Instructions-Parts
Integrated Air
Control Modules
311239H
EN
®
Integrated air controls for use with NXT Model 2200, 3400, and 6500 Air Motors. For
professional use only.
100 psi (0.69 MPa, 6.9 bar) Maximum Regulated Working Pressure
NXT011, Series E
With locking air regulator and 110 psi (0.76 MPa, 7.6 bar) relief valve
NXT021, Series E
With non-locking air regulator and 110 psi (0.76 MPa, 7.6 bar) relief valve
NXT031, Series E
With locking air regulator and 85 psi (0.58 MPa, 5.8 bar) relief valve
Important Safety Instructions
Read all warnings and instructions in this manual
and in NXT air motor manual 311238. Save these
instructions.
Integrated Air Control Module shown
mounted on an NXT Air Motor
TI8233c
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Warnings
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama-
tion point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. Refer
back to these Warnings. Additional, product-specific warnings may be found throughout the body of this manual
where applicable.
WARNING
PRESSURIZED EQUIPMENT HAZARD
Fluid from the gun/dispense valve, leaks, or ruptured components can splash in the eyes or on skin and
cause serious injury.
•
Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning,
checking, or servicing equipment.
•
•
Tighten all fluid connections before operating the equipment.
Check hoses, tubes, and couplings daily. Replace worn or damaged parts immediately.
PERSONAL PROTECTIVE EQUIPMENT
You must wear appropriate protective equipment when operating, servicing, or when in the operating
area of the equipment to help protect you from serious injury, including eye injury, inhalation of toxic
fumes, burns, and hearing loss. This equipment includes but is not limited to:
•
•
•
•
Protective eyewear
Clothing and respirator as recommended by the fluid and solvent manufacturer
Gloves
Hearing protection
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
•
•
Do not operate the unit when fatigued or under the influence of drugs or alcohol.
Do not exceed the maximum working pressure or temperature rating of the lowest rated system
component. See Technical Data in all equipment manuals.
•
•
Use fluids and solvents that are compatible with equipment wetted parts. See Technical Data in all
equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete information
about your material, request MSDS forms from distributor or retailer.
Check equipment daily. Repair or replace worn or damaged parts immediately with genuine Graco
replacement parts only.
•
•
•
•
•
•
Do not alter or modify equipment.
Use equipment only for its intended purpose. Call your Graco distributor for information.
Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
Do not kink or over bend hoses or use hoses to pull equipment.
Keep children and animals away from work area.
Comply with all applicable safety regulations.
311239H
3
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Installation
Installation
3. Turn air regulator knob (C) fully counterclockwise.
Air Control Modules NXT011 and NXT031 (locking
air regulator) and NXT021 (non-locking air regula-
tor) are available.
C
1. Install supplied o-ring (43) into counterbore on upper
side of air control module (D). Fasten module to air
motor (M) with two supplied screws (44). Start
threading screws by hand before using a tool.
Torque to 20 ft-lb (27.1 N•m).
TI8322c
1
Screws are thread-forming. Start threading by hand
before using a tool. Torque to 20 ft-lb (27.1 N•m).
4. Hold the 3/4 npt(f) air inlet fitting (A) with a 1-5/16 in.
wrench to prevent it from turning while securely con-
necting the air supply hose.
M
A
TI8235c
43
D
44
1
TI8323c
2. Close bleed-type master air valve (B).
B
TI8322c
4
311239H
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Operation
Operation
Key for FIG. 1
Component Identification
A
B
C
D
E
F
Air Inlet, 3/4 npt(f)
Bleed-type Master Air Valve
Air Regulator Adjustment Knob (locking or non-locking)
Air Pressure Gauge
Air Filter (partially hidden)
Safety Relief Valve
Air Control Modules NXT011 and NXT031 (locking
air regulator) and NXT021 (non-locking air regula-
tor) include air line components in an integrated
assembly. See FIG. 1.
Bleed-type Master Air Valve (B)
Trapped air can cause the pump to cycle unexpectedly,
which could result in serious injury from splashing or
moving parts.
