| POSSIBLE CAUSE | CONSEQUENCE | INSTRUCTIONS |
|---|
| Filter Press being overfilled | Towards end of filtration the cake gap closes in individual chambers and interrupts the pressure compensation between the chambers | Monitor the filling process according Envirotech Molded Products instructions |
| Permeability of filter cloths differs | Slurry distribution uneven between the chambers, in chambers with high cloth permeability cake gap closes premature and interrupts pressure compensation between the chambers | Pay attention to uniform cloth conditions in each chamber, always clean all cloths at the same time, always use the same cloth quality |
| Filling Velocity Too High Or Too Slow | Pressure drop along the filter press, chambers fill differently, in high pressure areas cake gap closes premature and interrupts pressure compensation between the chambers | Adapt the filling velocity parameters |
| Filtrate Holes Plugged | Filtrate reflux and slow or no cake build-up in individual chambers, in chambers with undisturbed cake build-up cake gap closes premature and interrupts pressure compensation between the chambers | Pay attention to good upkeep of the plates and a clean nub surface, clean the filtrate holes from time to time |
| Cake Residues in the Feed Eye of a Chamber from beginning of Filtration | Reduction of slurry flow, slow cake build-up in some single chambers, in chambers with undisturbed cake build-up cake gap closes premature and interrupts pressure compensation between the chambers | Pay attention to careful discharge of the chambers, clean the feed eyes |
| Blocked feed eye in the chamber during filtration | Ditto | Pay attention to the homogeneity of the slurry |
| Operational Bending of the Plates When Easily Filterable Slurry | Ditto | Use feed eye support rings |
| Easily Filterable Slurry | Unintentional cake build-up in the center feed eye, reduction of slurry flow, slow cake build-up in some single chambers, in chambers with undisturbed cake build-up cake gap closes premature and interrupts pressure compensation between the chambers | Instead of ordinary barrel neck filter cloths use rubber barrel neck or single cloth with support ring |
| Non Fitting Cloths in the Center Feed Eye Area | Unintentional cake build-up in the center feed eye, reduction of slurry flow, slow cake build-up in some single chambers, in chambers with undisturbed cake build-up cake gap closes premature and interrupts pressure compensation between the chambers | Pay attention to good fitting of the filter cloths |
| Interruption of the filtration process | When opening the press the cake collapses in some chambers, when continuing the filtration that cake interrupts the pressure compensation between the chambers | After interrupting the filtration process discharge the whole press |
| Membrane Defective or Out Of Function | No pressure compensation to intact chambers | Check the membranes regularly for defects and right pressure connecting |
| Holes in Filter Cloth | Plugging of filtrate holes, filtrate reflux and slow or no cake build-up in individual chambers, in chambers with undisturbed cake build-up cake gap closes premature and interrupts pressure compensation between the chambers | Check the filter cloths regularly for defects |