Instructions–Parts List
STAINLESS STEEL,
WATERBASE-COMPATIBLE, HIGH PRESSURE
308647P
Fluid Pressure Regulators
EN
For precise downstream pressure and flow control.
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
See page 2 for List of Models and Table of Contents.
06290
06288
Model 238894
(air-operated)
Model 238890,
238892
(spring-operated)
U.S. Patent No. 4942899
06540A
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Symbols
Warning Symbol
Caution Symbol
WARNING
CAUTION
This symbol alerts you to the possibility of serious
injury or death if you do not follow the instructions.
This symbol alerts you to the possibility of damage to
or destruction of equipment if you do not follow the
instructions.
WARNING
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.
D This equipment is for professional use only.
INSTRUCTIONS
D Read all instruction manuals, tags, and labels before operating the equipment.
D Use the equipment only for its intended purpose. If you are not sure, call your Graco distributor.
D Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
D Check equipment daily. Repair or replace worn or damaged parts immediately.
D Do not kink or over bend the hose or use the hose to pull equipment.
D Do not exceed the maximum working pressure of the lowest rated component in your system. Do
not exceed 6000 psi (41 MPa, 414 bar) maximum fluid inlet pressure of the regulator or the
maximum working pressure of the lowest-rated component in your system.
D Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the
Technical Data section of all equipment manuals. Read the fluid and solvent manufacturer’s
warnings.
D Always wear protective eyewear, gloves, clothing, and respirator as recommended by the fluid and
solvent manufacturer.
D Comply with all applicable local, state, and national fire, electrical, and safety regulations.
308647
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WARNING
SKIN 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.
D Fluid injected into the skin might look like just a cut, but it is a serious injury. Get immediate
surgical treatment.
D Do not point the gun at anyone or at any part of the body.
D Do not put your hand or fingers over the spray gun tip or extruder gun tip.
D Do not stop or deflect leaks with your hand, body, glove or rag.
D Always have the tip guard and the trigger guard on the gun when spraying.
D Check the gun diffuser operation weekly. Refer to the gun manual.
D Be sure the gun trigger safety operates before spraying.
D Lock the gun trigger safety when you stop dispensing.
D Follow the Pressure Relief Procedure on page 7 if the spray tip clogs and before cleaning,
checking, or servicing the equipment.
D Tighten all fluid connections before operating the equipment.
D Check the hoses, tubes, and couplings daily. Replace worn or damaged parts immediately. Do not
repair high pressure couplings; you must replace the entire hose.
D Fluid hoses must have spring guards on both ends to help protect them from rupture caused by
kinks or bends near the couplings.
HALOGENATED HYDROCARBON HAZARD
Never use 1,1,1–trichloroethane, methylene chloride, other halogenated hydrocarbon solvents, or
fluids containing such solvents in these regulators. In the unlikely event that there is a diaphragm
failure and the vent hole in the aluminum spring cap is plugged, a serious chemical reaction could
occur, with the possibility of explosion, which could cause death, serious injury, and/or substantial
property damage.
Consult your fluid suppliers to ensure that the fluids used are compatible with aluminum parts.
TOXIC FLUID HAZARD
Graco does not manufacture or supply the reactive chemical components that may be used in this
equipment and is not responsible for injury or property loss, damage, expense or claims (direct or
consequential) that arise from the use of such chemical components.
4
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Notes
308647
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Installation
Multiple Circulating Spray Station
M
E
F
K
Key
C
A
B
C
D
E
F
Air regulator
Bleed-type master air valve
Pump
Fluid filter and drain valve
Main fluid supply line
Gun fluid supply line
J
L
J
A
B
K
G Fluid regulator
with fluid pressure gauge (H)
H
J
K
L
Fluid pressure gauge
Air-assisted airless spray gun
Back pressure valve
Fluid return line
G
G
H
H
M Main circulating line
06461
N
P
Fluid supply container
Drain valve
P
P
N
D
Single Direct Spray Station
C
B
A
J
G
WARNING
Do not use PTFE tape on pipe threads. Such use
could cause a hazardous condition due to loss of
grounding continuity. Also, if pieces of the tape break
off, the function of the regulator could be affected.
H
F
06462
P
D
Fig. 1
The installations shown in Fig. 1 are only a guide for
selecting and installing a circulating or direct system;
they are not actual system designs. Contact your
Graco distributor for assistance in designing a system
to suit your needs.
Apply pipe sealant to the male pipe threads, and
connect the fluid supply line (F) to the fluid regulator’s
3/8 npt(f) inlet. Connect the line from the gun (J) to the
fluid regulator’s 3/8 npt(f) outlet. Install the gauge or
plug into the 1/4 npt(f) gauge port.
