Instructions/Parts List
Low Pressure
309474K
Fluid Regulators
EN
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
Model 233757 Shown
II 2 G
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List of Models
List of Models
Fluid Pressure Regulators
Part No.
Series Model
Type
Maximum Fluid Inlet Pressure Regulated Pressure Range
233757
234263
B
B
P20-VM
P20-VM npt
Mechanical,
fluid pressure
580 psi (4000 kPa, 40 bar)
1015 psi (7000 kPa, 70 bar)
580 psi (4000 kPa, 40 bar)
580 psi (4000 kPa, 40 bar)
580 psi (4000 kPa, 40 bar)
15-290 psi
(100-2000 kPa, 1-20 bar)
233759
234267
B
B
P50-VM
P50-VM npt
Mechanical,
fluid pressure
145-725 psi
(1000-5000 kPa, 10-50 bar)
233773
234272
B
B
P10-VP
P10-VP npt
Pneumatic,
fluid pressure
6-145 psi
(40-1000 kPa, 0.4-10 bar)
233774
234273
B
B
P10-VM
P10-VM npt
Mechanical,
fluid pressure
15-145 psi
(100-1000 kPa, 1-10 bar)
233809
234256
B
B
P10-VP, OEM
P10-VP, OEM npt fluid pressure
Pneumatic,
6-145 psi
40-1000 kPa, 0.4-10 bar)
Back Pressure Regulators
Maximum Permanent Supply
Pressure
Part No.
Series Model
Type
Regulated Pressure Range
233758
234262
B
B
P10-RM
P10-RM npt
Mechanical,
back pressure
145 psi (1000 kPa, 10 bar)
145 psi (1000 kPa, 10 bar)
290 psi (2000 kPa, 20 bar)
725 psi (5000 kPa, 50 bar)
290 psi (2000 kPa, 20 bar)
15-145 psi
(100-1000 kPa, 1-10 bar)
233810
234257
B
B
P10-RP
P10-RP npt
Pneumatic,
back pressure
15-145 psi
(100-1000 kPa, 1-10 bar)
233811
234255
B
B
P20-RM DN13
P20-RM DN13 npt back pressure
Mechanical,
29-290 psi
(200-2000 kPa, 2-20 bar)
233812
234258
B
B
P50-RM
P50-RM npt
Mechanical,
back pressure
73-725 psi
(500-5000 kPa, 5-50 bar)
233950
234261
B
B
P20-RM DN1
P20-RM DN1 npt back pressure
Mechanical,
15-290 psi
(100-2000 kPa, 1-20 bar)
Key to Model Designation
Pressure regulation valve e.g. P20- R
M
DN13 npt
npt version
Valve Seat Orifice 13mm
Operating Mode
P - pneumatic
M - mechanical
Action
V - pressure regulation
R - back-pressure regulation
Regulation max
20 bar
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Warning
WARNING
EQUIPMENT MISUSE HAZARD
Equipment misuse can cause the equipment to rupture or malfunction and result in serious injury.
•
•
•
•
•
•
This equipment is for professional use only.
Read all instruction manuals, tags, and labels before operating the equipment.
Use the equipment only for its intended purpose. If you are not sure, call your Graco distributor.
Do not alter or modify this equipment. Use only genuine Graco parts and accessories.
Check equipment daily. Repair or replace worn or damaged parts immediately.
Do not exceed the maximum working pressure of the lowest rated system component. Refer to the
•
•
Use fluids and solvents which are compatible with the equipment wetted parts. Refer to the Techni-
cal Data section of all equipment manuals. Read the fluid and solvent manufacturer's warnings.
Route hoses away from traffic areas, sharp edges, moving parts, and hot surfaces. Do not expose
Graco hoses to temperatures above 180°F (82°C) or below -40°F (-40°C).
•
•
Wear hearing protection when operating this equipment.
Never use 1,1, 1-trichloroethane, methylene chloride, other halogenated hydrocarbon solvents or
fluids containing such solvents in pressurized aluminum equipment. Such use could result in a
chemical reaction, with the possibility of explosion.
•
Comply with all applicable local, state, and national fire, electrical, and safety regulations.
4
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Warning
WARNING
PRESSURIZED EQUIPMENT HAZARD
Spray from the gun, hose leaks, or ruptured components can splash fluid in the eyes or on the skin and
cause serious injury.
•
•
•
Do not point the gun at anyone or at any parts of the body.
