Dryflo® Machine Mountable Mist
Collectors
MMA and MMB
Installation and Operation Manual
Installation, Operation, and Service Information
This manual is property of the owner. Leave with the collector when set-up and start-up are complete. Donaldson Company reserves the
right to change design and specifications without prior notice.
Illustrations are for reference only as actual product may vary.
This is the safety alert symbol. It is used to alert you to potential personal injury hazards.
Obey all safety messages that follow this symbol to avoid possible injury or death.
English
Master Language
IOM 7236900 (ENG)
Revision 6
Donaldson Company, Inc.
Process owners/operators have important responsibilities relating to combustible hazards.
Process owners/operators must determine whether their process creates combustible dust,
fume, or mist. If combustible dust, fume, or mist is generated, process owners/operators should at a
minimum:
• Comply with all applicable codes and standards. Among other considerations, current NFPA standards
require owners/operators whose processes involve potentially combustible materials to have a current
Hazard Analysis, which can serve as the foundation for their process hazard mitigation strategies.
• Prevent all ignition sources from entering any dust collection equipment.
• Design, select, and implement fire and explosion mitigation, suppression, and isolation strategies that
are appropriate for the risks associated with their application.
• Develop and implement maintenance work practices to maintain a safe operating environment, ensuring
that combustible dust, fume, or mist does not accumulate within the plant.
Donaldson recommends process owners/operators consult with experts to insure each of these
responsibilities are met.
As a manufacturer and supplier of Industrial Filtration Products, Donaldson can assist process owners/
operators in the selection of filtration technologies. However, process owners/operators retain all
responsibility for the suitability of fire and explosion hazard mitigation, suppression, and isolation strategies.
Donaldson assumes no responsibility or liability for the suitability of any fire and/or explosion mitigation
strategy, or any items incorporated into a collector as part of an owner/operators hazard mitigation strategy.
Improper operation of a dust control system may contribute to conditions in the work area or facility that
could result in severe personal injury and product or property damage. Check that all collection equipment is
properly selected and sized for the intended use.
DO NOT operate this equipment until you have read and understand the instruction warnings in the
Installation and Operations Manual. For a replacement manual, contact Donaldson Torit.
This manual contains specific precautionary statements relative to worker safety. Read thoroughly and comply
as directed. Discuss the use and application of this equipment with a Donaldson Torit representative. Instruct all
personnel on safe use and maintenance procedures.
Data Sheet
Model Number _____________________________ Serial Number ______________________________
Ship Date _________________________________ Installation Date _____________________________
Customer Name _______________________________________________________________________
Address _____________________________________________________________________________
____________________________________________________________________________________
Filter Type ____________________________________________________________________________
Accessories __________________________________________________________________________
Other ________________________________________________________________________________
Contents
Dryflo, MMA and MMB
Description ................................................................................1
Purpose and Intended Use .....................................................1
Rating and Specification Information ...................................2
Operation ...................................................................................3
Inspection on Arrival ...............................................................4
Installation Codes and Procedures ......................................4
Installation.................................................................................4
Unit Location .........................................................................4
Rigging Instructions.................................................................5
Hoisting Information ............................................................5
Electrical Wiring.......................................................................5
General Installation .................................................................6
Standard Equipment ................................................................8
Machine Mount ...................................................................8
Ceiling Mount ......................................................................13
Collector Stand ...................................................................14
Cart Installation ..................................................................15
Inlet Hopper with Flex-Duct ..............................................16
Inlet Hopper and Impact Separator ................................17
Electrical Connection ............................................................18
Pre-Wired Units ..................................................................18
Unwired Units .....................................................................18
Preliminary Start-Up Check .................................................19
Maintenance Information .....................................................20
Operational Checklist ........................................................20
Third-Stage Filter Cartridge Replacement .....................21
Optional Fourth-Stage HEPA Filter ..................................22
Drain Collection Container ................................................22
Impact Separator ...............................................................23
Optional Equipment................................................................24
Drain Collection Container ................................................24
Junction Box .......................................................................24
HEPA Filter ...........................................................................24
Troubleshooting ......................................................................25
Service Notes .........................................................................27
DANGER indicates a hazardous situation which, if not avoided, will result
in death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION, used with the safety alert symbol, indicates a hazardous
situation which, if not avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to personal injury that
may result in damage to equipment.
i
Donaldson Company, Inc.
Description Purpose and Intended Use
The Dryflo mist collector, Models MMA and MMB, mount
directly to a machining center to collect airborne mist
such as oil, water-soluble, and synthetic coolant from
machining operations. Three stages of filtration, plus an
optional HEPA filter, provide a cleaner, healthier work
environment as well as a more cost effective means
of mist collection. With airflow capacities from 390 to
800 cfm, the Dryflo is a strategic component to meeting
industrial and government air-quality standards. The high
efficiency filter cartridges allow air and coolants to be
recycled and the cartridge efficiency actually increases
as the collector operates.