NOTE: Before you install the regulator, thoroughly
flush the system to remove metal chips and other
contaminants. A fluid filter (D) of 60-mesh or finer
should always be installed upstream of the regulator.
Make sure the direction of fluid flow agrees with the IN
and OUT markings on the regulator body.
Flush the System
The regulator was tested in lightweight oil. Flush the
entire system with a solvent compatible with the fluid
being dispensed. Then test the system.
Connections
Install the fluid regulator (G) in the spray gun fluid
supply line (F), as shown in the typical installation
drawings on this page. Connect only one spray gun
or dispensing valve to each fluid regulator.
Mounting Bracket
A Mounting Bracket is available for mounting the
regulator. Order Part 222515 for the bracket and
mounting hardware.
6
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Installation
Spray gun: Ground through connection to a properly
Grounding the System
grounded fluid hose and pump.
WARNING
FIRE AND EXPLOSION HAZARD
Before operating the fluid pressure
regulator, ground the system as
explained below.
Fluid supply container: Follow your local code.
Object being sprayed: Follow your local code.
Solvent pails used when flushing: Follow your local
code. Use only metal pails, which are conductive,
placed on a grounded surface. Do not place the pail on
a nonconductive surface, such as paper or cardboard,
which interrupts the grounding continuity.
Pump: Use a ground wire and clamp. Loosen the
grounding lug locknut (W) and washer (X). Insert one
end of a 1.5 mm@ (12 ga) minimum ground wire (Y)
into the slot in lug (Z) and tighten the locknut securely.
Connect the other end of the wire to a true earth
ground. Order Part 237569 Ground Wire and Clamp.
To maintain grounding continuity when flushing or
relieving pressure, hold a metal part of the spray gun
firmly to the side of a grounded metal pail, then trigger
the gun.
Pressure Relief Procedure
W
WARNING
SKIN INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
X
Y
Z
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
0864
Fig. 2
D Are instructed to relieve the pressure
D Stop spraying
Air and fluid hoses: Use only electrically conductive
hoses.
D Check or service any of the system equipment
D Install or clean the spray tips
Heaters, if used: See the heater instruction manual.
Air compressor: Follow manufacturer’s
recommendations.
308647
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Operation
Adjusting the System Pressure
2. Adjust the pump air pressure and fluid regulator for
the desired spray pattern. Use the lowest possible
air and fluid pressures for your application. For
optimum performance, the inbound fluid pressure
should be at least 500 psi (3.4 MPa, 34 bar) above
the regulated fluid pressure.
CAUTION
D The new system must be cleaned and tested
thoroughly before admitting fluid to the regulator
to avoid contaminants clogging or damaging the
regulator.
NOTE: Do not exceed a 2000 psi (14 MPa,
138 bar) pressure drop between the regulator inlet
and outlet. Excessive pressure drop will cause
premature regulator component wear.
D Always use the lowest possible air and fluid
pressures for your application. High pressures
can cause premature spray tip, regulator, and
pump wear.
For example: With 3500 psi (24.5 MPa, 245 bar)
to the regulator, the minimum regulated outlet
pressure would be 1500 psi (10.5 MPa, 105 bar).
NOTES:
D The fluid pressure regulator controls pressure
downstream from its outlet.
3. In a circulating system, also adjust the back
pressure valve (K).
D If you are using an accessory fluid pressure gauge
(H in Fig. 1), relieve the spray gun line pressure
after you reduce the regulator pressure to ensure a
correct gauge reading.
4. Record all the settings for future reference.
Cleaning the Regulator
Do not allow fluid to settle in the system.
1. Make a note of the proper way to adjust pressure,
from the following descriptions:
Flush the regulator whenever the rest of the system is
flushed (see page 9). Before you flush the system,
follow the Pressure Relief Procedure on page 7,
then completely decrease the regulated fluid pressure.
See step 1 in Adjusting the System Pressure, at left.
D On a spring-operated regulator, turn the
adjusting screw (10) counterclockwise to
decrease pressure and clockwise to increase
pressure to the spray gun or extruder gun.
Before you remove the regulator for thorough cleaning
and inspection, follow the Pressure Relief Procedure
on page 7. Then remove the regulator, clean it, and
inspect all parts.
D On an air-operated regulator, increase supply
air pressure to increase fluid pressure.
Decrease supply air pressure to decrease fluid
pressure. Supply air up to 100 psi (0.7 MPa,
7 bar). See the chart on page 20 for air versus
fluid pressure.