Do not stop or deflect leaks with your hand, body, glove, or rag.
stop spraying; clean, check, or repair the equipment; and install or clean the spray nozzle.
•
•
Tighten all fluid connections before operating the equipment.
Check the hoses, tubes, and couplings daily. Replace worn, damaged, or loose parts immediately.
Permanently coupled hoses cannot be repaired; replace the entire hose.
TOXIC FLUID HAZARD
Hazardous fluid or toxic fumes can cause serious injury or death if splashed in the eyes or on the skin,
inhaled, or swallowed.
•
•
Know the specific hazards of the fluid you are using. Read the fluid manufacturer’s warnings.
Store hazardous fluid in an approved container. Dispose of hazardous fluid according to all local,
state and national guidelines.
•
Always wear protective eyewear, gloves, clothing and respirator as recommended by the fluid and
solvent manufacturer.
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Introduction
Introduction
A fluid pressure regulator is used in air spray systems to
ensure accurate, positive control of fluid pressure to an
air spray gun or to a low pressure dispensing valve or
atomizing head.
Fluid Pressure Regulators
Models 233757, 233759, 233774, 234263, 234267, and
234273 (FIG. 2.) are mechanically operated fluid pres-
sure regulators designed primarily for use with low to
medium viscosity fluids.
A regulator installed at a circulating line take-off or pump
reduces main line pressure to maintain the desired fluid
pressure to the air spray gun or to a low pressure dis-
pensing valve or atomizing head.
Models 233773, 233809, 234256, and 234272 (FIG. 3.)
are pneumatically operated fluid pressure regulators
designed primarily for use with highly viscous coatings.
Back Pressure Regulators
Models 233810, 233811, 233812, 233950, 234255,
234257, 234258, 233758, 234261, and 234262, are
back pressure regulators that limit the supply pressure
to a set value by opening an outlet and guiding back
excess material when the predetermined pressure has
been achieved. These valves are used in circulating
systems. Model 233810 pneumatic back pressure regu-
lator is shown in FIG. 1.
Air inlet
Piston
Fluid Inlet
(from gun)
Fluid Outlet
Diaphragm
(return line)
Valve plunger
TI1773A
Fig. 1. Cutaway of Pneumatic Back Pressure Regulator
6
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Introduction
Adjustment screw
Spring
Diaphragm
Fluid Outlet
(to gun)
Fluid Inlet
(from pump)
Valve plunger
Valve ball and seat
T I 1 7 7 2 A
TI1772B
Fig. 2. Cutaway of Mechanical Fluid Pressure Regulator
Air inlet
Fluid Inlet
(from pump)
Fluid Outlet
(to gun)
Diaphragm
Valve plunger
Valve ball and seat
TI1771B
T I 1 7 7 1 A
Fig. 3. Cutaway of Pneumatic Fluid Pressure Regulator
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Installation
Installation
1. Install one regulator for each spray gun.
b. Install a back pressure regulator downstream of
the gun. Connect the fluid return line from the
gun to the inlet of the back pressure regulator.
Connect the fluid return line to the pump to the
regulator’s outlet.
2. Apply thread sealant to connections as necessary.
3. Make sure that the direction of fluid flow agrees with
the flow direction markings on the regulator body.
a. Install a fluid pressure regulator upstream of the
gun: Connect the fluid line from the pump to the
inlet of the fluid regulator. Connect the fluid line
to the gun to the regulator’s outlet.
4. Flush and test the entire system.
FIG. 4., FIG. 5., and FIG. 6. show possible configurations
for installing a system. They do not depict actual system
designs. Consult your Graco distributor for assistance in
designing a system that meets your specific require-
ments.
