Ransburg A12787 User Manual
SERVICE MANUAL
LN-9270-12.3
(REPLACES: LN-9270-12.2)
June — 2013
Aerobell 168
TM
MODEL:A12787
IMPORTANT: Before using this equipment, carefully read
SAFETY PRECAUTIONS, starting on page 1, and all instructions
in this manual. Keep this Service Manual for future reference.
Service Manual Price: $50.00 (U.S.)
Service Manual Price: $50.00 (U.S.)
Service Manual Price: $50.00 (U.S.)Service Manual Price: $50.00 (U.S.)
LN-9270-12.3
Aerobell 168 - Contents
CONTENTS
SAFETY: 1-7
SAFETY PRECAUTIONS ......................................................................................................... 1
HAZARDS / SAFEGUARDS................................................................................................... 2-7
INTRODUCTION: 8-26
GENERAL DESCRIPTION ........................................................................................................ 8
OPERATING CHARATERISTICS AND SPECIFICATIONS ................................................. 9-14
DIMENSIONAL CHARATERISTICS……………………………………………………………..15-22
IMPORTANT NUMBERS……………………………………………………………………………..23
HOSE SPECIFICATIONS…………………………………………………………………………25-26
INSTALLATION: 27-38
GENERAL INFORMATION ..................................................................................................... 27
AIR FILTRATION REQUIREMENTS ....................................................................................... 28
TYPICAL APPLICATOR CONFIGURATIONS .................................................................... 29-30
INSTALLATION REQUIREMENTS .................................................................................... 31-38
OPERATION: 39-42
BASIC OPERATIONS ........................................................................................................ 39-42
MAINTENANCE: 43-90
MAINTENANCE ................................................................................................................. 43-49
AEROBELL168 PREVENTIVE MAINTENANCE SCHEDULE ............................................ 50-51
TOOLS REQUIRED TO DISASSEMBLE AEROBELL168 ................................................. 52-53
DISASSEMBLY PROCEDURE (15MM BELL CUP AND SHAPING AIR RING .................. 54-61
DISASSEMBLY PROCEDURE (30MM BELL CUP AND SHAPING AIR RING .................. 62-67
DISASSEMBLY PROCEDURE (65MM BELL CUP AND SHAPING AIR RING .................. 68-73
DISASSEMBLY PROCEDURE FOR REMAINDER OF AEROBELL168 ) .......................... 74-79
DISASSEMBLY PROCEDURE FOR ROBOT/MACHINE MOUNT KITS) ........................... 80-90
PARTS: 91-110
PARTS IDENTIFICATIONS.............................................................................................. 91-106
RECOMMENDED SPARE PARTS……………………………………………………………107-110
WARRANTY POLICIES: 111
LIMITED WARRANTY........................................................................................................... 111
PAGE
LN-9270-12.3
Aerobell 168 - Safety
SAFETY
SAFETY PRECAUTIONS
Before operating, maintaining or servicing any
Ransburg electrostatic coating system, read and
understand all of the technical and safety literature
for your Ransburg products. This manual contains
information that is important for you to know and
understand. This information relates to USER
SAFETY and PREVENTING EQUIPMENT PROBLEMS. To help you recognize this information, we
use the following symbols. Please pay particular
attention to these sections.
WARNING! states information to alert you to a
situation that might cause serious injury if instructions are not followed.
CAUTION! states information that tells how to
prevent damage to equipment or how to avoid a
situation that might cause minor injury.
NOTE is information relevant to the procedure
in progress.
While this manual lists standard specifications and
service procedures, some minor deviations may be
found between this literature and your equipment.
Differences in local codes and plant requirements,
material delivery requirements, etc., make such
variations inevitable. Compare this manual with
your system installation drawings and appropriate
Ransburg equipment manuals to reconcile such
differences.
The user MUST read and be familiar with the
Safety Section in this manual and the
Ransburg safety literature therein identified.
This manual MUST be read and thoroughly
understood by ALL personnel who operate,
clean or maintain this equipment! Special care
should be taken to ensure that the WARNINGS
and safety requirements for operating and servicing the equipment are followed. The user
should be aware of and adhere to ALL local
building and fire codes and ordinances as well
as NFPA-33 SAFETY STANDARD, LATEST
EDITION, prior to installing, operating, and/or
servicing this equipment.
The hazards shown on the following pages
may occur during the normal use of this
equipment. Please read the hazard chart beginning on page 2.
!
!
