Nordson Auto-Flo II Reference guide

Auto-FlotII
Automatic Dispense Valves
Customer Product Manual
Part 1104010−04
Issued 02/19
NORDSON CORPORATION •AMHERST, OHIO •USA
For parts and technical support, call the
Finishing Customer Support Center at [phone].
Check http://emanuals.nordson.com/finishing for the latest version.
This document is subject to change without notice.

Part 1104010−04 E2018 Nordson Corporation
ents
Table of Contents
Safety 1.......................................
Qualified Personnel 1.........................
Intended Use 1..............................
Regulations and Approvals 1..................
Personal Safety 1............................
High-Pressure Fluids 2.....................
Fire Safety 2................................
Halogenated Hydrocarbon Solvent Hazards 2.
Action in the Event of a Malfunction 3...........
Disposal 3..................................
Description 4..................................
Theory of Operation 4........................
Specifications 5...............................
General 5...................................
Standalone Dispense Valve 6..................
Manifold-Mount Dispense Valve 7...............
Water Requirements for
Temperature Conditioning 8...................
Water Types 8............................
Corrosion Levels 8.........................
Biocide Water Treatment 8..................
Installation 10..................................
Standalone Dispense Valve 10..................
Manifold Mount Dispense Valve 11..............
Heater Block Assembly 12......................
Manifold Heater Block Assembly 13..............
Select a Nozzle 14............................
Operation 15...................................
Purge the Dispense Valve 15...................
How to Clear a Blocked Nozzle 15..............
Maintenance 16................................
Troubleshooting 16.............................
Repair 17......................................
Packing Cartridge 17..........................
Remove the Packing Cartridge 17............
Install the Packing Cartridge 17..............
Parts 18.......................................
Standalone Dispense Valves 18.................
Standard Standalone Dispense Valves 18.....
XD Standalone Dispense Valves 20...........
Manifold-Mount Dispense Valves 22.............
Standard Manifold-Mount Dispense Valves 22..
XD Manifold Mount Dispense Valves 24.......
Dispense Valve Options 26.....................
Heater Block Assembly 26...................
In-Line Manifold Heater Block Assembly 28....
Dual Piston Kit, 40 psi, Auto-Flo II 30..........
Contact Us
Nordson Corporation welcomes requests for information, comments, and
inquiries about its products. General information about Nordson can be
found on the Internet using the following address:
http://www.nordson.com.
Address all correspondence to:
Nordson Corporation
Attn: Customer Service
555 Jackson Street
Amherst, OH 44001
Notice
This is a Nordson Corporation publication which is protected by copyright.
Original copyright date 2012. No part of this document may be
photocopied, reproduced, or translated to another language without the
prior written consent of Nordson Corporation. The information contained
in this publication is subject to change without notice.
Trademarks
Nordson and the Nordson logo are registered trademarks
of Nordson Corporation.
Auto-Flo is a trademark of Nordson Corporation
All other trademarks are the property of their respective owners.

Change Record i
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tents
Change Record
Revision Date Change
01 8/10 Released
02 10/15 Includes heater block assembly
03 8/18 Added standalone heater block assembly instructions, added manifold
heater block assembly instructions, added information for heater block
assemblies 1606151 and 1606152, added manifold information for
1609339, added kit number 1614223
04 02/19 Added low wattage guns and heaters for PLC controllers

