Graco 308325E Fluid Pressure Regulators Users Manual

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Instructions
Parts

ACETAL MATERIAL, WATERBASE COMPATIBLE

Fluid Pressure Regulators

308325E

For Use In Low-Pressure Systems Only
Fluid Flow up to 0.5 gpm (1.9 lpm)
Read warnings and instructions.

Spring-Operated Regulators
100 psi (0.7 MPa, 7 bar) Maximum Inlet Pressure
3 to 30 psi (.02 to 0.2 MPa, 0.2 to 2.1 bar)
Regulated Pressure Range
Model 236081, Series A
with no pressure gauge
Model 236449, Series A
with stainless steel pressure gauge
30 psi (0.2 MPa, 2.1 bar) gauge

02725

Model 241976, Series A
with stainless steel pressure gauge
60 psi (0.4 MPa, 4.1 bar) gauge
_____________________________________

100 psi (0.7 MPa, 7 bar) Maximum Inlet Pressure
20 to 100 psi (.14 to 0.7 MPa, 1.4 to 7 bar)
Regulated Pressure Range
Model 236216, Series A
with no pressure gauge
Model 236450, Series A
with stainless steel gauge
100 psi (0.7 MPa, 7 bar) gauge

Air-Operated Regulators
100 psi (0.7 MPa, 7 bar) Maximum Inlet Pressure
3 to 100 psi (.02 to 0.7 MPa, 0.2 to 7 bar)
Regulated Pressure Range
Model 238159, Series A
with no pressure gauge
Model 236281, Series A
with stainless steel gauge
100 psi (0.7 MPa, 7 bar) gauge

GRACO INC.ąP.O. BOX 1441ąMINNEAPOLIS, MNą55440-1441
Copyright 2001, Graco Inc. is registered to I.S. EN ISO 9001

CAUTION
The fluid supply system main line pressures
often exceed the pressure range of the gauge
supplied with regulator 236449. Exposing this
gauge to excessive pressure can damage the
gauge, causing inaccurate readings, and the
needle will not return to zero. Such damage is
not covered by the Graco warranty.

Table of Contents
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Repair Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Performance Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Graco Standard Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Graco Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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.
INSTRUCTIONS

D This equipment is for professional use only.
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 exceed the maximum working pressure of the lowest rated component in your system. Do
not exceed 100 psi (0.7 MPa, 7 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.

2

308325

WARNING
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
medical attention.
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 4 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.

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.
United States Government safety standards have been adopted under the Occupational Safety and Health Act.
You should consult these standards––particularly the General Standards, Part 1910 and the Construction
Standards, Part 1926.

308325

3

Installation
Introduction

Pressure Relief Procedure

Fluid pressure regulators are used for accurate,
positive control of the fluid pressure to spray guns,
dispensing valves or atomizing heads.
Regulators installed at circulating line take-offs or
pumps are used to reduce main line pressure and
maintain the desired fluid pressure to the spray gun or
atomizing head.

Before Installing the Fluid Regulator

WARNING
INJECTION HAZARD
The system pressure must be manually
relieved to prevent the system from
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

1. Determine where to locate the regulator.

D Are instructed to relieve the pressure

2. Install a ball valve for the regulator inlet and outlet.

D Stop spraying

3. Install temporary plumbing between the ball
valves.

D Check or service any of the system equipment
D Install or clean the spray tips

4. Thoroughly flush the system to remove metal
chips and other contaminants and to check for
leaks.

1. Shut off the pump.

Installing the Fluid Regulator

2. Close the fluid regulator’s inlet ball valve (B). Refer
to Fig.1, page 5.

1. See Figs. 1 and 2 on page 5. Install one
regulator for each spray gun. Mount the regulator
in a vertical position for the best flow and minimum
pigment settling. The gauge, if used, must be
mounted vertically. If the regulator is mounted
horizontally, an elbow must be used so the gauge
will be vertical.
2. Put sealer on threaded connections, except on
swivel unions as it interferes with the swivel action.
3. Flush and test the entire system. Be sure to follow
the flushing procedure on page 6.

CAUTION
Avoid overtightening threaded connections into the
regulator’s plastic inlet and outlet threads. Check to
be sure the threaded connections are tight and
leak-free, but do not overtighten!

4

308325

3. Relieve fluid pressure in the fluid regulator by
triggering the spray gun.
4. In spring-operated regulators, turn the adjustment
handle (1) counterclockwise until the spring force
is relieved.
If you suspect that the spray tip or hose is completely
clogged, or that pressure has not been fully relieved
after following the steps above, very slowly loosen the
tip guard retaining nut or hose end coupling and relieve
pressure gradually, then loosen completely, then clear
the tip or hose.