B
A
F
Air to pump
C
B
Air to gun
Fluid
Y
E
D
TI1767A
Fig. 4. Low pressure, non-circulating system, mechanical fluid regulator
Key
E
F
Y
Fluid regulator
A
B
C
D
Air line filter
Air spray gun
Bleed-type air shut-off valve
Air regulator for pump and gun
Pump
Pump ground wire
8
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Installation
A
B
G
A
B
F
Air to Fluid
Regulator
Air to
Pump
C
B
Air to
Gun
Y
E
D
TI1766A
Fig. 5. Low pressure, non-circulating system, pneumatic fluid regulator
Key
E
F
Fluid regulator
A
B
C
D
Air line filter
Air spray gun
Bleed-type air shut-off valve
Air regulator for pump and gun
Pump
G
Y
Air regulator for fluid regulator
Pump ground wire
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Installation
A
A
A
Air
B
F
B
B
Fluid
C
G
K
Air to
gun
Air to Fluid
Regulator
Air to Back
Pressure
Fluid
Regulator
E
H
J
Fluid
to gun
Fluid return from gun
TI1768A
Fig. 6. Low Pressure circulating system, pneumatic fluid regulator and back pressure regulator
Key
G
H
J
Air regulator for fluid regulator
Fluid shutoff valve
A
B
C
E
F
Air line filter
Bleed-type air shut-off valve
Air regulator for pump and gun
Fluid regulator
Back pressure regulator
K
Y
Air regulator for back pressure regulator
Pump ground wire
Air spray gun
10
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Operation
Operation
Mechanical Regulator
Flush Before First Use
1. Back out the adjustment screw until there is no
spring pressure.
Your pressure regulator has been tested in the factory
with an anti-corrosion liquid. Before using the regulator,
thoroughly flush the system with a solvent to remove
residue of this liquid as well as any contaminants that
have been introduced during assembly of the system.
2. Turn on the fluid supply, to admit fluid to the regula-
tor.
3. Turn the screw clockwise to adjust fluid pressure to
the desired level.
Pressure Relief Procedure
Pneumatic Regulator
1. With the fluid supply shut off, turn on the air pres-
sure to the regulator.
WARNING
2. Turn on the fluid supply, to admit fluid to the regula-
tor.
Read the warnings on page 5, and follow the Pressure
Relief Procedure below whenever you:
3. Increase the fluid inlet pressure. When the fluid out-
let pressure is at the desired level, shut off the air to
the fluid regulator.
•
•
•
•
are instructed to relieve pressure
stop spraying
check or service any of the equipment
install or clean the fluid nozzle.
1. Shut off the air to the pump.
2. Trigger the air spray gun to relieve the fluid pres-
sure.
3. Open the fluid drain valve to relieve all fluid pres-
sure, having a container ready to catch the drain-
age.
Adjusting the Regulator
The fluid pressure regulator controls pressure down-
stream from its outlet. The inlet fluid pressure should
always be higher than the outlet fluid pressure.
If you are using an accessory fluid pressure gauge, trig-
ger the air spray gun to relieve pressure in the line when
reducing the pressure, to ensure a correct gauge read-
ing.
Adjust the pump air pressure and the fluid pressure reg-
ulator for the best spraying combination.
In a circulating system, the back pressure valve controls
the fluid pressure upstream of its inlet in the same way.
309474K
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Troubleshooting
Troubleshooting
Relieve the pressure (page 11) before checking or repairing the equipment.
To repair the regulator, refer to page 13.
Problem
Cause
Solution
Replace diaphragm.
Drop in fluid outlet pressure.
Ruptured diaphragm (15).
Air escaping (pneumatic regulators
only).
Check air hose and connections.
Replace piston seal (21).
Fluid outlet pressure increases to
level of fluid inlet pressure.
Valve ball (5) and seat (2) are worn
or stuck open.
Clean ball and seat. Replace worn or
damaged parts.
Fluid leaking from upper housing.
Ruptured diaphragm (15).
Replace diaphragm.
12
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Maintenance
Maintenance
1. Relieve all air and fluid pressure in the system.
Flushing
2. Remove the regulator from the system.
Flush before changing colors, at the end of the day,
before storing, and before repairing the equipment.
3. Disassemble the regulator (see the parts drawings
Flush with a fluid that is compatible with the fluid you are
pumping and with the wetted parts of your system.
Check with your fluid manufacturer or supplier for rec-
ommended flushing fluids and flushing frequency.
Relieve the pressure after flushing.
4. Clean and inspect all parts.
CAUTION
Do not allow paint or solvent to sit in the system for
extended periods. Fluid could dry in the regulator and
cause leakage. If leakage occurs, relieve pressure, then
disassemble and clean the regulator.
Be very careful when handling the carbide balls and
seats. Damage will cause poor operation and leak-
age.
5. Inspect the diaphragm, packings, o-rings, and seals
for wear. Check the ball and seat for nicks, wear, or
other damage.
Cleaning and Repair
When changing fluids or colors, the regulator should be
disassembled and cleaned. Regular cleaning and
inspection of the internal parts is necessary to keep the
fluid regulator working properly.
