Graco ProMix PD2K Repair Parts page 13

Moisture Sensitivity of Acid Catalysts
Acid catalysts can be sensitive to atmospheric
moisture and other contaminants. It is recommended
the catalyst pump and valve seal areas exposed to
atmosphere are flooded with ISO oil, TSL, or other
compatible material to prevent acid build-up and
premature seal damage and failure.
332709D
Important Acid Catalyst Information
NOTICE
Acid build-up will damage the valve seals and
reduce the performance and life of the catalyst
pump. To prevent exposing acid to moisture:
• Always use a sealed container with a desiccant
dryer in the vent, or a nitrogen atmosphere.
Never store acids in an open container.
• Keep the catalyst pump and the valve seals filled
with the appropriate lubricant. The lubricant
creates a barrier between the acid and the
atmosphere.
• Use only moisture-proof hoses compatible with
acids.
• Always lubricate threaded parts with an
appropriate lubricant when reassembling.
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