Installation
Spring-Operated Regulator Installation
Models 236081, 236216 (without gauge)
236449, 236450, 241976 (with gauge)
A
KEY
A Fluid supply
B Inlet ball valve
C Outlet ball valve

1

D Air filter and regulator
E Back pressure valve
F Fluid return

B

G Air supply
1 Regulator adjustment handle

C

G
D

E

F

02726

Fig. 1

Pilot Regulator Air Supply Line
Air-Operated Regulator Installation
Model 238159 (without gauge)
Model 236281 (with gauge)

B

E

KEY
A Fluid supply

A

B Inlet ball valve
C Outlet ball valve
D Air filter, regulator, and
moisture separator

C

E Air supply

D
02726

Fig. 2

308325

5

Operation
Air Operated Regulators

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.
D Always use the lowest possible air and fluid
pressures for your application. High pressures
can cause premature spray tip, regulator, and
pump wear.
NOTE: Reference numbers and letters in parentheses
in the text refer to Figs.1 through 5 and the Parts
Drawings.

1. Start the pump and open the fluid regulator’s inlet ball
valve (B) to admit fluid to the regulator. See Fig. 2.
2. Increase the air pressure to obtain the desired fluid
pressure. Before reducing the regulator pressure,
partially relieve pressure in the gun hose to ensure
the correct gauge reading.
NOTE: Make sure the air bleed hole (J) in the air line
fitting (2) is not plugged. Refer to Fig. 4. For the best
results, use an air regulator with at least a two inch
diameter diaphragm to control this fluid regulator.

Flushing Procedure
1. Flush the regulator with a compatible solvent
whenever the rest of the system is flushed.

Regulating Fluid Pressure
Spring Operated Regulators
1. Close the regulator: turn the adjustment handle (1)
counterclockwise to relieve the spring tension. See
Fig. 3.
2. Start the pump and open the fluid regulator’s inlet
ball valve (B) to admit fluid to the regulator. See
Fig. 1.
3. Turn the adjustment handle (1) clockwise to
increase fluid pressure. See Fig. 3. Adjust for the
desired spray pattern. Before reducing the
regulator pressure, partially relieve pressure in the
gun hose to ensure the correct gauge reading.
Tighten the jam nut (3) to the regulator cap (5) to
ensure the proper pressure setting.

2. Remove the gauge if the fluid pressure will exceed
the gauge range.
3. Spring Operated Regulators Only
a. Shut off the pump and relieve fluid pressure in
the system by opening the back pressure
valve (E) or other bypass valve. See Fig. 1.
b. Turn the adjustment handle (1) clockwise to
open the regulator valve to the desired flushing
outlet pressure and flow. See Fig. 3.
4. Air Operated Regulator Only
a. Increase the air pressure to obtain desired
fluid flushing pressure.
b. Make sure the air bleed hole (J) in the air line
fitting (2) is not plugged. Refer to Fig. 4.
5. Flush until thoroughly clean. Always use the lowest
possible pressure when flushing.
6. Spring Operated Regulators Only
After flushing, turn the adjustment handle (1)
counterclockwise to the previous pressure setting.
Partially relieve pressure in the gun hose to ensure
the correct gauge reading.

5
3
1
02729

Fig. 3

6

308325

Notes

308325

7

Service
Air Operated Regulator
Disassembly

Reassembly

1. Shut off the pump. Close the ball valve at the
regulator’s air inlet. Refer to Fig. 2, page 5.

1. Place the spring (17*) into the housing (20), then
the ball (16*) on top of the spring.

2. Release all the air and fluid pressure in the
regulator and disconnect the air and fluid lines.

CAUTION

3. Remove the regulator from the system. Remove
the eight hex head screws (18) and nuts (19) from
the regulator cap (5) and the housing (20). See
Fig. 4.

Use special care when tightening the seat (14*).
Tighten the seat by hand several turns before using
a wrench. Use care not to strip the plastic threads in
the housing (20).

4. Remove the o-ring (6*) from the regulator cap (5).
Remove the jam nut (9) and the washer (10) from
the diaphragm plate (13).

2. Tighten the seat (14*) and the o-ring (15*) into the
housing. Torque to 37–43 in–lbs (4.1–4.8 N.m).

5. Remove the diaphragm (11*) and gasket (12*).
6. Remove the valve seat (14*) and the o-ring (15*)
from the regulator body.