Designed to increase the versatility of the collector,
standard options include inlet hoppers, impact
separators, drain collection methods and an adjustable
stand. A variety of filter media specifically designed
for mist collection, from heavy liquid-load to heavy
particulate-load applications, is also available.
Misuse or modification may result
in severe personal injury and/or
property damage.
Do not misuse or modify.
Airborne mist is small droplets of liquid suspended in the
air. Dryflo mist collectors are widely used in machine
tool operations using metalworking fluids. Metalworking
fluids include straight oil, water-soluble coolants, soluble
oil, and semi-synthetic coolants. These fluids perform
a variety of functions such as lubricating or cooling the
part or the tool, flushing chips away from the part, and
suppressing dust and smoke. Oils and coolants allow
machines to operate faster and tools to last longer
resulting in high quality parts.
Mist is created two ways: mechanical action or thermal
effects. Mechanical action refers to aerosol used for
light lubrication and generally creates mist greater than
one micron in size. Thermal effects occur when heat
vaporizes the coolant; the vapor cools and recondenses
into a mist. Thermal effects create mist from 0.01 to 1
micron in size. Other contaminants, such as dust from the
part or the tool or smoke from the combustion of the oil
or coolant are also generated when using metalworking
fluids.
The Dryflo can collect some dust with the mist; however,
it should not be operated without mist. The collector is
not designed to handle water mist alone. There should be
some type of material to allow coalescing, or water vapor
will pass through the filters. The extremes of very heavy
oil and light, thin oil should be avoided. Very heavy oil,
similar to tar consistency, will not drain while very light,
thin oil, similar to gasoline consistency, may evaporate.
Combustible materials such as buffing lint, paper, wood, metal dusts, weld fume, or flammable
coolants or solvents represent potential fire and/or explosion hazards. Use special care when
selecting, installing, and operating all dust, fume, or mist collection equipment when such combustible
materials may be present in order to protect workers and property from serious injury or damage due to a
fire and/or explosion.
Consult and comply with all National and Local Codes related to fire and/or explosion properties of
combustible materials when determining the location and operation of all dust, fume, or mist collection
equipment.
Standard Donaldson Torit equipment is not equipped with fire extinguishing or explosion protection systems.
1
Rating and Specification Information
Front View Typical Side View
Dryflo, MMA and MMB
All Collectors*:
Housing rating, inches water gauge ...........................+/- 20
Control power ..............................................120-Volt 50/60 Hz
*If unit was supplied with a Record Drawing, the
specifications on the drawing will supersede the
standard specifications above.
2
Donaldson Company, Inc.
Operation
During normal operation, contaminated air enters the
collector through the dirty-air inlet on the bottom of the
unit. The air passes through a reusable first-stage filter
designed to collect and coalesce large droplets and
particles. Smaller mist droplets pass to a second-stage
filter wrap where the small droplets coalesce into larger
droplets.
clean-air outlet
clean-air plenum
The third and most efficient stage of filtration is the
pleated filter specifically designed to collect, coalesce,
and drain fine mist. As the mist coalesce, the droplets are
big enough to run down the element and drain back into
the collector. The droplets will drain on both the inside
and outside of the filter cartridge. Liquid that collects on
the inside of the cartridge drains back into the machine
center. Clean, mist-free air exits the filter cartridge and
discharge through the top of the collector.
blower
third-stage
filter cartridge
second-stage
filter wrap
exhaust pack
blower motor
large droplets
first-stage
filter
large droplets
dirty-air inlet
and collected mist drain
Collector Operation
3
Dryflo, MMA and MMB
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
filtered air in your facility.
Consult with the appropriate authorities
having jurisdiction to ensure compliance
with all national and local codes regarding
recirculating filtered air.
Safe and efficient 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).
Installation
Use proper equipment and adopt
all safety precautions needed for
servicing equipment.
Electrical service or maintenance work must
be performed by a qualified 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 classified 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 sufficient to support dead,
live, seismic, and other anticipated loads.
Consult a qualified engineer for final selection
of anchorage.
The collector is suitable for indoor installations.
Reference the Rating and Specification Information.
Foundations or Support Framing
A qualified 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.
4
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 qualified engineer for final selection of
foundation or support framing.
Donaldson Company, Inc.
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.
Mist 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
connections, to simplify mist collection container
handling and routine maintenance, and to ensure the
straightest inlet and outlet ducts.