W A R N I N G
W A R N I N G
Careful study and continued use of this manual will
provide a better understanding of the equipment
and process, resulting in more efficient operation,
longer trouble-free service and faster, easier troubleshooting. If you do not have the manuals and
safety literature for your Ransburg system, contact
your local Ransburg representative or Ransburg
.
1 LN-9270-12.3
Aerobell 168 - Safety
AREA
Tells where haz-
HAZARD
Tells what the hazard is.
ards may occur.
Spray Area Fire Hazard
Improper or inadequate operation and maintenance procedures will cause a fire hazard.
Protection against inadvertent
arcing that is capable of causing
fire or explosion is lost if any
safety interlocks are disabled
during operation. Frequent Power Supply or Controller shutdown indicates a problem in the
system requiring correction.
SAFEGUARDS
Tells how to avoid the hazard.
Fire extinguishing equipment must be present in
the spray area and tested periodically.
Spray areas must be kept clean to prevent the accumulation of combustible residues.
Smoking must never be allowed in the spray area.
The high voltage supplied to the atomizer must be
turned off prior to cleaning, flushing or maintenance.
When using solvents for cleaning:
• Those used for equipment flushing should
have flash points equal to or higher than those
of the coating material.
• Those used for general cleaning must have
flash points above 100°F (37.8°C).
Spray booth ventilation must be kept at the rates
required by NFPA-33, OSHA, country, and local
codes. In addition, ventilation must be maintained during cleaning operations using flammable
or combustible solvents.
Electrostatic arcing must be prevented. Safe
sparking distance must be maintained between the
parts being coated and the applicator. A distance
of 1 inch for every 10KV of output voltage is required at all times.
Test only in areas free of combustible material.
Testing may require high voltage to be on, but only
as instructed.
Non-factory replacement parts or unauthorized
equipment modifications may cause fire or injury.
If used, the key switch bypass is intended for use
only during setup operations. Production should
never be done with safety interlocks disabled.
Never use equipment intended for use in waterborne installations to spray solvent based materials.
The paint process and equipment should be set up
and operated in accordance with NFPA-33, NEC,
OSHA, local, country, and European Health and
Safety Norms.
LN-9270-12.3 2
Aerobell 168 - Safety
AREA
Tells where haz-
HAZARD
Tells what the hazard is.
ards may occur.
Spray Area Explosion Hazard
Improper or inadequate operation and maintenance procedures will cause a fire hazard.
Protection against inadvertent
arcing that is capable of causing
fire or explosion is lost if any
safety interlocks are disabled
during operation.
Frequent Power Supply or Controller shutdown indicates a
problem in the system requiring
correction.
SAFEGUARDS
Tells how to avoid the hazard.
Electrostatic arcing must be prevented. Safe
sparking distance must be maintained between the
parts being coated and the applicator. A distance
of 1 inch for every 10KV of output voltage is required at all times.
Unless specifically approved for use in hazardous
locations, all electrical equipment must be located
outside Class I or II, Division 1 or 2 hazardous
areas, in accordance with NFPA-33.
Test only in areas free of flammable or combustible materials.
The current overload sensitivity (if equipped)
MUST be set as described in the corresponding
section of the equipment manual. Protection
against inadvertent arcing that is capable of
causing fire or explosion is lost if the current overload sensitivity is not properly set. Frequent
power supply shutdown indicates a problem in the
system which requires correction.
General Use and
Maintenance
Improper operation or maintenance may create a hazard.
Personnel must be properly
trained in the use of this equipment.
Always turn the control panel power off prior to
flushing, cleaning, or working on spray system
equipment.
Before turning high voltage on, make sure no objects are within the safe sparking distance.
Ensure that the control panel is interlocked with the
ventilation system and conveyor in accordance
with NFPA-33, EN 50176.
Have fire extinguishing equipment readily available
and tested periodically.
Personnel must be given training in accordance
with the requirements of NFPA-33, EN 60079-0.
Instructions and safety precautions must be read
and understood prior to using this equipment.
Comply with appropriate local, state, and national
codes governing ventilation, fire protection, operation maintenance, and housekeeping. Reference
OSHA, NFPA-33, EN Norms and your insurance
company requirements.
3 LN-9270-12.3
Aerobell 168 - Safety
AREA
Tells where hazards may occur.
Spray Area / High
Voltage Equipment
HAZARD
Tells what the hazard is.
Electrical Discharge
There is a high voltage device
that can induce an electrical
charge on ungrounded objects
which is capable of igniting coating materials.
