Graco C Series User manual

01583
INSTRUCTIONS–P ARTS LIST 307–134
Rev. C
Supersedes B
This manual contains IMPORT ANT
W
ARNINGS AND INSTRUCTIONS
READ AND RET AIN FOR REFERENCE
STAINLESS STEEL, WATERBASE COMPATIBLE
FLUID PRESSURE REGULA TOR
250 psi (18 bar) MAXIMUM INLET PRESSURE
5 to 100 psi (0.3 to 7 bar) REGULA TED PRESSURE RANGE
Model 209–030, Series C
For accurate, positive control of fluid pressure to one low
pressure spray gun, dispensing valve or atomizing head.
CONTENTS
Safety W arnings 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical Installation 3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Charts 5. . . . . . . . . . . . . . . . . . . . . . .
Service 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Drawing 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensional Drawing 10. . . . . . . . . . . . . . . . . . . . . . . . .
Warranty Back Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Graco Phone Numbers Back Page . . . . . . . . . . . . . . . .
Technical Data Back Page . . . . . . . . . . . . . . . . . . . . . . . .
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
 COPYRIGHT 1974 GRACO INC.

   
SAFETY W ARNINGS
FOR PROFESSIONAL USE ONLY. OBSERVE ALL WARNINGS
Read and understand all instruction manuals before operating equipment.
General Safety
Any misuse of the equipment or accessories, such as
overpressurizing, modifying parts, using incompatible
chemicals and fluids, or using worn or damaged parts,
can
cause them to rupture and result in serious bodily in -
jury,
such as splashing fluid in the eyes or on the skin, or
in fire, explosion or property damage.
ALWAYS relieve all fluid pressure in the system before
removing
or servicing the regulator . Close the fluid shut-
off valve and relieve fluid pressure downstream of the
regulator.
NEVER try to stop or deflect leaks with your hand or
body.
NEVER alter or modify any part of this equipment; doing
so could cause it to malfunction.
CHECK the regulator weekly and repair or replace worn
or damaged parts immediately .
Read
and follow the fluid and solvent manufacturer ’s lit -
erature
regarding the use of protective eyewear , gloves,
clothing, respirator and other equipment.
Fluid Compatibility
BE SURE all fluids and solvents used are chemically
compatible with the “W etted Parts” shown in the TECH-
NICAL
DA TA on the back cover and with the wetted parts
in all other system components. Always read the fluid
and solvent manufacturer’s literature before using the
fluid/solvent
in this regulator .
System Pressure
Use this regulator only in low pressure, air spray sys-
tems. NEVER exceed the 250 psi (18 bar) MAXIMUM
INLET PRESSURE
of this regulator. DO NOT exceed
the maximum working pressure of any component or
accessory
used in your system.

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TYPICAL INSTALLATION
Fig 1
01584
KEY
AFluid
Supply Line
B Regulator Inlet Ball V alve
C Fluid Regulator
D Regulator Outlet Ball V alve
E
Fluid Hose
FSpray Gun
G Fluid Return Line
HBack Pressure Valve
J
Air Regulator
K Air Filter
A
B
C
D
F
G
H
J
E
K
INSTALLATION
NOTE: Reference numbers and letters in parentheses in
the text refer to the numbers and letters in the figure
drawings
and parts drawing.
Before Installing the Fluid Regulator
1. Determine the placement of the fluid regulator in your
system. install it as close as possible to the spray
gun/dispensing valve (F) for easy operator control.
See
Fig 1.
2. Install a ball valve at the inlet (B) and outlet (D) of the
regulator (C) to isolate the regulator to remove it for
cleaning.
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.
CAUTION
1. To avoid contaminants clogging or damaging
the regulator, the new system must be
cleaned and tested thoroughly before
admitting
paint to the regulator .
2. Do not pressure test the regulator with air; use
solvent. Air may cause leaks between the fluid
seals that result in fluid leaks during normal
operation. If the rest of the system must be
pressure
tested with air , bypass the regulator
during the test.
Installing the Fluid Regulator
1. Remove the temporary plumbing and install one
regulator
(C) for each spray gun (F). See page10 for
regulator dimensions.
The regulators should be mounted in a vertical posi -
tion,
as shown above, for the best flow and minimum
pigment settling and so the gauge can be easily read.
2. Connect the fluid supply line (A) to the regulator ’ s 3/8
npt(f) swivel inlet. The swivel-type inlet can be con-
nected
to either a vertical or horizontal supply line.
3. Connect the fluid hose (E) between the spray gun
and
one of the two regulator outlets.
To allow either vertical or horizontal spray gun hose
connection, the regulator has one 3/8 npsm(f) verti -
cal
outlet and one (alternate plugged) 3/8 npt(f) hori -
zontal
outlet. Choose the outlet most convenient for
your system.
4. Put sealer on threaded connections, except on
swivel
unions as it interferes with the swivel action.
5. Flush and test the entire system. Be sure to follow
the CAUTION at left and the flushing procedure on
page
4.

