Donaldson Torit RFWP User manual

RF Baghouse Dust Collector
Models RFWP and RFWPH
Installation and Operation Manual
Installation, Operation, and Service Information
Model RFWP Model RFWPH
This manual contains specic precautions related to worker safety. The hazard alert image denotes safety
related instructions and warnings in this manual. DO NOT install, operate, or perform maintenance on this
collector until you have read and understood the instructions, precautions and warnings contained within this
manual.
IOM AD3670201 (ENG)
Revision 4
English
Master Language

Donaldson Company, Inc.
The Safety Alert Symbol indicates a hazardous situation which, if not avoided could
result in death or serious injury. Obey all safety messages following this symbol to
avoid possible injury or death. The possible hazards are explained in the associated
text messages.
NOTICE indicates a potential situation or practice which is not expected to
result in personal injury, but which if not avoided, may result in damage to
equipment.
CAUTION, used with the safety alert symbol, indicates a hazardous situation
which, if not avoided, could result in minor or moderate injury.
This manual has been supplied to assist with the installation, operation and maintenance for
the collector purchased. Please read the manual before installing, operating, or performing
maintenance on the collector as it contains specic precautions for worker safety. It is the
owner’s responsibility to ensure that this manual is available for use by installers, operators and
maintenance personnel that will be working with this collector. This manual is the property of the
owner and should be left with the collector when installation has been completed. DO NOT operate
this collector until you have read and understood the instructions and warnings located in the
installation and operation manual.
For additional copies of this manual, contact Donaldson Torit.
2
IMPORTANT NOTES

Magnehelic®and Photohelic®are registered trademarks of Dwyer Instruments, Inc.
RF Baghouse, Models RFWP and RFWPH
i
Contents
IMPORTANT NOTES......................................................................................................................................................................2
Safety Communication .......................................................................................................................................................1
Description..........................................................................................................................................................................3
Purpose and Intended Use ................................................................................................................................................3
RFWP Involute Operation...................................................................................................................................................4
RFWPH High Inlet Operation .............................................................................................................................................4
Inspection on Arrival ...........................................................................................................................................................5
Installation Codes and Procedures.....................................................................................................................................5
Installation ..........................................................................................................................................................................5
Standard Equipment...........................................................................................................................................................7
Leg Installation ............................................................................................................................................................9
Provisional Anchor Bolt Recommendations ..............................................................................................................10
Tubesheet Assembly .................................................................................................................................................10
Hopper Assembly ......................................................................................................................................................12
Involute Inlet Assembly .............................................................................................................................................15
Dirty Air Plenum Assembly for Involute Inlet .............................................................................................................18
Dirty Air Plenum with High Body Inlet Assembly ......................................................................................................23
Clean Air Plenum Assembly ......................................................................................................................................28
Cleaning System Operation..............................................................................................................................................31
Cleaning Mechanism Installation...............................................................................................................................32
Roof Installation.........................................................................................................................................................34
Collector Body Assembly for Lower Crane Capacity.................................................................................................40
Ladder/Platform Installation.......................................................................................................................................43
Cleaning System Assembly and Adjustment .............................................................................................................44
Electrical Wiring.........................................................................................................................................................45
Solid-State Timer Installation.....................................................................................................................................47
Solenoid Connection .................................................................................................................................................47
Timer and Solenoid Specications ............................................................................................................................47
Felt Bag and Cage with Boltsafe™ Hardware Filter Installation................................................................................50
Pleated Bag with Boltsafe™ Hardware Filter Installation ..........................................................................................50
Felt Snap-In Bag Filter Installation ............................................................................................................................50
Preliminary Start-Up Check..............................................................................................................................................52
Maintenance Information..................................................................................................................................................54
Inlet Bafe Assembly Replacement...........................................................................................................................55
Filter Removal and Installation ..................................................................................................................................55
Optional Equipment..........................................................................................................................................................59
Magnehelic®Gauge .................................................................................................................................................59
Photohelic®Gauge ..................................................................................................................................................60
Explosion Vent...........................................................................................................................................................62
Troubleshooting................................................................................................................................................................63
Product Information ..........................................................................................................................................................66
Service Notes ...................................................................................................................................................................67
Donaldson Industrial Air Filtration Warranty..............................................................................................................................68