6. Lubricate packings, o-rings and seals when reas-
sembling the regulator.
309474K
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Parts
Parts
Mechanical Fluid Pressure Regulators
Part Nos. 233759 and 234267
25
1
6
17
15
28
26
27
3
14
2
10
5
24
3
4
22
1
21
13
12
10
5
20
5
6
7
4
8
19
18
11
2
1
2
3
5
6
Torque to 6 N•m (53 in-lb).
Torque to 2 N•m (18 in-lb).
Fill internal cavity with grease.
Used only on non-npt model 233759.
Torque to 5 N•m (44in-lb).
TI1753A
23
16
9
Ref.
Ref.
No. Part No. Description
No. Part No. Description
Qty
Qty
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
245372
15A179
15A173
117122
15A175
117096
117092
15A176
117105
15A186
245366
117129
117017
15A141
15A242
PLUNGER, valve
DIAPHRAGM
CAP, spring
1
1
1
1
1
1
1
1
1
1
1
8
8
1
1
1
HOUSING, lower, for 233759
HOUSING, lower, for 234267
SEAT, valve
O-RING
O-RING
BALL, 6 mm, carbide
SUPPORT, ball
SPRING, compression
COVER
SCREW, fhms, M4x10
RING, for non-npt model 233759
only
1
1
1
1
2
1
1
1
1
2
2
2
3
4
5
6
7
8
9
245368
15Y036
15Y035
117106
15A205
117090
15A144
117123
15A219
NUT, seal-lock
PLATE, spring, bottom
SPRING, compression
SPRING, compression
PLATE, spring, top
BALL, 6 mm
PACKING, PTFE with carbon
HOUSING, upper
SCREW, shcs, M5x80
WASHER
10
11
12
13
117101
117085
117099
PLUG, threaded
SEAL, ring
PLUG, threaded
2
1
1
BONNET, cover
SCREW, custom
14
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Parts
Mechanical Back Pressure Regulators
Part Nos. 233812 and 234258
25
1
17
15
6
28
26
27
3
14
2
10
5
24
3
4
22
1
21
13
12
10
5
20
4
8
19
18
11
2
1
2
3
5
6
Torque to 6 N•m (53 in-lb).
Torque to 2 N•m (18 in-lb).
Fill internal cavity with grease.
9
23
16
Used only on non-npt model 233812.
Torque to 5 N•m (44in-lb).
TI11248a
Ref.
No. Part No. Description
Ref.
No. Part No. Description
Qty
Qty
15
16
17
18
19
20
21
22
23
24
25
26
27
28
15A179
15A173
117122
15A175
117096
117092
15A176
117108
15A186
245366
117129
117017
15A141
15A242
DIAPHRAGM
CAP, spring
NUT, seal-lock
1
1
1
1
1
1
1
1
1
1
8
8
1
1
1
HOUSING, lower, for 233812
HOUSING, lower, for 234258
SEAT, valve
O-RING
O-RING
1
1
1
1
2
1
2
2
2
3
4
8
9
10
245369
15Y036
15Y035
15A143
117123
15A219
PLATE, spring, bottom
SPRING, compression
SPRING, compression
PLATE, spring, top
BALL, 8 mm
PACKING, PTFE with carbon
HOUSING, upper
SCREW, shcs, M5x80
WASHER
COVER
SCREW, fhms, M4x10
RING, for non-npt model 233812
only
11
12
13
14
117101
117085
117099
245373
PLUG, threaded
SEAL, ring
PLUG, threaded
PLUNGER, valve
2
1
1
1
BONNET, cover
SCREW, custom
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Parts
Mechanical Fluid Pressure Regulators
Part Nos. 233757, 233774, 234263, and 234273
28
15
25
24
1
14
2
10
5
3
4
22
21
1
13
12
11
19
10
5
17
16
3
5
6
7
1
2
3
4
5
Torque to 4-5 N•m (35-44 in-lb).
Torque to 2 N•m (18 in-lb).
2
4
4
8
9
Torque to 5 N•m (44 in-lb).
TI1751A
23
Grease OD.
Used only on non-npt models 233757 and 233774.
Ref.
Ref.
