MSA Abrasi-Blast User manual

Operating Manual
Abrasi-Blast™ Respirator
Order No.: 10089353/04
Print Spec: 10000005389 (B)
CR:800000041645
MSAsafety.com

© MSA 2007, 2010, 2011, 2022. All rights reserved
WARNING!
These instructions must be provided to users before use of the product and retained for ready reference by the user. Read this
manual carefully before using or maintaining the device. The device will perform as designed only if it is used and maintained in
accordance with the manufacturer's instructions. Otherwise, it could fail to perform as designed, and persons who rely on this
device could sustain serious injury or death.
The warranties made by MSA with respect to the product are voided if the product is not installed and used in accordance with
the instructions in this manual. Please protect yourself and your employees by following the instructions.
Please read and observe the WARNINGS and CAUTIONS inside. For additional information relative to use or repair, call
1-800-MSA-2222 during regular working hours.
MSA is a registered trademark of MSA Technology, LLC in the US, Europe and other Countries. For all other trademarks visit
https://us.msasafety.com/Trademarks.
1000 Cranberry Woods Drive
Cranberry Township, PA 16066
USA
Phone 1-800-MSA-2222
Fax [phone]
For your local MSA contacts, please go to our website www.MSAsafety.com

Contents
1 Introduction 5
1.1 NIOSH Approval Information 5
1.2 Important Notice for Respiratory Protection Program Administrators 6
1.3 Respirator Use Limitations Duo-Flo™ Mode 7
2 Description 9
2.1 All Configurations 9
2.2 Required Tools 9
2.3 Unpacking and Inspection 10
3 Assembling the Respirator 10
3.1 Respirator Assembly 10
4 Donning 15
4.1 Section A: Constant Flow Supplied-Air Type Respirators 15
4.2 Section B: Combination Duo-Flow Type Respirators 16
4.3 Section C: Air-Tightness Test (Face-to-Facepiece Seal) 17
4.4 Section D: Respirator Fit Tests 18
4.5 Section E: Final Hookup 19
5 Using the Respirator 20
5.1 Changing Cover Lenses 20
5.2 Supplied-Air Respirators 21
5.3 Combination Duo-Flo Type Respirators 21
6 Removing the Respirator 22
7 Cleaning and Disinfecting 23
8 Maintaining the Respirator 24
8.1 Inspection 24
8.2 Replacing the Filter Cartridge 25
9 The Lens Housing Assembly 26
9.1 Repositioning the Lens Housing Assembly 26
9.2 Positioning the Assembly 26
10 Accessories 27
10.1 Nosecup (for Ultravue Facepieces) 27
10.2 Spectacle Kit 27
10.3 Filter Cartridge Assembly 28
10.4 Abrasi-Blast Respirator Parts 30
11 Abrasi-Blast Hood Styles and Accessories 31
12 Lens Cartridges 32
13 Flow Control Devices 33
13.1 Adjustable Valve Connectors with Components 33
13.2 Combination Duo-Flo 33
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14 Air-Supply Hoses 35
14.1 Pressure Gauge Assembly 35
14.2 Air Source 35
14.3 Air-Supply Hose 35
14.4 Interconnecting Air-Supply Hoses 36
14.5 Quick-Disconnects 37
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1 Introduction
1.1 NIOSH Approval Information
Cautions and Limitations
A — Not for use in atmospheres containing less than 19.5 percent oxygen.
B — Not for use in atmospheres immediately dangerous to life or health.
C — Do not exceed maximum use concentrations established by regulatory standards.
D — Air-line respirators can be used only when the respirators are supplied with respirable air meeting the requirements of
CGA G-7.1 Grade D or higher quality.
E — Use only the pressure ranges and hose lengths specified in the User's Instructions.
G — If airflow is cut off, switch to filter and / or cartridge or canister and immediately exit to clean air.
H — Follow established cartridge and canister change schedules or observe ESLI to ensure that cartridges and canisters are
replaced before breakthrough occurs.
J — Failure to properly use and maintain this product could result in injury or death.
L — Follow the manufacturer's User's Instructions for changing cartridges, canisters and / or filters.
M — All approved respirators shall be selected, fitted, used, and maintained in accordance with MSHA, OSHA, and other
applicable regulations.
N — Never substitute, modify, add, or omit parts. Use only exact replacement parts in the configuration as specified by the
manufacturer.
O — Refer to User's Instructions, and / or maintenance manuals for information on use and maintenance of these respirators.
P — NIOSH does not evaluate respirators for use as surgical masks.
S — Special or critical user's instructions and / or specific use limitations apply. Refer to User's Instructions before donning.
S- Special or Critical Users Instructions
The wearer must comply with the following MSA respirator use limitations:
1. The limitations outlined in the applicable NIOSH approval.
2. Any applicable limitation contained in a standard established by a regulatory agency (such as OSHA) with jurisdiction
over the wearer.
3. Users must wear suitable protective clothing and precautions must be taken so that the respirator is not worn in
atmospheres that may be harmful to the device.
a. Do not wear for protection against substances withbpoor warning properties or those which generate high heats of
reaction with sorbent material in the filter.
b. Make certain conditions of exposure are within the limits for which the device is approved.
4. Refer to the tables found in Sections A, and B for specific supply hose and pressure limitations for the Abrasi-Blast.
Also, for more detailed information, refer to the approval label as stated below in step 9.
5. The Advantage® 4000 Facepiece is not authorized for use without a nosecup.
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1 Introduction