The bleed-type master air valve is required in your sys-
tem to relieve air trapped between it and the air motor
when the valve is closed.
Air Regulator (C)
Adjusts air pressure to the motor and fluid outlet pres-
sure of pump. View the gauge (D) to read air pressure.
Air Filter (E)
Removes harmful contaminants from entering the air
control module and air motor.
C
A
E
D
Safety Relief Valve (F)
B
F
Automatically opens to relieve air pressure, to prevent
pump overpressurization.
TI8233c
FIG. 1: Air Control Module Mounted on NXT Air Motor
311239H
5
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Operation
Startup
Locking Regulator (NXT011 and
NXT031 only)
1. Turn air regulator knob (C) fully counterclockwise.
1. To lock pressure setpoint, push knob (C) in.
C
C
TI8322c
TI8236c
A small amount of air venting
through knob assembly (18) is
normal.
2. Pull knob out to unlock, then adjust regulator to
desired pressure setpoint.
2. Open bleed-type master air valve (B).
C
TI8236c
Shutdown
B
TI8236c
Close bleed-type master air valve (B).
3. Turn air regulator knob (C) clockwise until air pres-
sure reaches desired setpoint.
C
B
TI8235c
TI8236c
6
311239H
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Troubleshooting
Troubleshooting
Problem
Cause
Solution
Excess air leaking from regulator
housing, or gauge shows unstable
regulated pressure.
Loose or worn diaphragm (17d).
Tighten housing or repair regulator
using repair kit NXT095. See page
10.
Worn seat (17e) or poppet (17f).
Repair regulator using repair kit
Main spool seals or relief valve worn. Replace with spool kit NXT098,
page 10.
Quick exhaust poppet (20b) or seat
(20a) worn.
Replace with quick exhaust repair kit
Air leaking from quick exhaust vent
hole.
Worn poppet o-ring (20c).
Replace with quick exhaust repair kit
Quick exhaust poppet (20b) or seat
(20a) worn.
Replace with quick exhaust repair kit
Air leaking from ball valve vent hole. Loose inlet fitting (32a).
Worn valve seals (32b, 32d).
Repair ball valve using repair kit
Regulator does not regulate pres-
sure.
Worn spool o-rings or worn/damaged
diaphragm (17d).
With air on and bleed-type master air
valve (B) open, unscrew the regulator
housing (19).
•
If pressure drops, diaphragm is
damaged. Install Repair Kit
•
If air leaks out bottom orifice,
spool o-rings are worn. Install
Gauge will not go to 0 when ball valve Washer (17c) is on wrong side of dia- Move washer (17c) to spring side of
is open and knob is turned coun-
ter-clockwise to 0.
phragm (17d).
diaphragm.
Pilot air seat (17e) is not fully seated. Turn pilot air seat (17e) in until if fully
seats.
Seal (3) is too thin or damaged caus- Replace snail seal (3). Seal should
ing air to leak into pilot air chamber. have a minimum thickness of 0.065
in. (1.65 mm).
311239H
7
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Troubleshooting
Problem
Cause
Solution
Gauge pressure increases above set Leak across rear spool (8) o-ring,
Replace spool assembly (8) with
spool kit NXT098.
point pressure.
which raises pilot air pressure even
while spraying.
Leak across front spool (8) o-ring,
Replace spool assembly (8) with
which raises air motor pressure when spool kit NXT098.
stalled.
Spool assembly (8) sticking.
Clean and lubricate spool (8). Add oil
to filter cup and run motor. Or, add a
lubricator to air supply.
Seal (3) leaking.
Replace snail seal (3). Seal should
have a minimum thickness of 0.065
in. (1.65 mm).
Side hole or through vent plugged on Clean through vent and side 0.015 in.
diaphragm tube (17d).
(0.381 mm) hole.
Air pressure drops when pump is
cycling.
Air hose has too small of an inside
diameter.
Use a 3/4 in. ID air hose.
Air supply is not adequate. (Check
gauge between hose and inlet.)
Use a larger air compressor.
Air filter (6) is plugged.
Replace air filter with kit NXT092. Or,
upgrade to a larger coalescing filter
with a manual drain (NXT094), or
with an automatic drain (NXT093).
manual 406659.
