Graco Marine Instruments 238890 User Manual

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.  
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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  
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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.  
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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.  
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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.  
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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.  
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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.  
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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.  
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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  
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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.  
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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.  
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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.  
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Notes  
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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)  
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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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