1
Donaldson Company, Inc.
Improper operation of dust collectors and/or dust control systems may contribute to conditions in a work area or
facility which could result in severe personal injury, and product or property damage. All dust collection equipment
should be used only for its intended purpose and should be properly selected and sized for its intended use.
Process owners have important responsibilities relating to identifying and addressing potential hazards in their
processes. When the potential for handling combustible dust exists within a process the process owner should
include combustion hazards in their risk management activities and should comply with applicable codes and
standards related to combustible dust.
Electrical installation must be performed by a qualied electrician.
This equipment is not designed to support site ducts, piping, or electrical services. All ducts, piping, or electrical
services must be adequately supported to prevent injury and/or property damage.
Site selection must account for wind, seismic zone, and other load conditions.
Equipment may reach peak sound pressure levels above 80 dB (A). Noise levels should be considered when
selecting collector location.
Most dusts present safety and health hazards that require precautions. Wear eye, respiratory, head and other
protection equipment suitable for the type of dust.
Some components may be heavier than they appear. Use appropriate lifting methods to avoid personal injury and/or
property damage.
Safety Communication

RF Baghouse, Models RFWP and RFWPH
2
Combustible Dust Hazards
Among other considerations, the current NFPA standards require owners whose processes involve potentially combustible
materials to have a current Dust Hazard Analysis, which can serve as the foundation for their process hazard mitigation strategy.
Mitigation may include but is not limited to:
• Prevention of all ignition sources from entering any dust collection equipment.
• Selection and implementation of re and explosion mitigation, suppression, and isolation strategies appropriate for the
risks in their process.
• Development and use of work practices to maintain safe operating conditions, and to ensure combustible dust does not
accumulate within their plant or process equipment.
Donaldson designs, manufactures, and sells industrial air ltration products for a wide variety of applications. Some applications
may include processes or materials with inherent re and explosion hazards. Donaldson is neither an expert nor a certied
consultant in re, spark, or explosion detection, suppression, or control. Donaldson does not provide engineering consulting
services related to process or dust hazard analyses, or code and standard compliance. Complying with applicable codes and
standards and managing the risks associated with the process or materials remains the responsibility of the process owner/
operator. Donaldson may provide referrals to consultants, suppliers of equipment or services related to the detection and/
or mitigation of sparks, res and/or explosions, but Donaldson does not assume responsibility for any such referrals, nor does
Donaldson assume any liability for the tness of a mitigation strategy or product for a particular installation or application. The
process owner’s nal selection of dust collectors and risk mitigation strategies should be based on the outcome of a Dust Hazard /
Process Hazard Analysis performed by the process owner. Although early engagement of a dust collector supplier provides helpful
insights on the availability and features of various products, process owners should consult with a combustible dust expert and/or a
process safety expert before making actual product and mitigation strategy selections.
Donaldson recommends that all industrial air ltration system designs be reviewed and approved by an expert consultant who is
responsible for the integrity of the system design and compliance with applicable codes and standards. It is the process owner’s
responsibility to understand the risks in their process and mitigate those risks in accordance with all applicable laws, regulations
and standards, including those published by the NFPA. Donaldson also recommends that proper maintenance and housekeeping
procedures and work practices be evaluated, developed, and followed to maintain any industrial air ltration products in safe
operating condition.
Many factors beyond the control of Donaldson can affect the use and performance of Donaldson products in a particular
application, including the conditions under which the product is used. Since these factors are uniquely within the user’s knowledge
and control, it is essential the user evaluate the Donaldson products to determine whether the product is t for the particular
purpose and suitable for the user’s application. All products, product specications, and data (airow, capacity, dimensions, or
availability) are subject to change without notice, and may vary by region or country.