Change Record
ii
Part 1104010−04 E2018 Nordson Corporation

Auto-Flo II Automatic Dispense Valves 1
Part 1104010−04
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Safety
Read and follow these safety instructions. Task- and
equipment-specific warnings, cautions, and instructions
are included in equipment documentation where
appropriate.
Make sure all equipment documentation, including these
instructions, is accessible to persons operating or
servicing equipment.
Qualified Personnel
Equipment owners are responsible for making sure that
Nordson equipment is installed, operated, and serviced
by qualified personnel. Qualified personnel are those
employees or contractors who are trained to safely
perform their assigned tasks. They are familiar with all
relevant safety rules and regulations and are physically
capable of performing their assigned tasks.
Intended Use
Use of Nordson equipment in ways other than those
described in the documentation supplied with the
equipment may result in injury to persons or damage to
property.
Some examples of unintended use of equipment include
Susing incompatible materials
Smaking unauthorized modifications
Sremoving or bypassing safety guards or interlocks
Susing incompatible or damaged parts
Susing unapproved auxiliary equipment
Soperating equipment in excess of maximum ratings
Regulations and Approvals
Make sure all equipment is rated and approved for the
environment in which it is used. Any approvals obtained
for Nordson equipment will be voided if instructions for
installation, operation, and service are not followed.
Personal Safety
To prevent injury follow these instructions.
SDo not operate or service equipment unless you are
qualified.
SDo not operate equipment unless safety guards,
doors, or covers are intact and automatic interlocks
are operating properly. Do not bypass or disarm any
safety devices.
SKeep clear of moving equipment. Before adjusting or
servicing moving equipment, shut off the power
supply and wait until the equipment comes to a
complete stop. Lock out power and secure the
equipment to prevent unexpected movement.
SRelieve (bleed off) hydraulic and pneumatic pressure
before adjusting or servicing pressurized systems or
components. Disconnect, lock out, and tag switches
before servicing electrical equipment.
SWhile operating manual spray guns, make sure you
are grounded. Wear electrically conductive gloves or
a grounding strap connected to the gun handle or
other true earth ground. Do not wear or carry
metallic objects such as jewelry or tools.
SIf you receive even a slight electrical shock, shut
down all electrical or electrostatic equipment
immediately. Do not restart the equipment until the
problem has been identified and corrected.
SObtain and read Safety Data Sheets (SDS) for all
materials used. Follow the manufacturer’s
instructions for safe handling and use of materials,
and use recommended personal protection devices.
SMake sure the spray area is adequately ventilated.
STo prevent injury, be aware of less-obvious dangers
in the workplace that often cannot be completely
eliminated, such as hot surfaces, sharp edges,
energized electrical circuits, and moving parts that
cannot be enclosed or otherwise guarded for
practical reasons.

