Graco Python A25115 Parts list manual

3A4386E
EN
Instructions-Parts
Python™Chemical
Injection Pump
(For Applications Requiring ATEX Approval)
Pneumatic pump for injecting chemicals at well sites. For use with compressed air only.
For professional use only.
See page 3 for model information, including maximum working
pressures. Important Safety Instructions
Read all warnings and instructions in this manual.
Save all instructions.
II 2 G Ex h T6 Gb

23A4386E
Contents
Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Configuration Number Matrix . . . . . . . . . . . . . . . . . 4
Key Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . .5
Component Identification . . . . . . . . . . . . . . . . . . . . 7
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Required Accessories . . . . . . . . . . . . . . . . . . . . . 8
Flush Before Using Equipment . . . . . . . . . . . . . . 8
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . 9
Mount the Pump and Connect Chemical Supply 9
Connect Pneumatic Supply . . . . . . . . . . . . . . . . 10
Connect Chemical Outlet . . . . . . . . . . . . . . . . . 10
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Pressure Relief Procedure . . . . . . . . . . . . . . . . 17
Flush the Equipment . . . . . . . . . . . . . . . . . . . . . 17
Prime the Pump . . . . . . . . . . . . . . . . . . . . . . . . 18
Calibrate Chemical Dosage . . . . . . . . . . . . . . . 19
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Preventive Maintenance Schedule . . . . . . . . . . 22
Tighten Threaded Connections . . . . . . . . . . . . . 22
Tighten Packings . . . . . . . . . . . . . . . . . . . . . . . 22
Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Check Valves . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Timing Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Python Pneumatic Pump . . . . . . . . . . . . . . . . . 37
Python Timing Valve Assembly . . . . . . . . . . . . 41
Kits and Accessories . . . . . . . . . . . . . . . . . . . . . . 43
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Python Pump Dimensions . . . . . . . . . . . . . . . . . 44
Performance Charts . . . . . . . . . . . . . . . . . . . . . . . 45
1 1/4” Air Motors (PCI-125) . . . . . . . . . . . . . . . . 45
1 3/4” Air Motors (PCI-175) . . . . . . . . . . . . . . . . 49
2” Air Motors (PCI-200) . . . . . . . . . . . . . . . . . . . 52
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
California Proposition 65 . . . . . . . . . . . . . . . . . . . 57
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 58

Models
3A4386E 3
Models
NOTE: See the Configuration Number Matrix, page 4, to find the plunger and air motor size for your unit.
Plunger Size Air Motor Size Maximum Working Pressure psi (MPa, bar) Maximum Pneumatic Inlet Pressure psi (MPa, bar)
1/8 in.
1-1/4 in.
12,000 (82.7, 827) 170 (1.17, 11.7)
3/16 in. 6500 (44.8, 448)
200 (1.40, 14.0)
1/4 in. 3500 (24.1, 241)
3/8 in. 1500 (10.3, 103)
1/2 in. 875 (6.0, 60)
5/8 in. 500 (3.4, 34)
3/4 in. 400 (2.8, 28)
1/8 in.
1-3/4 in.
12,000 (82.7, 827) 87 (0.60, 6.0)
3/16 in. 12,000 (82.7, 827) 163 (1.12, 11.2)
1/4 in. 7000 (48.3, 483)
200 (1.40, 14.0)
3/8 in. 3000 (20.6, 206)
1/2 in. 1750 (12.1, 121)
5/8 in. 1000 (6.9, 69)
3/4 in. 800 (5.5, 55)
1/8 in.
2 in.
12,000 (82.7, 827) 66 (0.46, 4.6)
3/16 in. 12,000 (82.7, 827) 125 (0.86, 8.6)
1/4 in. 9500 (65.5, 655) 168 (1.16, 11.6)
3/8 in. 4000 (27.6, 276)
200 (1.40, 14.0)
1/2 in. 2250 (15.5, 155)
5/8 in. 1500 (10.3, 103)
3/4 in. 1000 (6.9, 69)