3
Donaldson Company, Inc.
Description
The RFWP Baghouse is a continuous duty dust collector with
bag-style lters designed to handle up to
141,000 cfm depending on the application and dust type.
Continuous duty means the lters can be pulse cleaned on-
line without interrupting airow through the collector. A timer
energizes the cleaning system to ensure the bag-style lters
are cleaned at least once every four minutes.
The cylindrical collectors housing design features a sectional
bolt together construction in standard sizes from 570 to 905
lter bags with either 10 or 12-ft long bag-style lters. The
collector housing design can include an involute, scroll-type
inlet with an internal deection bafe or a high body inlet.
The involute inlet removes heavy materials before they
reach the bags, eliminating the need for a separate cyclone
precleaner. The high body inlet is ideal for lighter density
materials and may offer better abrasion resistance.
The RFWP features a walk-in clean-air plenum, allowing lter
bag service from inside the clean air plenum.
The RFWP Baghouse collector is common in the woodworking
and grain industries where it effectively handles high-volume,
high dust-load applications. Additional applications include
cement, chemical, coal, and food processing applications like
sugar and other moisture-sensitive materials.
These RFWPs are typically used in applications over 37,000
cfm.
Sizes are available for applications with any of the following
conditions or requirements:
• Heavy dust load
• No compressed air available
• A round collector required for sanitary reasons
• High pressure or vacuum requirement
• A requirement for a single discharge hopper
Operations involving higher temperatures, humidity, or air
stream chemistry may require special attention. These
conditions can usually be supported with custom design
modications to the RFWP Baghouse collectors.
Purpose and Intended Use
Misuse or modication may result
in severe personal injury and/or
property damage.
Do not misuse or modify.

RF Baghouse, Models RFWP and RFWPH
4
RFWP Involute Operation
During normal operation, dust-laden air enters the dirty-air
inlet. The involute scroll-style inlet develops a cyclonic airow
causing heavier particulate to drop directly into the hopper.
The air continues through an internal ow straightener that
evenly distributes the dust-laden air within the collector cross-
section and around the lter bags. After entering the collector
the light dust collects on the outside surface of each lter bag
forming a dust cake. Clean, ltered air passes through the
lter bags to the clean-air plenum and discharges through the
clean-air outlet.
RFWPH High Inlet Operation
High body inlets are necessary for certain applications
including those with lighter density dusts or highly abrasive
materials when the collector will run 24 hours a day, 7 days
per week. In these cases as the air enters the dirty air plenum
it passes through a set of self-sacricing air distribution bafes
that reduce the inertia of the abrasive materials causing much
of the dust to fall out of the air stream and into the hopper.
The 3/16-in plate heavy duty bafes offer long-term abrasion
resistance. Individual bafes are easily replaced through an
access door on the inlet housing.
filter
access door
flow straightener
baffles
filter bags
hopper
Model RFWP Model RFWPH
dirty-air inlet
involute
scroll inlet
clean-air outlet
filter
access door
filter bags
hopper
dirty-air inlet
clean-air outlet
air
distribution
baffles
Collector Operation