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High-Pressure Fluids
High-pressure fluids, unless they are safely contained,
are extremely hazardous. Always relieve fluid pressure
before adjusting or servicing high pressure equipment. A
jet of high-pressure fluid can cut like a knife and cause
serious bodily injury, amputation, or death. Fluids
penetrating the skin can also cause toxic poisoning.
If you suffer a fluid injection injury, seek medical care
immediately. If possible, provide a copy of the SDS for
the injected fluid to the health care provider.
The National Spray Equipment Manufacturers
Association has created a wallet card that you should
carry when you are operating high-pressure spray
equipment. These cards are supplied with your
equipment. The following is the text of this card:
WARNING: Any injury caused by high pressure
liquid can be serious. If you are injured or even
suspect an injury:
SGo to an emergency room immediately.
STell the doctor that you suspect an injection injury.
SShow them this card
STell them what kind of material you were spraying
MEDICAL ALERT-AIRLESS SPRAY WOUNDS: NOTE
TO PHYSICIAN
Injection in the skin is a serious traumatic injury. It is
important to treat the injury surgically as soon as
possible. Do not delay treatment to research toxicity.
Toxicity is a concern with some exotic coatings injected
directly into the bloodstream.
Consultation with a plastic surgeon or a reconstructive
hand surgeon may be advisable.
The seriousness of the wound depends on where the
injury is on the body, whether the substance hit
something on its way in and deflected causing more
damage, and many other variables including skin
microflora residing in the paint or gun which are blasted
into the wound. If the injected paint contains acrylic latex
and titanium dioxide that damage the tissue’s resistance
to infection, bacterial growth will flourish. The treatment
that doctors recommend for an injection injury to the
hand includes immediate decompression of the closed
vascular compartments of the hand to release the
underlying tissue distended by the injected paint,
judicious wound debridement, and immediate antibiotic
treatment.
Fire Safety
To avoid a fire or explosion, follow these instructions.
SGround all conductive equipment. Use only
grounded air and fluid hoses. Check equipment and
workpiece grounding devices regularly. Resistance
to ground must not exceed one megohm.
SShut down all equipment immediately if you notice
static sparking or arcing. Do not restart the
equipment until the cause has been identified and
corrected.
SDo not smoke, weld, grind, or use open flames
where flammable materials are being used or stored.
SDo not heat materials to temperatures above those
recommended by the manufacturer. Make sure heat
monitoring and limiting devices are working properly.
SProvide adequate ventilation to prevent dangerous
concentrations of volatile particles or vapors. Refer
to local codes or your material SDS for guidance.
SDo not disconnect live electrical circuits when
working with flammable materials. Shut off power at
a disconnect switch first to prevent sparking.
SKnow where emergency stop buttons, shutoff valves,
and fire extinguishers are located. If a fire starts in a
spray booth, immediately shut off the spray system
and exhaust fans.
SShut off electrostatic power and ground the charging
system before adjusting, cleaning, or repairing
electrostatic equipment.
SClean, maintain, test, and repair equipment
according to the instructions in your equipment
documentation.
SUse only replacement parts that are designed for use
with original equipment. Contact your Nordson
representative for parts information and advice.
Halogenated Hydrocarbon
Solvent Hazards
Do not use halogenated hydrocarbon solvents in a
pressurized system that contains aluminum components.
Under pressure, these solvents can react with aluminum
and explode, causing injury, death, or property damage.
Halogenated hydrocarbon solvents contain one or more
of the following elements:
Element Symbol Prefix
Fluorine F “Fluoro-”
Chlorine Cl “Chloro-”
Bromine Br “Bromo-”
Iodine I “Iodo-”
Check your material SDS or contact your material
supplier for more information. If you must use
halogenated hydrocarbon solvents, contact your Nordson
representative for information about compatible Nordson
components.

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Action in the Event of a
Malfunction
If a system or any equipment in a system malfunctions,
shut off the system immediately and perform the
following steps:
SDisconnect and lock out system electrical power.
Close hydraulic and pneumatic shutoff valves and
relieve pressures.
SIdentify the reason for the malfunction and correct it
before restarting the system.
Disposal
Dispose of equipment and materials used in operation
and servicing according to local codes.

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Description
See Figure 1. The Auto-FlotII Automatic
Dispense Valve is used in a variety of applications
to dispense adhesives, sealants, and other
materials. Made of aluminum, the valve is
lightweight and versatile.
Refer to the Specifications section for more
information.
NOTE: Throughout the remainder of this manual
the Auto-Flo II Dispense Valve is referred to as the
dispense valve.
Theory of Operation
See Figure 1. When air is supplied to the
valve-open air inlet (1), the piston is pushed
upward, pulling the piston stem (3) off the seat (4).
Material flows into the material inlet (2) and out of
the nozzle.
When air is shut off from the valve-open air inlet (1)
and supplied to the valve-close air inlet (5), air
pressure combined with the spring on top of the
piston forces the piston stem back into the seat and
stops material dispensing.
The dispense valve can be temperature
conditioned using a temperature control unit (TCU).
The TCU maintains coating material at the desired
application temperature by monitoring the
temperature conditioned water that flows through
the water ports in the valve body.
NOTE: Refer to Water Requirements for
Temperature Conditioning in the Specifications
section for information on the types of water to use
with the dispense valve.
5
2
4
3
1
STANDARD STANDALONE
DISPENSE VALVE
XD MANIFOLD MOUNT
DISPENSE VALVE
WATER
PORTS
Figure 1 Typical Auto-Flo II Classic Dispense Valves