Configuration Number Matrix
43A4386E
Configuration Number Matrix
Check the identification plate (ID) for the 12-digit Configuration Number of your pump. Use the following matrix to
define the components of your pump.
NOTE: Not all combinations are possible.
Sample Configuration Number: PCI-125-19S-XA-A
Key Points
• Standard pressure pumps feature 1/4 in. NPT(F)
inlet and outlet connections.
• High pressure pumps feature 1/4 in. NPT(F) inlet
and HiP HF4 outlet connections.
• B32240 can be used to convert HF4 outlet connec-
tion to 1/4 in. NPT(F) for applications 10,000 psi and
under.
PCI 125 19 S X A A
Pneumatic
Chemical
Injection
Air Motor Size Plunger Size Pressure Range Plunger Material Seal Material Qualifier
Air Motor Size Plunger Size Pressure Range Plunger Material Seal
Material Qualifier
125 1-1/4 inch 13 1/8” Diameter S StandardPressure
(1/4”, 3/8”, 1/2”, 5/8”,
3/4” plungers)
C Ceramic Coated
17-4 PH Stainless AFKM AATEX
175 1-3/4 inch 19 3/16” Diameter H High Pressure
(1/8” & 3/16” plung-
ers)
X Chromex Coated
17-4 PH Stainless B FKMETP
200 2 inch 25 1/4” Diameter CHNBR
38 3/8” Diameter D FFKM
50 1/2” Diameter
63 5/8” Diameter
75 3/4” Diameter

Warnings
3A4386E 5
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama-
tion point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When
these symbols appear in the body of this manual or on warning labels, refer back to these Warnings. Product-specific
hazard symbols and warnings not covered in this section may appear throughout the body of this manual where
applicable.
FIRE AND EXPLOSION HAZARD
When flammable fluids are present in the work area be aware that flammable fumes can ignite or
explode. To help prevent fire and explosion:
• Use equipment only in well ventilated area.
• Eliminate all ignition sources, such as cigarettes and portable electric lamps.
• Ground all equipment in the work area.
• Keep work area free of debris, including rags and spilled or open containers of solvent.
• Do not plug or unplug power cords or turn lights on or off when flammable fumes are present.
• Use only grounded hoses.
•Stopoperationimmediatelyifstaticsparkingoccurs oryoufeel ashock.Donotuseequipmentuntil
you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
SKIN INJECTION HAZARD
High-pressure fluid from dispensing device, hose leaks, or ruptured components will pierce skin. This
may look like just a cut, but it is a serious injury that can result in amputation. Get immediate surgical
treatment.
• Do not put your hand over the fluid outlet.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow the Pressure Relief Procedure when you stop dispensing and before cleaning, checking, or
servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses and couplings daily. Replace worn or damaged parts immediately.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or
swallowed.
• Read Safety Data Sheet (SDS) to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.

Warnings
63A4386E
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, inhalation of toxic fumes, and burns. Protective equipment includes but is not
limited to:
• Protective eyewear, and hearing protection.
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system com-
ponent. See Technical Data in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all
equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information
about your material, request Safety Data Sheet (SDS) from distributor or retailer.
• Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.
• Checkequipmentregularly.Repairorreplacewornordamagedparts immediately with genuineman-
ufacturer’s replacement parts only.
• Do not alter or modify equipment. Alterationsor modifications may void agency approvals and create
safety hazards.
• Make sure all equipment is rated and approved for the environment in which you are using it.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.

Component Identification
3A4386E 7
Component Identification
Numbered items in the key below correspond to the
numbers in the Parts Lists starting on page 37.
Key:
FIG. 1 Pump Components
21
8
12
120
13
17
22
18
1 Air Motor Housing
8 Air Piston Cylinder
12 Dust Shield
13 Fluid Cylinder
17 Inlet Valve Check
18 Outlet Valve Check
20 Priming Bleed Valve
21 Pump Stroke Adjuster
22 Timing Valve