CAUTION
Use special care when handling the hard carbide ball
(16*) and seat (14*) to avoid damage to them.
7. Remove the ball (16*) and the spring (17*).
8. Thoroughly clean and inspect all parts. Replace
any parts that appear to be worn or damaged.

3. Assemble the following parts onto the diaphragm
plate (13). Place the gasket (12*) and diaphragm
(11*), with the blue PTFE side facing down, toward
the diaphragm plate (13). Place the washer (10),
with ridges facing the rubber side of the
diaphragm, onto the diaphragm plate (13). Secure
them with the jam nut (9). Torque the jam nut onto
the diaphragm plate to 28–32 ft–lb (38–43 N.m).
4. Install the assembled parts in the housing (20),
with the stem on the diaphragm plate (13) oriented
towards the seat (14*).
5. Apply thread sealant and tighten the air line fitting
(2) into the nut (4) in the cap (5). Torque to
140–160 in–lb (16–18 N.m).
6. Place the hex head screws (18) into the eight
holes in the cap (5) and install onto the housing
(20) with the nuts (19) located around the housing
holes. Torque the eight hex head screws in the
sequence shown on the Top View in Fig. 4.
NOTE: Numbers on the diagram indicate the
tightening sequence. Torque screws evenly to 60 in–lb
(6.8 N.m), three times, consecutively, to compensate
for diaphragm relaxation.

8

308325

Service
Model shown:
236281
4

2

J
9
4

2

5
10
3

18, 19
11*

6*
12*
13
15*

1

20
14*
16*
17*
02730

1

Torque to 37–43 in–lbs (4.1–4.8 N.m).

2

Torque to 28–32 ft–lbs (38–43 N.m).

3

4

Torque screws evenly to 60 in–lb (6.8 N.m), three times,
consecutively, to compensate for diaphragm relaxation.
Follow the torque sequence shown below.
Torque to 140–160 in–lbs (16–18 N.m).

3

5
7

1

Top View
2

8
6

4
02727

Fig. 4

308325

9

Service
Spring Operated Regulators
Disassembly

Reassembly

1. Shut off the pump. Close the ball valve at the
regulator’s fluid inlet. Refer to Fig. 1, page 5.

1. Place the spring (17*) into the housing (20), then
the ball (16*) on top of the spring.

2. Release all fluid pressure in the regulator and
disconnect the fluid line. Remove the regulator
from the system.
3. Turn the adjustment handle (1) counterclockwise
until the spring force is relieved (Fig. 3).
4. Remove the eight hex head screws (18) and nuts
(19) from the regulator cap (5) and the housing (20).
See Fig. 5.
5. Remove the spring (8), spring guide (7), and o-ring
(6*) from the regulator cap (5). Remove the jam
nut (9) and the washer (10) from the diaphragm
plate (13).
6. Remove the diaphragm (11*) and the gasket (12).
Remove the valve seat (14*) and o-ring (15*) from
the regulator body.

CAUTION
Use special care when handling the hard carbide ball
(16*) and seat (14*) to avoid damage to them.
7. Remove the ball (16*) and spring (17*).
8. Thoroughly clean and inspect all parts. Replace
any parts that appear to be worn or damaged.

CAUTION
Use special care when tightening the seat (14).
Tighten it by hand several turns before using a
wrench. Use care not to strip the plastic threads in
the housing (20).
2. Tighten the seat (14*) and the o-ring (15*) into the
housing. Torque to 37–43 in–lbs (4.1–4.8 N.m).
3. Assemble the following parts onto the diaphragm
plate (13). First, place the gasket (12*) and
diaphragm (11*), with the blue PTFE side facing
down, towards the diaphragm plate (13). Then,
place the washer (10), with ridges facing the
rubber side of the diaphragm, onto the diaphragm
plate (13). Secure them with the jam nut (9).
Torque the jam nut onto the diaphragm plate to
28–32 ft–lb (38–43 N.m).
4. Install the assembled parts in the housing (20),
with the stem on the diaphragm plate (13) oriented
towards the seat (14*).
5. Coat the outer surfaces of the spring (8) with no. 2
lithium base grease to reduce possible friction.
6. Place the spring (8) on top of the jam nut (9) and
the spring guide (7) on top of the other end of the
spring. Apply no.2 lithium base grease in the drill
point of the spring guide for lubrication.
7. Place the hex head screws (18) into the eight
holes in the cap (5) and install onto the housing
(20) with the nuts (19) located around the housing
holes. Torque the eight hex head screws in the
sequence shown on the Top View in Fig. 5.
8. Screw the adjustment handle (1) into the nut (4) in
the regulator cap (5).