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OPERATION
CAUTION
Do not exceed the regulated pressure
specification of your regulator. Pressures higher
than
specified could damage the gauge.
Regulating Fluid Pressure
1. Before opening the fluid ball valve or starting the
pump,
insert the hex end of the regulator key (27) into
the adjusting screw (9) and turn it counterclockwise,
all the way, to relieve the spring tension. See Fig 2,
Regulating Position.
2. Start the pump and open the fluid ball valve (B) to ad -
mit
fluid to the regulator inlet. See Fig 1.
3. Turn the key clockwise until the desired fluid pres-
sure
shows on the regulator gauge.
Fig 2 01585
Bypass Position Regulating Position
27-A27-B
KEY
27-A Hex
Key with threaded end inserted
27-B Hex Key with hex end inserted
Flushing Procedure
1. Flush the regulator with a compatible solvent when
the
rest of the system is flushed.
2. Shut of f the supply pump and relieve fluid pressure in
the system by opening the back pressure valve (H) or
other bypass valve. See Fig 1.
3. Screw the threaded end of the adjusting key (27), as
far as possible into the regulator cap to open the
regulator
valve. See Fig 2, Bypass Position .
4. Flush until thoroughly clean. Always use the lowest
possible
pressure when flushing.
5. After flushing, remove the adjusting key . Do not use
the threaded end of the key to adjust pressure.

307-1345
TROUBLESHOOTING CHART
WARNING
Pressure
Relief Procedure
To reduce the risk of serious bodily injury , including
fluid splashing in the eyes or on the skin, before
servicing the regulator, always close the fluid
shut-off valve and relieve fluid pressure
downstream
of the regulator .
NOTES:
1. Check all possible remedies in the Troubleshooting
Chart
before disassembling the regulator .
2. Reference
numbers in parentheses in the chart refer
to the numbers in the figure drawings and parts draw -
ing. See the SERVICE Section to repair the regula-
tor.
Damaged diaphragm (26).
Replace diaphragm.
Broken spring (14) Replace spring.
Loose cap (19). T ighten screws (1).
W orn or damaged gasket (25). Replace gasket.
Worn or damaged diaphragm (26). Replace diaphragm.
Fluid flow shut-of f downstream of Open fluid flow downstream.
fluid regulator .
Loose cap (19). T ighten screws (1).
W orn or damaged gasket (25). Replace gasket.
Worn or damaged diaphragm (26). Replace diaphragm.
Empty/clogged supply line Fill/flush supply line.
Clogged air spray gun or fluid Replace, see gun or valve manual
dispensing valve. for service instruction.
Using regulator beyond its rated flow Install additional regulators.
capacity , see back cover .
Loose cap (19). T ighten screws (1).
W orn or damaged gasket (25). Replace gasket.
Clogged supply line Flush supply line.
Clogged air spray gun or fluid Replace, see gun or valve manual
dispensing valve. for service instruction.
PROBLEM: CAUSE SOLUTION
No pressure regulation
Fluid leaks from under
housing (1)
Pressure creeps above
setting
Pressure drops below
setting

6   307-134
SERVICE
Disassembly
1. Follow the Pressure Relief Procedure W arning on
page 2 before servicing the regulator .
2.
Remove the regulator from the system.
3. Using the hex end of the key (27) turn the adjusting
screw (9) all the way counterclockwise to relieve
spring
tension. See Fig 2, Regulating Position.
4.
Remove the adapter nut (15). See Fig 3.
5. Unscrew the valve stem (28) with the key (27).
6. Remove the screws (1), cap (19), adjusting screw
(9),
and spring (14).
7. Lift the diaphragm (26) and hanger (21) assembly
from the housing; do not disassemble the parts
unless
they are damaged.
8. Unscrew the valve seat (30) with a 9/16 in. socket
wrench.
9. Thoroughly clean all parts with compatible solvent
and inspect for wear or damage. Replace all parts
that appear to be worn or damaged.
CAUTION
Use special care when handling the valve stem
(28) and seat (30) to avoid damaging the hard
carbide
parts.
Assembly CAUTION
When assembling the diaphragm and hanger, be
sure
all surfaces are clean and smooth. Any dirt or
roughness could damage the diaphragm.
NOTE: Follow the assembly notes in Fig 3.
1. Install the valve seat (30) and washer (10). Torque
the
valve seat to 70–80 in-lb (7.9–9.0 N Sm).
2. If
the diaphragm (26) and hanger (21) assembly was
disassembled, be sure to correctly align the hanger
(21), gaskets (24 & 25), diaphragm (26), and plate
(13)
as shown in Fig 3.
Apply anaerobic pipe sealant to the plate screws (5)
threads and torque them to 30–35 in-lb (3.4–4.0
NSm).
3. Hold the hanger (21) and valve stem (28) in place
with
your finger so the valve stem is correctly aligned
with the valve seat (30) and install the hanger in the
housing.
4. Turn the valve stem (28) until it is snug against the
seat (30), then back it off 3/4 turn to set the valve
clearance.
5. Assemble
the remaining parts.
a. When installing the regulator cap (19), line up the
adjusting nut tab (8) with the notch in the cap.
b. Torque the screws (1) in the order shown in Fig 3
Bottom V iew , to 125 in-lb (14 N S m) three times,
consecutively, to compensate for diaphragm
relaxation.
c. Apply TFE sealant tape to the adapter nut (15)
threads
and torque it to 30–35 ft-lb 40.50–47.25
NSm).

