Graco G Series Operation manual

306878ZAA
EN
Instructions-Parts List
High Pressure Fluid
Regulators
For use in airless spray systems to control and regulate fluid pressure to one spray gun,
dispensing valve, or atomizing head. For professional use only.
Model 206661, Series G
1000-3000 psi (7-21 MPa, 70-207 bar)
Regulated Fluid Pressure Range
Model 217576, Series D
200-1000 psi (1.4-7 MPa, 14-70 bar)
Regulated Fluid Pressure Range
3000 psi (21 MPa, 207 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions in this
manual before using the equipment. Save
these instructions.

2306878ZAA
Contents
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Before Installing the Fluid Regulator . . . . . . . . . . 5
Installing the Fluid Regulator . . . . . . . . . . . . . . . 5
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . 6
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pressure Relief Procedure . . . . . . . . . . . . . . . . . 7
Spray Tip Installation and Removal . . . . . . . . . . 7
Trigger Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Adjusting the Regulator . . . . . . . . . . . . . . . . . . . . 8
Flush the Equipment . . . . . . . . . . . . . . . . . . . . . . 8
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Repairing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Fluid Pressure Gauges . . . . . . . . . . . . . . . . . . . 12
Compression Springs . . . . . . . . . . . . . . . . . . . . 12
Technical Specifications . . . . . . . . . . . . . . . . . . . . 13
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . 14

Warnings
306878ZAA 3
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.
WARNING
SKIN INJECTION HAZARD
High-pressure fluid from gun, 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 spray without tip guard and trigger guard installed.
• Engage trigger lock when not spraying.
• Do not point gun at anyone or at any part of the body.
• Do not put your hand over the spray tip.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow the Pressure Relief Procedure when you stop spraying 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.

Warnings
4306878ZAA
WARNING
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
component. See Technical Specifications in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical
Specifications in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For
complete information about your material, request Safety Data Sheets (SDSs) from distributor or
retailer.
• Do not leave the work area while equipment is energized or under pressure.
• Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine
manufacturer’s replacement parts only.
• Do not alter or modify equipment. Alterations or 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.
• Wear hearing protection when operating this equipment.
• Do not lift pressurized equipment.
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 Sheets (SDSs) 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.

Installation
306878ZAA 5
Installation
Fluid pressure regulators are used for accurate positive
control of the fluid pressure to spray guns, dispensing
valves or atomizing heads.
Regulators installed at circulating line take-offs or
pumps are used to reduce main line pressure and
maintain the desired fluid pressure to the spray gun,
dispensing valve, or atomizing head.
Before Installing the Fluid
Regulator
1. Determine placement of the fluid regulators in sys-
tem.
2. Install a ball valve for inlet and outlet of the regula-
tor.
3. Install temporary plumbing between the ball valves.
4. Thoroughly flush the system to remove metal chips
and other contaminants and to check for leaks.
Installing the Fluid Regulator
1. Remove the temporary plumbing and install one
regulator for each spray gun. A mounting stud,
washers, and locknut are provided for mounting the
regulator either from the bottom or side.
2. Put sealer on threaded connections, except on
swivel unions as it interferes with the swivel action.
3. Connect the fluid supply line to the 3/8 npt(f) inlet of
the fluid regulator.
4. Connect the fluid line between the gun and the reg-
ulator’s 1/4 npt(f) outlet of choice.
NOTE: Make sure that the direction of the fluid flow
agrees with the IN and OUT markings on the regula-
tor body.
5. Flush and test the entire system.

Installation
6306878ZAA
Typical Installation
Single Direct Spray Station
E
Figure 1
F
C
G
D
B
A
Multiple Circulating Spray Station
Figure 2
G
A
E
C
J
H
I
F
K
KEY
APump
B Air Regulator
C Fluid Regulator
D Gauge
E Spray Gun
F Fluid Drain Valve
G Supply Container
H Back Pressure Valve
I Fluid Supply Line
J Fluid Return Line
K Back Pressure Regulator

Operation
306878ZAA 7
Operation
Pressure Relief Procedure
Follow the Pressure Relief Procedure whenever
you see this symbol.
1. Engage trigger lock.
2. Close the bleed-type master air valve.
3. Disengage the trigger lock.
4. Hold a metal part of the gun firmly to a grounded
metal pail. Trigger the gun to relieve pressure.
5. Engage the trigger lock.
6. Open all fluid drain valves in the system, having a
waste container ready to catch drainage. Leave
drain valve(s) open until you are ready to spray
again.
7. If you suspect the spray tip or hose is clogged or
that pressure has not been fully relieved:
a. VERY SLOWLY loosen the tip guard retaining
nut or the hose end coupling to relieve pressure
gradually.
b. Loosen the nut or the coupling completely.
c. Clear the obstruction in the hose or tip.
Spray Tip Installation and
Removal
Trigger Lock
Always engage the trigger lock when you stop spraying
to prevent the gun from being triggered accidentally by
hand or if dropped or bumped.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid, and moving parts, follow the Pressure Relief
Procedure when you stop dispensing and before
cleaning, checking, or servicing the equipment.
To avoid serious injury from skin injection, do not put
your hand in front of the spray tip when installing or
removing the spray tip and tip guard.
NO YES