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Specifications
Refer to the following paragraphs for specifications.
General
Dimensions See Figure 2.
Approximate Weight, oz (kg) XD: 23 (0.649), Standard: 18 (0.508)
Maximum static fluid
pressure rating, psi (bar)
5000 (345)
Actuating air pressure, psi (bar) 60−120 (4−8)
3.25 in.
(8.25 cm)
0.565 in.
(1.43 cm)
4.78
(12.14 cm)
OPTIONAL
1.5 in.
(3.81 cm)
RTD KIT
1.72 in.
(4.36 cm)
1.72 in.
(4.36 cm)
3.7 in.
(94 mm)
1.75 in.
(4.45 cm)
TYPICAL STANDARD
DISPENSE VALVE
TYPICAL XD
DISPENSE VALVE
3/8NPSM THD.
Figure 2 Approximate Dimensions

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Standalone Dispense Valve
See Figure 3 for standalone dispensing valve mounting specifications.
A
0.187 in
0.60 in. min.
REF
(4.75 mm)
(15.24 mm min.)
1.062 in.
SUGGESTED MOUNTING ARRANGEMENT
STANDARD GUN MOUNTING DIMENSIONS
BC
2X TAP DRILL,
M5X0.8−6H THD
.014 A B C
REF REF
2X ƕ0.323ń.325 .187
SHOWN
.001 A
1
12
3
(26.97 mm)
0.874 in.
(22.2 mm)
1.08 in.
(27.4 mm)
0.610 in.
(15.5 mm)
0.625 in.
(15.8 mm)
0.500 in.
(12.7 mm)
1.170 in.
(29.7 mm)
1.60 in.
(40.64 mm)
3.31 in.
(84.07 mm)
A
A
Figure 3 Standalone Mounting Specifications
1. Mounting plate holes
2. Dispensing valve body
3. Hollow dowel pin

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Manifold-Mount Dispense Valve
See Figure 4 for specifications when mounting the
dispensing valve on a manifold. In addition to drilling the
mounting holes (3), drill holes for the material inlet (1)
and the air inlet (2).
The specifications for the material inlet (1) follows:
Sdrill 0.230−0.240 in. diameter x the required depth
Scounterbore 0.375−0.379 in. diameter x 0.050−0.052
in. deep
Two holes for temperature conditioning fittings (2) are
located below the mounting holes. If the manifold mount
dispensing valve needs to be temperature conditioned,
drill the mounting surface holes as follows:
Sdrill two through holes 0.250 in. diameter for water
Scounterbore 0.437−0.441 in. diameter x 0.050−0.052
in. deep
1.062 in.
(26.97 mm)
0.531 in.
(13.49 mm)
0.652 in.
(16.56 mm)
1.080 in.
(27.43 mm)
0.54 in.
(13.72 mm)
1.062 in.
(26.97 mm)
0.156 in.
(3.96 mm)
1
2
3
4
5
2
2X ƕ0.323ń.325 .187
.001 A
1.38 in.
(35.1 mm)
0.282 in.
(7.16 mm)
A
A
Figure 4 Manifold−Mount Dimensions
1. Material inlet
2. Temperature Conditioning
3. Mounting surface holes
4. Dispensing valve body
5. Hollow dowel pin