5
Donaldson Company, Inc.
Inspection on Arrival
1. Inspect collector upon delivery.
2. Report any damage to the delivery carrier.
3. Request a written inspection report from the Claims
Inspector to substantiate any damage claim.
4. File claims with the delivery carrier.
5. Compare collector received with description of product
ordered.
6. Report incomplete shipments to the delivery carrier and
your Donaldson Torit representative.
7. Remove crates and shipping straps. Remove loose
components and accessory packages before lifting
collector from truck.
8. Check for hardware that may have loosened during
shipping.
9. Use caution removing temporary covers.
Installation Codes and Procedures
Codes may regulate recirculating
ltered air in your facility. Consult
with the appropriate authorities
having jurisdiction to ensure compliance with all
national and local codes regarding recirculating
ltered air.
Safe and efcient operation of the collector depends on proper
installation.
Authorities with jurisdiction should be consulted before
installing to verify local codes and installation procedures. In
the absence of such codes, install collector according to the
National Electric Code, NFPA No. 70-latest edition and NFPA
91 (NFPA 654 if combustible dust is present).
A qualied installation and service agent must complete
installation and service of this equipment.
All shipping materials, including shipping covers, must
be removed from the collector prior to or during collector
installation.
Failure to remove shipping materials
from the collector will compromise
collector performance.
Inspect collector to ensure all hardware is properly installed
and tight prior to operating collector.
Read and follow all instructions and precautionary statements
in this manual prior to assembly in order to achieve expected
assembly results.
Installation
Use proper equipment and adopt
all safety precautions needed for
servicing equipment.
Electrical service or maintenance work must be
performed by a qualied electrician and comply
with all applicable national and local codes.
Turn power off and lock out electrical
power sources before performing service or
maintenance work.
Do not install in classied hazardous
atmospheres without an enclosure rated for the
application.
Site selection must account for wind, seismic
zone, and other load conditions when selecting
the location for collectors.
Codes may regulate acceptable locations for
installing dust collectors. Consult with the
appropriate authorities having jurisdiction to
ensure compliance with all national and local
codes regarding mist collector installation.
Collectors must be anchored in a manner
consistent with local code requirements. Anchors
must be sufcient to support dead, live, seismic,
and other anticipated loads.
Consult a qualied engineer for nal selection of
anchorage.
The collector is suitable for either indoor or outdoor
installations. Reference the Rating and Specication
Information.

RF Baghouse, Models RFWP and RFWPH
6
Collector Location
Donaldson Torit equipment is not
designed to support site installed
ducts, interconnecting piping, or
electrical services. All ducts, piping, or electrical
services must be adequately supported to
prevent severe personal injury and/or property
damage.
When hazardous conditions or materials are
present, consult with local authorities for the
proper location of the collector.
Dust collection equipment may reach peak sound
pressure levels above 80 dB (A). Noise levels
should be considered when selecting collector
location.
Locate the collector to ensure easy access to electrical and
compressed air connections, to simplify solids collection
container handling and routine maintenance, and to ensure the
straightest inlet and outlet ducts.
Foundations or Support Framing
Prepare the foundation or support framing in the selected
location. Foundation or support framing must comply with local
code requirements and may require engineering.
Foundation and support framing must be capable of supporting
dead, live, wind, seismic and other applicable loads. Consult
a qualied engineer for nal selection of foundation or support
framing.
Site Selection
This collector can be located on a foundation or structural
framing.
Provide clearance from heat sources and avoid any
interference with utilities when selecting the location.
Ensure the inlet has at least ve diameters of straight duct
prior to the collector inlet including a transition to the full
inlet dimensions. Inlet transition should have a taper with a
maximum of a 90-degree included angle.
Consider the effects of condensation caused by temperature
difference between the process airstream and outdoor
temperatures.
Consider forklift access for solid collection container removal.
Lifting Information
Failure to lift the collector correctly
can result in severe personal
injury and/or property damage.
Use appropriate lifting equipment and adopt
all safety precautions needed for moving and
handling the equipment.
A crane or forklift is recommended for unloading,
assembly, and installation of the collector.
Location must be clear of all obstructions, such
as utility lines or roof overhang.
Use all lifting points provided.
Use clevis connectors, not hooks, on lifting slings.
Use spreader bars to prevent damage to collector’s casing.
Check the Specication Control drawing for weight and
dimensions of the collector and components to ensure
adequate crane capacity.
Allow only qualied crane or forklift operators to lift the
equipment.
Refer to applicable OSHA regulations and local codes when
using cranes, forklifts, and other lifting equipment.
Lift collector and accessories separately and assemble after
collector is in place.
Use drift pins to align holes in section anges during assembly.

