Depending on the specific installation, the loss of chemicals or steam may not cause
immediate problems for the DPA press. Chemicals and steam are both required for
proper pulp washing and bleaching, and if there is a failure or reduction in the supply
of either, then an orderly shutdown of the system should be made to minimize poor
quality pulp as well as to ensure a reasonable startup later.
The press should be flushed clean of pulp in the process sequence. However, if only a
short stoppage is expected, the plant can be left running on water.