Site Selection
This collector can be located on a foundation or
structural framing. It can also be suspended or hung
from overhead supports. The supports must be adequate
to carry the live load of the collector and installed to
reduce sway or vibration to the collector.
Provide clearance from heat sources and avoid any
interference with utilities when selecting the location.
Reference the Rating and Specification Information.
Rigging Instructions
Suggested Tools & Equipment
Clevis Pins and Clamps Lifting Slings
Crane or Forklift Pipe Sealant
Drift Pins Pipe Wrenches
Drill and Drill Bits Screwdrivers
End Wrenches Socket Wrenches
Adjustable Wrench Spreader Bars
Torque Wrench (inch/lbs, 9/16-in Socket)
Hoisting 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 Specification Control drawing for weight and
dimensions of the collector and components to ensure
adequate crane capacity.
Allow only qualified 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 flanges during
assembly.
5
Electrical Wiring
Electrical work during installation
must be performed by a qualified
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 classified hazardous
atmospheres without an enclosure rated for
the application.
All electrical wiring and connections, including electrical
grounding, should be made in accordance with the
National Electric Code (NFPA No. 70-latest edition).
Check local ordinances for additional requirements that
apply.
The appropriate wiring schematic and electrical rating
must be used. See unit’s rating plate for required voltage.
Dryflo, MMA and MMB
If the unit is not furnished with a factory-mounted
disconnect, an electric disconnect switch having
adequate amp capacity shall be installed in accordance
with Part IX, Article 430 of the National Electrical Code
(NFPA No. 70-latest edition). Check unit’s rating plate for
voltage and amperage ratings.
Refer to the wiring diagram for the number of wires
required for main power wiring and remote wiring.
6
Donaldson Company, Inc.
General Installation
1. Apply a generous amount of sealant when installing
attachments.
2. Position the collector above the mist-capture zone.
See Collector Positioning.
3. Do not allow a P-Trap to form when using flexible
duct. See Flex-Duct Positioning.
4. On enclosed-machine installations, mount the unit
as far from the chip conveyor opening as possible.
Installing too close allows the negative pressure
created by the unit to draw clean shop air, not
mist, into the collector. See Enclosed-Machine
Installation.
5. On open-machine installations, position the unit’s
pick-up hood a minimum of 12-inches from the mist
source. Avoid mounting the pick-up hood too close
to the mist source of an open machine such as a
wet surface grinder. Installing too close can shorten
filter life as the unit will collect large droplets and
particulate instead of mist. See Open Machine
Installation.
Correct
P-trap
Incorrect
Flex Duct Positioning
machine
center
machine
center
machine center
Correct
Incorrect
machine center
Collector Positioning
7
Correct Location
Dryflo, MMA and MMB
large droplets
and particulate
enter pick-up
hood
Incorrect Location
Enclosed Machine Installation
Open Machine Installation
8
Donaldson Company, Inc.
Standard Equipment
Machine Mount
Because the air inlet also serves the unit as a drain,
the collected mist droplets drain back into the machine
center. Machine mounting, or collection at the source is
the most efficient means of mist collection.
1. Position the mist collector’s inlet so the air flows
through the machine center, across the chuck, and
then into the collector.
2. Apply a generous amount of sealant to the mounting
flange.
3. Lift unit over machine center and lower slowly.
Secure using hardware supplied.
Inlet Gasket
An inlet gasket is used on machine centers that have a
large, flat unobstructed top surface.
1. Lift the unit into position over the machine center and
lower slowly.
2. Open the unit’s access door and remove the filter
cartridge, filter retention mechanism, and the firststage filter.
3. Trace the lower hopper opening onto the machine
center, cut hole, and remove unit.
4. Align the bolt template with the cut out and matchdrill the bolt holes using a 5/16-in diameter drill bit.
Remove and discard template.
5. Remove the protective backing from the gasket and
apply to the machine center adhesive side down.
6. Lift unit into position and lower slowly. Fasten using
6mm bolts, washers, and hex nuts supplied.
Start bolts from the inside of
the machine center. Do not
overtighten. Compress gasket 3/16-in maximum.
Sealant
7. Install a bolt into every rivnut hole.
sealant
inlet gasket
washer
bolt
Inlet Gasket
9
Inlet Hopper with Legs
Dryflo, MMA and MMB
This option is for machine centers that do not allow
the collector to mount flush to the top. A leg mounted
to the left side of the unit and a hopper mounted to the
right side provide a raised, level surface on the machine
center.
1. Lift the unit approximately 5-ft.
2. MMA: remove plugs or existing bolts from the five
holes on the bottom left side of the unit. Apply
sealant to the leg flange.
