Filter press operating procedures
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2.2 Turn on the power switch – the power indicator light will turn on; 2.3 Press the “Start” button to activate the oil pump； 2.4 Move all filter plates to the push plate end and position them at the center of the two crossbeams; 2.5 Press the “Compact” button – the piston then pushes the compacting plate to compress all the filter plates. Once the hydraulic operating pressure is reached (the value is specified in the performance table), rotate the locking nut to maintain this pressure. Press the “Stop” button to shut down the oil pump; 2.6 For low-flow discharge: open the filtrate valve; for high-flow discharge: turn on the water nozzle. After that, open the feed valve to start the filtration process. 2.7 Close the feed valve to stop feeding. 2.8 Washable version: Turn on the water nozzle, then open the wash water valve to allow water to flow in for washing. (Filtrate cake washing) 2.9 After washing, compressed air is introduced to blow and press, thereby squeezing out any remaining water. 2.10 Diaphragm type: Open the compressed air valve and inflate the diaphragm to compress the filter cake again and reduce its moisture content. 2.11 Start the oil pump, press the “Compress” button; once the locking nut loosens, turn the nut to the front end of the piston rod (the end of the compression plate). Then press the “Release” button – the piston, along with the compression plate, will return to the appropriate working gap, after which the motor is turned off. Move each filter plate to discharge the slag. 2.12 Inspect the filter cloth and filter plate, and clean the residues on the joint surfaces. The next working cycle can be initiated by moving all filter plates back to the thrust plate end and positioning them at the center of the two crossbeams.
http://bbs.hcbbs.com/viewthread.php?tid=319857&highlight= Main faults, causes, and solutions: Cylinder pressure does not reach the set range; pressure gauge is damaged； Leaking pipes ； The seal ring inside the cylinder is leaking oil. The electrical equipment is faulty; the oil pump is not working properly. There are debris in the pressure regulating pin of the relief valve, and there is debris in the hydraulic oil. The pressure gauge needs to be replaced, the pipelines need to be repaired, and the seals inside the cylinder need to be replaced. Inspect the relief valve, electrical components, and oil pump. Clean the relief valve and replace it with clean hydraulic oil. The pressure holding is poor, so the locking nut cannot be tightened; the locking nut is not properly secured. The cylinder pressure is low, so it cannot push up. Lock nut. The pressure is temporarily increased by 1 MPa; after the lock nut is loosened, the oil pressure decreases by 1 MPa. The filtrate is turbid; the filter cloth is damaged and leaking. Replacing or repairing the filter cloth; deformation of the filter frame is caused by improper use, while debris blocking the pores creates a pressure difference in the filter chamber. The clamping force is insufficient, and the temperature exceeds 100°C. Clean the drainage channels, remove impurities from the slurry, and adjust the head pressure. Reduce the material temperature. If the filter plate is severely deformed, it should be replaced. Leakage between the plastic head, tail plate, and machine plate. Cracks are present in the plastic welds at the fixed screw holes at the head and tail ends, as well as in the plastic flange rings. Re-plastic weld.