Nordson RA-20 User manual

RA-20 Rotary Atomizer
Customer Product Manual
Part 237366-06
Issued 7/19
NORDSON CORPORATION •AMHERST, OHIO •USA
C
APPROVED
US
FM
For parts and technical support, call the Industrial Coating
Systems Customer Support Center at [phone] or
contact your local Nordson representative.
This document is subject to change without notice.
Check http://emanuals.nordson.com for the latest version.

Part 237366-06 E2019 Nordson Corporation
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 1997. 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
Iso-Flo, Nordson, and the Nordson logo are registered trademarks of
Nordson Corporation.
Viton is a registered trademark of E. I. DuPont de Nemours and Company.
Delrin is a registered trademark of E. I. DuPont de Nemours and
Company.

Table of Contents i
Part 237366-06
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Table of Contents
Safety 1-1..................................................
Introduction 1-1.............................................
Qualified Personnel 1-1......................................
Intended Use 1-1...........................................
Regulations and Approvals 1-1...............................
Personal Safety 1-2.........................................
High-Pressure Fluids 1-2..................................
Fire Safety 1-3.............................................
Halogenated Hydrocarbon Solvent Hazards 1-4..............
Action in the Event of a Malfunction 1-4........................
Disposal 1-4...............................................
Description 2-1.............................................
Introduction 2-1.............................................
Versions, Options, and System Configurations 2-1...............
Versions 2-1..............................................
Valve Options 2-2.........................................
Nozzles and Cup Options 2-2...............................
Speed Control Option 2-2..................................
Open-Loop Speed Controls 2-2...........................
Closed-Loop Speed Controls 2-3.........................
Pattern Control Option 2-3.................................
System Configurations 2-3.................................
Waterborne Application System 2-3.......................
Solventborne Application Systems 2-3.....................
Description 2-4..............................................
Turbine 2-4...............................................
Valves 2-4...............................................
Optional Turbine Speed Readout 2-4........................
Electrostatics 2-5.........................................
Installation 3-1.............................................
Mounting 3-1...............................................
Air Connections 3-2..........................................
Fluid Connections 3-3........................................
Waterborne Systems with Nordson Iso-Flo Unit 3-3...........
Solventborne Systems 3-4.................................
Paint Valve Only 3-4....................................
Paint, Solvent, and Dump Valves 3-4......................
Using the Grooving Tool 3-6................................
Fiber Optic Cable Installation (Optional) 3-7.....................
Electrostatic Connections 3-8.................................
IPS Cable 3-8............................................
High-Voltage Cable 3-9....................................

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Operation 4-1..............................................
Flushing 4-1...............................................
Startup 4-2.................................................
Modifying the Spray Pattern 4-3.............................
Modifying the Flow Rate 4-3................................
Shutdown 4-3...............................................
Long-Term Shutdown 4-4..................................
Cup Cleaning During Production 4-4...........................
Removing and Installing the Cup Assembly 4-4.................
Removing and Installing the Nozzle and Fluid Tube 4-5..........
Nozzle 4-5...............................................
Fluid Tube 4-6............................................
Disassembly 4-6........................................
Assembly 4-6..........................................
Maintenance 4-8............................................
Daily 4-8.................................................
Weekly 4-8...............................................
Periodic 4-8..............................................
All Systems 4-8........................................
RA-20 Rotary Atomizer Cable-Fed Version 4-9.............
RA-20 Rotary Atomizer IPS Version 4-9...................
RA-20 Rotary Atomizer Waterborne Version 4-9............
Resistance Checks Diagram 4-10............................
Troubleshooting 5-1........................................
Repair 6-1.................................................
Introduction 6-1.............................................
Preparation 6-1.............................................
Valve Replacement 6-1......................................
Valve Removal 6-2........................................
Valve Rebuild 6-2.........................................
Valve Installation 6-2......................................
Turbine Replacement 6-4.....................................
Turbine Removal 6-4......................................
Turbine Disassembly 6-6...................................
Turbine Assembly 6-8.....................................
Turbine Installation 6-8....................................
Service Illustration and Notes 6-9.............................

