Graco Python XL 3/4" [9/48] Connect chemical outlet

Graco Python XL 5/8
Installation
3A3948B 9
Connect Pneumatic Supply
1. Install the pneumatic regulator (E) and gauge to
control the inlet pressure. See Models on page 3 for
your model’s maximum pneumatic pressure.
NOTE: If less than 100 psi supply pressure is used, the
pump’s maximum output pressure will be decreased
proportionally. See Minimum Pneumatic Pressures by
Fluid Plunger Size and Outlet Pressures on page 10.
Minimum Pneumatic Pressure can be found by first find-
ing the table that corresponds to the plunger size. Next,
using the column that corresponds to the pneumatic
motor size, find the row equal to or slightly greater than
the outlet pressure of the pump. The value is the Mini-
mum Pneumatic Pressure required to achieve the fluid
outlet pressure.
2. Install a pneumatic line filter (C) to keep debris from
affecting pump performance and to increase pump
life.
NOTE: Keep the needle valve knob closed at this point
to keep the pump from operating without fluid, which
minimizes seal wear.
3. Attach a pneumatic line to the 1/4 in. female NPT
port (116) on the needle valve.
Route Exhaust to Remote
Location
Replace the 3/8 in. npt muffler (215) with a pneumatic
line to route exhaust to a remote location.
Connect Chemical Outlet
1. Connect a 1/4 npt(f) fluid line from the outlet check
valve (M) to the injection point.
NOTE: On “H” outlet connection configurations
(PCI-xxx-xxH-xx-x), the 1/4 npt(f) fitting is replaced with
an HiP HF4 fitting.
2. Install a fluid pressure relief valve (J) on the outlet
side of the pump.
NOTE: A pressure relief valve is available from Graco
and can be connected back to the tank or directly to the
inlet side of the pump. See Kits and Accessories on
page 41.
3. Set the pressure relief valve at or below the maxi-
mum working pressure of the pump.
4. Connect a 10-32 UNF fluid outlet from the
prime/bleed valve (21) to the fluid source or waste
reservoir.
NOTE: On “H” outlet connection configurations
(PCI-xxx-xxH-xx-x), the 10-32 fitting is replaced with a
1/16 in. NPT(F) fitting.
NOTICE
Due to the operational design of the pneumatic valve,
3.5% of the exhaust is not recoverable, and will vent
to atmosphere.
In the event of an injection line blockage, to reduce the
risk of skin injection and damage to the pump, ensure
the pressure relief valve is set at or below the maxi-
mum working pressure of the pump.

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