Vacuum/Membrane filter plates have a chamber below the drainage
surface that is inflated after the filter cake is formed. Heated water
175F°-230F° (higher temperatures may be used with metal cores)
is pumped through this cavity, both inflating the membrane against
and transferring heat into the filter cake.
A constant pressure is generated by water flow, which keeps the membrane
face against the filter cake as it shrinks during the drying process.
A vacuum applied within the filtration chamber draws out moisture
from the filter cake and will, with sufficient time, produce a bone
dry product.