7
Donaldson Company, Inc.
Standard Equipment
After removing any accessory equipment that may have been
stored inside the collector, follow the precautions below during
installation:
Take appropriate precautions to
avoid injury (pinching) during leg
structure assembly or handling.
Take appropriate precautions to prevent tripping
or falling when working on or around the leg
structure.
Follow all assembly instructions
and notes and cautions to achieve
expected assembly results. Assembling the
structure in the wrong sequence or without
following proper procedure can result in
structural failure and improper operation.
Follow the provided bolting instructions.
Using incorrect or insufcient fasteners can
compromise structural integrity. Improper
tightening of bolt hardware may compromise
structural integrity.
Do not assemble the collector in the wrong
sequence or using the incorrect components.
Use only provided lifting lugs in the prescribed
fashion and do not lift more weight than what is
specied.
Lift rings and sections only when the load is
balanced.

RF Baghouse, Models RFWP and RFWPH
8
Typical Hardware
Bolt, Grade 5
2-Hardened Washers per ASTM F436
Lock Washer
Nut, Grade 5
Flanged Nut, Case Hardened
Flanged Bolt, Case Hardened
Hardware Size
Size Assembly Recommended Bolt
Torque (ft/lbs)
3/8-in Ladder
Platform 25-30
1/2-in Hopper
Body(ies)
Involute Inlet
High Inlet
Roof
55-75
5/8-in Tube Sheet 110-150
3/4-in Leg Structure 200-260
Grade 5 Hardware
Flanged Hardware
Hardware
roof
clean-air
plenum
dirty-air
plenum
clean-air
outlet
tube sheet
(sandwiched)
involute
inlet
optional
ladder
optional
platform
leg
frame
optional
explosion
vent
hopper outlet
hopper
Typical Installation Components, Model RFWP
shown
Typical Installation

9
Donaldson Company, Inc.
I-beam frame
leg
back-to-back
angle iron
cross-bracing
Anchors must comply with local
code requirements and must be
capable of supporting dead, live,
wind, seismic, and other applicable loads.
Anchor sizes shown are provisional, as nal
anchor sizing will depend on jobsite load
conditions, collector location, foundation/framing
design variables and local codes.
Consult a qualied engineer for nal selection of
suitable anchors.
Leg Installation
Temporary support is required until
all legs and cross-bracing are in
place.
2. Set the legs onto the pre-poured foundation and bolt tight.
Leg Structure Assembly
3. Install all cross-braces spanning the legs using the 3/4-in
supplied hardware.
4. Keep bolts partially tightened until the I-beam perimeter
frame can be set into place.
5. Lay out the I-beam frame at grade level and install
hardware hand tight.
6. Lift the I-beam frame onto the leg structure, ensuring
frame is level and plumb.
7. Tighten all hardware.
Tighten all hardware before
removing crane to prevent personal
injury and/or property damage.
Reference Typical Foundation Anchor and leg assembly
drawing shipped with the collector prior to starting assembly.
1. Prepare the foundation or support framing in the selected
location. Locate and install anchors.