Inadequate grounding will cause
a spark hazard. A spark can
ignite many coating materials
and cause a fire or explosion.
SAFEGUARDS
Tells how to avoid the hazard.
Parts being sprayed and operators in the spray
area must be properly grounded.
Parts being sprayed must be supported on conveyors or hangers that are properly grounded. The
resistance between the part and earth ground must
not exceed 1 meg ohm. (Refer to NFPA-33.)
Operators must be grounded. Rubber soled insulating shoes should not be worn. Grounding straps
on wrists or legs may be used to assure adequate
ground contact.
Operators must not be wearing or carrying any
ungrounded metal objects.
When using an electrostatic handgun, operators
must assure contact with the handle of the applicator via conductive gloves or gloves with the palm
section cut out.
NOTE: REFER TO NFPA-33 OR SPECIFIC
COUNTRY SAFETY CODES REGARDING
PROPER OPERATOR GROUNDING.
All electrically conductive objects in the spray area,
with the exception of those objects required by the
process to be at high voltage, must be grounded.
Grounded conductive flooring must be provided in
the spray area.
Always turn off the power supply prior to flushing,
cleaning, or working on spray system equipment.
Unless specifically approved for use in hazardous
locations, all electrical equipment must be located
outside Class I or II, Division 1 or 2 hazardous
areas, in accordance with NFPA-33.
LN-9270-12.3 4
Aerobell 168 - Safety
AREA
Tells where hazards may occur.
Electrical
Equipment
HAZARD
Tells what the hazard is.
Electrical Discharge
High voltage equipment is utilized in the process. Arcing in
the vicinity of flammable or
combustible materials may occur. Personnel are exposed to
high voltage during operation
and maintenance.
Protection against inadvertent
arcing that may cause a fire or
explosion is lost if safety circuits
are disabled during operation.
Frequent power supply shutdown indicates a problem in the
system which requires correction.
An electrical arc can ignite coating materials and cause a fire or
explosion.
SAFEGUARDS
Tells how to avoid the hazard.
Unless specifically approved for use in hazardous
locations, the power supply, control cabinet, and all
other electrical equipment must be located outside
Class I or II, Division 1 and 2 hazardous areas in
accordance with NFPA-33 and EN 50176.
Turn the power supply OFF before working on the
equipment.
Test only in areas free of flammable or combustible material.
Testing may require high voltage to be on, but only
as instructed.
Production should never be done with the safety
circuits disabled.
Before turning the high voltage on, make sure no
objects are within the sparking distance.
Toxic Substances
Chemical Hazard
Certain materials may be harmful if inhaled, or if there is contact with the skin.
Follow the requirements of the Material Safety
Data Sheet supplied by coating material manufacturer.
Adequate exhaust must be provided to keep the
air free of accumulations of toxic materials.
Use a mask or respirator whenever there is a
chance of inhaling sprayed materials. The mask
must be compatible with the material being
sprayed and its concentration. Equipment must be
as prescribed by an industrial hygienist or safety
expert, and be NIOSH approved.
5 LN-9270-12.3
Aerobell 168 - Safety
AREA
Tells where haz-
HAZARD
Tells what the hazard is.
ards may occur.
Spray Area Explosion Hazard—
Incompatible Materials
Halogenated hydrocarbon solvents for example: methylene
chloride and 1,1,1,Trichloroethane are not chemically compatible with the aluminum that might be used in many
system components. The chemical reaction caused by these
solvents reacting with aluminum
can become violent and lead to
an equipment explosion.
SAFEGUARDS
Tells how to avoid the hazard.
Aluminum is widely used in other spray application
equipment - such as material pumps, regulators,
triggering valves, etc. Halogenated hydrocarbon
solvents must never be used with aluminum equipment during spraying, flushing, or cleaning. Read
the label or data sheet for the material you intend
to spray. If in doubt as to whether or not a coating
or cleaning material is compatible, contact your
coating supplier. Any other type of solvent may be
used with aluminum equipment.
Mechanical
Hazard
Mechanical Hazard
The bell atomizer can rotate at
speeds up to 60,000 rpm. At
these speeds, the edge of the
applicator can easily cut into
skin, loose articles of clothing
can also be caught by the rotating bell.
Personnel must stay clear of the bell whenever it is
rotating.
Before touching the bell, the turbine air must be
shut off.
If the bell has been rotating, allow at least two
minutes for it to come to a complete stop before
touching it.
