Membrane chamber filter presses add a flexible polypropylene or EPDM diaphragm behind each chamber plate. After primary filtration at 7-8 bar fills the chamber, compressed air or water inflates the diaphragm at 15-16 bar, mechanically squeezing residual moisture from the filter cake. Cake moisture reductions of 5-15% versus standard chamber presses are typical.
Why Membrane Squeeze Works
Membrane squeeze eliminates the diminishing returns of hydraulic pressure alone. Standard filtration reaches asymptotic cake moisture at 7-8 bar because the cake itself becomes the flow restriction. The diaphragm applies direct mechanical pressure to the cake surface, bypassing flow resistance through the cake matrix.
Cycle Time Optimization
Cycle time optimization balances squeeze pressure (12-16 bar), squeeze duration (5-15 minutes), and air/water consumption. Over-squeezing wastes energy without further moisture reduction. Membrane lifetime of 5,000-10,000 cycles depends on squeeze pressure and slurry abrasiveness.
Equipment
The PP Membrane Press provides diaphragm squeeze. The High Pressure Press adds structural pressure. The Automatic Press automates cycles. Filter Cloth complements membrane performance. The Oil Filter Press handles oil-based slurries.
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