NOTE: Air-operated regulator Models 238893 and
238894 are provided with an air supply regulator
(31) to control the fluid set pressure. For
increased sensitivity in pressure set point
performance, an alternative air regulator, such as
Part 206197, may be used. This alternative air
regulator uses a sensitive diaphragm design to
maintain a higher, more accurate air pressure
setting.
8
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Operation
4. Open the fluid regulator fully.
Flushing
D Flush before changing colors, before fluid can dry in
the equipment, at the end of the day, before storing,
and before repairing equipment.
a. Spring Operated Regulators Only: Open the
fluid regulator by turning the adjusting screw
(10) fully clockwise.
D Flush at the lowest pressure possible. Check
b. Air Operated Regulator Only: Increase the air
regulator setting to fully open the fluid
connectors for leaks and tighten as necessary.
regulator. You will have to reset the fluid
regulator’s pressure setting after flushing.
D Flush with a fluid that is compatible with the fluid
being dispensed and the equipment wetted parts.
5. Supply solvent to the system. Set pump to the
lowest possible pressure, and start pump.
1. Record the pressure adjustment setting of the fluid
regulator before flushing.
6. Flush until thoroughly clean.
2. Shut off the pump and relieve fluid pressure in the
system by triggering the gun and opening the back
pressure regulator or other bypass valve.
7. Adjust the fluid regulator to the desired setting.
a. Spring Operated Regulators Only: Turn the
adjustment screw (10) counterclockwise to
return to the desired pressure setting.
3. Never exceed the maximum working pressure of
the lowest rated system component. Remove the
gauge if the flushing pressure will exceed the
gauge range.
b. Air Operated Regulator Only: Adjust the air
regulator to return to the desired fluid pressure
setting.
308647
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Troubleshooting
NOTE: Check all possible solutions in the chart below
before you disassemble the regulator.
WARNING
To reduce the risk of serious bodily injury, including
skin injection, splashing in the eyes or on the skin,
or injury from moving parts, always follow the Pres-
sure Relief Procedure on page 5 whenever the
pump is shut off, before installing, cleaning, adjust-
ing, removing, or servicing the valve or any part of
the system, and whenever you stop dispensing.
Problem
Cause
Solution
No pressure regulation
Damaged diaphragm
Leaking or dirty seat
Damaged valve actuator
Replace diaphragm.
Replace cartridge, or clean seat.
Replace valve actuator.
Replace cartridge, or clean seat area.
No fluid flow
Metal chip or contamination
between ball and seat
Pressure creeps above
setting
Damaged diaphragm
Replace diaphragm.
Damaged o-ring or improper seal
Replace the o-ring under the seat.
Damaged or clogged air regulator or Clear obstruction in line. Service regula-
line (air-operated regulator only)
Leaking or dirty seat
tor if necessary.
Replace cartridge, or clean seat.
Stabilize regulator inlet pressure.
Fill/flush supply line.
Large change in inlet pressure
Empty/clogged supply line
Pressure drops below
setting
Damaged or clogged air regulator or Clear obstruction in line. Service regula-
line (air-operated regulator only)
tor if necessary.
Using valve beyond its rated flow
capacity
Install valve for each spray gun or
dispensing valve.
Large change in inlet pressure
Loose fluid housing
Stabilize regulator inlet pressure.
Tighten the four cap screws.
Fluid leaks from spring
housing
Damaged diaphragm
Replace diaphragm.
Chatter
Excessive pressure differential
between pump and gun
Reduce pump pressure to not more than
2000 psi (14 MPa, 138 bar) greater than
required gun pressure.
Excessive flow rate
Reduce fluid flow through regulator.
Connect only one spray gun or dispens-
ing valve to each fluid regulator.
10
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Service
Service Kits
Installing the Air-Operated Conversion Kit
(See Parts Drawings on pages 14–16)
For the Fluid Diaphragm Repair Kit, order Part 238747.
Parts included in this kit are marked with an asterisk,
for example (7*), in the Parts Drawings and Lists on
pages 14 and 16.
1. Relieve the pressure.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
For the Cartridge Repair Kit, order Part 238748 for all
models except 248090. Parts included in this kit are
marked with a dagger, for example (3{), in the Parts
Drawings and Lists on pages 14 and 16.
For the Cartridge Repair Kit for 248090, order Part
248098. Parts included in this kit are marked with a
checkmark, for example (3n), in the Parts Drawings
and Lists on pages 14 and 16.
2. On the spring-operated regulator, turn the
adjusting screw (10) counterclockwise until it is
loose enough to fully relieve the spring tension.
