Graco Husky 307 Instructions-Parts List Manual page 6

Air Line
WARNING
A bleed-type master air valve (B) is required in
your system to relieve air trapped between this
valve and the pump. See Fig. 4 to Fig. 7. Trapped
air can cause the pump to cycle unexpectedly,
which could result in serious injury, including
splashing in the eyes or on the skin, injury from
moving parts, or contamination from hazardous
fluids.
CAUTION
The pump exhaust air may contain contaminants.
Ventilate to a remote area if the contaminants
could affect your fluid supply. See Air Exhaust
Ventilation on page 10.
1. Install the air line accessories as shown in Fig. 4 to
Fig. 7. Mount these accessories on the wall or on
a bracket. Be sure the air line supplying the acces-
sories is grounded.
a. The fluid pressure can be controlled in either
of two ways. To control it on the air side, install
an air regulator (H). To control it on the fluid
side, install a fluid regulator (M) near the pump
fluid outlet (see Fig. 5).
b. Locate one bleed-type master air valve (B)
close to the pump and use it to relieve trapped
air. See the WARNING above. Locate the
other master air valve (E) upstream from all air
line accessories and use it to isolate them
during cleaning and repair.
c. The air line filter (F) removes harmful dirt and
moisture from the compressed air supply.
2. Install an electrically conductive, flexible air hose
(C) between the accessories and the 1/4 npt(f)
pump air inlet (see Fig. 2). Use a minimum 1/4"
(6.3 mm) ID air hose. Screw an air line quick
disconnect coupler (D) onto the end of the air hose
(C), and screw the mating fitting into the pump air
inlet snugly. Do not connect the coupler (D) to the
fitting yet.
6 308553
Installation
Fluid Suction Line
D If using a conductive (acetal) pump, use conductive
hoses. If using a non-conductive (polypropylene)
pump, ground the fluid system. See Grounding on
page 5.
D The pump fluid inlet is 3/8 npt(f). See Fig. 2.
Screw the fluid fitting into the pump inlet snugly.
Use a compatible liquid thread sealant or PTFE
tape on connections to prevent air from getting into
material line.
D At inlet fluid pressures greater than 15 psi (0.1
MPa,1 bar), diaphragm life will be shortened.
D See the Technical Data on pages 33 and 34 for
maximum suction lift and flow rate loss at various
lift distances.
Fluid Outlet Line
A fluid drain valve (J) is required in your system to
relieve pressure in the hose if it is plugged. See
Fig. 4 to Fig. 7. The drain valve reduces the risk of
serious injury, including splashing in the eyes or on
the skin, or contamination from hazardous fluids
when relieving pressure. Install the valve close to
the pump fluid outlet.
D Use electrically conductive fluid hoses (N). The
pump fluid outlet is 3/8 npt(f). See Fig. 2. Screw the
fluid fitting into the pump outlet snugly.
D Install a fluid regulator (M) at the pump fluid outlet
to control fluid pressure, if desired (see Fig. 5). See
Air Line, step 1a, for another method of controlling
pressure.
D Install a fluid drain valve (J) near the fluid outlet.
See the WARNING above.
WARNING