LN-9270-12.3 6
Aerobell 168 - Introduction
N O T E S
7 LN-9270-12.3
INTRODUCTION
Aerobell 168 - Introduction
GENERAL DESCRIPTION
The Ransburg Aerobell 168 is a high speed
bell type atomizer for electrostatic applications
of conventional and high solids coating
materials. It is available in several configurations. Contact your Ransburg representative
for assistance in atomizer bell selection.
The Aerobell 168 turbine assembly incorporates precision air type bearings for extended
turbine life.
FEATURES
Features which make the Aerobell 168 advantageous for use in rotary atomizer electrostatic
applications include:
•
Fast color change due to center
feed fluid delivery and integral air
brake
Bell cups are electroless nickel
coated Aluminum
•
Proven long life air bearing
spindle
•
Speed control: This unit has
flexibility in speed sensing
capability. Both magnetic and
light sensing for speed reading
and control can be utilized
•
Internal and external bell cup
wash capability
•
Lightweight
•
Sleek configuration to facilitate
cleaning of the exterior
•
Braking air capability
•
Field repairable turbine assembly
after the warranty period
•
Machine mountable
•
Non-hollow wrist robot mountable
•
15mm dual shape air configuration
for optimum pattern control
•
30mm dual shape air configuration
for optimum pattern control
•
65mm Mono Flex and Dual Flex
shaping air configuration for
optimum pattern control
•
15mm Bell Cup is Titanium
•
30 and 65mm bell cups available.
Figure 1: Aerobell 168
LN-9270-12.3 8
Aerobell 168 - Introduction
OPERATING CHARACTERISTICS AND SPECIFICATIONS
Weight
Atomizer (Post Mount 65mm):
Atomizer (Robot Mount /Valves/65mm):
Voltage
Maximum Operating Voltage:
Maximum Operating Current:
Turbine
Recommended Turbine Speed:
Turbine Type:
Speed Readout Pickup:
Paint
Flow Rate:
Normal Supply Pressure:
Maximum Pressure:
Viscosity:
Viscosity:
Paint Resistivity:
Air Pressure
Microvalve Pilot:
Bearing Air:
Shaping Air:
Brake Air:
Change Time
Rotator Atomizer:
Bell:
Distance:
Target:
Compressed Air Quality
Air Consumption
Bearing Air:
Shaping Air 1:
Shaping Air 2:
Turbine
Bell Cups
15mm:
30mm:
65mm:
2.7 kg (6 lbs.)
4.4 kg (9.7 lbs.)
100 kV
200 uA
15 to 60 Krpm
Impulse – Rear Exhaust
Magnetic of Light Source (2 Pulse/Rev.)
50-500 cm3/min max. (depending on paint)
6 - 8 bar (90 psi - 120 psi)
10 bar (150 psi)
20 to 40 Seconds – Ford Cup # 4
20 to 45 Seconds – AFNOR Cup #4
>1 MOhm.cm
4.9 bar (Min.) – 10 bar (Max.) (75 – 150 psi)
5.5 bar (Min.) – 7 bar (Max.) (80 – 100 psi)
7 bar (Max.) (100 psi Max.)
4 bar (Min.) – 7 bar (Max.) (60 – 100 psi)
Less than 5 minutes
Less than 5 minutes
152 – 305mm (5 – 12 inches)
See Filter Section
57 – 85 slpm (2 – 3 scfm)
75 to 600 NI/min (2.65 – 21.2 scfm)
75 to 600 NI/min (2.65 – 21.2 scfm)
See Charts
100 cc/min. (max.)
300cc/min. (Max.)
500 cc/min. (Max.)
9 LN-9270-12.3
Aerobell 168 - Introduction
OPERATING CHARACTERISTICS AND SPECIFICATIONS
LN-9270-12.3 10
Aerobell 168 - Introduction
OPERATING CHARACTERISTICS AND SPECIFICATIONS
20.0
22.0
24.0
65mm 100 cc/min Load
65mm 200 cc/min load
65mm 300 cc/min Load
65mm 400 cc/min Load
65mm 500 cc/min Load
Air Consumption (scfm)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
Aerobell 168
Speed (rpm)
Air Consumption vs Speed (Loaded)
30,000 40,000 50,000 60,000
700
600
500
400
300
200
Air Consumption (slpm)
100
11 LN-9270-12.3
0
Aerobell 168 - Introduction
OPERATING CHARACTERISTICS AND SPECIFICATIONS
65mm 100 cc/min
65mm 200 cc/min
65mm 300 cc/min
65mm 400 cc/min.