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Parts 7-1...................................................
Introduction 7-1.............................................
Using the Illustrated Parts List 7-1..........................
Cable-Fed RA-20 Rotary Atomizer 7-2.........................
IPS RA-20 Rotary Atomizer 7-6...............................
Waterborne RA-20 Rotary Atomizer 7-10.......................
Seal Kit 7-14.................................................
Adhesives, Sealants, and Lubricants 7-14.......................
Recommended Spare Parts 7-15...............................
Options 7-16.................................................
Cups and Distributors 7-16..................................
Premium Finish Cup 7-16...................................
Premium Finish Waterborne Emulsion Cup 7-16................
Nozzles 7-17..............................................
Fluid Tubes 7-17...........................................
Valve and Valve Kits 7-17...................................
Accessories 7-18.............................................
Specifications 8-1..........................................
Dimensions 8-1.............................................
Fluid Pressure and Flow 8-1..................................
Turbine Speed 8-2...........................................
Compressed Air 8-2.........................................
Air Pressure 8-2..........................................
Air Consumption 8-2......................................
Air Quality 8-3............................................
Spray Pattern Size 8-3.......................................
Electrostatic Voltage 8-3.....................................
Repair and Cleaning Times 8-3................................
Optional Speed Readout 8-3..................................

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Part 237366-06 E2019 Nordson Corporation

Safety 1-1
Part 237366-06
E2019 Nordson Corporation
Section 1
Safety
Introduction
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.

Safety
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Part 237366-06 E2019 Nordson Corporation
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 Material Safety Data Sheets (MSDS) 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.
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 MSDS for the injected fluid to the health care
provider.

Safety 1-3
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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.

Safety
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Part 237366-06 E2019 Nordson Corporation
Fire Safety (contd)
SProvide adequate ventilation to prevent dangerous concentrations of
volatile particles or vapors. Refer to local codes or your material MSDS
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 MSDS 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.
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.

Description 2-1
Part 237366-06
E2019 Nordson Corporation
Section 2
Description
Introduction
The RA-20 rotary atomizer is an electrostatic spray device incorporating an
air-powered turbine. It can apply most solvent and waterborne coating
materials, including high solids and metallics.
Versions, Options, and System Configurations
The RA-20 rotary atomizer is available in several versions with different
electrostatic charging configurations. Options and accessories include
solvent and dump valves, cups, nozzles, fluid tubes, and turbine speed
display.
Versions
Three versions of the RA-20 rotary atomizer are available:
Scable-fed
SIntegral Power Supply (IPS)
Swaterborne
The IPS and cable-fed versions charge the coating material as it is sprayed,
and are used with solventborne coating materials.
SThe cable-fed version uses a remote power supply and high-voltage
cable.
SThe IPS version includes an internal multiplier.
The waterborne version has no provisions for charging the coating material.
The coating material is charged before being pumped to the RA-20 rotary
atomizer.

Description
2-2
Part 237366-06 E2019 Nordson Corporation
Valve Options
The basic RA-20 rotary atomizer is equipped with a paint valve. Solvent
and dump valve kits can be added at the factory or in the field. Possible
configurations are:
Spaint valve only
Spaint and dump valve
Spaint and solvent valve
Spaint, solvent, and dump valve
Refer to the Parts section for kit part numbers.
Nozzles and Cup Options
Nozzles with orifice sizes ranging from 0.020 in. to 0.080 in. are supplied
with each RA-20 rotary atomizer. A 2-in. diameter finned cup is standard.
Optional smooth and finned 2-in. and 2.5-in. diameter cups as well as
premium finish cups are available. Each cup includes a standard distributor.
A premium finish cup requires a premium finish distributor. Special
distributors for use with emulsion coatings are available. Refer to the Parts
section for part numbers.
Speed Control Option
To monitor and control turbine speed, you can install the optional fiber-optic
module and fiber-optic cable. The cable transmits an optical signal from the
rotary atomizer to the fiber-optic module. The fiber-optic module converts
the optical signal to an electrical signal.
For open-loop speed controls, the electrical speed signal is routed to an
optional RPM indicator. For closed-loop speed controls the speed signal is
routed to a PLC controller. In some engineered systems the fiber-optic
module is not used: Instead, the fiber-optic circuit board is installed in a
control panel along with other system controls.
Refer to the Parts section for the fiber optic module, cable, and RPM
indicator part numbers.
Open-Loop Speed Controls
Open-loop speed controls use two air pressure regulators. One regulator
controls unloaded (no spray) turbine speed. The other controls loaded
(spraying) turbine speed. Air from the regulators is routed through a
solenoid valve. The solenoid valve switches turbine air from the unloaded
regulator to the loaded regulator when the paint valve is triggered.