No. Part No. Description
No. Part No. Description
Qty
Qty
13
14
15
16
17
19
117099
245372
15A179
15A172
117122
117087
PLUG, threaded
PLUNGER, valve
DIAPHRAGM
CAP, spring
NUT, seal-lock
SPRING, compression, for 233774
and 234273
SPRING, compression, for 233757
and 234263
PLATE, spring, top
BALL, 6 mm
PACKING, PTFE with carbon
HOUSING, upper
SCREW, shcs, M5x16
SCREW, custom
1
1
1
1
1
1
1
HOUSING, lower, for 233757 and
233774
1
HOUSING, lower, for 234263 and
234273
1
2
3
4
5
6
7
8
9
245368
15Y036
15Y035
117106
15A205
117090
15A144
117123
15A219
SEAT, valve
O-RING
O-RING
BALL, 6 mm, carbide
SUPPORT, ball
1
1
2
1
1
1
1
2
2
117095
1
21
22
23
24
25
28
15A177
117105
15A185
245365
117126
15A241
1
1
1
1
8
1
SPRING, compression
COVER
SCREW, fhms, M4x10
RING, for non-npt models 233757
and 233774 only
PLUG, threaded
SEAL, ring
10
11
12
117101
117085
2
1
16
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Parts
Mechanical Back Pressure Regulators
Part Nos. 233758, 233811, 233950, 234255, 234261, and 234262
28
15
14
25
1
24
2
3
10
5
6
4
22
21
1
1
2
3
4
5
13
12
Torque to 4-5 N•m (35-44 in-lb).
Torque to 2 N•m (18 in-lb).
Torque to 5 N•m (44 in-lb).
Grease OD.
10
5
19
17
16
3
11
8
6
2
4
Used only on non-npt models
233758, 233950, and 233811.
4
7
6
7
Not used on models 233811 and
234255.
9
6
23
Models 233811 and 234255 use a
plug and retaining ring (not shown).
TI11249a
Ref.
No. Part No. Description
Ref.
No. Part No. Description
Qty
Qty
11
117101
PLUG, threaded, not used on mod-
els 233811 and 234255
SEAL, ring
2
1
HOUSING, lower, for 233758 and
233950
1
12
13
14
117085
117099
245373
1
1
1
HOUSING, lower for 234262 and
234261
1
PLUG, threaded
PLUNGER, valve, for 233758,
233950, 234261, and 234262
PLUNGER, valve, for 233811 and
234255
15A198
15C303
245369
HOUSING, lower, for 233811
HOUSING, lower, for 234255
SEAT, valve, for 233758, 233950,
234261, and 234262
1
1
1
245378
1
2
15
16
17
19
15A179
15A172
117122
117087
DIAPHRAGM
CAP, spring
NUT, seal-lock
SPRING, compression, for 233758
and 234262
1
1
1
1
15A228
15Y036
15Y035
SEAT, valve, for 233811 and
234255
O-RING, not used on models
233811 and 234255
O-RING, for 233758, 233950,
234261, and 234262
1
1
2
3
4
117095
SPRING, compression, for 233811,
233950, 234261, and 234255
PLATE, spring, top
BALL, 6 mm
PACKING, PTFE with carbon
HOUSING, upper
SCREW, shcs, M5x16
SCREW, custom
RING, retaining, 233811 and
234255 only
1
15Y031
15A143
O-RING, for 233811 and 234255
COVER, for 233758, 233950,
234261, and 234262
2
1
21
22
23
24
25
28
29
15A177
117105
15A185
245365
117126
15A241
117124
1
1
1
1
8
1
1
8
15A222
117123
PLUG, for 233811 and 234255
SCREW, fhms, M4x10, not used on
models 233811 and 234255
RING, for non-npt models 233758,
and 233950
1
2
9
10
15A219
15A221
2
2
RING, for non-npt model 233811
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Parts
Pneumatic Fluid Pressure Regulators
Part Nos. 233773, 233809, 234272, and 234256
1
2
3
4
5
26
Torque to 4-5 N•m (35-44 in-lb).
Torque to 2 N•m (18 in-lb).
Torque to 5 N•m (44 in-lb).
Grease OD.
6
25
1
27
6
14
2
24
Used only on non-npt models
233773 and 233809.
6
Used only on npt models
234272 and 234256.
17
3
3
4
10
5
21
1
16
4
12
13
10
5
23
5
11
6
7
2
15
4
8
9
TI1755A
Ref.
No.
Ref.
No.
Part No. Description
Qty.
Part No. Description
HOUSING, lower, for 233773 and
Qty.