Align the holes in the leg with the five holes on
the unit and secure using bolts removed in Step 2.
MMB: remove plugs or existing bolts from the four
corner holes on the bottom left side.
Apply sealant to the gussets and fasten each
gusset to the collector using the bolts and washers
supplied.
3. Apply sealant to the hopper’s top flange toward the
outside edge of the bolt pattern.
4. Align the holes in the hopper flange with the holes in
the collector and fasten using the bolts and washers
supplied.
5. Lift the assembled unit into position over the machine
center and lower slowly. Do not remove crane.
6. Open the unit’s access door and remove the filter
cartridge, filter retention mechanism, and the firststage filter.
7. Trace the lower hopper opening and flange bolt
pattern onto the machine center; remove unit, cut the
inlet hole, and drill bolt holes using
a 5/16-in diameter drill bit.
8. Apply a 1/4-in diameter bead of sealant to the
machine center, toward the outside edge of the bolt
pattern.
9. Lift unit into position and lower slowly aligning bolt
patterns. Fasten unit to machine center using 1/4-in
customer-supplied bolts, washers, and hex nuts.
leg
sealant
hopper
gusset
sealant
hopper
Inlet Hopper with Legs or Gussets
10
Donaldson Company, Inc.
Inlet Hopper with Vibration Isolators
A vibration isolation kit is for top-mounted units installed
on machine centers sensitive to vibration. The kit
includes four isolators, a support frame, hopper, 6-in
diameter flexible duct and a duct collar with mounting
flange and two hose clamps.
1. Carefully lift unit and turn over so the bottom inlet is
facing up.
8. Turn unit upright, lift into position over the machine
center and lower slowly. Do not remove crane.
9. Match-drill four holes in the machine center for
securing the legs.
10. Open the unit’s access door and remove the filter
cartridge, filter retention mechanism, and the firststage filter.
2. Remove plugs or existing hardware from the five
holes on the unit’s left side.
3. Apply sealant to the leg’s top flange and secure to
unit using the hardware removed in Step 2.
4. Apply sealant to the inlet collar toward the outside
edge of the bolt pattern. Fasten inlet collar to the
hopper’s bottom flange using the bolts, washers, and
hex nuts supplied.
5. Apply sealant around the hopper’s top flange toward
the outside of the bolt pattern.
6. Align the top flange of the hopper with the bolt
pattern on the bottom of the unit and secure using
6mm bolts and washers supplied.
7. Attach remaining leg to the right side of the unit
following the same procedure.
11. Position the inlet collar on the machine center and
trace the inlet opening and bolt pattern. Remove inlet
collar, cut inlet hole, and drill bolt holes using a
3/16-in diameter drill bit.
12. Apply a 1/4-in diameter bead of sealant to the
machine center, toward the outside edge of the bolt
pattern.
13. Align collar and fasten to machine center using
1/8-in customer-supplied bolts, washers, and hex
nuts.
14. Fasten the isolators to the machine center.
15. Lift unit into position over the vibration isolators and
lower slowly. Fasten using the supplied hardware.
16. Connect the flexible duct using the supplied hose
clamps.
11
Dryflo, MMA and MMB
sealant
hopper
sealant
flex-duct collar
hose clamp
flex-duct
hose clamp
inlet collar
leg
vibration
isolator
Inlet Hopper with Vibration Isolators
12
Donaldson Company, Inc.
Ceiling Mount
1. Use cable or chain attached to each eyebolt to
suspend the unit from the ceiling.
45°
Top View
60°
2. Position the chain to form a 60° angle to the top of
the unit and a 45° angle with the sides.
3. Level unit in all directions.
customer-supplied
chain or cable
eye bolts
flat washer
existing mounting holes
use sealant
13
Front View
Ceiling Mount
Collector Stand
For applications with limited mounting surfaces, an
adjustable stand is available. Bolt the stand’s base
securely to the floor, attach the collector, and adjust
height from 84 to 102-in.
1. Install customer-supplied 3/8-16 anchor bolts in the
floor extending 1 1/2-in above surface.
2. Level the collector stand and tighten anchor bolts
securely.
3. Lift the unit and remove the bolts from the access
panel located on the bottom of the unit. Remove bolts
only. Do not remove access panel.
4. Adjust the stand height by loosening the four locking
bolts on the upper portion of the stand. Slide this
section up to obtain the required height. Tighten bolts
securely. Do not adjust the stand over 102-inches.
5. Using a crane or forklift, lift the unit into position over
the stand and lower slowly.
stand
extension
hex nut
flat washer
Dryflo, MMA and MMB
102-in
maximum
6. Fasten the top plate of the stand to the unit using the
bolts removed in Step 3.