6. This approval applies only when the device is supplied with respirable air through 8 to 300 feet of air supply hose within
the pressure range stated within this user's manual.
7. A maximum of 12 sections, straight or uncoiled, of air supply hose may be used in making up the maximum working
length of hose. Each section of coiled hose, regardless of length, is considered 50 feet in length (max.: 6 sections).
8. Below 32° F, add the following nosecups to the Ultravue® Facepiece: 471539, 471540, or 471541.
9. NIOSH approval information is included as a supplement (P/N 10122516) to these instructions for Abrasi-Blast
Respirators.
1.2 Important Notice for Respiratory Protection Program Administrators
1. Before occupational use of this respirator, a written respiratory protection program must be implemented meeting all the
local government requirements. In the United States, employer must comply with OSHA 29 CFR 1910.134 which
includes medical evaluation, training, and fit testing.
2. An adequate respiratory protection program must include knowledge of hazards, hazard assessment, selection of proper
respiratory protective equipment instruction and training in the use of equipment, inspection and maintenance of
equipment, and medical surveillance. [See OSHA regulations, Title 29 CFR, Part 1910.134, Subpart I, Par. 1910.134
(c).]
3. This respirator may be used only after proper instruction and training in its use as specified in OSHA regulations Title 29
CFR, Part 1910.134, Subpart 1, Par. 1910.134 (b) (3).
4. Do not mark the respirator, i.e., with stamps, labels, paint or other method. Use of such markings may interfere with
apparatus use or may constitute a flammability hazard.
5. Be sure that no other equipment interferes with the respirator facial seal, the user’s ability to operate the respirator, or
other necessary means of mobility.
For more information on the SCBA use and performance standards, consult the following publications:
• ASTM F3387, Latest edition, Standard Practices for Respiratory Protection, ASTM International
https://www.astm.org/Standards/F3387.htm? (ASTM F3387 formerly known as ANSI Z88.2)
• Title 29 CFR Part 1910, Occupational Safety and Health Standards, https://www.osha.gov/law-regs.html
• Title 29 CFR Part 1910.134, Respiratory Protection Standard, https://www.osha.gov/law-regs.html
• Compressed Gas Association, Inc., https://www.cganet.com/
WARNING!
1. Read and observe all NIOSH and other approval limitations as they apply to using the breathing apparatus.
2. DO NOT use the respirator as an underwater device.
3. This system must be supplied with respirable [Quality Verification Level (Grade) D, see ANSI/CGA G-7.1] or higher
quality air; and a dew point not to exceed -65°F (24ppm v/v) [Compressed Gas Association Specification G-7.1 for
Quality Verification Level (Grade) D Gaseous Air].
4. This device may not seal properly with your face if you have a beard, gross sideburns or similar physical characteristics
(see NFPA-1500 and ASTM F3387 - latest edition). An improper facial seal may allow contaminants to leak into the
facepiece, reducing or eliminating respiratory protection. Do not use this device if such conditions exist. The face-to-
facepiece seal must be tested before each use. Never remove the facepiece except in a safe, nonhazardous non-toxic
atmosphere.
5. Return to a safe atmosphere immediately if discoloration, crazing, blistering, cracking or other deterioration of the lens
material is observed.
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1 Introduction