9
10
117123
15A219
SCREW, fhms, M4x10
RING, for non-npt models 233773
2
2
1
1
233809
and 233809
HOUSING, lower, for 234272 and
234256
1
1
1
11
12
13
14
15
16
17
21
23
24
25
26
117101
117085
117099
245372
15A179
15A204
117122
117102
15A185
15A191
117127
15C332
PLUG, threaded
SEAL, ring
PLUG, threaded
PLUNGER, valve
DIAPHRAGM
PISTON
NUT, seal-lock
SEAL, flat
PACKING, PTFE with carbon
HOUSING, upper
SCREW, shcs, M5x35
FITTING, for npt models 234272
and 234256 only
WASHER, for npt models 234272
and 234256 only
2
1
1
1
1
1
1
1
1
1
8
1
2
245368
245371
SEAT, valve, for 233773 and
234272
SEAT, valve, for 233809 and
234256
3
4
5
15Y036
15Y035
117106
O-RING
O-RING
1
1
1
BALL, 6 mm, carbide, for 233773
and 234272
117110
BALL, 6 mm, for 233809 and
234256
1
6
7
8
15A205
117090
15A144
SUPPORT, ball
SPRING, compression
COVER
1
1
1
27
15C333
1
18
309474K
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Parts
Pneumatic Back Pressure Regulators
Part Nos. 233810 and 234257
26
6
25
1
27
6
14
2
24
17
3
3
4
10
5
21
1
16
4
12
13
10
5
23
1
2
3
4
5
6
Torque to 4-5 N•m (35-44 in-lb).
Torque to 2 N•m (18 in-lb).
Torque to 5 N•m (44 in-lb).
Grease OD.
4
8
11
2
15
9
Used only on non-npt model 233810.
Used only on npt model 234257.
TI11250a
Ref.
No.
Ref.
No.
Part No. Description
Qty.
Part No. Description
HOUSING, lower, for 233810
Qty.
15
16
17
21
23
24
25
26
15A179
15A204
117122
117102
15A185
15A191
117127
15C332
DIAPHRAGM
PISTON
NUT, seal-lock
SEAL, flat
PACKING, PTFE with carbon
HOUSING, upper
SCREW, shcs, M5x35
FITTING, for npt model 234257
only
1
1
1
1
1
1
8
1
1
1
1
1
1
1
1
2
2
2
1
1
1
HOUSING, lower, for 234257
SEAT, valve
2
3
4
8
245369
15Y036
15Y035
15A143
117123
15A219
117101
117085
117099
245373
O-RING
O-RING
COVER
9
SCREW, fhms, M4x10
RING, for non-npt model 233810
PLUG, threaded
SEAL, ring
10
11
12
13
14
27
15C333
WASHER, for npt model 234257
only
1
PLUG, threaded
PLUNGER, valve
309474K
19
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Technical Data
Technical Data
Category
Data
Maximum Fluid Inlet Pressure
(Fluid Pressure Regulators)
233757, 233773, 233774, 233809,
234256, 234263, 234272, 234273 : 580 psi (4000 kPa, 40 bar)
233759, 234267: 1015 psi (7000 kPa, 70 bar)
Maximum Permanent Supply Pres- 233758, 233810, 234257, 234262: 145 psi (1000 kPa, 10 bar)
sure (Back Pressure Regulators)
233811, 233950, 234255, 234261: 290 psi (2000 kPa, 20 bar)
233812, 234258: 725 psi (5000 kPa, 50 bar)
Pressure Range
233773, 233809, 234272, 234256: 6-145 psi (40-1000 kPa, 0.4-10 bar)
233758, 233774, 233810,
234257,234262, 234273 : 15-145 psi (100-1000 kPa, 1-10 bar)
233757, 234263: 15-290 psi (100-2000 kPa, 1-20 bar)
233811, 233950, 234255, 234261: 29-290 psi (200-2000 kPa, 2-20 bar)
233812, 234258: 73-725 psi (500-5000 kPa, 5-50 bar)
233759, 234267: 145-725 psi (1000-5000 kPa, 10-50 bar)
Maximum Operating Air Pressure 145 psi (1 MPa, 10 bar)
(Pneumatic Regulators Only)
Maximum Flow Rate
Temperature Range
233757, 233758, 233759, 233773, 233774, 233809, 233810, 233811, 233950,
234255, 234256, 234261, 234262, 234263, 234273: 32-194°F (0-90°C)
233812, 234258: 50-176°F (10-80°C)
Fluid inlet and outlet
233757, 233758, 233759, 233773, 233774,
233809, 233810, 233812, 233950: 3/8 in. BSPP(F)
234256, 234257, 234258, 234261,
234262, 234263, 234267, 234272, 234273: 3/8 in. npt(f)
233811: 1 in. BSPP(F)
234255: 1 in. npt(f)
Air inlet
233773, 233809, 233810: 1/4 in. BSPP(F)
234256, 234257, 234272: 1/4 in. npt(m)
1/8 in. BSPP(F)
*Gauge port
Wetted Parts
Stainless steel, tungsten carbide, PTFE, chemically resistant fluoroelastomer,
PEEK (233809 and 234256 only)
* Accessory gauges available.