Description 2-3
Part 237366-06
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Closed-Loop Speed Controls
Closed-loop speed controls use a voltage-to-pressure (V-to-P) or
current-to-pressure (I-to-P) transducer and a PLC controller to control
turbine air pressure at a set point. When the turbine is loaded (spraying)
the turbine slows. The speed controls signal the transducer to increase
turbine air pressure until turbine speed is at the set point. When the turbine
is unloaded (spraying stops) it speeds up. The speed controls signal the
transducer to decrease turbine air pressure until turbine speed is at the set
point.
Pattern Control Option
An optional pattern control kit is available to be installed on the rotary
atomizer. With this kit installed, the rotary atomizer produces a smaller,
more uniform spray pattern without compromising transfer efficiency. Refer
to the Pattern Control Kit instruction sheet for installation and parts
information.
System Configurations
Waterborne Application System
Equipment required for a waterborne system includes:
SWaterborne version of the RA-20 rotary atomizer
SNordson XPS 60 electrostatic power supply
SIFC-100 high-voltage cable
SNordson Iso-Flo voltage-block system
In this system, the electrostatic voltage is generated at the remote power
supply and conveyed by the high-voltage cable to the Iso-Flo unit. The
Iso-Flo unit charges the coating material and pumps it to the RA-20 rotary
atomizer through an insulated hose.
Solventborne Application Systems
Equipment required for a solventborne IPS system includes:
SIPS version of the RA-20 rotary atomizer
SLow-voltage cable
SIPS10 control unit
Equipment required for a solventborne cable-fed system includes:
SCable-fed version of the RA-20 rotary atomizer
SIFC-100 high-voltage cable
SXPS 115 electrostatic power supply
These systems charge the coating material at the atomizer.

Description
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Part 237366-06 E2019 Nordson Corporation
Description
See Figure 2-1. A cable-fed version of the RA-20 rotary atomizer is shown.
Turbine
The turbine (14) is air-powered. Turbine air provides the rotating force.
Brake air slows or stops the turbine quickly. The turbine shaft (11) floats on
a cushion of bearing air as it rotates. A fluid tube (7), inserted through the
center of the turbine shaft, provides a straight fluid path through the center
of the turbine.
Valves
The paint valve (19) controls the flow of coating material through the RA-20
rotary atomizer. Solvent and dump valves can be added. The valves are
air-operated. When the paint valve is triggered, coating material flows
through the valve, fluid tube, and nozzle (10), into the cup (8). The
distributor (9) spreads the coating material over the inside surface of the
cup as a thin film. The turbine spins the cup at high speed. The coating
material atomizes as it spins off the edges of the cup. Vector air flowing
between the cup and the charge ring (12) shapes the spray pattern.
The solvent valve allows the fluid path and cup to be cleaned quickly.
Closing the paint valve and opening the solvent valve allows solvent or
cleaning solution to flow through the fluid tube, nozzle, and cup.
The dump valve allows quick color changes by using the new coating
material to purge the old material out of the system. The dump valve
connects directly to the paint valve. The coating material supply hose is
connected directly to the dump valve inlet port. Another fluid hose connects
the dump valve outlet port to a waste container. Closing the paint valve and
opening the dump valve allows coating material to flow through the dump
valve to a waste container.
Optional Turbine Speed Readout
A transmitter assembly (16) is installed in each turbine. It contains a coil
and LED. Magnets embedded in the turbine wheel (15) generate a
pulsating current in the coil as they rotate past it. The LED converts the
current into pulses of visible light.
To use this optical signal, you can install an optional fiber-optic cable and
fiber-optic module. The cable transmits the optical signal to the module,
which converts it into an electrical signal, which can be transmitted to an
optional RPM indicator that displays the turbine speed, or to a PLC
controller.

