Graco Series B Operation manual

Instructions – Parts List
GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441
Copyright 1988, Graco Inc. is registered to I.S. EN ISO 9001
STAINLESS STEEL, WATERBASE COMPATIBLE
Fluid Pressure Regulator
For use in air–assisted system to regulate pressure to gun.
Fluid regulator valve is cartridge mounted for quick, in–line replacement.
Model 222121, Series B
1500 psi (10.3 MPa, 103 bar) Maximum Fluid Inlet Pressure
150–1200 psi (1.0–8.3 MPa, 10.4–83 bar) Regulated Fluid Pressure Range
Patent Pending
Table of Contents
Safety Warnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Drawing 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Charts 12. . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensional Drawing 12. . . . . . . . . . . . . . . . . . . . . . . . . .
Technical Data 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranty 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Information 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
307886K
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
7531A
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2 307886
Symbols
Warning Symbol
WARNING
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
Caution Symbol
CAUTION
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
instructions.
WARNING
INSTRUCTIONS
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.
DThis equipment is for professional use only.
DRead all instruction manuals, tags, and labels before operating the equipment.
DUse the equipment only for its intended purpose. If you are not sure, call your Graco distributor.
DDo not alter or modify this equipment. Use only genuine Graco parts and accessories.
DCheck equipment daily. Repair or replace worn or damaged parts immediately.
DDo not exceed the maximum working pressure of the lowest rated system component. Refer to the
Technical Data on page 13 for the maximum working pressure of this equipment.
DUse fluids and solvents which are compatible with the equipment wetted parts. Refer to the Tech-
nical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s warnings.
DRoute hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose
Graco hoses to temperatures above 180_F (82_C) or below –40_F (–40_C).
DDo not kink or over bend the hoses or use the hoses to pull equipment.
DWear hearing protection when operating this equipment.
DDo not lift pressurized equipment.
DComply with all applicable local, state, and national fire, electrical, and safety regulations.
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307886 3
WARNING
INJECTION HAZARD
Spray from the gun, leaks or ruptured components can inject fluid into your body and cause extremely
serious injury, including the need for amputation. Fluid splashed in the eyes or on the skin can also
cause serious injury.
DFluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate surgi-
cal treatment.
DDo not stop or deflect leaks with your hand, body, glove or rag.
DKeep your hands away from the end of the drain valve when opening it.
DLock the gun trigger safety when you stop spraying.
DFollow the Pressure Relief Procedure on page 5 if the spray tip clogs and before cleaning,
checking or servicing the equipment.
DFollow the Pressure Relief Procedure on page 5 before removing the regulator’s adjusting knob.
DDo not pressurize the system when the fluid regulator’s adjusting knob is removed.
DTighten all fluid connections before operating the equipment.
DCheck the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
Do not repair high pressure couplings; you must replace the entire hose.
DUse only Graco approved hoses. Do not remove the spring guard that is used to help protect the
hose from rupture caused by kinks or bends near the couplings.
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,
inhaled, or swallowed.
DKnow the specific hazards of the fluid you are using.
DStore hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
DAlways wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and
solvent manufacturer.
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4 307886
Installation
KEY
AAir regulator
BBleed-type master air valve
CPump
DFluid filter & drain valve
EMain fluid supply line
FGun fluid supply line
GFluid regulator
HFluid pressure gauge
& drain valve
JAir-assisted spray gun
KBack pressure valve
LFluid return line
MMain circulating line
NFluid supply container
AB
C
D
E
F
J
K
M
H
K
L
ABC
G
D
J
Single Direct Spray Station
Multiple Circulating Spray Station
Install the fluid regulator(s) (G) in the spray gun fluid supply
line (F) as shown in the Typical Installation drawing above or
at right. Connect only one spray gun or dispensing valve to
each fluid regulator.
Using pipe sealant on pipe threads, connect the fluid supply
line (F) to the fluid regulator’s 1/4 npt(f) inlet. Connect the line
from the gun (J) to the regulator’s 1/4 npt(f) outlet.
Make sure the direction of fluid flow agrees with the IN and
OUT markings on the regulator body.
The regulator was tested in lightweight oil. Flush the entire
system with a solvent compatible with the fluid being sprayed
or dispensed, then test the system.
H
NOTE:
The Typical Installation
drawings are only guides for
selecting and installing a
circulating or direct system.
They are not actual system
designs. Contact your Graco
distributor for the particular
type and size system best
suited for your needs.
G
N
F
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307886 5
Operation
Pressure Relief Procedure
WARNING
INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
starting or spraying accidentally. Fluid
under high pressure can be injected through the
skin and cause serious injury. To reduce the risk of
an injury from injection, splashing fluid, or moving
parts, follow the Pressure Relief Procedure
whenever you
DAre instructed to relieve the pressure
DStop spraying
DCheck or service any of the system equipment
DInstall or clean the spray tip
1. Lock the gun trigger safety and any other
equipment safety locks.
2. Turn off the power to the pump.
3. Unlock the gun trigger safety.
4. Close the bleed-type master air valve (required in
your system).
5. Hold a metal part of the gun firmly to the side of a
grounded metal pail, and trigger the gun to relieve
pressure.
6. Lock the gun trigger safety.
7. Slowly open the drain valve (required in your
system), and have a container ready to catch the
drainage.
8. Leave the drain valve open until you are ready to
spray again.
If you suspect that the spray tip or hose is completely
clogged, or that pressure has not been fully relieved
after following the steps above, very slowly loosen the
tip guard retaining nut or hose end coupling, and
relieve pressure gradually, then loosen completely,
then clear the tip or hose.
Operating the Regulator
CAUTION
DTo avoid contaminants clogging or damaging the
regulator, you must clean and test the new
system thoroughly before you admit fluid to the
regulator.