10

308325

Service
Model 236081 shown
1
5
7
4

8
9

3

2

18, 19
10
11*

13

12*
15*
14*

1

*6
16*

20

17*
1

Torque to 37–43 in–lbs (4.1–4.8 N.m).

2

Torque to 28–32 ft–lb (38–43 N.m).

3

Torque screws evenly to 60 in–lb (6.8 N.m), three times, consecutively, to compensate for diaphragm relaxation. Follow the torque
sequence shown below.

3

02732

5
7

1

Top View

2

8
6

4
02766

Fig. 5

308325

11

Troubleshooting
NOTE: Check all possible remedies in the
Troubleshooting Chart before disassembling the fluid
regulator.

Problem
No pressure regulation.

Fluid leaks from between the cap
(5) and the housing (20).

Pressure creeps above setting.

Pressure drops below setting.

12

308325

WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 4.

Cause

Solution

Damaged or clogged air regulator
or line (236281 or 238159).

Clear obstruction in line, service
regulator if necessary.

No flow or pressure to the inlet of
the regulator.

Clear obstruction in the fluid line to
the regulator.

Damaged diaphragm (11*).

Replace diaphragm.

Loose cap (5).

Tighten screws (18,19) in sequence shown in Service section.

Worn gasket (12*).

Replace gasket.

Worn o-ring (6*).

Replace o-ring.

Damaged or clogged air regulator
or line (236281 or 238159).

Clear obstruction in line, service
regulator if necessary.

Damaged diaphragm (11*).

Replace diaphragm.

Contamination between ball (16*)
and seat (14*).

Replace ball (16*), seat (14*), and
o-ring (15*).

Damaged or clogged air regulator
or line (236281 or 238159).

Clear obstruction in line, service
regulator if necessary.

Empty/clogged supply line.

Fill/flush supply line.

Clogged air spray gun or fluid dispensing valve.

Replace, see gun or valve manual
for service instructions.

Using regulator beyond its rated
flow capacity, see Technical Data
on page 17.

Install additional regulators.

Parts
Spring-Operated Regulators
3 to 30 psi (.02 to 0.2 MPa, 0.2 to 2.1 bar) Regulated Pressure Range
Model 236081, Series A, includes items 1 to 20 (no gauge)
Model 236449, Series A, includes items 1 to 20, and 30 (30 psi gauge)
Model 241976, Series A, includes items 1 to 20, and 28 (60 psi gauge)

1

9

3

10

18

11*

5

12*

*6

13

4
14*
7
15*
8
16*
17*
20
19

30

02735

Ref.
No.

Part No.

Description

1
3
4
5
6*
7
8

236590
101448
106292
188943
112349
188949
112203

9

171858

10
11*

171862
112348

Adjustment Handle Assembly
NUT, jam; 3/8–24 unf–2b
NUT, hex; 3/8–24 unf–2b
CAP, regulator
O-RING, buna
GUIDE, spring
SPRING, compression,
adjusting, yellow
NUT, jam, special;
11/16–16 unc–2b
WASHER, diaphragm
DIAPHRAGM; PTFE with nylon
fabric/buna–n base
GASKET; cellulose fiber
Diaphragm Plate Assembly
11/16–16 unc–2a

12*
13

172132
236591

Qty.
1
1
1
1
1
1

Ref.
No.

Part No.

Description

14*
15*
16*
17*
18

188944
109450
102922
112204
112547

19

112248

20
28

188942
195583

30

187875

SEAT, valve; stainless steel
O-RING; PTFE
BALL, tungsten carbide
SPRING, compression, ball
SCREW, flanged hex head;
1/4–20 unc–2a x 1”
NUT, hex, retaining;
1/4–20 unc–2b
HOUSING, regulator
GAUGE, pressure,
60 psi (0.4 MPa, 4 bar);
stainless steel (model 241976)
GAUGE, pressure,
30 psi (0.2 MPa, 2 bar);
stainless steel (model 236449)

1
1
1
1
1

Qty.
1
1
1
1
8
8
1

1

1

1
*

These parts are included in Repair Kit 236589,
which may be purchased separately.
308325

13

Parts
Spring-Operated Regulators
20 to 100 psi (.14 to 0.7 MPa, 1.4 to 7 bar) Regulated Pressure Range
Model 236216, Series A, includes items 1 to 20 (no gauge)
Model 236450, Series A, includes items 1 to 30 (100 psi gauge)

1

9

3
10
18
11*
5
12*
*6
13
4
14*
7
15*
8

16*
17*
20
19
30
02735

Ref.
No.