Operation
8306878ZAA
Adjusting the Regulator
The fluid pressure regulator controls pressure down
stream from its outlet.
NOTE: The inbound fluid pressure needs to be higher
than the set point fluid pressure.
To adjust the fluid regulator, first, back the knob out until
there is no spring pressure. Then, turn the knob clock-
wise to increase the pressure.
NOTE: If you are using an accessory fluid pressure
gauge, relieve the spray gun line when reducing pres-
sure to ensure a correct gauge reading.
Adjust the pump air pressure and the fluid regulator for
the best spraying combination. In a circulating system,
also adjust the back pressure valve.
Record all the settings for future reference. The valve
cylinder (7) has exterior markings (set points 1 to 8) for
repeat settings.
Flush the Equipment
• Flush before changing colors, before fluid can dry in
the equipment, at the end of the day, before storing,
and before repairing equipment.
• Flush at the lowest pressure possible. Check con-
nectors for leaks and tighten as necessary.
• Flush with a fluid that is compatible with the fluid
being dispensed and the equipment wetted parts.
1. Record the pressure adjustment setting of the regu-
lator before flushing.
2. Shut off the pump and follow Pressure Relief Pro-
cedure.
3. Never exceed the maximum working pressure of the
lowest rated system component.
4. Open the fluid regulator by turning the adjusting
knob (6) fully clockwise.
5. Supply solvent to the system. Set pump to the low-
est possible pressure, and start pump.
6. Flush until thoroughly clean.
7. Adjust the fluid regulator to return to the desired
fluid pressure setting.
To avoid fire andexplosion, alwaysground equipment
and waste container. To avoid static sparking and
injury from splashing, always flush at the lowest pos-
sible pressure.

Maintenance
306878ZAA 9
Maintenance
Flushing
Refer to Flush the Equipment on page 8 for the flush-
ing procedure.
Cleaning
When changing fluids or colors, the regulator should be
disassembled and cleaned. Regular cleaning and
inspection, and lubrication of the piston (15) and piston
packing (10) are necessary to keep the fluid regulator
working properly.
1. Relieve all the air and fluid pressure in the system.
2. Remove the regulator from the system.
3. Disassemble the regulator. See Parts on page 10.
Clean and inspect all parts.
Repairing
Normally, only the ball support (21), seat (20) and piston
packing (10) will ever need replacement. Repair Kit
220139 is availableto replace these parts. SeeParts on
page 10.
1. Lubricate the piston packing (10), piston (15), and
spring locater (11) with lithium base grease.
2. Place the washer (19) over the pointed end of the
piston (15).
3. Place the packing (10), with its lips facing down,
over the pointed end of the piston (15) and against
the washer (19).
4. Insert the piston (15) into the bottom of the cylinder
(7) and gently work it into place.
5. Reassemble the remaining parts in reverse order of
disassembly. Torque the valve seat (20) into the
housing to 175-200 in-lb (20-22 N•m). Over-tighten-
ing could break off the hex portion of the seat.
COMPONENT RUPTURE HAZARD
To reduce the risk of serious bodily injury, including
fluid injection or splashing in the eyes or on the skin:
• Always follow the Pressure Relief Procedure on
page 7 before adjusting, cleaning, repairing, or
removing the regulator from the system.
•Never pressurize the system with the fluid regula-
tor adjusting knob removed.
•Never completely remove the adjusting knob
when system pressure is present.
NOTICE
Use special care when handling the hard carbide
portions of the piston (13) and seat (12). Damage
will cause poor operation and leakage.

Parts
10 306878ZAA
Parts
Model 206661, Series G
Includes items 1-20
6
9
11
7
Install with
lips down
*10
19
3
*15
16
18
8
13
8
5*
20*
17
2
14
12
26
1
4
Use Loctite®
Grade 601 on
threads
Torque to
55 to 65in-lb
(6.3 to 7.3N•M) 1
Ref. Part Description Qty.
1 100322 LOCK WASHER, ext shkprf; 7/16”
(Model 206661 only) 2
100639 LOCK WASHER, ext shkprf; 3/8”
(Model 217576 only) 2
2 101885 SCREW, soc hd cap; 1/4–20 x 1–
3/4” 2
3 101954 RING, int retaining; 0.75” (19 mm)
housing dia.; cadmium plated 1
4 150513 NUT, jam; 7/16–20
(Model 206661 only) 1
100307 NUT, jam; 3/8–16
(Model 217576 only) 1
5* 150670 GASKET; copper 1
6 166976 KNOB, adjusting 1
7 166982 CYLINDER, regulator 1
8166985 SEAL, o-ring; PTFE 2
9 166986 SPRING, helical compression
(Model 206661 only) 1
501511 SPRING, helical compression
(Model 217576 only) 1
10* 111796 PACKING, u-type; PTFE 1
Ref. Part Description Qty.
Mounting
Parts
Torque to
175 to 200in-lb
(20 to 22 N•M)
Use Loctite®
Grade TL242 on threads