Description 2-5
Part 237366-06
E2019 Nordson Corporation
Electrostatics
The cable-fed version of the RA-20 rotary atomizer uses a remote power
supply to generate the electrostatic voltage and a high-voltage IFC-100
cable (1) to deliver the voltage to the atomizer. The high resistance of the
cable, the barrel resistor (4), and the charge-ring resistors (6) limit current
draw from the power supply.
The IPS version of the RA-20 rotary atomizer uses a multiplier with a built-in
resistor to generate the electrostatic voltage.
In both the cable-fed and the IPS versions, the rotating cup picks up the
voltage from electrodes on the charge ring. The coating material picks up
an electrostatic charge as it flows over the inside surface of the cup.
The waterborne version has no electrostatic components. The coating
material is charged at the Iso-Flo unit and pumped to the RA-20 rotary
atomizer.
20
1 2 3 4 5 6
7
8
9
10
11
14 13 12151617181921
Figure 2-1 RA-20 Rotary Atomizer Components (Cable-Fed Version Shown)
1. High-voltage IFC-100 cable
2. Mounting stem
3. Cable adapter
4. Barrel resistor
5. Cable holder
6. Charge ring resistors
7. Fluid tube
8. Cup
9. Distributor
10. Nozzle
11. Turbine shaft
12. Charge ring
13. Front shroud
14. Turbine
15. Turbine wheel
16. Transmitter assembly
17. Interface plate
18. Fiber-optic cable (optional)
19. Paint valve
20. Rear shroud
21. Rear mounting plate

Description
2-6
Part 237366-06 E2019 Nordson Corporation

Installation 3-1
Part 237366-06
E2019 Nordson Corporation
Section 3
Installation
WARNING: Allow only qualified personnel to perform the following tasks.
Follow the safety instructions in this document and all other related
documentation.
Mounting
NOTE: If the nozzle or the fluid tube needs to be changed before starting
production, follow the instructions in the Repair section.
1. See Figure 3-1. Remove the oval-head screws (3) and the
rear shroud (2).
NOTE: Do not install the rear shroud until the air and fluid tubing,
fiber-optic cable (if used), and high-voltage or IPS cable have been
connected.
2. Secure the mounting stem (1) to a fixed stand, oscillator, or reciprocator.
Use a mounting device that allows vertical and horizontal adjustment of
the RA-20 rotary atomizer’s position.
1
23
Figure 3-1 RA-20 Rotary Atomizer Mounting
1. Mounting stem 2. Rear shroud 3. Oval-head screws

Installation
3-2
Part 237366-06 E2019 Nordson Corporation
Air Connections
WARNING: Do not bundle the fluid tubing with the air tubing or cables.
Doing so may allow the electrostatic voltage to burn pin holes in the fluid
tubing. Failure to observe this warning may result in equipment damage,
personal injury, or death.
CAUTION: Operating the RA-20 rotary atomizer without adequately filtering
the air supply, or without the specified bearing air pressure, will cause the
turbine to fail prematurely, and will void all warranties. Do not install any
shutoff valves in the bearing air tubing. Refer to the Specifications section
for air quality and pressure specifications.
Table 3-1 RA-20 Air Connections
Item Air Connection Fitting
Size (in.)
1BEARING (Bearing Air) 1/4
2SOLVENT TRIG. (Solvent trigger air) 1/4
3DUMP TRIG. (Dump trigger air) 1/4
4TURBINE (Turbine air) (see Note below)3/8
5PAINT TRIG. (Paint trigger air) 1/4
6BRAKE (Brake air) 1/4
7VECT. (Vector air) (see Note below)3/8
NOTE: The turbine and vector air fittings are for 3/8in. tubing. If you use
1/2in. tubing for vector or turbine air, route the tubing as close as possible to
the rotary atomizer, then use a 972242 reducer (1/2in. to 3/8in.) reducer and
a short piece of 3/8in. tubing to connect to the turbine and vector fittings.
1/2in. tubing is used for applications where 3/8in. tubing is too restrictive.
CABLE
VECT.
TURBINE
PAINT
TRIG.
DUMP
TRIG.
DUMP
FLUID
SPEED
CABLE
SOLVENT
TRIG.
BEARING
SOLVENT
BRAKE
7
1
2
3
4
5
6
Figure 3-2 Air Connections