65mm 500 cc/min
Pressure (Bars)
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
Aerobell 168
Air Pressure vs Speed (Loaded)
120
100
80
60
40
Pressure (psi)
LN-9270-12.3 12
20
Speed (rpm)
30,000 40,000 50,000 60,000
0
Aerobell 168 - Introduction
OPERATING CHARACTERISTICS AND SPECIFICATIONS
11.0
12.0
13.0
14.0
30mm 100 cc/min Load
30mm 200 cc/min Load
30mm 300 cc/min Load
Air Consumption (scfm)
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
Aerobell 168
Speed (rpm)
Air Consumption vs Speed (Loaded)
30,000 40,000 50,000 60,000
400
350
300
250
200
150
100
Air Consumption (slpm)
50
13 LN-9270-12.3
0
Aerobell 168 - Introduction
OPERATING CHARACTERISTICS AND SPECIFICATIONS
30mm 100 cc/min
Load
30mm 200 cc/min
Load
30mm 300 cc/min
Load
Pressure (Bars)
Aerobell 168
4
3.5
3
2.5
2
1.5
1
0.5
Air Pressure vs Speed (Loaded)
0
Speed (rpm)
30,000 40,000 50,000 60,000
50
45
40
35
30
25
20
Pressure (psi)
15
10
5
0
LN-9270-12.3 14
Aerobell 168 - Introduction
DIMENSIONAL CHARACTERISTICS
30MM FANUC ROBOT MOUNT — 60 DEGREES
15MM FANUC ROBOT MOUNT — 60 DEGREES
15 LN-9270-12.3
Aerobell 168 - Introduction
DIMENSIONAL CHARACTERISTICS
3.72 [94.4]
1.00 [25.4]
6.18 [157.0]
2.68 [68.2] CG
.21 [5.2] CG
Ø4.50 [114.2]
5.51 [140.1]
30MM POST MOUNT
15MM POST MOUNT
5.20 [132.0]
Ø.75 [19.0]
LN-9270-12.3 16
Aerobell 168 - Introduction
30 MM MACHINE MOUNT— 60 DEGREES
15 MM MACHINE MOUNT— 60 DEGREES
17 LN-9270-12.3
CG
3.18 [80.7]
CG
7.58 [192.6]
Aerobell 168 - Introduction
8.67 [220.3]
14.98 [380.5]
6.82 [173.2]
9.07 [230.4]
Ø.75 [19.0]
30 MM MACHINE MOUNT - STRAIGHT
15 MM MACHINE MOUNT - STRAIGHT
4.94 [125.6]
Ø4.50 [114.2]
LN-9270-12.3 18
Aerobell 168 - Introduction
DIMENSIONAL CHARACTERISTICS
65MM ROBOT MOUNT FANUC PAINT MATE
19 LN-9270-12.3
Aerobell 168 - Introduction
DIMENSIONAL CHARACTERISTICS
LN-9270-12.3 20
Aerobell 168 - Introduction
DIMENSIONAL CHARACTERISTICS
65MM MACHINE MOUNT— 60 DEGREES
21 LN-9270-12.3
Aerobell 168 - Introduction
DIMENSIONAL CHARACTERISTICS
65MM MACHINE MOUNT—STRAIGHT
LN-9270-12.3 22
Aerobell 168 - Introduction
IMPORTANT NUMBERS
Record these numbers in a log book for future reference. The last digits of the Atomizer serial
number are also the Turbine serial number.
TURBINE SERIAL NUMBER
(ON SPINDEL BARREL)
SERIAL NUMBER LOCATED
ON BACK FACE OF CUP
BELL CUP PART NUMBER
(LOCATED ON BACKFACE OF
CUP (AXXXXX))
23 LN-9270-12.3
Aerobell 168 - Introduction
NOTES
LN-9270-12.3 24
Aerobell 168 - Introduction
HOSE SPECIFICATIONS
REAR MANIFOLD PORT CONNECTIONS
25 LN-9270-12.3
Aerobell 168 - Introduction
HOSE SPECIFICATIONS
Function Hose Characteristics
Paint Supply @ Applicator 1/4” O.D. Tube Fitting
Paint Supply @Valve Manifold 6mm I.D. x 8mm O.D. PFA (.236” I.D. x 5/16” O.D.)
Turbine Supply @ Applicator 6mm I.D. x 8mm O.D. Nylon (.236” I.D, x 5/16” O.D.)