Installation
83A4386E
Installation
Grounding
Pump: ground through electrically conductive air and
fluid lines.
Air and fluid lines: use only electrically conductive
lines.
Air compressor: follow manufacturer’s recommenda-
tions.
Fluid supply container: follow local code.
Required Accessories
Install the following required accessories in the order
shown in FIG. 2, using adapters as necessary. See Kits
and Accessories starting on page 43.
Air Line
•Bleed-type master air valve (D): required in your
system to relieve air trapped between it and the air
motor when the valve is closed.
• Be sure the valve is easily accessible from the
pump and located downstream from the air reg-
ulator.
•Pump air regulator (E): to control pump speed and
outlet pressure. Locate it close to the pump.
•Air line filter (C): removes harmful dirt and mois-
ture from compressed air supply.
•Second bleed-type air valve (air shutoff valve)
(B): isolates air line accessories for servicing.
Locate upstream from all other air line accessories.
Fluid Line
•Fluid filter (Y-Strainer) (included in G): with a 60
mesh (250 micron) stainless steel element to filter
particles from the fluid before in reaches the pump.
•Fluid shutoff valve (H): shuts off fluid flow.
•Pressure relief valve (J): overload protection.
Flush Before Using Equipment
The equipment was tested with lightweight oil, which is
left in the fluid passages to protect parts. To avoid con-
taminating your fluid with oil, flush the equipment with a
compatible solvent before using the equipment. See
Flush the Equipment, page 17.
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes to
ignite or explode. Grounding provides an escape wire
for the electric current.

Installation
3A4386E 9
Typical Installation
FIG. 2 is an example of an installation with a Python
chemical injection pump. Your installation may differ
from what is shown here. (See Required Accessories,
page 8.) The Python pump (F) is the only component in
FIG. 2 supplied by Graco. All other components are sup-
plied by customer.
Key:
A Main Air Supply Line
B Air Shutoff Valve
CAirFilter
D Bleed-type Master Air Valve
E Air Pressure Regulator
FPump
G Manifold Assembly (includes y-strainer and fluid shutoff
valve (H))
H Fluid Shutoff Valve (inlet & outlet)
J Fluid Pressure Relief Valve
K Fluid Inlet Line
LInletPort
MOutletPort
N Air Lubricator
P Fluid Outlet Line
Mount the Pump and Connect
Chemical Supply
If you have an application, or mounting configuration,
that requires installation in a manner different than
depicted in FIG. 2, please contact your Graco distributor
for assistance.
NOTE: A y-strainer (G) or chemical filter is required
before the pump inlet. This will keep any debris from the
tank from reaching the pump seals. Fluid filters are
available from Graco. See Kits and Accessories on
page 43.
1. Mount the pump (F) and connect the fluid inlet
line (K).
The pump is designed to be vertically mounted directly
from the 1/4 female NPT inlet port (L). The inlet port (L)
is on the bottom and is designated by a flow arrow point-
ing into the pump. Verify the inlet plumbing is sufficiently
strong to support the weight of the pump.
FIG. 2: Typical Installation
A
C
E
B
D
F
J
K
H
G
L
M
N
H
P

Installation
10 3A4386E
Connect Pneumatic Supply
1. Install the pneumatic regulator (E) and gauge to
control the inlet pressure. See Models on page 3for
your model’s maximum pneumatic pressure.
NOTE: If less than 200 psi supply pressure is used, the
pump’s maximum output pressure will be decreased
proportionally. See Minimum Gas Pressures by Fluid
Plunger Size and Outlet Pressures on page 11. Mini-
mum Gas Pressure can be found by first finding the
table that corresponds to the plunger size. Next, using
the column that corresponds to the air motor size, find
the row equal to or slightly greater than the outlet pres-
sure of the pump. The value is the Minimum Gas Pres-
sure 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 timing 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 1/8 in. female NPT
port (116) on the timing valve. (See Python Timing
Valve Assembly, page 41.) An 1/8 in. NPT fitting is
preferred, though a 1/8 in. - 1/4 in. NPT adapter is
included for convenience.
Connect Chemical Outlet
1. Connect a 1/4 npt(f) fluid line from the outlet check
valve (M) to the injection point.
NOTE: On high pressure configurations
(PCI-xxx-xxH-xx-x), the 1/4 npt(f) fitting is replaced with
an HiP HF4 fitting.
2. Install a 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 43.
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 high pressure configurations
(PCI-xxx-xxH-xx-x), the 10-32 fitting is replaced with a
1/16 in. NPT(F) fitting.
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.