6. Users must wear suitable protective clothing and precautions must be taken so that the respirator is not exposed to
atmospheres that may be harmful.
7. Take into account the following factors which may affect the duration or the service life.
a. the degree of physical activity of the user;
b. the physical condition of the user;
c. the degree that the user's breathing rate is increased by excitement, fear, or other emotional factors;
d. the degree of training or experience which the user has had with this or similar equipment;
e. whether or not the cylinder is fully charged;
f. the presence in the compressed air of carbon dioxide concentrations greater than the .04% level normally found in
atmospheric air;
g. the atmospheric pressure; if used in a pressurized tunnel or caisson at 2 atmospheres (15 psig gauge) the duration
will be one-half as long as when used at 1 atmosphere; at 3 atmospheres the duration will be one-third as long;
h. the condition of the apparatus.
8. DONOTmodify this respirator.
Failure to follow these warnings can result in serious personal injury or death.
WARNING!
Particles and contaminants can enter a suppliedair respirator system when air supply hoses are dis connected and/or
reconnected in a contaminated atmosphere. This could result in serious injury or death depending on the toxicity of the
contaminant involved. It is the responsibility of the user to deter mine the potential risk and to take the necessary pre cautions
which may include a requirement that NO disconnection or reconnection of air-supply hoses be permitted in a contaminated
atmosphere. If in doubt DO NOT disconnect and/or reconnect.
Failure to follow this warning can result in serious personal injury or death.
1.3 Respirator Use Limitations Duo-Flo™ Mode
Maximum Use Concentration - Duo-Flo Mode
Do not exceed ANYof the applicable maximum use concentrations listed in Table 1 Maximum Use Concentrations.
Mixtures of Contaminants -
NIOSH allows this respirator to be used for protection against a mixture of contaminants that are present simultaneously or
used alternately against one contaminant then another (using the same filters) if the mixture meets the following conditions:
a. The filter must be approved for all contaminants present.
b. Contaminants present simultaneously must be below IDLH levels for the specific contaminants. If any one
contaminant in the mixture exceeds the IDLH concentration then the entire mixture must be treated as IDLH and
the respirator cannot be used (except for escape from particulates with appropriate filter).
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1 Introduction

Table 1 Maximum Use Concentrations
Respirator Type
Respirator Use
Respirators with
Particulate Filters or
Filter Cartridges
Routine Use in Supplied-Air Mode - Including Entry
Continuous Use and Non-Emergency Egress
1,000 Times Exposure
Limit
Routine Use in Air-Purifying Mode - Including Entry,
Continuous Use, Non-Emergency Egress and /or Moving
from Station-to-Station
50 Times Exposure Limit
Emergency Escape in Air-Purifying Mode Unlimited
Exposure Limits for Mixtures
The American Conference of Government Industrial Hygienists (ACGIH) publishes the following information to determine the
TLV of a mixture.
First, determine the total concentration of the chemical mixture (CMixture) from the individual contaminant concentrations (C1,
C2, C3...) using the following formula:
CMixture = C1+C2+C3+...
The TLV of the mixture is found by using the following formula where T1, T2, T3... are the individual contaminant TLVs and C1,
C2, C3, ... are the individual contaminant concentrations:
Only use these equations if the contaminants present are actually mixed. Some substances do not mix and may be present
separately, for example, in pockets or at different levels. In that case, the lowest TLV of the substances present must be used
to determine the appropriate respirator category for protection against all contaminants present.
Exposure Limits
A listing of acceptable exposure limits from the following sources.
• American Conference of Government Industrial Hygienists (ACGIH)
• Occupational Safety and Health Administration (OSHA)
• National Institute for Occupational Safety and Health (NIOSH)
• American Industrial Hygiene Association (AIHA)
Contact MSA at 1-800-MSA-2222 for information.
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1 Introduction

