Graco 104266 User manual

308167N
EN
Instructions
Low Volume Air
Regulators
For ensuring consistent air pressure in systems requiring up to a maximum of 90 scfm.
For professional use only.
300 psi (2.1 MPa, 20.7 bar) Maximum Incoming Air Pressure 
• Diaphragm-and Piston-Operated
• Self-Relieving
• Temperature Range: 40 - 120° F (4° C - 49° C)
See page 2 for a list of regulators. Bare regulators are available
separately or in the regulator assemblies shown with them.
See manual 308168 for high volume regulators.
Important Safety Instructions
Read all warnings and instructions in this
manual before using the equipment. Save
these instructions. 
104266, 104267,
171937, 110234,
104815, 110318
16G409 110341,111804,
116903, 116904

Regulators
2308167N
Regulators
Bare
Regulator Part
No.
Regulator
Assembly Part
No.
Max. SCFM
(m3/min.)
Inlet/ Outlet
Port (npt)
Gage Ports
(2) (npt)
Handle
Type
Regulated Pressure
Range Diaphragm Material
104815 15
(0.4) 1/8 1/8 Knob
0-60 psi
(0-4.1 bar,
0 -.41 MPa)
Nitrile Rubber
110318 110147 15
(0.4 1/4 1/8 Knob
0-180 psi
(0-12.4 bar,
0-1.24 MPa)
Nitrile Rubber
110341 39
(1.1) 1/8 1/8 Knob
0-125 psi
(0-8.6 bar,
0-0.86 MPa)
None-
piston type
111804 39
(1.1) 1/4 1/8 Knob
0-125 psi
(0-8.6 bar,
0-0.86 MPa)
None-
piston type
110234
109075
224512
224024
90
(2.5) 3/8 1/4 Knob
0-250 psi
(0-17.2 bar,
0-1.72 MPa)
Nitrile Rubber
104266
206849
203716
202156
202858
244844
248829
90
(2.5) 1/2 1/4 Knob
0-250 psi
(0-17.2 bar,
0-1.72 MPa)
Nitrile Rubber
104267 206237 90
(2.5) 1/2 1/4 Knob
0-125 psi
(0-8.6 bar,
0-0.86 MPa)
Nitrile Rubber
116903 39
(1.1) 1/8 1/8 Knob
0-60 psi
(0-4.1 bar,
0 -.41 MPa)
None-
piston type
116904 39
(1.1) 1/8 1/8 Knob
0-25 psi
(0-1.72 bar,
0-0.17 MPa)
None-
piston type
16G409 121
(4) 1/4 1/8 Knob
0-58 psi
(0-4 bar,
0-0.4 MPa)
Nitrile Rubber

Dimensions
308167N 3
Dimensions
Model 104815 (1/8 in. Port)
Model 110318 (1/4 in. Port)
Model 110341 (1/8 in. Port)
Model 111804 (1/4 in. Port)
Model 116903, 116904 (1/8 in. Port)
Model 110234 (3/8 in. Port)
Model 104266, 104267 (1/2 in. Port)
Model 16G409 (1/4 in. Port)

Installation
4308167N
Installation
Before installing any air line components, blow out the
pipe line to remove scale and other debris. Use pipe
compound or tape sparingly and only on male threads.
Install the regulator in the pipe line so that the flow is in the
direction of the arrow stamped on the body. Locate the
regulator as close as possible to the equipment it serves.
Mounting brackets and nuts are available, see page 12.
To provide a variety of assembly options, a bleed-type
master air valve is not included with all regulator
assemblies. See Accessories, page 11 to order this
valve. Another bleed-type master air valve may also be
installed upstream from the air controls to isolate them for
servicing.
The air to the regulator should be clean. Erratic regulator
operation or loss of regulation is usually caused by dirt in
the disc area. To clean the regulator, see Repair, page 6.
WARNING
To reduce the risk of serious bodily injury, including
fluid injection, splashing fluid into the eyes or onto the
skin, or injury from the pump starting unexpectedly,
be sure the system includes a bleed-type master air
valve.
Install the air valve between the air regulator outlet
and the device that the regulator is serving. When
relieving system air pressure, close the bleed-type
master air valve to fully relieve air pressure.

Operation
308167N 5
Operation
Adjust Pressure
1. If the knob does not have a screw, pull the knob up
to adjust. When adjustment is complete, push the
knob down to lock in place.
2. If the knob has a cross-head screw, loosen the
screw 1/4 turn and then adjust the knob. Tighten the
screw to lock in the adjustment.
3. To increase the regulated air pressure, turn the knob
clockwise.
4. To decrease the regulated air pressure, turn the
knob counterclockwise.
FIG. 1

