Adjust Ratio - Graco Hydra-Cat Xtreme XL Instructions - Parts Manual

Adjust Ratio

Adjust Adjust Ratio Ratio
Understanding the terms used with the Hydra–Cat
(H.P.) System System, how it functions, and how to find and
(H.P.) (H.P.) System
set the correct ratios ratios for your application is the key to ratios
easier, more versatile operation of your proportional
system.
Be sure to read and understand the following
information before operating the equipment.
Table 1 1 1 Terms Terms
Table Table Terms
Term Term Term
Ratio
Primary Pump (A)
Secondary Pump (B)
There are three main steps when applying the use
of ratios:
1. Determine the ratio that is required,
2. Calculate the ratio setting.
3A3092A
Hydra–Cat Hydra–Cat
Definition Definition Definition
Ratio refers to the
Ratio Ratio
simultaneous output
of a certain volume of
fluid by the primary primary and primary
secondary secondary pumps secondary pumps. pumps
primary pump pump (A) (A)
The primary primary pump (A)
is directly under the
air motor air air motor (H) motor (H); it usually (H)
pumps the base base fluid. base
The secondary secondary pump secondary pump pump
(B) is on the opposite
(B) (B)
end of the lever lever arm lever arm arm
(E); it usually pumps the
(E); (E);
catalyst. The ratio of the catalyst catalyst
secondary pump(s) can
be changed by adjusting
the ratio ratio ratio adjustment adjustment adjustment
screw (C). (C).
screw screw (C).
3. Set the ratio on the Hydra-Cat H.P. system.
Figure 2
A Primary Pump
B Secondary Pump
C Ratio Adjustment Screw
D Wet Cups
E Fulcrum and Arm
F
Primary Pump Output
G Secondary Pump Output
H Air Motor
J Air Input
K Bleed Type Master Air Valve
Adjust Ratio
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