2 Description
You may wish to make a permanent record of your complete system as an aid for ordering replacement parts. Use the listing
below to keep a record of your configuration in this manual.
Assembly Part Number
Hood
Cover Lens
Facepiece
Flow Control Valve
Air Supply Hose
During abrasive blasting operations, the facepiece lens is protected by two to four flat-glass cover lenses. Each cover lens is
removed by two pull-tabs when it becomes so scratched that vision is reduced. Respirator approval requires the use of the
proper length of approved air-supply hose, approved fittings, and a respirable air source.
When using the Duo-Flo Respirator, the user breathes through the filter until connecting the air-line. The suppliedair mode of
operation may be used for long periods of time without depleting the filter. The air-purifying mode of operation also may be used
for extended periods of time when an air source is not available. During use, the respirator remains in the supplied-air mode of
operation so long as the user is connected to an air-line air source. The air-purifying mode of operation is entered
“automatically” if the air-line air source is disconnected or lost for any reason.
2.1 All Configurations
Constant Flow Adjustable Valves
Adjustable valves allow the user to vary air flow within NIOSH-required flow rates.
Duo-Flo
The Duo-Flo valve, used in conjunction with the Ultra filter (P/N 816255), enables the user to enter and escape from
contaminated atmospheres without using the air-line air supply.
2.2 Required Tools
Abrasi-Blast Respirator systems may be assembled with standard tools and materials following good work practices. These
assembly tips may help:
1. All tapered pipe connections should be wrapped with pipe sealing tape (applied one thread back from the end) before
assembly.
2. Open-end wrenches and slip-joint pliers should be used to tighten all threaded connections, unless specifically noted
otherwise.
3. Test all threaded connections under pressure with a commercial leak-test solution or soapy water. If a leak is detected,
locate the source and correct it before using the respirator.
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2 Description

2.3 Unpacking and Inspection
The Abrasi-Blast Respirator consists of the following sub-assemblies:
• hood
• facepiece
• breathing tube
• support belt
• collar
• lens housing assembly
• waist strap
• adjustable valve-connector or Duo-Flo adapter
• air-supply hose socket assembly
• cover lens cartridge
CAUTION!
Thoroughly inspect the respirator and all components when received and before using. Read and observe all NIOSHapproval
limitation as they apply to using the Abrasi-Blast Respirator.
Failure to follow this caution can result in minor or moderate injury.
3 Assembling the Respirator
3.1 Respirator Assembly
Air-Supply Hose
The respirator can be used with a wide range of MSA air supply hoses, which can be interconnected up to a maximum length of
300 feet. A maximum of 12 sections of air supply hose may be used in making up the maximum working length of hose. The
coiled hoses are considered to be the indicated length, although actual extended lengths can be less than indicated. (Maximum
of one section of 8, 15, or 25 ft. of coiled hose or 6 sections of 50 ft. coiled hoses).
MSA also offers an inlet pressure-gauge assembly that enables a user to check pressure at the inlet of the MSA air-supply
hose, thus ensuring that the air pressure is within the NIOSH approved range. The gauge is supplied with a quick-disconnect
fittings to accommodate your particular air-line system.
Part numbers for various MSA air-supply hoses that can be used are listed in Table 8 Air-Supply Hoses.
WARNING!
• Particles and contaminants can enter an airline respirator system when air-supply hoses are disconnected and/or
reconnected in a contaminated atmosphere. This could result in inhalation of contaminants. It is the user's responsibility
to determine the potential risk and take the necessary precautions, which may require prohibiting disconnection or
reconnection of air-supply hoses in a contaminated atmosphere. If in doubt DO NOT disconnect and/or reconnect.
• MSA air-supply hoses have various temperature limitations. Do not use when inlet air-temperature exceeds the limits
specified for each hose material.
• Check all hose connections to be sure fittings are secure. This must be done to ensure a continuous flow of air.
• Do not use non-locking quick-disconnects to interconnect air-supply hoses. Use only the threaded connector (3/4-16
UNF) or the locking type quick-disconnects listed.
Failure to follow these warnings can result in serious personal injury or death.
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3 Assembling the Respirator

