Spray Technique - Glas Craft Probler P2 User Manual

Spray Technique

Always operate safely and follow all safety procedures
outlined.
To achieve the optimum spray pattern for each applica-
tion, the appropriate mixing chambers are available in
six round and six flat spray sizes. Hardened mixing
chambers are also available (see mixing chamber
chart).
The standard mixing chamber supplied with your gun
will be adequate for all but the smallest and largest
applications.
Foam rise and cure times will vary according to the
material and substrate temperature. Higher material or
substrate temperature will increase rise and cure times;
lower material or substrate temperatures will decrease
rise and cure times. Consult your chemical manufac-
turer's data specification sheets for their recommended
spray temperatures. Under most circumstances, both
components will be used at identical temperatures.
Operation
Higher pressures and temperatures may be used to
increase material break-up, improve mixing and speed
rise times. With hose lengths over 50 ft., or when mater-
ial viscosities are high, higher material pump pressures
may be necessary.
The gun air switch assembly MUST BE OPENED
(down position) prior to spraying to provide air for trigger
operation and purge air when the trigger is released.
When spraying, the gun trigger may be depressed con-
tinuously, or triggered at the end of each stroke. A
smooth, even layer is best achieved by moving the
Gun back and forth in a slow, even motion, overlapping
the previous pass about 50 to 75 percent. DO NOT
SPRAY OVER RISING FOAM! The ideal gun-to-surface
distance is about 18 to 24 inches. Be sure to point the
gun directly at the surface to be sprayed. Spraying at
an angle to the surface will cause the foam to be rough
and will generate overspray.
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