7. Tighten all hardware and remove crane.
flat washer
lock washer
locking bolt
base
Collector Stand
14
Donaldson Company, Inc.
Cart Installation
For applications requiring a mobile mist collector.
1. Turn the unit on its back with the door facing up.
2. Select a front, side, or back location on the hopper
for the flex-duct. Choose the location that provides
the shortest duct length.
3. Apply sealant to the hopper top flange. Position the
hopper so that the inlet hole is directed toward the
machine center. See Cart Installation.
4. Align the hopper flange bolt pattern with the bolt
pattern on the inlet and fasten using the hardware
supplied.
5. Remove and discard the eight bolts from the motor
access panel. Do not remove the panel; it is sealed to
the collector.
6. Lay the cart frame assembly on the ground. Align
the cart to the collector at the motor access panel
location. Bolt the unit to the cart using eight
M6 x 38mm bolts and washers supplied.
10. Apply sealant to one of the 6-in inlet collar flanges.
Fasten to hopper at the flex-duct location using the
hardware supplied.
11. Connect flex-duct to the collar and fasten with a
hose clamp.
12. Trim the flex-duct to length. Do not allow the flexduct to sag. Coolant can collect in sagging areas and
re-entrain into the system resulting in shortened filter
life.
13. Prime the P-Trap by pouring a full cup coolant into
the hopper and allow it to settle in the P-Trap.
14. To change from a front to a back flex-duct location,
remove the front access cover and reposition the
collar and flex-duct assembly. Apply sealant and
attach the access cover to the open hopper hole.
7. Turn cart and collector assembly upright.
8. Thread the P-Trap assembly to the hopper drain.
Stop when the P-Trap tailpiece is toward the back of
the collector. See Flex-Duct Positioning on Page 8.
9. Remove cover from collection container and place
container under the unit’s hopper. Insert the P-Trap
outlet into the collection container.
inlet collar
hose clamp
flexible
duct
Cart Installation
15
Inlet Hopper with Flex-Duct
This option is available for ceiling mounted units or units
on customer-supplied stands. Included components are
a 6-in diameter collar, 10-ft flexible duct, two six inch
hose clamps, and a six inch mounting collar.
1. Lift the unit approximately 5-ft.
2. Apply sealant around the flex-duct collar toward the
outside of the bolt pattern.
3. Align the adapter with the bottom flange of the
hopper. Fasten using bolts, washers, and hex nuts
supplied.
4. Apply sealant around the hopper’s top flange toward
the outside of the bolt pattern.
5. Align the top flange of the hopper with the bolt
pattern on the bottom of the unit and secure using
6mm bolts and washers supplied.
Note: Install a 6mm bolt into every rivnut.
Dryflo, MMA and MMB
sealant
hopper
6. Fasten one end of the flexible duct to the collar using
a six inch hose clamp.
7. Position the inlet collar on the machine center and
trace the inlet opening and bolt pattern. Remove inlet
collar, cut inlet hole, and drill bolt holes using a
3/16-in diameter drill bit.
8. Apply a 1/4-in bead of sealant to the machine center,
toward the outside edge of the bolt pattern.
9. Align collar and fasten to machine center using
1/8-in customer-supplied bolts, washers, and hex
nuts.
10. Trim the flexible duct to the required length and
secure with remaining hose clamp.
Do not allow flexible duct to
create a P-Trap. See Flex-Duct
Positioning.
sealant
flex-duct collar
hose clamp
flex-duct
hose clamp
inlet collar
Inlet Hopper with Flex-Duct
16
Donaldson Company, Inc.
Inlet Hopper and Impact Separator
Impact separators are available for remote-mounted
units in operations generating large amounts of small
particulate such as surface grinding, polishing, and highspeed cutting.
1. Lift the unit approximately 5-ft.
2. Apply sealant around the impact separator toward
the outside of the bolt pattern.
3. Align the impact separator with the bottom flange
of the hopper. Fasten using bolts, washers, and hex
nuts supplied.
4. Apply sealant around the hopper’s top flange toward
the outside of the bolt pattern.
5. Align the top flange of the hopper with the bolt
pattern on the bottom of the unit and secure using
6mm bolts and washers supplied.
Note: Install a 6mm bolt into every rivnut.
6. Fasten the flexible duct to the 6-in side inlet on the
impact separator using a hose clamp.
7. Connect opposite end of flexible duct to a customersupplied angular nozzle, inlet collar, or other fitting.
8. Install drain collection container as described in
Drain Collection Container.
hose clamp
flexible
duct
hose
clamp
optional drain
collection
container
Inlet Hopper with Impact Separator
sealant
hopper
sealant
impact
separator
17
Electrical Connection
Dryflo, MMA and MMB
Electrical work must be
performed by a qualified
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 classified hazardous
atmospheres without an enclosure rated for
the application.