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SERVICE
1
BOTTOM VIEW
64
2
5
3
1
Fig 3
01588
NOTE: Numbers indicate tight -
ening sequence.
NOTES:
Apply lubricant
Apply TFE Sealant T ape to threads
Torque to 125 in-lb (14 Nm) three times, consecu-
tively,
in order shown in BOTTOM VIEW
Apply anaerobic pipe sealant (white) to threads
T orque to 30–35 in-lb (3.4–4.0 N Sm)
T
orque to 70–80 in-lb (7.9–9.0 N Sm)
T
orque to 30–35 in-lb (40.50–47.25 N Sm)
Turn
valve stem snugly against the seat, then back it
off 3/4 turn
P
TFE side down
A
B
C
D
E
F
G
H
BC
A
A
A
A
A
27
19
18
4
3
9
8
14
17
23
11
B
B
5
12*
13
26*
J
24*
25*
21*
16
29
*28
2
*10
30*
22*
15
20
A
DE
J
H
BF
B
G
B
01586
C

8   307-134
PARTS DRA WING
1
01588
27
19
18
4
3
9
8
14
17
23
11
5
12*
13
26*
24*
25*
21*
16
29
*28
2
*10
30*
22*
15
20

307-1349
PARTS LIST
REF
NO. P ART NO. DESCRIPTION QTY
1 101–682 SCREW
, soc hd cap; 1/4-20 x 5/8” 6
2 101–748
PLUG, pipe; soc hd; 3/8 npt 1
3 101–971 W
ASHER, thrust 1
4 101–972 BEARING 1
5 103–962 SCREW
, pan hd mach;
no. 10-32 x 1/4” 4
8 161–349 NUT
, adjusting 1
9 164–863 SCREW
, adjusting 1
10* 166–964 W
ASHER, non-metallic
11 187–877 TUBE, gauge mounting 1
12* 171–111 SEAL 4
13 171–119 PLA
TE, diaphragm 1
14 171–186
SPRING, compression 1
15 171–190 NUT
, adapter 1
16 171–191
HOUSING, fluid regulator 1
17 171–192
GUIDE, spring 1
18 171–193 W
ASHER, plain 1
19 171–194 CAP
, fluid regulator 1
20 171–195
NIPPLE; 3/8 npsm x 3/8 npt 1
21* 171–197 HANGER 1
22* 171–198 GASKET 1
23* 171–200
GAUGE; 0-100 psi (0-7 bar) range 1
24* 171–913 GASKET
; cellulose fibre 1
25* 171–912 GASKET
; cellulose fibre 1
26* 172–194
DIAPHRAGM; PTFE face 1
27 204–522 KEY
, regulating 1
28* 205–183
STEM, valve 1
29 209–029
UNION, 45 _ swivel; 3/8 npt(m x f) 1
30 212–030 SEAT
, valve 1
* Recommended “tool box” spare parts. Keep on hand to
reduce
down time.
ACCESSORIES
Accessories must be purchased separately .
Use only GENUINE GRACO P ARTS AND ACCESSORIES.
BALL V ALVE 208–937
500 psi (35 bar) MAXIMUM WORKING PRESSURE
Stainless steel fluid shut-of f valve
3/8 npsm(m) x 3/8 npt(f)
COUPLER STEM 208–087
200 psi (14 bar) MAXIMUM WORKING PRESSURE
Connects gun to circulating adapter , Stainless steel
CIRCULATING ADAPTER 210–017
200 psi (14 bar) MAXIMUM WORKING PRESSURE
Connects fluid line to gun and circulates fluid,
Stainless steel
HOSE COUPLINGS
With spring guard
103–990 1/4 ID hose x 1/4 npsm(f)
103–991 1/4 ID hose x 3/8 npsm(f)

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DIMENSIONAL DRA WING
3/8 npt INLET
3.875”
(85.6 mm)
DIA.
3/8 npsm OUTLET
9.75”
(248 mm)
01587
5.50”
(140 mm)
0.875”
(22.2 mm)
3/8 npt
ALTERNATE
OUTLET
MANUAL CHANGE SUMMAR Y
This manual was changed from Rev B to Rev C to change
the torque note on the cap screw , part no. 101–682 (item
1 in the parts list) and to change the gauge mounting tube
(item 1 1) part no. from 170–745 to 187–877.