Graco Reactor 3 E-XP1 Operation page 14

Important Isocyanate Information
Material Material Self Material Self - - - Ignition Self Ignition Ignition
Some materials may become self-igniting
if applied too thick. Read material
manufacturer's warnings and Safety Data
Sheets (SDSs).
Keep Keep Components Keep Components A A A and Components
Separate Separate Separate
Cross-contamination can result in cured
material in fluid lines which could cause
serious injury or damage to equipment. To
prevent cross-contamination:
Never interchange component A and
• Never Never
component B wetted parts.
• Never use solvent on one side if it has been
contaminated from the other side.
Changing Materials Materials
Changing Changing Materials
NOTICE
NOTICE NOTICE
Changing the material types used in your
equipment requires special attention to avoid
equipment damage and downtime.
• When changing materials, flush the
equipment multiple times to ensure it is
thoroughly clean.
• Always clean the fluid inlet strainers after
flushing.
• Check with your material manufacturer for
chemical compatibility.
• When changing between epoxies and
urethanes or polyureas, disassemble and
clean all fluid components and change
hoses. Epoxies often have amines on the
B (hardener) side. Polyureas often have
amines on the B (resin) side.
14
and B B B and
Moisture Sensitivity Moisture Moisture Sensitivity Sensitivity of of of Isocyanates
Exposure to moisture (such as humidity) will
cause ISO to partially cure, forming small, hard,
abrasive crystals that become suspended in the
fluid. Eventually a film will form on the surface
and the ISO will begin to gel, increasing in
viscosity.
NOTICE NOTICE NOTICE
Partially cured ISO will reduce performance
and the life of all wetted parts.
• Always use a sealed container with a
desiccant dryer in the vent, or a nitrogen
atmosphere. Never Never store ISO in an open Never
container.
• Keep the ISO pump wet cup or reservoir (if
installed) filled with appropriate TSL fluid.
The TSL fluid creates a barrier between the
ISO and the atmosphere.
• Use only moisture-proof hoses compatible
with ISO.
• Never use reclaimed solvents, which may
contain moisture. Always keep solvent
containers closed when not in use.
• Always lubricate threaded parts with an
appropriate lubricant when reassembling.
• Cycle material through the Reactor at
least once per week when wetted and
sitting idle. Use the A-side transfer pump
to flush material through the A-side
outlet manifold recirculation fitting. See
Flush the Equipment, page
• The Reactor should not be stored after
ingesting air or running out of material.
Prior to storage, follow the Purge Air
procedure in your operation manual.
NOTE: The amount of film formation and rate of NOTE: NOTE:
crystallization varies depending on the blend of
ISO, the humidity, and the temperature.
Foam Resins Resins with with 245
Foam Foam Resins with
Agents
Agents Agents
Some foam blowing agents will froth at
temperatures above 90°F (33°C) when not under
pressure, especially if agitated. To reduce
frothing, minimize preheating in a circulation
system.
Isocyanates Isocyanates
35.
245 fa fa fa Blowing Blowing
245 Blowing
3A8500E