8
311239H
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Repair
Repair
Pressure Relief Procedure
Replace Filter Element
spraying and before cleaning, checking, or servicing
equipment.
2. Remove filter bowl (E) with wrench. Remove filter
element (G).
3. Install new filter element (G) on boss within the bowl
(E). Reinstall bowl 1/4 turn past handtight.
1. Close bleed-type master air valve (B).
G
B
E
TI8235c
TI8237b
2. Make sure gauge (D) reads zero (0). If not, pull on
pressure relief ring to bleed off air pressure.
Replace Gauge
wrench on the flats, unscrew old gauge (31).
D
TI8235c
3. Apply PTFE tape to threads before installing new
gauge.
3. Turn air regulator knob (C) fully counterclockwise.
C
TI8322c
311239H
9
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Repair
Spool Repair Kit NXT098
Quick Exhaust Repair Kit
NXT099
ratchet or a 3/8 in. deep well socket, remove 2
screws (37). Use a 3/8 in. open-end wrench to
remove the third screw (37) and disassemble front
cover (5) from housings (1, 2). Remove spring (16).
well socket, remove 2 screws (37). Use a 3/8 in.
open-end wrench to remove the third screw (37) and
disassemble front cover (5) from housings (1, 2).
Remove spring (16).
3. Pull the spool assembly (8) out of the housing (1).
Use a pliers to carefully pull the spool assembly out
by the tip.
3. Remove seat (20a) with large flat blade screwdriver.
Work out the poppet (20b) from the hole beneath the
poppet using an o-ring pick or an allen wrench.
4. Clean and lubricate the bore in the housing (1).
5. Install the new spool (8), spring (16), and o-ring (38).
4. Liberally grease housing threads to avoid damaging
o-ring (20c) on new poppet (20b). Install new poppet
with o-ring. Install new seat (20a) until it bottoms out
tight in the housing.
Regulator Repair Kit NXT095
open-end wrench, unscrew the regulator housing
(19).
3. Remove adjustment screw (17a), spring (17b), slip
ring (17c), diaphragm (17d), and washer (48).
4. Using #2 Phillips screwdriver, remove valve seat
(17e) slowly to avoid damaging flutes. Remove valve
assembly (17f) and spring (17g).
5. Use all new parts in the kit. Reinstall the spring
(17g), valve assembly (17f), washer (48), and valve
seat (17e). Tighten seat slowly to avoid damaging
flutes.
6. Do not apply any lubricant on the seating area of the
diaphragm (17d). Reinstall diaphragm, slip ring
(17c), spring (17b), and adjustment screw (17a).
10
311239H
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Repair
6. Install the new outboard seal (32b) and inlet
fitting (32a). Torque to 500 in-lb (56 N•m).
Ball Valve Seal Repair Kit
NXT097
The stem seal components (32e-32k) do not need
replacement unless leakage is noted. If necessary,
(32a) using a 1 5/16 in. wrench.
Remove the outboard seal (32b) with an o-ring pick.
9:00
Remove the ball (32c) using adhesive tape. Remove
the inboard seal (32d) with an o-ring pick.
7:30
TI8803a
6:00
FIG. 2. Valve Handle Positions
step 5.
5. Install the new inboard seal (32d). Install the new
ball (32c) with the notch (N) facing the front of the
module, so it engages the valve stem (33). The flat
spot on the ball must face inward.
311239H
11
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Parts
Parts
NXT011 and NXT031 Locking Integrated Air Control Module
NXT021 Non-Locking Integrated Air Control Module
20a 20b 20c
32a
2
7
37
1
2
32b
8
32c
8
1
32d 8
32g
3
37
32h
32f
32e
32j
32k
N
1
7
34 35 8 33
4
17g†
17f†
17f†
48†
6
8
8
16
38
4
17e†
50
5
17d†
17c†
17b†
17a†
5
31
TI8234d
18
3
18
1
2
3
4
5
6
Torque to 140 in-lb (16 N•m).
Torque to 500 in-lb (56 N•m).
Torque to 240 in-lb (27 N•m).