Dryflo mist collectors must be equipped with a customersupplied safety disconnect with short circuit protection,
contactors, and overload protection. Complete the wiring
as shown in Motor Starter Wiring.
Pre-Wired Units
Pre-wired units include contactors and overload
protection that must be installed in a customer-supplied
safety disconnect switch. Complete the wiring as shown
in Motor Starter Wiring.
2. Make the wiring connections to the fan motor
according to the wiring diagram located inside the
control box and the instructions on the motor decal.
All electrical components must
be sized for the supply voltage
and motor horsepower. See Motor Starter
Wiring.
3. Turn the fan-motor ON then OFF and check for proper
rotation found on the fan label when viewed from
the back of the motor.
To reverse rotation, single-phase power supply:
Follow manufacturer’s instructions on the motor’s
nameplate.
To reverse rotation, three-phase power supply:
Turn electrical power OFF at source and switch any
two leads on the motor junction box.
Do not interchange a power lead
with the ground wire. Severe
damage or personal injury may result.
Unwired Units
1. Remove the exhaust pack. Remove all bolts
and lift starting at one corner.
The gasket material is fragile and
must be handled with care. If the
gasket is disrupted, reposition evenly around
the inner and outer flanges when replacing the
exhaust panel.
Disconnect
1OL
1L1
1L2
1L3
208/230/460/575/60/3
1FU
2FU
3FU
1M
1T1
1T2
1T3
inspection cover
fan wheel
fan motor
junction box
fan
motor
exhaust pack
Motor Starter Wiring
Power Pack
18
Donaldson Company, Inc.
Preliminary Start-Up Check
Instruct all personnel on safe use and maintenance
procedures.
Electrical work during
installation, service or
maintenance must be performed by a qualified
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.
Check that the collector is clear and free of all
debris before starting.
Do not install in classified hazardous
atmospheres without an enclosure rated for
the application.
Optional fans over 600 lbs must be
independently supported.
1. Check all electrical connections for tightness and
contact.
5. Check that fan exhaust damper is set to the fullyclosed position.
6. Check and remove all loose items in or near the inlet
and outlet of the collector.
7. Check that all remote controls and solenoid
enclosures (if applicable) are properly wired and all
service switches are in the OFF position.
8. Check that all optional accessories are installed
properly and secured.
9. Turn power ON at source.
10. Turn fan motor ON.
12. Adjust airflow with the exhaust damper.
Excess airflow can shorten filter
life, cause electrical system
failure and fan motor failure.
2. Check for proper rotation as noted on the fan and/or
hopper discharge device housing.
To reverse rotation, single-phase power supply:
Follow manufacturer’s instructions on the motor’s
nameplate.
To reverse rotation, three-phase power supply:
Switch any two leads on the
motor junction box.
Do not look into fan outlet to
determine rotation. View the fan rotation
through the back of the motor.
Check that the exhaust plenum is free of tools
or debris before checking blower/fan rotation.
Stand clear of exhaust to avoid personal injury.
Do not interchange a power lead with the
ground wire. Severe personal injury and/or
property damage may result.
3. All access panels should be sealed and secure.
4. Check that the dust container is properly sealed and
clamped.
19
Maintenance Information
Dryflo, MMA and MMB
Instruct all personnel on safe use and maintenance
procedures.
Use proper equipment and adopt
all safety precautions needed for
servicing equipment.
Use appropriate access equipment and
procedures. Note the standard collector is not
equipped with access platforms unless noted
on the specification drawings.
Electrical service or maintenance work must
be performed by a qualified 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 classified hazardous
atmospheres without an enclosure rated for
the application.
Operational Checklist
3. Monitor exhaust. Exhaust should remain visually
clean throughout filter life. If leaks are visible, check
the filter cartridge and optional HEPA filter for
positive gasket seals.
4. Monitor hopper drainage. If slow or stopped, check
hopper for obstructions and clean as necessary.
Check first-stage filter and clean as required.
5. Monitor second-stage filter wrap.
1. Monitor the physical condition of the collector and
repair or replace any damaged components.
Routine inspections will minimize downtime and
maintain optimum system performance. This
is particularly important on continuous-duty
applications.
2. Monitor pressure drop across filters.
Abnormal changes in pressure drop indicate a
change in operating conditions and possibly a fault
to be corrected. If the pressure gauge is in the red
zone, the second-stage filter wrap or third-stage
filter cartridge may need replacement. In some
applications, it may be necessary to replace the
second-stage filter wrap two to three times during
the life of a single, third-stage filter cartridge. To
determine if the second-stage filter wrap needs
replacing, install a clean wrap, restart the unit, and
check the pressure gauge reading. If the gauge is
now in the green zone, continue to operate the unit
with the new wrap. If the gauge still reads in the red
zone, the filter cartridge needs replacement.