Installation 3-3
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Fluid Connections
WARNING: Do not bundle the fluid tubing with the air tubing or cables.
Doing so may provide a path that will allow the electrostatic voltage to burn
pin holes in the fluid tubing. Failure to observe this warning may result in
equipment damage, personal injury, or death.
NOTE: If you are installing PTFE tubing, groove the ends before
connecting them to any fittings. Refer to Using the Grooving Tool in this
section.
Waterborne Systems with Nordson Iso-Flo Unit
See Figure 3-3. Make the following connections, depending on your RA-20
rotary atomizer configuration:
Paint Valve: Route 3/8-in. fluid tubing (6) from the Iso-Flo unit through the
FLUID hole in the rear mounting plate. Connect the tubing to the elbow
fitting on the dump valve (1).
Dump Valve: Route 3/8-in. fluid tubing (5) from a waste container through
the DUMP hole. Connect the tubing to the straight fitting on the end of the
dump valve.
Solvent Valve: Route 1/4-in. fluid tubing (4) from the solvent or cleaning
solution supply through the SOLVENT hole in the rear mounting plate.
Connect the tubing to the elbow fitting on the solvent valve (2).
1
2
3
4
5
6
Figure 3-3 Fluid Connections—Waterborne Systems
1. Dump valve
2. Solvent valve
3. Paint valve
4. 1/4-in. fluid tubing
5. 3/8-in. fluid tubing
6. 3/8-in. fluid tubing

Installation
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Part 237366-06 E2019 Nordson Corporation
Solventborne Systems
WARNING: If you are using solventborne coating materials, all fluid tubing
connected to the spray device must be grounded within 4.9 m (16 ft) of the
device. Ungrounded tubing can deliver a severe shock, or cause a fire or
explosion. Failure to observe this warning may result in equipment
damage, personal injury, or death.
See Figure 3-4. Make the following connections, depending on your RA-20
rotary atomizer configuration:
Paint Valve Only
1. Route 3/8-in. fluid tubing (6) from a grounding bracket through the FLUID
hole in the rear mounting plate. Connect the tubing to the elbow fitting
on the paint valve (3).
2. Install another length of 3/8-in. tubing between the grounding bracket
and the coating material supply.
3. Connect the grounding bracket to a true earth ground.
Paint, Solvent, and Dump Valves
1. Route 3/8-in. fluid tubing (6) from a grounding bracket through the FLUID
hole in the rear mounting plate. Connect the tubing to the elbow fitting
on the dump valve (1).
2. Route 3/8-in. fluid tubing (5) from a grounding bracket through the DUMP
hole on the rear mounting plate. Connect the tubing to the straight fitting
on the end of the dump valve.
3. Route 1/4-in. fluid tubing (4) from a grounding bracket through the
SOLVENT hole in the rear mounting plate. Connect the tubing it to the
elbow fitting on the solvent valve (2).
4. Connect 3/8-in. and 1/4-in. fluid tubing from the coating material supply,
solvent supply, and grounded waste container to the appropriate
bulkhead fittings on the grounding brackets (7).
5. Connect the grounding brackets to a true earth ground.