NOTE: Follow the steps below to assembly the respirator. Do not don the respirator until all steps in this section are
completed.
1. Install the breathing tube.
NOTE: The breathing tube may be worn either outside or under the hood. Follow the instructions that apply to assemble the
breathing tube.
a. If the breathing tube is worn outside the hood, locate the 3/4" hole in front of the
hood. Push the male threaded end of the breathing tube through the hole until
the hood seals around the first corrugation in the breathing tube.
b. If the breathing tube is worn under the hood, locate the 3/4" metal plug in the
collar inside the hood and remove it by stretching the rubber grommet.
c. Install the plug in the 3/4"hole in the front of the hood by stretching the rubber
material.
d. Push the threaded end of the breathing tube through the hole in the collar until
the rubber grommet seals around the breathing tube at the third corrugation.
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3 Assembling the Respirator

e. When using the parka hood (P/N807592), push the threaded end of the breathing tube through the elastic collar
located on the waist area of the hood.
2. Assemble the facepiece to the hood and breathing tube.
a. Unfasten the Velcro closure on the collar and insert the facepiece into the hood.
b. Align the lens housing assembly with the large opening in the hood.
c. Stretch the rubber front of the hood over the lens housing so that the rubber
forms a seal in the channel between the door frame and the lens housing
assembly.
d. Refasten the Velcro closure.
e. Attach the breathing tube to the facepiece by threading the coupling nut onto
the breathing tube. Be sure the gasket is in the couple nut. Hand-tighten.
3. Select the proper cover lens for the job.
NOTE: Use Table 2 Choosing a Cartridge as a general guide to choose the cartridge.
NOTE: A thinner cover lens may not give satisfactory service life because heavy abrasive may wear holes in the lens.
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3 Assembling the Respirator

a. To open the lens housing door, grasp the top corner of the plastic door and pull it
away from the hood.
b. Open the package of protective lens cartridges.
c. Insert the lens cartridge into the lens housing. The cartridge can be installed so
that the pull-tabs are either at the top or the bottom of the lens housing.
NOTE: Be sure the 2 pull-tabs are not caught in the lens door opening.
d. Close the lens housing door to force the lens cartridge into place. Pull on the door without flexing the latch to be
sure the door is secured.
4. If a filter cartridge is to be used, see 8.2 Replacing the Filter Cartridge for instructions.
NOTE: The filter cartridge is not approved for use on the combination Duo-Flo type respirator.
5. Disconnect the socket assembly from the valve-connector body and thread the
socket assembly on the air-supply hose.
6. Connect the opposite end of the air-supply hose to a respirable air source.
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3 Assembling the Respirator

NOTE: The pressure gauge assemblies listed below are available with fittings. The pressure gauge assembly is connected to
the air source where the air-supply hose from MSA is attached.
Part No. Description
476734 Snap-Tite / Parker
476735 Foster
476737 Hansen
476738 CEJN
476739 Foster (w/ check valve)
476740 Hansen (w/ check valve)
Table 2 Choosing a Cartridge
Lens Type Type of Service
.090" untempered medium abrasive blasting
.090" tempered medium abrasive blasting and
added protection against glass
breakage due to rough handling.
.120" untempered heavy abrasive blasting
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3 Assembling the Respirator

