User's Manual

309024 5
WARNING
MOVING PARTS HAZARD
Moving parts can pinch fingers.
 Keep clear of all moving parts when starting or operating the equipment.
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the
skin, inhaled, or swallowed.
 Know the specific hazards of the fluid you are using.
 Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all
local, state and national guidelines.
 Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid
and solvent manufacturer.
 Avoid exposure to heated material fumes.
 Provide adequate ventilation.
 Graco does not manufacture or supply any of the reactive chemical components that may be
used in this equipment and is not responsible for their effects. Graco assumes no responsibility
for loss, damage, expense or claims for personal injury or property damage, direct or conse-
quential, arising from the use of such chemical components.
System Information
This manual describes pumps designed to be part of a
Variable Ratio Hydra-Cat Pump (VRHC) dispensing
system. The VRHC proportions, mixes, and dispenses
two component fluid materials by powering two positive
displacement pump lowers from a common air motor.
This assures that the stroke rate and stroke length of
all pump lowers are proportional as set, providing
constant proportioning. The mix ratio is determined by
the movement of the outboard (slave) pump along the
arm of the machine. This movement changes the
stroke of the slave cylinder and, along with its volumet-
ric output relationship to the master cylinder, deter-
mines the output (volumetric) ratio. The volumetric
ratio is expressed as the proportion of the volume of
fluid of the primary pump compared to the volume of
the secondary pump.
The basic proportioner includes an air motor, lower
displacement pumps, air controls, fluid inlet hardware,
fluid outlet hoses, manifold blocks and relief valve.
Additional proportioner accessories are selectable to
complete the proportioner pump (see Configurator
Product Order Form 309025).