20
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Accessory Gauges
Accessory Gauges
Part No. Gauge
Part No. Gauge
233758
234262
233950
234261
233811
234255
233812
234258
233810
234257
118338
118338
118338
118338
118338
118338
118339
118339
118338
118338
233774
243273
233757
234262
233759
234267
234773
234272
233809
234273
118338
118338
118338
118338
118339
118339
118338
118338
118338
118338
Flow Rate Data
Maximum fluid flow with 10 weight oil, regulator wide open and no downstream restrictions.
Part No.
Inlet Fluid Test Pressure
Inlet/Outlet Size
Seat Size
Fluid Flow
233757
234263
233758
234262
580 psi (4000 kPa, 40 bar)
3/8 BSPP(F)
3/8 npt(f)
3/8 BSPP(F)
3/8 npt(f)
5 mm
7.0 gpm (26.6 lpm)
4.6 gpm (17.5 lpm)
9.8 gpm (37.2 lpm)
7.0 gpm (26.6 lpm)
7.0 gpm (26.6 lpm)
7.0 gpm (26.6 lpm)
4.6 gpm (17.5 lpm)
7.8 gpm (29.6 lpm)
11.5 gpm (43.7 lpm)
5.7 gpm (21.7 lpm)
145 psi (1000 kPa, 10 bar)
1015 psi (7000 kPa, 70 bar)
580 psi (4000 kPa, 40 bar)
580 psi (4000 kPa, 40 bar)
580 psi (4000 kPa, 40 bar)
145 psi (1000 kPa, 10 bar)
290 psi (2000 kPa, 20 bar)
725 psi (5000 kPa, 50 bar)
290 psi (2000 kPa, 20 bar)
6.5 mm
5 mm
233759
234267
3/8 BSPP(F)
3/8 npt(f)
233773
234272
233774
234273
3/8 BSPP(F)
3/8 npt(f)
3/8 BSPP(F)
3/8 npt(f)
5 mm
5 mm
233809
234256
3/8 BSPP(F)
3/8 npt(f)
5 mm
233810
234257
233811
234255
3/8 BSPP(F)
3/8 npt(f)
1 in. BSPP(F)
1 in. npt(f)
6.5 mm
13 mm
6.5 mm
6.5 mm
233812
234258
3/8 BSPP(F)
1 in. npt(f)
233950
234261
3/8 BSPP(F)
1 in. npt(f)
309474K
21
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Mounting Dimensions
Mounting Dimensions
A
Part No.
Thread
Dimension A
233757
234263
M5
24 mm (0.95 in.)
233758
234262
M5
M5
M5
M5
M5
M5
M5
M5
M5
24 mm (0.95 in.)
24 mm (0.95 in.)
24 mm (0.95 in.)
24 mm (0.95 in.)
24 mm (0.95 in.)
24 mm (0.95 in.)
36 mm (1.42 in.)
24 mm (0.95 in.)
24 mm (0.95 in.)
233759
234267
233773
234272
233774
234273
233809
234256
233810
234257
233811
234255
233812
234258
233950
234261
22
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Mounting Dimensions
309474K
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Graco 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 procédures concernées.
Graco Information
For the latest information about Graco products, visit www.graco.com.
TO PLACE AN ORDER, contact your Graco distributor or call to identify the nearest distributor.
Phone: 612-623-6921 or Toll Free: 1-800-328-0211 Fax: 612-378-3505
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.
This manual contains English. MM 309474
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA
Copyright 2002, Graco Inc. is registered to ISO 9001
Revision K, September 2014
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