20
Donaldson Company, Inc.
Second-Stage Filter Wrap Replacement
Use proper safety and protective
equipment when removing
contaminants and filters.
Dirty filters may be heavier than they appear.
Use care when removing filters to avoid
personal injury.
Note: Replace the second-stage filter wrap and third-
stage filter cartridge at the same time for easy
maintenance.
1. Remove the filter cartridge by pulling the filter
retention lever out and down to a horizontal position.
Remove cartridge from unit.
2. Pull wrap from filter cartridge and dispose of
properly.
3. Install new wrap, aligning the top of the wrap to the
top of the cartridge and fasten securely with hook
and loop fastener.
Third-Stage Filter Cartridge Replacement
Note: Replace the second-stage filter wrap and third-
stage filter cartridge at the same time for easy
maintenance.
1. Remove the filter cartridge by pulling the filter
retention lever out and down to a horizontal position.
Remove cartridge from unit.
Note: A large plastic garbage bag placed over the top
of the used filter allows cleaner filter change out.
The filter can be tipped forward and out of the
unit while the bag is pulled up over the bottom of
the cartridge.
2. Place new filter and wrap on the filter retention
platform, gasket side up. Slide filter back as far as it
will go and center side-to-side.
3. Lift the filter retention lever up and close access
door.
4. Replace filter cartridge and secure with filter
retention mechanism.
Do not operate the collector
without the second-stage filter
wrap installed. Significant reduction in filter
cartridge life may result.
exhaust pack
filter retention lever
lift and turn latch
first-stage filter
power pack
third-stage filter cartridge
with second-stage filter wrap
dirty-air inlet
and mist drain
21
Dryflo Mist Collector
Dryflo, MMA and MMB
Drain Collection Container
third-stage
filter cartridge
second-stage
filter wrap
filter retention
lever
Second- and Third-Stage Filter Replacement
Optional Fourth-Stage HEPA Filter
1. Release the latches on both sides of the HEPA filter
frame. Dispose of used filter properly.
1. Turn unit OFF.
2. Remove the container by unscrewing the container
from the cap. Clean the container, faucet, and
reinstall.
Note: Close the faucet before turning the collector back
ON.
hopper
drain
2. Install new HEPA filter with the gasket facing the
frame and the airflow arrow pointing away from the
unit.
latch
airflow
HEPA filter
HEPA Filter Replacement
faucet
Drain Collection Container
22
Donaldson Company, Inc.
Impact Separator
1. Remove the first, second, and third-stage filters and
the filter retention mechanism. Clean the hopper and
impact separator by scraping the particulate out,
being careful to keep particulate out of the drain.
2. Replace the filter retention mechanism and filters.
sealant
hopper
sealant
hose clamp
flexible
duct
hose
clamp
optional drain
collection
container
Impact Separator and Inlet Hopper
impact
separator
23
Optional Equipment
Dryflo, MMA and MMB
Drain Collection Container
The optional drain collection container is available for
use with an impact separator only. A semi-clear onegallon plastic container attached to the bottom of the
impact separator collects small particles and coolant.
To install, simply thread the container onto the bottom
of the impact separator. The container’s faucet must be
closed when the unit is in operation.
hopper
drain
Junction Box
The junction box option offers quick and easy wiring
to the unit. The three-phase motor is pre-wired to the
customer’s supply voltage. The motor wires terminate
inside a junction box located on the outside of the
collector.
1. Remove the junction box cover plate.
2. Attach the ground wire to the ground terminal and
the three hot wires to the remaining terminals.
3. Replace junction box cover plate.
HEPA Filter
Used in place of the standard exhaust pack, the optional
HEPA filter is recommended for applications using
straight- or mineral-oil machining fluids that generate
smoke or other extremely small particulate.
faucet
Drain Collection Container
latch
airflow
HEPA filter
Optional HEPA Filter
24
Donaldson Company, Inc.
Troubleshooting
Problem Probable Cause Remedy
Fan blower and motor do
not start
Fan blower and motor
start, but do not stay
running
Clean-air outlet
discharging oil mist
Improper motor wire size Rewire using the correct wire gauge as specified by
national and local codes.
Not wired correctly Check and correct motor wiring for supply voltage.
See motor manufacturer's wiring diagram. Follow
wiring diagram and the National Electric Code.
Collector not wired for available
Correct wiring for proper supply voltage.
voltage
Input circuit down Check power supply to motor circuit on all leads.