RF Baghouse, Models RFWP and RFWPH
10
Tubesheet Assembly
1. Lay out the panels of the tube sheet with ange-side up
on a level area using stand-offs to avoid ground contact
and to keep the tube sheet surface free from blemishes.
2. Apply sealant to the connecting anges of the tube
sheet prior to aligning bolt holes. Apply sealant around
the inside perimeter within 1/4-in of all ange edges and
around all bolt holes as shown.
3. Bolt the connecting anges together using the provided
5/8-in hardware. Keep the last three vertical bolt holes at
the perimeter free of hardware as shown.
4. Attach the circular bottom connecting plate to tie in all
pieces of the tube sheet as shown. Use the supplied
2½-in length hardware for bolting through the multiple
material thicknesses associated with the bottom
connecting plate.
tube sheet flange
sealant
bolt hole
sealant
1/4-in from
flange edge
flange
edge
vertical
bolt
holes
(no
hardware)
Tube Sheet Flange - Sealant Application
Provisional Anchor Bolt Recommendations
1. Consider Hilti HIT-HY 200 Anchor System or equivalent.
Quantity of anchor bolts should match the number of holes
provided in the base plates.
2. Anchor diameter is typically 1/8 to 1/2-in less than
baseplate hole diameter.
3. Corrosive environment or outdoor installation may require
stainless steel anchors.
Typical Foundation Anchor
Anchor should project a
minimum of 1 3/4-in and
account for nut, washer,
base plate and shims/
grout.
Embedment depth
(suitable for the
physical properties of
the foundation).

11
Donaldson Company, Inc.
bottom connecting
plate no bolt
hardware
tube sheet
top connecting plate
tube sheet center holes standoff (typical)
radial stiffener
Tube Sheet (Upside Down) - Bottom Connecting Plate
5. Turn the tube sheet over to the upright position. Use
stand-offs placed under the radial stiffeners to keep the
tube sheet off of grade as shown. Make certain the tube
sheet is level.
Use appropriate lifting equipment
and procedures when turning the
tube sheet assembly over to prevent severe
personal injury and/or property damage.
6. On the top connecting plate, apply sealant to one side
outside the bolt pattern, inside the bolt pattern, and
around each bolt hole.
7. Set the top connecting plate onto the tube sheet center
and align the holes with the sealant against the tube
sheet. Securely bolt plate and tube sheet together.
Tube Sheet (Upright) Top Connecting Plate

RF Baghouse, Models RFWP and RFWPH
12
Hopper Assembly
1. Mount the upper hopper panel upside down on a at,
clean surface. Use the tube sheet as a xture if there is
no at area to work on. Do not apply sealant between the
hopper panel and the tube sheet.
2. Temporary supports at the ends of each hopper panel
may be required until the upper hopper ring is complete.
upper hopper
assembly
upper hopper
panel
sealant
pattern
hopper mating
flange
Sealant Application
bolt
hole
flange
edge
sealant
1/8-in
from
flange
edge
Upper Hopper Assembly (Upside Down)
3. Before connecting the adjacent hopper panel, apply
sealant to the mating ange within 1/8-in of both ange
edges as shown.
4. Set the next panel and hand-tighten the hardware
(connecting bolts should draw the adjoining anges
together but still allow for some slippage). Repeat steps
until upper hopper assembly is complete.

13
Donaldson Company, Inc.
5. After the upper hopper is assembled, apply sealant to the
top of the upper ange as shown to prepare for the lower
hopper to be set.
6. Lower the lower hopper assembly onto the upper hopper
assembly.
7. Align the hopper access door with a mating seam of the
upper hopper assembly. This will force the hopper outlet
ange’s bolt pattern to straddle the centerline of the
collector.
8. Insert all bolts connecting the lower hopper assembly to
the upper hopper assembly and then tighten. Proceed by
tightening all bolts of the upper hopper assembly.
sealant pattern
upper flange
Sealant Application
bolt hole
upper
hopper
assembly
lower
hopper
assembly
upper
flange
hopper access door
(align door center
with hopper seam)
hopper seam
Hopper Assembly (Upside Down)
9. After hopper assembly is completely bolted and tightened,
undo any bolts connecting it to the tube sheet (if used).
10. Lift the hopper and rotate it to the upright position.
Use caution when lifting/rotating
hopper. Keep tension on all
straps/cables when lifting. Failure
to comply may result in personal injury and/or
property damage.
Water overow drains are required if sprinkler/
re suppression system is installed.