Repair
6308167N
Repair
If the regulator fails to operate, operates roughly,
vibrates, etc., follow the above Warning. Remove the
regulator and service as follows:
Disassemble the regulator. See the Repair Kit
Drawings on page 7.
Wash the parts with household soap and water or
denatured alcohol. Wipe the parts dry with a clean, soft,
dry rag. Use compressed air to blow any dirt and
contaminants out of the regulator body.
Inspect parts for damage or wear. Replace any
damaged parts.
Lubricate the bearing area, adjusting screw threads. and
spring ends with No. 2 lithium-base grease. Reassemble
the regulator.
When installing the diaphragm, be sure that the disc is
firmly in place. Install the disc stem into the center hole of
the diaphragm. Torque the spring housing to 45 in-lb
(51N•m).
WARNING
Relieve air and fluid pressure before servicing the
regulator.
To help prevent serious injury from pressurized fluid,
such as skin injection, splashing fluid, and moving
parts, relieve pressure on both the inlet and outlet
sides of the regulator before servicing.
Inlet: Turn off the air supply and depressurize the air
line connected to the inlet.
Outlet: Open the bleed-type master air valve
(required on the outlet side) to relieve system air
pressure, and trigger the gun or dispense valve and
open any fluid drain valves to relieve fluid pressure.
NOTICE
Do not use trichloroethylene, acetone or similar
solvents to clean the regulator. These solvents could
damage the regulator parts.
Bare
Regulator
Part No.
Repair Kits
104816
1/8 in. Knob
104817
1/8 in.
Diaphragm
223164
1/8 in. and 1/4
in. Piston
130984
Kit, Service,
Relieving
PS708P
Diaphragm
Assembly
104266 X X
104267 X X
110234 X X
104815 X X
110341 X
111804 X
110318 X X
116903 X
116904 X

Repair Kit Drawings
308167N 7
Repair Kit Drawings
For Regulators 
104815, 110318
For Regulators 
104267, 104266, 110234,
130984
For Regulators 
110341, 111804, 116903,
116904

Parts
8308167N
Parts
Model 109075
Model 224512
Model 224024
Model 110147
Ref. Part Description Qty.
1 110234 3/8 in. AIR REGULATOR 1
2 100721 PLUG, pipe, 1/4 npt 1
3 100960 GAUGE, 0-200 psi (0-14 bar) 1
Ref. Part Description Qty.
1 110234 3/8 in. AIR REGULATOR 1
2 100960 GAUGE, 0-200 psi (0-14 bar) 1
3 110224 BALL VALVE, 3/8–18 npt(t) 1
4 156849 NIPPLE, 3/8–18 npt 1
3
1
2
3/8 npt
OUTLET
3/8 npt
INLET
3
1
2
1/2 npsm
OUTLET
3/8 npt
INLET
4
Ref. Part Description Qty.
1 110234 3/8 in. AIR REGULATOR 1
2 100960 GAUGE, 0-200 psi (0-14 bar) 1
3 156849 NIPPLE, 3/8–18 npt 1
4 169971 FITTING, air line, 3/8 npt(m) 1
5 208536 COUPLER, air line 1
6 100721 PLUG, pipe, 1/4 npt 1
Ref. Part Description Qty.
1 110318 1/4 in. AIR REGULATOR 1
2 100403 PLUG, pipe, 1/8 npt 1
3 110319 GAUGE, 0-200 psi (0-14 bar) 1
3
1
21/4 npt
INTLET
3/8 npt
OUTLET
4
5
3
1
2
1/4 npt
OUTLET
1/4 npt
INLET

Parts
308167N 9
Model 203716
Model 244844
Model 202156
Model 202858
Ref. Part Description Qty.
1 104266 1/2 in. AIR REGULATOR 1
2 100721 PLUG, pipe, 1/4 npt 1
3 101180 GAUGE, 0-200 psi (0-14 bar) 1
4 159239 NIPPLE, pipe, 1/2 x 3/8 npt 1
5 207438 UNION, 90° swivel, 1/2 npt(m) x
1/2 npsm(f) swivel
1
Ref. Part Description Qty.
1 104266 1/2 in. AIR REGULATOR 1
2 100721 PLUG, pipe, 1/4 npt 1
3 100960 GAUGE, 0-200 psi (0-14 bar) 1
3
1
2
1/2 npsm
INLET
3/8 npt
OUTLET
4
5
3
1
2
1/2 npt
OUTLET
1/2 npt
INLET
Ref. Part Description Qty.
1 104266 1/2 in. AIR REGULATOR 1
2 100721 PLUG, pipe, 1/4 npt 1
3 100960 GAUGE, 0-200 psi (0-14 bar) 1
4 100081 BUSHING, 1/2(m) x 3/8(f) npt 1
Ref. Part Description Qty.
1 104266 1/2 in. AIR REGULATOR 1
2 100721 PLUG, pipe, 1/4 npt 1
3 100960 GAUGE, 0-200 psi (0-14 bar) 1
4 159239 NIPPLE, pipe, 1/2 x 3/8 npt 1
5 156684 UNION, swivel, 1/2 npt(m) x 1/2
npsm(f) swivel
1
3
1
2
3/8 npt
INLET
3/8 npt
OUTLET
4
4
3
1
2
1/2 npsm
INLET
3/8 npt
OUTLET
4
5

Parts
10 308167N
Model 248829
Ref. Part Description Qty.
1 104266 1/2 in. AIR REGULATOR 1
2 113333 VALVE, ball vented, 3/8 npt 1
3 101689 GAUGE, 0-200 psi (0-14 bar) 1
4 156849 NIPPLE, pipe, 3/8 npt 1
5 155494 UNION, swivel, 3/8 npt(m) x 3/8
npsm(f)
1
6 169970 FITTING, line air, 1/4 npt 1
7 100081 BUSHING, pipe, 1/2 x 3/8 npt 1
8 100206 BUSHING, pipe, 1/2 x 1/4 npt 1
3
1
2
connect to
coupler from
Kit 248827
to feed
pump
4
5
7
8
6