3. Use a strap wrench or an equivalent wrench to
loosen and remove the spring cover (2), spring
retainers (6 and 27), and spring (11).
To convert from a spring-operated to an air-operated
regulator, order the Air-Operated Conversion Kit, Part
238749. Parts included in this kit are marked with a
double dagger, for example (37}), in the Parts
Drawings and Lists on pages 14 and 16.
4. Place the stabilizing spring (22) of the air-operated
regulator on the piston rod (6). Install the
conversion kit assembly onto the backing plate (8).
NOTE: To convert from a medium-pressure-range,
spring-operated model to a high-pressure-range,
spring-operated model (or vice versa), order the
appropriate spring (11) from the Parts List on
page 15.
Torque to 15 to 20 ft-lb (20 to 27 NSm).
5. Plumb an air line up to the 1/4 npt(m) threads of
the nipple (35) on the air regulator.
6. Flush the system (see page 9), and set the
regulator pressure by following the procedure in
Adjusting the System Pressure on page 8.
308647
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Service
6. Remove the o-ring (17) from the groove in the
Replacing the Fluid Diaphragms
base housing (4), clean and inspect the base
housing, and replace if necessary.
See Fig. 3, and follow the steps below. For parts that
are not called out in Fig. 3, see the Parts Drawing on
page 14.
7. Install a new o-ring (17) in the groove in the base
housing (4).
1. Relieve the pressure, and remove the regulator
from the fluid line.
8. Lightly lubricate the backing plate (8) bore and
plunger (7) with a lithium-based grease.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
9. Install the new, pre-assembled diaphragm
subassembly into the backing plate (8).
NOTE: The diaphragms will have a bow in them
before you install them.
2. Turn the adjusting screw (10) counterclockwise
10. Align the holes in the diaphragms with the backing
plate (8).
until it is loose to fully relieve the spring tension.
3. Remove the four base housing screws (9) from the
base housing (4), and pull the base housing free of
the backing plate (8).
11. Install the backing plate/diaphragms assembly
over the base housing (4). Hold the backing plate
(8) tightly against the base housing, and install the
four base housing screws (9).
4. Remove the diaphragm and valve actuator
subassembly (1, 7, 12, 13, and 19).
12. Torque the base housing screws (9) first to 20 to
25 ft-lb (27 to 34 NSm), then to 30 to 35 ft-lb (41 to
48 NSm) in the sequence shown in Fig. 3.
5. Clean and inspect the bore in the backing plate (8)
for wear, and replace it if necessary.
10
2
Torque Sequence for Regulator
Base Housing Screws (9)
17
4
1
4
2
3
3
backing
plate (8)
cartridge
5
assembly
diaphragm
and valve
actuator
subassembly
9
06656
Fig. 3
12
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Service
NOTE: The retaining nut (3) often loosens when
Replacing the Cartridge
removing the cartridge assembly from the base
housing. Be sure to re–torque as described in
step 4.
See Fig. 3, and follow the steps below. For parts that
are not called out in Fig. 3, see the Parts Drawing on
page 14.
3. Inspect and clean the internal walls of the base
housing (4).
CAUTION
Handle the hard carbide parts, which are the ball
(16), valve actuator (1), and valve seat (14), carefully
to avoid damaging them.
NOTE: Be careful that you do not scrape or
gouge the internal walls of the base housing,
because they are sealing surfaces.
4. Re-torque the retaining nut (3) to 140 to 160 in-lb
1. Relieve the pressure.
(16 to 18 NSm).
NOTE: You must re-torque the retaining nut
before you install it in the base housing in step 5.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
5. Install the new cartridge assembly in the base
housing (4), and torque the valve housing (5) to 30
to 35 ft-lb (41 to 48 NSm).
2. Remove the cartridge assembly by loosening the
valve housing (5) with a 6 mm hex wrench and
pulling the cartridge assembly out of the base
housing (4).
NOTE: The valve seat (14) is double sided and
may be reversed for extended life. The o-rings
(15, 18 and 20) and ball (16) must be replaced.
308647
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Parts Drawing
Models 238889, 238890, 238891, and 238892
238889 with EZ Flush gauge port plug
238890 with fluid pressure gauge
238891 with EZ Flush gauge port plug
238892 with fluid pressure gauge
Spring-Operated Regulator
Spring-Operated Regulator
500 to 3000 psi (3.4 to 21 MPa, 34 to 207 bar)
Regulated Fluid Outlet Pressure
3000 to 5000 psi (21 to 34 MPa, 207 to 345 bar)
Regulated Fluid Outlet Pressure
7*
6
10
6
12*
13*
2
3
19*
1*
1
17*
4
6
27
30
29
6
11
3{
2
14{
15{
6
28
20{
7
7
9
5
18{
8
16{
21{
5{
4
06289
DETAIL
Torque to 25 to 30 in-lb (2.8 to 3.4 NSm).