RF Baghouse, Models RFWP and RFWPH
14
11. Attach lifting lugs 90° apart to the top of the hopper.
12. On RF models 570RFWPH and 608RFWP only, align
the arrow indicators inside the hopper feet in the 0°, 90°,
180°, and 270° positions per the conguration drawing.
See illustration below.
13. In this orientation, lower the hopper assembly into the
leg frame. Fasten the hopper assembly securely to the
I-beam frame with the provided 3/4-in hardware.
I-beam
frame
hopper foot
arrow indicator
hopper
assembly
leg
frame
hopper
foot
Arrow Indicator - RF Models: 570RFWPH and 608RFWP
lifting lug
lifting lug
Hopper to Leg Frame Installation
Note: Lifting Lugs Bolt-On Usage - Use the provided bolt-on lifting lugs and grade 5 hardware when moving panels into
position. Position the lugs such that excess swaying will be minimized. When lifting an assembly, use all four lugs
with the backer plates attached. Never lift more than what is recommended in this manual.
RF panel
bolt-on lifting lugs
angle
lug
backer
plate
RF panel
flange
Bolt-On Lifting Lugs

15
Donaldson Company, Inc.
Involute Inlet Assembly
Note: For High Inlet Models, see “Dirty Air Plenum with High
Body Inlet Assembly” section.
1. Place the involute body panels onto a at, clean surface.
If there is no suitable surface, use the tube sheet as a
template. Do NOT apply sealant between tube sheet
and body panels. The 90° body involute inlet should be
reserved and set into position last.
Sealant Application Detail*
sealant
pattern external
flange
bolt
hole
flange
edge sealant
1/8-in
from flange
edge
90 body involute inlet
(installed last)
o
apply sealant
(per Detail*)
apply sealant
(per Detail*)
involute
body
panel
apply sealant
(per Detail*)
Involute Body Panel Assembly
Prior to setting an adjacent panel, apply sealant to all
external anges within 1/8-in from ange edge as shown.
Once the body panels are bolted and joined with the 1/2-
in hardware, apply sealant to the 90° body involute inlet
and set it into place.

RF Baghouse, Models RFWP and RFWPH
16
2. After assembling the perimeter body panel assembly,
install the interior bafes by bolting them to the inlet
assembly.
3. Off to the side, assemble the inner ow straightener ring.
The inner ring panels overlap each other to complete the
ring. Orient all hardware bolting from the outside of the
ring to the inside of the ring to eliminate any interference
in the next step. Lift and then lower the inner ow
straightener ring into the center of the inlet as shown.
inlet assembly
interior baffle
inner flow
straightener ring
90 body
involute inlet
o
Improper installation of internal
bafes and inner ow straightener
ring will compromise structural integrity. Ensure
proper installation of the internal bafes and
inner ow straightener ring.
4. Rotate the inner ow straightener ring until all adjoining
anges make contact. Bolt together and tighten all bolts.
Inner Flow Straightener Ring Installation

17
Donaldson Company, Inc.
5. Apply sealant to the top of the hopper ange as shown
to prepare for the setting of the inlet assembly onto the
hopper ange. Properly attach and lift inlet assembly
following lifting lugs bolt-on usage instructions previously
shown. Lift inlet assembly into position while noting nal
desired orientation.
Lift the involute inlet ring in a
balanced fashion to eliminate any
unnecessary swinging, tipping, or uneven lifting.
Lifting with the (3) lifting lugs on the involute inlet
will result in uneven lifting and cause damage to
the inlet section (fall hazard).
Do not lift the involute inlet section by the
perforated ow straightener bafes.
6. Inspect the orientation of the inlet ensuring the inlet
ange is parallel to the I-beam frame as shown on
the conguration drawing. As the inlet is lowered onto
the hopper, align all holes and bolt tightly with 1/2-in
hardware.
involute inlet
assembly
hopper
assembly
leg frame
sealant
pattern
upper flange
bolt hole
Sealant Application
Involute Inlet Assembly Installation