Turbine Braking Air Supply @ Applicator 6mm I.D. x 8mm O.D. Nylon (.236” I.D, x 5/16” O.D.)
Bearing Air Supply @ Applicator 6mm I.D. x 8mm O.D. Nylon (.236” I.D, x 5/16” O.D.)
Bearing Air Return @ Applicator 2.7mm I.D. x .4mm O.D. Nylon (.107 “ I.D. x 5/32” O.D.)
Shaping Air 1 @ Applicator 6mm I.D. x 8mm O.D. Nylon (.236” I.D, x 5/16” O.D.)
Sharping Air 2 @ Applicator 6mm I.D. x 8mm O.D. Nylon (.236” I.D, x 5/16” O.D.)
Interior and Bell Cup Exterior Rinsing Air/
Solvent
Dump @ Valve Manifold 6mm I.D. x 8mm O.D. PFA (.236” I.D. x 5/16” O.D.)
Pilot for all Microvalves 2.7mm I.D. x .4mm I.D. Nylon (.107 “ I.D. x 5/32” O.D.)
Interior and Bell Cup Exterior Rinsing Air/
Solvent Supply @ Valve Manifold
♦
!
Arcing/fire hazard exist if ungrounded
1/16” I.D. x 3/32” O.D. PFA
6mm I.D. x 8mm O.D. PFA (.236” I.D. x 5/16” O.D.)
W A R N I N G
metal connections (air or fluid) are used
in the spray area. Use plastic nonconductive connections, or ensure metal connections are at ground potential.
PFA* hoses must never be replaced with
Nylon hoses. Only Polyamide Nylon hoses
can be used for air connections. Polyurethane hoses are prohibited.
* PFA = Ultra Pure Polytetrafluoroethylene
LN-9270-12.3 26
Aerobell 168 - Installation
INSTALLATION
GENERAL INFORMATION
This information is intended ONLY to indicate
the general installation parameters of this
product and, where applicable, its working
relationship to other Ransburg system components in typical use.
Each installation is unique and should be
directed by an authorized Ransburg representative or conducted using the Ransburg
installation drawings provided for your particular installation.
Risk of arcing/fire hazard. The Aerobell 168
must be located a safe distance from the object
to be sprayed, as well as all other grounded
objects. The safe distance is at least 1– inch per
10kV of electrostatic voltage. Example: If the
Aerobell 168 is used with 100kV applied voltage, it must be at least 10-inches from the object to prevent arcing.
The Aerobell 168 shipping container includes
the basic atomizer assembly with bell and manifold. Also required with the system are 2 (or
more) RPM-419 wrenches (ordered separately).
The RPM-419 wrenches are used to remove the
shaping air cap and air ring, and the bell cup
(wrenches not required during installation as the
cap, ring, and bell are mounted in place).
Mount the Aerobell 168 securely to a stationary or reciprocating fixture with the 3/4-inch
(19MM) diameter stud provided.
!
W A R N I N G
AIR FILTER
INSTALLATIONINSTALLATION
The following guidelines must be observed
when installing air filters for the Aerobell 168
system (see "Air Filtration Requirements
Chart" for additional information).
1. Use only recommended pre-filters and
bearing air filters as shown in "Recommended
Air Filtration Requirements" in this section.
Additional system air filtration (i.e., refrigerated
air dryer) may also be used if desired.
2. Use one bearing air filter per Aerobell.
3. Mount the bearing air filter as close as possible to the Aerobell 168 (do not mount further
than 30 feet (9M) away).
4. Where possible, the pre-filter(s) and bearing air filter(s) should be mounted where they
can be easily seen, so the user will see when
maintenance is required.
5. Standard black iron or galvanized piping
may be used prior to the HAF-503 or HAF-508
pre-filters only. All piping after the pre-filter
should be brass, stainless steel, aluminum, or
hose (poly, nylon, nyliner, etc.).
6. Do not use PTFE tape, pipe dope, or other
thread sealant downstream of the bearing air
filter. Loose flakes of PTFE tape or other
sealant can break loose and plug the very fine
air holes in the turbine bearings.
7. Use clear see-through air tubing between
the bearing air filter and bearing air fitting to
clearly indicate to the user if oil or moisture
contamination is getting past the filter.
8. If air heaters are used in the system (to mini
-mize the effect of excessively humid conditions), and the heated air will exceed 120oF,
the heaters must be located after all filters to
prevent damage to the filter media.
27 LN-9270-12.3
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