Torque to 140 to 160 in-lb (16 to 18 NSm).
Torque to 10 to 20 ft-lb (14 to 27 NSm).
1
2
3
4
5
Torque Sequence for Regulator
Base Housing Screws (9)
4
1
Torque to 30 to 35 ft-lb (41 to 48 NSm).
Torque first to 20 to 25 ft-lb (27 to 34 NSm), then to 30 to 35
ft-lb (41 to 48 NSm) in the sequence shown in DETAIL at left.
Apply lithium-based grease when reassembling.
Apply a fluid-compatible grease to aid in reassembly.
6
7
2
3
14
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Parts List
Models 238889, 238890, 238891, and 238892
Ref. Part No. Description
Qty.
Ref. Part No. Description
Qty.
1
2
3{
4
5{
6
7
8
9
*
ACTUATOR
COVER, spring
1
1
1
1
1
1
1
1
18{
19
20{
21{
23
107079
*
109450
111858
113634
O-RING, packing; PTFE 019
O-RING, packing; PTFE 013
O-RING, packing; PTFE 016
SPRING, compression
WRENCH, hex; 6 mm
(not shown)
RETAINER, spring, sleeve
GAUGE, pressure
for Model 238890
GAUGE, pressure
for Model 238892
PLUG, EZ Flush (includes Ref. 30)
for Models 238889 & 238891
O-RING, packing; PTFE 007
1
1
1
1
238858
191577
191578
191579
191580
*
NUT, spring retainer
BASE HOUSING; sst
VALVE HOUSING; sst
RETAINER, spring, guide
PLUNGER, spring
PLATE, backing
BASE HOUSING SCREW,
cap, socket-head; M10 x 1.5 x 70 4
ADJUSTING SCREW, cap,
socket-head; M8 x 1.25 x 45
SPRING, compression; red
for Models 238889 & 238890
SPRING, compression; yellow
for Models 238891 & 238892
DIAPHRAGM, regulator; TPE
cream colored
DIAPHRAGM, regulator; PTFE
white
SEAT, valve
1
1
27
28
191919
113641
191583
113623
1
1
113654
238896
107509
10
113624
1
1
1
1
29
11}
113625
1
1
30
*
113626
Included in Fluid Diaphragm Repair Kit 238747
Included in Cartridge Repair Kit 238748
{
12
13
*
*
}
To convert to a higher or lower pressure range,
order one of the following compression springs:
113625
500 to 3000 psi
(3.4 to 21 MPa, 34 to 207 bar
3000 to 5000 psi
(21 to 34 MPa, 207 to 345 bar)
1
1
1
1
1
14{
15{
16{
17*
191914
113651
112365
109213
113626
O-RING, packing; PTFE
BALL
O-RING, packing; PTFE 025
308647
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Parts Drawing
Models 238893, 238894, 248090, and 255072
238893 with EZ Flush gauge port plug
}35
238894 with fluid pressure gauge
248090 with fluid pressure gauge for
LASD material
32}
}2
}31
3
}33
}28
255072 High Resolution
Air-Operated Regulator
6
11}
100 psi (0.7 MPa, 7 bar)
Maximum Inbound Air Pressure
7
}6
}34
500 to 4000 psi (3.4 to 28 MPa, 34 to 276 bar)
Regulated Fluid Outlet Pressure
}22
8
}37
7*
7
12*
13*
19*
}30
}36
8
DETAIL OF MODEL 248090
1*
1
41
39
42
4
17*
38
4
42
41
40
3{n
2
14{n
15{n
25
3
}29
25
20{n
7
5
9
18{n
16{n
7
21{n
5{n 4
06287
Torque to 25 to 30 in-lb (2.8 to 3.4 NSm).
Torque to 140 to 160 in-lb (16 to 18 NSm).
Torque to 15 to 20 ft-lb (20 to 27 NSm).
1
2
3
4
DETAIL
Torque Sequence for Regulator
Base Housing Screws (9)
Torque to 30 to 35 ft-lb (41 to 48 NSm).
Torque first to 20 to 25 ft-lb (27 to 34 NSm), then to 30 to 35
ft-lb (41 to 48 NSm) in the sequence shown in DETAIL at left.
5
6
4
1
First torque to 30–33 in-lb (3.4–3.7 NSm) in alternating pattern
then torque to 68–72 in-lb (7.7–8.1 NSm) in alternating pattern.