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Water Requirements for
Temperature Conditioning
The temperature conditioning section is
constructed of the following materials. Always refer
to this list if different water, corrosion inhibitors or
biocides other than those listed in the following
sections are used.
Aluminum PVC Plastic
Black Iron Pipe Polyurethane
Brass Stainless Steel
Buna Rubber Steel
Copper Viton
Nylon PTFE
Water Types
Refer to Table 1. To minimize the introduction of
contaminants that may degrade system
components, review these guidelines before
selecting the type of water to use.
NOTE: Water types are listed in order
of preference.
Corrosion Levels
To maintain proper performance, minimum levels of
corrosion to aluminum and copper must be
maintained. To maintain safe operation keep the
corrosion levels of
Saluminum at or below 3 mil/year (0.003 in./yr).
Scopper at or below 1 mil/year (0.001 in./yr).
When adding water to the system, corrosion
inhibitor must be added. CorrShield MD405
corrosion inhibitor is shipped with
temperature-conditioned systems. This is a
Molybdate-based corrosion inhibitor that contains
an Azole additive to protect copper and is used in
the concentration of 1.5 ounces per gallon of water
to maintain a concentration of 250−350 ppm.
The Ford Tox number for CorrShield MD 405
is 149163.
The GM FID number for CorrShield MD 405
is 225484.
Biocide Water Treatment
Do not use the following Biocides:
Soxidizers, such as chlorine, bromine, hydrogen
peroxide, iodine, ozone, etc.
Scationic, or positively charged biocides.
Biocides for use with CorrShield MD405 are
BetzDearborn Spectrus NX114. The
recommended concentration of Spectrus NX114 is
150−PPM which is 0.017 oz./gal (0.5 ml/gal).
The Ford Tox Number for Spectrus NX114
is 148270.

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Table 1 Water Types
Water Description
1. Distilled No minerals and chemicals
Lacks the nutrients necessary to support biological growth and the minerals that wear
away at system components
Neutral nature reduces interaction with additives used to protect the system
NOTE
Distilled water is the best choice for use in the
temperature conditioning section.
2. Well Contains an abundance of minerals that can support plant and animal life
Contains minerals like calcium and iron that are abrasive; accelerates wear and tear
on components
NOTE
If well water is the only option available, it must
be softened to reduce the mineral content.
3. City Contains chlorine that can degrade all metals including stainless steel
Hard on most non−metals
Usually contains an abundance of minerals that are capable of supporting plant and
animal life; accelerates wear on components
4. Weld (Tower) Often heavily treated both for bacterial suppression and to make it more compatible
with the welding and cooling tower processes
Treatment process usually involves some aggressive chemicals that can degrade
metals, plastics and other materials
Usually contains an abundance of metals and other contaminants picked up from the
welding and cooling tower processes that can interfere with the components of the
temperature control system
5. DI ! CAUTION !
Do not use DI water in this system. DI water draws
free electrons from metal to normalize ion levels. This
process causes degradation of metals.

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Installation
Installation procedures are provided for standalone
and manifold mount dispense valves.
WARNING: Allow only qualified personnel
to perform the following tasks. Follow the
safety instructions in this document and all
other related documentation.
NOTE:
SThe following procedures are only for a
typical installation. Refer to the applicable
System Documentation that shipped with
the system for specific installation data.
SThe dispense valve can be mounted to
fixed, mobile, and robotic fixtures. Mounting
configurations may vary. Consult a local
Nordson representative for specific
application data.
SAn RTD sensor is available for the dispense
valve. Refer to the drawing that is included
with RTD Sensor Kit 1075202 to install an
RTD sensor.
Standalone Dispense Valve
1. See Figure 5. Insert the dowel pins (10) into
the dispense valve.
2. Install the dispense valve to the applicable
fixture (11) using the screws (4). Tighten the
screws to 60 in.-lb (6.7 N•m).
3. Perform the following:
a. Remove the screw (7), washer (8), and
swivel lock (9) from the dispense valve.
b. Install the applicable fluid fitting (6) into the
fluid inlet port (5) and tighten securely.
c. Install the swivel lock (9) to the fluid
fitting (6) using the washer (8) and
screw (7). Tighten the screw securely.
NOTE: Supply air must be oil-free and between
60−120 psi (4−8 bar).
4. Connect the open and close air lines to
the fittings (1, 2).
5. Perform the following only for temperature
conditioned dispense valves:
a. Install 1/8 NPT tube fittings into the
temperature conditioning ports (3).
b. Connect the lines from the TCU to the tube
fittings.
4
1
2
93
5
8
7
6
11
10
THIS PART IS SHIPPED LOOSE WITH THE DISPENSE VALVE.
Figure 5 Typical Standalone Installation (XD Temperature Condition Dispense Valve Shown)
1. Air close port ⅛NPT thread
2. Air open port ⅛NPT thread
3. Temperature conditioning ports
⅛NPT thread
4. Screw, socket, M5 x 60
5. Fluid inlet O-ring port size-6
9/16-18 UNF-2B thread
6. Fluid fitting (application specific)
7. Screw, hex, cap, M5 x 12
8. Washer
9. Swivel lock
10. Dowel pin
11. Applicable fixture (application
specific)