Part No.

Description

1
3
4

236590
101448
106292

5
6*
7
8

188943
112349
188949
105291

Adjustment Handle Assembly
NUT, jam; 3/8–24 unf–2b
NUT, hex; adjustment;
3/8–24 unf–2b
CAP, regulator
O-RING, buna–n
GUIDE, spring
SPRING, compression, adjusting,
silver
NUT, jam, special;
11/16–16 unc–2b
WASHER, diaphragm
DIAPHRAGM; PTFE with nylon
fabric/buna–n base
GASKET; cellulose fiber

9

171858

10
11*

171862
112348

12*

172132

Ref.
No.

Part No.

Description

13

236591

1
1
1
1

14*
15*
16*
17*
18

188944
109450
102922
112204
112547

1

19

112248

1
1

20
30

188942
187874

Diaphragm Plate Assembly
11/16–16 unc–2a
SEAT, valve; stainless steel
O-RING; PTFE
BALL, tungsten carbide
SPRING, compression, ball
SCREW, flanged hex head;
1/4–20 unc–2a x 1”
NUT, hex, retaining;
1/4–20 unc–2b
HOUSING, regulator
GAUGE, pressure,
100 psi (0.7 MPa, 7 bar);
stainless steel

Qty.
1
1

1
1
*

14

308325

These parts are included in Repair Kit 236589,
which may be purchased separately.

Qty.
1
1
1
1
1
8
8
1

1

Parts
Air-Operated Regulators
3 to 100 psi (.02 to 0.7 MPa, 0.2 to 7 bar) Regulated Pressure Range
Model 238159, Series A, includes items 1 to 20 (no gauge)
Model 236281, Series A, includes items 1 to 20, and 30 (100 psi gauge)
9

10
2
11*
18
12*
13
14*
5
15*
16*
4
17*
*6
20

19
30

02733

Ref.
No.

Part No.

Description

2
4
5
6*
9*

189539
106292
188943
112349
171858

NIPPLE, hex
NUT, hex; 3/8–24 unf–2b
CAP, regulator
O-RING; buna–n
NUT, Jam, special;
11/16–16 unc–2b
WASHER, diaphragm
DIAPHRAGM; PTFE with nylon
fabric/buna–n base
GASKET; cellulose fiber
Diaphragm Plate Assembly
SEAT, valve; stainless steel

10
11*

171862
112348

12*
13
14*

172132
236591
188944

Ref.
No.

Part No.

Description

1
1
1
1

15*
16*
17*
18

109450
102922
112204
112547

1
1

19

112248

20
30

188942
187874

O-RING; PTFE
BALL; tungsten carbide
SPRING, compression, ball
SCREW flanged hex head;
1/4–20 unc–2a x 1”
NUT, hex, retaining;
1/4–20 unc–2b
HOUSING, regulator
GAUGE, pressure,
100 psi (0.7 MPa, 7 bar);
stainless steel

Qty.

1
1
1
1

*

Qty.
1
1
1
8
8
1

1

These parts are included in Repair Kit 236589,
which may be purchased separately.

308325

15

Repair Kits

Accessories
Use Only Genuine Graco Parts
and Accessories
Air Filter, Moisture Separator with
Regulators 217075

Kit No. 236589
For spring- and air-operated regulators

Part No.

Description

112348

DIAPHRAGM; PTFE with nylon
fabric/buna–n base
GASKET; cellulose fiber
SEAT, valve; stainless steel
O-RING; PTFE
SPRING, compression, ball
BALL, tungsten carbide
O-RING; buna–n

172132
188944
109450
112204
102922
112349

Qty.
1
1
1
1
1
1
1

200 psi (1.4 MPa, 14 bar) Maximum Inlet Pressure
For moisture separation and to separate air regulation
to spray gun and fluid regulator. 1/2 npt(f) inlet
With two 0 to 100 psi (0 to 0.7 MPa, 0 to 7 bar) 1/4
npt(m) regulated ports and two 0 to 200 psi
(0 to 1.4 MPa, 0 to 14 bar) 3/8 npt(f) unregulated ports

Air Regulator and Gauge 206199
0 to 125 psi (0 to 0.75 MPa, 0 to 8.5 bar) regulated
pressure range; 200 psi (1.4 MPa, 14 bar) steel
pressure gauge; 1/2 npt(f) inlet and outlet

Dimensions

Fitting Kits
For use when installing the fluid pressure regulator to
systems requiring the following material and
dimensions.