Electrical supply circuit down Check power supply circuit for proper voltage.
Check for fuse or circuit breaker fault. Replace as
necessary.
Overload relay tripped Reset. Check amp draw on motor leads.
Defective overload heater or
Replace as necessary.
overload assembly
Incorrect motor starter heater
elements installed
Access doors are open or not
Check for proper heater elements and replace if
necessary.
Close and tighten access doors.
closed tight
Electrical circuit overload Check that the power supply circuit has sufficient
power to run all equipment.
Filters not installed correctly See Maintenance Information.
Filter damage, dents in the end
caps, gasket damage, or holes
in media
Replace filter as necessary. Use only genuine
Donaldson replacement parts. See Maintenance
Information.
Access cover(s) loose Tighten access doors securely.
25
Problem Probable Cause Remedy
Dryflo, MMA and MMB
Insufficient airflow
Liquid leaking out
bottom of door
Fan rotation backwards Proper fan rotation is clockwise from the top of the
unit. The fan can be viewed through the back of the
motor. See Preliminary Start-Up Check.
Access doors open or not
closed tight
Check that all access doors are in place and
secured.
Fan exhaust area restricted Check fan exhaust area for obstructions. Remove
material or debris.
First-stage filter plugged Remove and clean or replace.
Second-stage filter wrap
plugged
Remove and replace. Use only genuine Donaldson
replacement parts. See Second-Stage Filter Wrap
Replacement.
Filters need replacement Remove and replace. Use only genuine Donaldson
replacement parts. See Third-Stage Filter Cartridge
Replacement.
Plugged HEPA filter Remove and replace. See Optional Fourth-Stage
HEPA Filter.
Door does not fit tight Increase door gasket compression by removing door
and lifting off the hinges. Loosen the top door latch
nut. Turn lower latch nut, located under the larch
arm approximately three rotations clockwise. Tighten
top door latch nut and replace door. Check seal and
repeat if necessary.
26
Donaldson Company, Inc.
Service Notes
Date Service Performed Notes
27
The Donaldson Torit Warranty
Donaldson warrants to the original purchaser that the major structural components of the goods will be free
from defects in materials and workmanship for ten (10) years from the date of shipment, if properly installed,
maintained and operated under normal conditions. Donaldson warrants all other Donaldson built components
and accessories including Donaldson Airlocks, TBI Fans, TRB Fans, Fume Collector products and Donaldson built
Afterfilters for twelve (12) months from date of shipment. Donaldson warrants Donaldson built filter elements to
be free from defects in materials and workmanship for eighteen (18) months from date of shipment. Donaldson
does not warrant against damages due to corrosion, abrasion, normal wear and tear, product modification,
or product misapplication. Donaldson also makes no warranty whatsoever as to any goods manufactured or
supplied by others including electric motors, fans and control components. After Donaldson has been given
adequate opportunity to remedy any defects in material or workmanship, Donaldson retains the sole option to
accept return of the goods, with freight paid by the purchaser, and to refund the purchase price for the goods
after confirming the goods are returned undamaged and in usable condition. Such a refund will be in the full
extent of Donaldson’s liability. Donaldson shall not be liable for any other costs, expenses or damages whether
direct, indirect, special, incidental, consequential or otherwise. The terms of this warranty may be modified
only by a special warranty document signed by a Director, General Manager or Vice President of Donaldson.
To ensure proper operational performance of the equipment, use only genuine Donaldson replacement parts.
THERE EXIST NO OTHER REPRESENTATIONS, WARRANTIES OR GUARANTEES EXCEPT AS STATED IN THIS
PARAGRAPH AND ALL OTHER WARRANTIES INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, WHETHER EXPRESS OR IMPLIED ARE HEREBY EXPRESSLY EXCLUDED AND DISCLAIMED.
Parts and Service
For genuine Donaldson replacement filters and parts, call the Parts Express Line. For faster service,
have unit’s model and serial number, quantity, part number, and description available.
Donaldson Company, Inc.
Torit
PO Box 1299
Minneapolis, MN 55440-1299
U.S.A.
Donaldson Company, Inc. is the leading designer and manufacturer of dust, mist, and fume collection
equipment used to control industrial-air pollutants. Our equipment is designed to help reduce
occupational hazards, lengthen machine life, reduce in-plant maintenance requirements, and
improve product quality.
© 2002 Donaldson Company, Inc. IOM 7236900 (ENG), Revision 6
Printed in USA December 2016
800-365-1331 USA
800-343-3639 within Mexico
+52 (449) 300 24 42 Latin America
donaldsontorit@donaldson.com
donaldsontorit.com
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