DAlways use the lowest possible air and fluid
pressures for your application. High pressures
can cause premature spray tip and pump wear.
NOTES:
DThe fluid pressure regulator controls pressure
downstream from its outlet.
DIf using an accessory fluid pressure gauge (H), to
ensure a correct gauge reading, relieve the spray
gun line pressure after reducing the regulator
pressure.
1. Back the regulator adjusting screw (18) out (turn
counterclockwise) until there is no spring pressure.
Relieve the spray gun line pressure.
2. Turn the adjusting screw clockwise to increase the
fluid pressure.
3. Adjust the pump air pressure and fluid regulator for
the desired spray pattern. Use the lowest possible
air and fluid pressures for your application.
4. In a circulating system, also adjust the back
pressure valve.
5. Record all the settings for future reference.
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6 307886
Maintenance
Flushing
DFlush before changing colors, before fluid can dry in
the equipment, at the end of the day, before storing,
and before repairing equipment.
DFlush at the lowest pressure possible. Check
connectors for leaks and tighten as necessary.
DFlush with a fluid that is compatible with the fluid
being dispensed and the equipment wetted parts.
1. Record the pressure adjustment setting of the
regulator before flushing.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 5.
2. Shut off the pump and relieve fluid pressure in the
system by triggering the gun and opening the back
pressure valve or other bypass valve.
3. Never exceed the maximum working pressure of
the lowest rated system component.
4. Open the fluid regulator by turning the adjusting
screw (18) fully clockwise.
5. Supply solvent to the system. Set pump to the
lowest possible pressure, and start pump.
6. Flush until thoroughly clean.
7. Adjust the fluid regulator to return to the desired
fluid pressure setting.
Cleaning
NOTE: Do not allow fluid to settle in the system.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 5.
1. Relieve the pressure.
2. Remove the regulator. Clean and inspect all parts.
CAUTION
Handle the hard carbide parts, ball (5), valve actuator
(9), and seat (6) carefully to avoid damaging them.
Damage will cause poor operation and leakage.
Cartridge Replacement
NOTE: Kit 222140 replaces the fluid regulator valve
cartridge. See page 10 for the parts included.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 5.
1. Relieve the pressure.
2. Remove the cartridge by loosening the valve
housing (1) and pulling the cartridge assembly out
of the regulator housing (24). See Fig. 1.
3. Install the new cartridge assembly into the
regulator housing (24). Torque the valve housing
(1) to 30 to 35 ft-lbs (41 to 47 NSm).
Fig. 1
1*
Torque to
30 to 35 ft-lb
(41 to 47 N-m)
24
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307886 7
Maintenance
Diaphragm & Valve Actuator Replacement
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 5.
1. Relieve the pressure.
2. Remove the regulator from the fluid line.
3. Remove the six cap screws (19) from the regulator
housing (24). See Fig. 2.
4. Remove the diaphragms (26 and 27). Inspect the
carbide pin in the valve actuator (9) for wear.
Replace if necessary.
5. Install the new diaphragms, with the PTFE
diaphragm (26) facing toward the regulator
housing (24), as shown in Fig. 2.
6. Install the valve actuator (9) and six cap screws
(19). Torque the cap screws in the order shown in
Fig. 2.
26
27
PTFE
(white)
16
9
24
1*
19
HytrelRrequires uniform compression.
Torque each bolt no more than 1/8 turn at a
time in the sequence shown. Repeat pattern
until uniform torque of 60–70 in-lb (6.8–7.9
N-m) is obtained. HytrelRdiaphragm should
never extrude more than 1/16 in. on a side.
Torque to
30 to 35 ft-lb
(41 to 47 N-m)
16
43
25
IN
OUT
Torque Sequence
HytrelR
(off-white)
Fig. 2 7533A
HytrelRis a registered trademark of the DuPont Company.
18
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8 307886
Notes
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307886 9
Troubleshooting
WARNING
To reduce the risk of serious bodily injury, including
fluid injection, splashing in the eyes or on the skin,
or injury from moving parts, always follow the
Pressure Relief Procedure on page 5 whenever
the pump is shut off, before installing, cleaning,
adjusting, removing or servicing the valve or any
part of the system, and whenever you stop
spraying.
NOTE: Check all possible remedies in the table below
before you disassemble the valve.
Problem Cause Solution
No pressure regulation Damaged diaphragm (26 or 27).
Damaged valve actuator (9).
Replace diaphragm. See page 7.
Replace valve actuator. See page 7.
Pressure creeps above
setting
Damaged diaphragm (26 or 27).
Ball (5) or seat (6) leaking or dirty.
Replace diaphragm. See page 7.
Replace the cartridge or clean seat.
See page 7.
Pressure drops below setting Empty/clogged supply line.
Using valve beyond its rated flow
capacity. See page 13.
Fill/flush supply line.
Install valve for each spray gun or
dispensing valve.
Fluid leaks from under spring
housing (16)
Loose spring housing.
Damaged diaphragm (26 or 27).
Tighten screws (19) in sequence and to
torque shown in Fig. 2 on page 7.
Replace diaphragm. See page 7.
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10 307886
Parts Drawing
25{
7*
8*
6*
4*
5*
3*
2*
1*
24
19
lubricate
lubricate
Torque to 30 to 35 ft-lb
(41 to 47 N-m)
Apply medium strength sealant.
Torque to 60 to 70 in-lb (7 to 8 N-m).
Torque in sequence
shown in Fig. 2.
**27
**9
**26
14
lubricate
15
14
lubricate
16
18
17
12
13
Ref No. Qty
11
21
31
41
51
61
71
81
lubricate
lubricate
*Valve Cartridge Repair Kit 222140
Includes the following:
7532A
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