Apply lithium-based grease when reassembling.
7
2
3
Torque to 75 to 80 in-lb (8.4 to 9.0 NSm).
8
16
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Parts List
Models 238893, 238894, 248090, and 255072
Ref.
No.
Ref.
No.
Part No. Description
Qty.
Part No. Description
Qty.
1
2}
*
ACTUATOR
1
1
1
21{n 111858
SPRING, compression
SPRING, stabilizing
GAUGE, pressure
for Models 238894 and 248090
COVER, diaphragm
HOUSING, diaphragm
SCREW, machine
REGULATOR, air
PLUG, pipe
GAUGE, pressure, air
NIPPLE, pipe, hex
NIPPLE, reducing; 1/4 x 1/8 npt
WASHER, support
WASHER, for Model 255072
DIAPHRAGM; nylon, for Models
238893, 238894, and 248090
PLUG, EZ Flush (includes Ref. 39)
for Model 238893
O-RING, packing; PTFE 007
for Model 238893
RING, diaphragm,
for Model 255072
PLUG, pressure for Models
248090 and 255072
PACKING, o-ring; PTFE 012 for
Models 248090 and 255072
1
1
191584
HOUSING ADAPTER
NUT, spring retainer
HOUSING, base, for Models
238893 and 238894
HOUSING, base,
for Model 248090
HOUSING, base,
for Model 255072
VALVE HOUSING, sst
VALVE HOUSING,
for Model 255072
ROD, piston, for Models 238893,
238894, and 248090
ROD, piston, for Model 255072
PLUNGER, spring
PLATE, backing
BASE HOUSING SCREW,
cap, socket-head; M10 x 1.5 x 70 4
SCREW, machine
DIAPHRAGM, regulator; TPE
cream colored
DIAPHRAGM, regulator; PTFE
white
SEAT, valve
O-RING, packing; PTFE
BALL, for Models 238893 and
238894
BALL, for Models 248090 and
255072
O-RING, packing; PTFE 025
O-RING, packing; PTFE 019
O-RING, packing; PTFE 013
O-RING, packing; PTFE 016
22}
25
160062
113654
3{n 191577
4
191578
197952
15J923
1
1
1
1
1
1
1
1
1
1
1
1
1
28}z –––
29}z –––
30}
31}
32}
33}
34}
35}
36}
100326
110341
100403
108190
103656
151519
192194
15J921
1
1
5{n 191579
15J924
1
6}
191585
1
1
1
1
15J920
*
191583
113623
37}z 180979
7
8
9
1
38
39
40
41
42
238896
107509
15J922
198241
111457
1
1
1
2
2
11}z 114104
12
12
*
1
1
1
1
1
13
*
14{n 191914
15{n 113651
16{
112365
*
Included in Fluid Diaphragm Repair Kit 238747
Included in Cartridge Repair Kit 238748
Included in Air-Operated Conversion Kit 238749
Included in Cartridge Repair Kit 248098
Included in Diaphragm Housing Repair Kit
1
{
16n 15D092
}
1
1
1
1
1
17*
18{n 107079
19
20{n 109450
109213
n
z
*
16P596.
308647
17
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Parts Drawing
Model 244734
244734 with EZ Flush gauge port plug
40
11}
5
Air-Operated Regulator, Full Range
100 psi (0.7 MPa, 7 bar)
Maximum Inbound Air Pressure
}28
}37
500 to 4000 psi (3.4 to 28 MPa, 34 to 276 bar)
Regulated Fluid Outlet Pressure
}30
8
8
}36
7*
6
3
}29
12*
13*
19*
1*
1
}2
3
41
42
17*
4
39
42
6
}6
41
38
}22
3{
2
14{
7
15{
9
20{
6
6
18{
16{
21{
5{
Torque to 25 to 30 in-lb (2.8 to 3.4 NSm).
Torque to 140 to 160 in-lb (16 to 18 NSm).
Torque to 15 to 20 ft-lb (20 to 27 NSm).
Torque to 30 to 35 ft-lb (41 to 48 NSm).
1
2
3
4
4
TI1373
First torque to 30–33 in-lb (3.4–3.7 NSm) in alternating pattern
then torque to 68–72 in-lb (7.7–8.1 NSm) in alternating pattern.
5
6
DETAIL
Torque Sequence for Regulator
Base Housing Screws (9)
Apply lithium-based grease when reassembling.
2
3
Torque first to 20 to 25 ft-lb (27 to 34 NSm), then to 30 to 35
ft-lb (41 to 48 NSm) in the sequence shown in DETAIL at right.