1
5

Kit 236609 – stainless steel
1/4 npt
gauge
port

Part No.

Description

112497

SWIVEL, union, 3/8–18 npsm x
1/4–18 npt
NIPPLE, 3/8–18 npsm x 1/4–18 npt

112494

Qty.
1
1

Kit 236610 – metric – stainless steel
2

Part No.

Description

112498

SWIVEL, union, 3/8–19 bspt x
1/4–18 npt
NIPPLE, 3/8–19 bspt x 1/4–18 npt

112495

Qty.
1
1

4

1/4 npt(f)
inlet

Carbon Steel Adapter Fittings

3

Part No.

Description

157705

SWIVEL, union, 3/8–18 npsm x
1/4–18 npt
NIPPLE, 3/8–18 npsm x 1/4–18 npt

183461
1/4 npt (f) outlet
1

5.81” (148 mm)

2

1.62” (41 mm)

3

3.75” (95 mm) diameter

4

6.6” ( 168 mm)

5

2.25” (57 mm)

16

308325

Qty.
1
1

Technical Data
Maximum fluid inlet pressure . . . . . . . . . . . . . . . . 100 psi
(0.7 Mpa, 7 bar)
Maximum fluid operating temperature . . . . . . . . 150d F
(66d C)
Regulated fluid pressure range
Models 236081, 236449, 241976 . . . . . . . . 3 to 30 psi
(.02 to 0.2 MPa, 0.2 to 2.1 bar)
Models 236216 and 236450 . . . . . . . . . . 20 to 100 psi
(.14 to 0.7 MPa, 1.4 to 7.0 bar)
Models 236281, 238159 . . . . . . . . . . . . . . 3 to 100 psi
(.02 to 0.7 MPa, 0.2 to 7 bar)
Maximum flow capacity . . . . . . . . . . 0.5 gpm (1.9 lpm)
with 70 cps fluid at 100 psi
(0.7 MPa, 7 bar) inbound pressure

Wetted Parts . . . . . . . . . . . . . . . . . acetal resins, PTFE,
tungsten carbide, 304 and 316 series
stainless steel, 17−4 PH stainless steel
Weight
Model 236081 . . . . . . . . . . . . . . . . . . 1.2 lb. (0.54 kg)
Model 236216 . . . . . . . . . . . . . . . . . 1.28 lb. (0.58 kg)
Model 236281 . . . . . . . . . . . . . . . . . . 1.6 lb. (0.73 kg)
Model 236449 . . . . . . . . . . . . . . . . . . 1.5 lb. (0.68 kg)
Model 236450 . . . . . . . . . . . . . . . . . . 1.6 lb. (0.73 kg)
Model 238159 . . . . . . . . . . . . . . . . 1.39 lb. (0.63 kg)
Model 241976 . . . . . . . . . . . . . . . . . . 1.5 lb. (0.68 kg)

308325

17

Performance Charts
Model 236081, 235449, 241976

REGULATED FLUID PRESSURE

psi bar
30

2.1

25 1.7
20 1.4
15 1.0
10 0.7
5 0.4
0

FLUID FLOW
0.0

gpm

lpm
ounces/min

0.1
0.38
13

0.2
0.76
26

0.3
1.14
38

0.4
1.51
51

0.5
1.89
64

0.4
1.51
51

0.5
1.89
64

Model 236216, 236450, 236281, and 238159

REGULATED FLUID PRESSURE

psi bar
100

7.0

90

6.3

80

5.6

70

4.9

60

4.2

50

3.5

40

2.8

30

2.1

20

1.4

10

0.7

0
gpm 0.0

lpm
ounces/min

18

308325

0.1
0.38
13

FLUID FLOW

0.2
0.76
26

0.3
1.14
38

Notes

308325

19

Graco Standard Warranty
Graco warrants all equipment 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 this number to identify the distributor closest to you:
1–800–367–4023 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.
Sales Office: Minneapolis
International Offices: Belgium, Korea, Hong Kong, Japan

GRACO INC.

P.O. BOX 1441

MINNEAPOLIS, MN

www.graco.com
PRINTED IN U.S.A.

20

308325

308325 03/1998 Rev. 12/02

55440–1441



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