is discharged directly from the liquid outlet hole of each filter plate. The clear flow is convenient to monitor the filtration situation of each filter plate.If the filtrate of each filter plate is combined and discharged out of the machine through an outlet pipe, it is called dark flow. Dark flow is used for filtering the filtrate which is volatile or the filtrate is harmful to human body.

The small manual plate and frame filter press consists of a group of filter Chambers arranged alternately by filter plates and frames.The surface of the filter plate is grooved and its protruding part is used to support the press cloth.There are through holes in the corner of the filter frame and filter plate. After assembly, a complete channel is formed, which can be filled with suspension, washing water and filtrate.Both sides of the plate and the frame are supported by handles on the crossbeam.The press cloth between the plate and the frame ACTS as a sealing gasket.The suspension hydraulic pressure is fed into the filter chamber by the feed pump, and the filter residue is formed on the press cloth until the filter chamber is filled.The filtrate flows through the filter cloth and along the groove of the filter plate to the edge and corner channel of the plate frame for centralized discharge.After filtration, clean washing water can be used to wash the filter residue.After washing, sometimes also into the compressed air, remove the remaining washing liquid.Then open the filter press to remove the filter residue, clean the press cloth, re-press the plate, box, and start the next working cycle