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Manifold Mount Dispense Valve
Refer to Manifold Mount in the Specifications
Section for mounting specifications if necessary.
1. See Figure 6. Lubricate the O-rings (1,2) with
Mobil SHC 100 grease and install them into the
mating surface.
2. Install the dispense valve to the manifold using
the screws (3). Tighten the screws to
60 in.-lb (6.7 N•m).
NOTE: Supply air must be oil-free and between
60−120 psi (4−8 bar).
3. Connect the open and close air lines to
the fittings (4, 5).
AIR CLOSE PORT:
1/8 NPT THREAD
AIR OPEN PORT:
1/8 NPT THREAD
RTD PORT:
O-RING PORT SIZE-6
9/16-18 UNF-2B THREAD
5
4
3
1
2
THIS PART IS SHIPPED LOOSE WITH THE DISPENSE VALVE.
Figure 6 Manifold Mount Dispense Valve (XD Manifold Mount Dispense Valve Shown)
1. O-ring, Viton, 0.301 ID x 0.070
2. O-ring, Viton, 0.239 ID x 0.070
3. Screw, socket, M5 x 60
4. Air open port ⅛NPT thread
5. Air close port ⅛NPT thread

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Heater Block Assembly
Use the following instructions to install the heater
block assembly to the Auto-Flo II system.
Refer to Standalone Dispense Valve in the
Specifications section for mounting specifications if
necessary.
1. Remove and discard the screws that come with
the Auto-Flo gun.
2. See Figure 7. Insert the dowel pins (3) into the
heater block (4).
3. Align insulator plate (2) over dowel pins and
attach to heater block (4).
4. Align the heater block to the applicable fixture
(1) using the dowel pins.
5. Hold the heater block (4) in place and mount
the dispense valve (5) onto the heater block by
aligning the dowel pins.
6. Install the dispense valve (5) onto the heater
block and applicable fixture by inserting the
long screws (6) provided with the heater block.
Tighten the screws to 60 in.-lb (6.7 N•m).
Refer to the Auto-Flo II Heater Block Assemblies
Instruction Sheet for servicing instructions.
10013624
1
2
3
4
5
6
THIS PART IS SHIPPED LOOSE WITH THE HEATER BLOCK.
Figure 7 Heater Block Assembly Installation
1. Applicable fixture
2. Insulator plate
3. Dowel pins
4. Heater block
5. Dispense valve
6. Screw, socket, M5 x 100,
black

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Manifold Heater Block Assembly
Use the following instructions to install the manifold
heater block assembly to the Auto-Flo II system.
Refer to Manifold-Mount Dispense Valve in the
Specifications Section for mounting specifications if
necessary.
1. See Figure 8. Align the mounting bracket (1) to
the heater block assembly (2).
2. Hold the heater block in place and install the
M10 screw (4) through the center hole of the
mounting bracket and heater block as shown.
3. Align the bracket to the appropriate adjustable
arch hole (3) on the heater block and install the
M6 screw (5) to secure.
4. Tighten the screws to 60 in.-lb (6.7 N•m).
Refer to the Auto-Flo II Heater Block Assemblies
Instruction Sheet for servicing instructions.
1
2
3
4
5
MOUTING BRACKET IS APPLICATION SPECIFIC AND MUST
BE PURCHASED SEPERATELY
Figure 8 Manifold Heater Block Assembly Installation
1. Mounting bracket example
2. Heater block
3. Adjustable arch holes
4. Screw, M10 x 80
5. Screw, M6 x 80