Torque to 130 in-lb (15 N•m).
Install bowl 1/4 turn past handtight.
Screws are thread-forming. Start
43
threading by hand before using a tool.
Torque to 20 ft-lb (27.1 N•m).
7
8
Apply blue thread lock sealant.
Apply lithium grease.
44
6
TI8323b
12
311239H
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Accessories
Accessories
Ref.
No.
1
2
3*
4
Part No. Description
Qty
Kit
Description
Locking knob kit
Non-locking knob kit
15G298 HOUSING, right
15G299 HOUSING, left
15G439 GASKET; nitrile
277109 BOWL, filter
277107 COVER, front
NXT092 ELEMENT, filter, 40 micron; pack-
age of 10
103209 O-RING; fluoroelastomer
NXT098 SPOOL, valve
119987 SPRING, compression
1
1
1
1
1
1
NXT090
NXT091
NXT092
NXT093
NXT094
NXT095
NXT096
NXT097
NXT098
NXT099
116635
5
6
Filter element, 40 micron, package of 10
Coalescing filter with automatic drain
Coalescing filter with manual drain
Regulator repair kit
7*
8
16
1
1
1
1
Seal repair kit
17† NXT095 KIT, repair, regulator; includes
items 17a-17g
18
Ball valve repair kit
NXT090 KNOB ASSEMBLY, regulator, lock-
ing; NXT011 and NXT031
NXT091 KNOB ASSEMBLY, regulator,
non-locking; NXT021
NXT099 KIT, relief valve; includes items
20a-20c
1
1
1
Spool valve kit
Relief valve kit
Element replacement kit. For use with
kits NXT093 and NXT094.
20
31 108190 GAUGE, pressure, air
1
1
32
NXT097 KIT, repair, ball valve; 3/4 npt(f)
inlet; includes items 32a-32k
15F726 STEM, ball valve
33
34
35*
37
1
1
1
7
15F727 INSERT, threaded, ball valve
C20145 O-RING; buna-N
119426 SCREW, machine, hex washer hd,
thread-forming; 1/4-20 x 1 in. (25
mm)
38*
43
44
115078 O-RING; nitrile
110782 O-RING; buna-N
120089 SCREW; 3/8-16 x 1-3/4 in. (44 mm)
1
1
2
1
1
48† 187509 WASHER, flat
50
113498 RELIEF VALVE, safety; 110 psi
(0.76 MPa, 7.6 bar); NXT011 and
NXT021
108124 RELIEF VALVE, safety; 75 psi (0.51
MPa, 5.1 bar); NXT031
1
*
Parts included in Seal Repair Kit NXT096 (purchase
separately).
Recommended spare parts. Keep on hand to avoid
downtime.
† Parts included in Air Regulator Repair Kit NXT095
(purchase separately.)
311239H
13
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Schematic Diagram
Schematic Diagram
Pilot Valve
Pilot Vent
Bleed-Type Ball Valve
Air Filter
Diaphragm
AIR IN
Atmosphere
Quick Air Purge
ATMOSPHERE
Air Pressure
Gauge
Air Regulator
Adjustment Knob
Supply Pressure
Spool
TO MOTOR
Regulated Pressure
Pilot Pressure
Overpressure Safety
Relief Valve
14
311239H
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Technical Data
Technical Data
Maximum air inlet pressure
Maximum regulated working pressure
Maximum operating temperature
Air Inlet Size
140 psi (0.97 MPa, 9.7 bar)
100 psi (0.69 MPa, 6.9 bar)
140°F (60°C)
3/4 npt(f)
Air Gauge Port Size
Height
1/8 npt(m)
6.5 in. (165 mm)
6.75 in. (171 mm)
4.75 in. (121 mm)
5.1 lb (2.3 kg)
Width
Depth
Weight
Materials of construction
Chrome, brass, aluminum, acetal, fluorocarbon rubber,
nylon, nitrile rubber, fluoroelastomer
311239H
15
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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 procédures concernées.
Graco Information
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.
Original instructions. This manual contains English. MM 311239
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA
Copyright 2006, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.
Revised 07/2011
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