7
8
Torque to 75 to 80 in-lb (8.4 to 9.0 NSm).
4
1
18
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Parts List
Model 244734
Ref.
No.
Ref.
No.
Part No. Description
Qty.
Part No. Description
Qty.
1
*
ACTUATOR
1
1
1
1
1
1
1
1
18{
19
20{
21{
22}
28}z –––
29}z –––
30}
36}
37}z 180979
38
39
40
41
42
107079
*
109450
111858
160062
O-RING, packing; PTFE 019
1
1
1
1
1
1
1
1
1
1
2}
3{
4
5{
6}
7
191584
191577
197952
191579
191585
*
HOUSING ADAPTER
NUT, spring retainer
REGULATOR HOUSING
VALVE HOUSING; sst
ROD, piston
PLUNGER, spring
PLATE, backing
BASE HOUSING SCREW,
cap, socket-head; M10 x 1.5 x 70 4
SCREW, machine; 1/4–20 x 1.0 12
DIAPHRAGM, regulator; PTE
cream colored
DIAPHRAGM, regulator; PTFE
O-RING, packing; PTFE 013
O-RING, packing; PTFE 016
SPRING, compression
SPRING, stabilizing
COVER, diaphragm
HOUSING, diaphragm
SCREW, machine; 1/4–20 x 1/2
WASHER, support
DIAPHRAGM; nylon
PLUG, EZ Flush (includes Ref. 39)1
O-RING, packing; PTFE 007
FITTING, elbow
PLUG, pressure
8
9
191583
113623
100326
192194
11}z 114104
12
238896
107509
198171
198241
111457
*
1
1
2
2
1
13
*
white
SEAT, valve
O-RING, packing; PTFE
BALL
O-RING, packing; PTFE 025
1
1
1
1
1
PACKING, o-ring; PTFE 012
14{
15{
16{
17*
191914
113651
15D092
109213
*
Included in Fluid Diaphragm Repair Kit 238747
Included in Cartridge Repair Kit 248098
{
}
z
Included in Air-Operated Conversion Kit 238749
Included in Diaphragm Housing Repair Kit
16P596.
308647
19
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Technical Data
Model 238890
Model 238892
Models 238894,
Model 244734
spring operated, with spring operated, with 248090, and 255072 air operated, with
fluid pressure gauge fluid pressure gauge air operated, with
pressure sensor
fluid pressure gauge ports
Model 238889
Model 238891
spring operated, with spring operated, with Model 238893
EZ Flush plug
EZ Flush plug
air operated, with EZ
Flush plug
Maximum fluid
inlet pressure
6000 psi
(41 MPa, 414 bar)
6000 psi
(41 MPa, 414 bar)
6000 psi
(41 MPa, 414 bar)
6000 psi
(41 MPa, 414 bar)
Regulated fluid
outlet pressure
range
500–3000 psi
(3.4–21 MPa,
34–207 bar)
3000–5000 psi
(21–34 MPa,
207–345 bar)
500–4000 psi
(3.4–28 MPa,
34–276 bar)
500–4000 psi
(3.4–28 MPa,
34–276 bar)
Maximum inbound ––
air pressure
––
100 psi
(0.7 MPa, 7 bar)
100 psi
(0.7 MPa, 7 bar)
Fluid inlet/outlet
size
3/8 npt(f)
3/8 npt(f)
3/8 npt(f)
1/2 npt(f)
1/2 npt(f) for 248090
1/4 npt(f)
Gauge port size
1/4 npt(f)
1/4 npt(f)
1/4 npt(f)
––
Fluid pressure
gauge (Models
238890, 238892,
and 238894)
0–3000 psi
(0–21 MPa,
0–207 bar)
0–5000 psi
(0–34 MPa,
0–345 bar)
0–5000 psi
(0–34 MPa,
0–345 bar)
Maximum flow
2 gpm (7.6 lpm)
up to 15,000 cp
120_ F (50_ C)
2 gpm (7.6 lpm)
up to 15,000 cp
120_ F (50_ C)
7.0 lb (3.2 kg)
2 gpm (7.6 lpm)
up to 15,000 cp
120_ F (50_ C)
11.7 lb (5.3 kg)
2 gpm (7.6 lpm)
up to 15,000 cp
120_ F (50_ C)
11.7 lb (5.3 kg)
(in 65 cp material)
Maximum fluid
viscosity
Maximum operat-
ing temperature
Weight (with gauge) 7.0 lb (3.2 kg)
Fluid diaphragms
PTFE with TPE
backing
PTFE with TPE
backing
PTFE with TPE
backing
PTFE with TPE
backing
Wetted parts (all
models)
304, 316, 17–4 passivated SST, nickel– and cobalt–bound tungsten carbide, PTFE for all
models; ceramic for model 248090, 244734, and 255072 only.