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Select a Nozzle
Nozzle selection depends on the type of material
being dispensed, the desired bead size, and the
production rate requirements.
CAUTION: Lubricate the dispense valve
threads with a lubricant that is compatible
with the dispense material to prevent the
nozzle nut from becoming glued to them.
If the threads are not lubricated, damage
may occur to the valve body when
removing the nozzle nut.
1. See Figure 9. Lubricate the threads (2) on the
dispense valve (1) with a lubricant that is
compatible with the dispense material.
2. Install the nozzle (3) using the nozzle nut (4).
Tighten the nozzle nut securely.
2
1
4
3
Figure 9 Typical Nozzle Installation

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Operation
WARNING: Allow only qualified personnel
to perform the following tasks. Follow the
safety instructions in this document and all
other related documentation.
Personnel performing the following
procedures must know how to safely
operate the application system.
Operation is dependent upon the system
application requirements and the material delivery
system. Refer to the applicable System
Documentation that shipped with the system for
detailed operating procedures.
Purge the Dispense Valve
NOTE: Perform the following procedure prior to
putting a new dispense valve in to service for the
first time.
1. Place a material waste container under
the nozzle.
2. Purge the dispense valve until material flows
freely from the nozzle.
How to Clear a Blocked Nozzle
1. Shut off air pressure to the material unloader.
2. Bleed off residual pressure through the in-line
pressure relief valve in the material supply line.
3. Shut off and lock out all power to the
dispense system.
4. See Figure 9. Carefully remove the nozzle
nut (4) and nozzle (3) from the dispense
valve (1). Clean the nozzle and dispense valve
threads (2) with a compatible solvent.
CAUTION: Lubricate the dispense valve
threads with a lubricant that is compatible
with the dispense material to prevent the
nozzle nut from becoming glued to them.
If the threads are not lubricated, damage
may occur to the valve body when
removing the nozzle nut.
5. Lubricate the dispense valve threads (2) with a
compatible lubricant.
6. Install the nozzle (3) using the nozzle nut (4).
Tighten the nozzle nut securely.

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Maintenance
WARNING: Allow only qualified personnel
to perform the following tasks. Follow the
safety instructions in this document and all
other related documentation.
System or material pressurized. Relieve
pressure. Failure to observe this warning
may result in serious injury or death.
NOTE: The frequencies listed are only guidelines.
It may be necessary to adjust frequencies due to
the facility enviornment, process parameters,
material being applied, or experience. Always
perform preventive maintenance procedures
according to the facility maintenance schedule.
Frequency Task
Daily Check the nozzle for wear. Replace if necessary.
Periodically Check the air lines and the material supply hose for leaks or damage. Replace lines and
hoses if necessary.
Make sure the dispense valve is mounted securely.
Clean the filter in the air supply line.
Troubleshooting
WARNING: Allow only qualified personnel
to perform the following tasks. Follow the
safety instructions in this document and all
other related documentation.
This section contains troubleshooting procedures.
These procedures cover only the most common
problems that you may encounter. If you cannot
solve the problem with the information given here,
contact your local Nordson representative for help.
Problem Possible Cause Corrective Action
1. Leaking around
nozzle or nozzle nut
Dirty or damaged metal sealing
surfaces
Clean the nozzle if dirty. Replace the
nozzle if worn.
2. Leaking through weep
hole in valve body
Worn packing cartridge Standard Dispense Valve: Replace
the cartridge/seal assembly.
XD Dispense Valve: Replace the
cartridge retainer.
3. Dispense valve
responds slowly
Air piston assembly dry or worn Lubricate or replace the piston/stem
assembly.
Low air pressure to solenoid Increase the air pressure to the
solenoid.
Long air supply lines to valve Mount the solenoid as close as
possible to the valve.