Graco 309868D User Manual

. 1 to identify references shown in parentheses, 

i.e., (A).

1.

Close the pump air regulator (C) and the bleed-type 
master air valve (A), required in your system. 

2.

Hold a metal part of the dispensing valve (H) firmly 
to a grounded metal waste container, and trigger the 
valve to relieve fluid pressure.

1.

With the air regulator (C) closed, open the 
bleed-type master air valve (A).

2.

Open the dispensing valve (H) into a grounded 
metal waste container, making firm metal-to-metal 
contact between the container and valve.

3.

Open the pump air regulator (C) slowly, just until the 
pump is running. When the pump is primed and all 
air has been pushed out of the lines, close the dis-
pensing valve (H).

NOTE: When the pump is primed, and with sufficient air 
supplied, the pump starts when the dispensing valve (H) 
is opened, and shuts off when it is closed.

4.

Adjust the air regulator (C) until you get sufficient 
flow from dispensing valve (H). Always run the 
pump at the lowest pressure necessary to get the 
desired results. Do not exceed the maximum work-
ing pressure of any component in the system.

5.

If your pump accelerates quickly or is running too 
fast, stop it immediately and check the fluid supply. If 
the supply container is empty and air has been 
pumped into the lines, prime the pump and lines 
with fluid, or flush it and leave it filled with a compat-
ible solvent. Be sure to eliminate all air from the fluid 
lines.

6.

Read and follow the instructions supplied with each 
component in your system.

7.

If the pump will be unattended for any period of 
time, if there is an air supply interruption, or at the 
end of the work shift, shut off the system and always 
relieve the pressure.

This equipment stays pressurized until pressure is 
manually relieved. Read PRESSURIZED EQUIP-
MENT HAZARD warnings on page 2.

Maximum working pressure of all components in the 
system may not be the same. To reduce risk of over-
pressurizing any component, be sure you know the 
maximum working pressure of each component. 
Never exceed the maximum working pressure of the 
lowest rated component in the system. Overpressur-
izing any component can result in rupture, fire, explo-
sion, property damage, and serious injury.

To determine the fluid output pressure using the air 
regulator reading, multiply the ratio of the pump by 
the air pressure shown on the regulator gauge. For 
example:

3:1 ratio x 100 psi air = 300 psi fluid output

Limit the air pressure to the pump so that no air line 
or fluid line component is overpressurized.

Never allow the pump to run dry of the fluid being 
pumped. A dry pump will quickly accelerate to a high 
speed, possibly causing pump damage. It may also get 
very hot.