Adjustment tool
(spring-operated
models)
6 mm hex wrench
6 mm hex wrench
––
––
Air Requirements for Air-Operated Regulators
(Models 238893, 238894, 248090, and 255072)
The following table shows the approximate air pressure needed to regulate the air-operated regulator to a given
fluid outlet pressure.
Regulated Fluid Outlet Pressure
Models 238894, 248090,
and 255072
Model 255072
Air Pressure
MPa
psi
bar
psi
MPa
bar
psi
MPa
bar
28
49
0.19
0.34
0.48
0.62
0.68
1.9
3.4
4.8
6.2
6.8
1000
2000
3000
4000
4000
7
69
550
4
40
80
14
21
28
28
138
207
276
276
1150
1800
2450
2700
8
70
12
17
19
120
170
190
90
100
20
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Performance Chart
Fluid Pressure Regulators,
Models 238889 through 238894 and 248090
psi
(MPa, bar)
6000
(41, 414)
5000
(34, 345)
4000
(28, 276)
3000
(21, 207)
2000
(14, 138)
1000
(7, 69)
0
0.0
0.5
1.0
1.5
2.0
gpm
(lpm)
(1.9)
(3.8)
(5.7)
(7.6)
FLUID FLOW
Key
Test Conditions
65 cp oil
3000 cp oil
Regulators tested in oil at 70_ F (21_ C) and at
6000 psi (41 MPa, 414 bar) inbound fluid pressure.
308647
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Notes
22
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Dimensional Drawings
Models 238889 and 238891 with port plug
Models 238890 and 238892 with gauge
(spring operated)
3/8 npt
inlet
port
A
B
Height: 8.9 in. (225 mm)
Diameter of base housing: 2.65 in. (70 mm)
3/8 npt
outlet
port
1/4 npt
gauge
port
A
B
06290
1/4–20 UNC mounting holes,
1/2 in. (12 mm) deep (both sides)
Model 238893 with port plug
Model 238894 with gauge
Models 248090 and 255072 with gauge and
1/2 npt inlet and outlet ports
(air operated)
Model 244734
(air operated)
A
B
Height: 8.1 in. (206 mm)
A
Height: 10.0 in. (254 mm)
Diameter of diaphragm cover: 7.0 in. (179 mm)
B
Diameter of diaphragm cover: 7.0 in. (179 mm)
B
3/8 npt
(1/2 npt for
248090)
1/2 npt
outlet
B
port
A
inlet port
A
TI1372
1/2 npt
3/8 npt
(1/2 npt for 248090)
outlet port
06288
inlet port
1/4 npt
gauge port
1/4–20 UNC mounting holes,
1/2 in. (12 mm) deep (both sides)
1/4–20 UNC mounting holes,
1/2 in. (12 mm) deep (both sides)
308647
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Graco Standard Warranty
Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from
defects in material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended,
or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the
equipment determined by Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained
in accordance with Graco’s written recommendations.
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by
faulty installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or
substitution of non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of
Graco equipment with structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture,
installation, operation or maintenance of structures, accessories, equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for
verification of the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The
equipment will be returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect
in material or workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts, labor, and
transportation.
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT
NOT LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other
remedy (including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any
other incidental or consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the
date of sale.
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD
BUT NOT MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, switches,
hose, etc.), are subject to the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in
making any claim for breach of these warranties.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment
hereunder, or the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract,
breach of warranty, the negligence of Graco, or otherwise.
FOR GRACO CANADA CUSTOMERS
The parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings
entered into, given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties
reconnaissent avoir convenu que la rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures
judiciaires exécutés, donnés ou intentés à la suite de ou en rapport, directement ou indirectement, avec les procedures concernées.
Graco Information
TO PLACE AN ORDER, contact your Graco distributor, or call one of the following numbers
to identify the distributor closest to you:
1–800–328–0211 Toll Free
612–623–6921
612–378–3505 Fax
All written and visual data contained in this document reflects the latest product information available at the time of publication.
Graco reserves the right to make changes at any time without notice.
Original instructions. This manual contains English. MM 308647
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
GRACO INC. AND SUBSIDIARIES S P.O. BOX 1441 S MINNEAPOLIS MN 55440–1441 S USA
Copyright 1997, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.
Revised April 2012
24
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