4 Donning
These steps must be followed each time the respirator is used.
WARNING!
• This respirator must be used only by trained personnel and according to MSA's instructions.
• Do not use the respirator as an underwater device.
• Wear impermeable protective clothing if exposed to poisons which can be absorbed by the skin.
• Wear appropriate protective clothing to protect your body from rebounding abrasive material.
• This system must be supplied with respirable air. See ANSI Z86.1-1973 [Compressed Gas Association Specification G-
7.1 for Quality Verification Level (Grade D) Gaseous Air].
• The air source must provide at least 4 cubic feet per minute (cfm) to each respirator, and maintain the required inlet
pressure range specified in this manual for the specific flow control device selected.
• If the air supply pressure is greater than maximum inlet pressure specified by the flow control device you are using, be
sure to use a pressure regulator between the air supply and air-supply hose. Adjust the regulator to deliver air at the
pressures specified by the flow control device you are using.
Failure to follow these warnings can result in serious personal injury or death.
4.1 Section A: Constant Flow Supplied-Air Type Respirators
1. Be sure that inlet air pressure is set per the following guidelines:
Gold Body
• High Pressure Systems Constant Flow
• Approved Air-Supply Hose Length:8-300 ft.
• Approved inlet air pressure to maintain 4 CFM minimum to facepiece:35-40 psig
2. Reconnect the socket assembly to the flow control valve (Constant Flow pictured).
3. Slide the belt clip of the flow control or the Duo-Flow valve over the support belt. Don the support belt and position the
valve so that it will be on your left side.
4. Turn the air supply on. Check for leaks with a commercial leak detection solution or soapy water. Tighten connections
as required. Turn off the air source.
NOTE: Attach the appropriate filter to the coupling nut at the bottom of the Duo-Flo valve.
5. Turn the back of the hood and collar “inside-out,” exposing the facepiece headstraps.
6. Adjust the facepiece headstraps so the end tabs are at the buckles.
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7. Grip the facepiece between your thumb and fingers with both hands.
8. Insert your chin into the lower part of the facepiece.
9. Pull the facepiece headstraps over your head.
10. Smooth the straps flat against your head.
a. Support the facepiece by holding the breathing tube at the coupling nut
assembly with one hand.
b. Tighten the lower (neck) straps.
NOTE: Pull the straps straight back, not out.
c. Tighten the side (temple) straps.
d. For the Ultravue Facepiece:Tighten the top (forehead) strap to position the lens for best vision and to support
the weight of the facepiece.
11. Skip section B. Refer to 4.3 Section C: Air-Tightness Test (Face-to-Facepiece Seal).
4.2 Section B: Combination Duo-Flow Type Respirators
1. Be sure that the inlet air pressure is set per the following guidelines:
Duo-Flow Valve
• High Pressure System
• Approved Air-Supply Hose Length:8-300 ft.
• Approved inlet air pressure to maintain 4 CFM minimum to facepiece:35-40 psig
• Dual-exhalation valve facepiece:32-37 psig
2. Reconnect the socket assembly to the Duo-Flo valve.
3. Attach the appropriate filter to the coupling nut at the bottom of the Duo-Flo valve.
4. Connect the breathing tube to the opening at the top of the Duo-Flo tube.
5. Turn the back of the hood and collar "inside-out,"exposing the facepiece headstraps.
6. Adjust the facepiece headstraps so the ends are at the buckles.
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4 Donning

7. Grip the facepiece between your thumb and fingers with both hands
8. Insert your chin into the lower part of the facepiece.
9. Pull the facepiece headstraps over your head.
10. Smooth the straps flat against your head.
a. Support the facepiece by holding the breathing tube at the end of the coupling
nut assembly with one hand.
b. Tighten the lower (neck) straps.
NOTE: Pull the straps straight back, not out.
c. Tighten the side (temple) straps.
d. For the Ultravue Facepiece:Tighten the top (forehead) strap to position the lens for best vision, and to support
the facepiece weight.
4.3 Section C: Air-Tightness Test (Face-to-Facepiece Seal)
WARNING!
If the breathing tube is worn under the hood, move your head from side to side as well as up and down to check for freedom of
head movement. If head movement is restricted, or this method compromises the face-to-facepiece seal in any way, wear the
breathing tube on the outside of the hood only.
Failure to follow this warning can result in serious personal injury or death.
Supplied-Air Respirators Only: Place the palm of your hand over the breathing tube
coupling nut, or place your thumb over the breathing tube opening inside the coupling nut.
Combination Duo-Flo Type Respirators Only:
1. Place your hands tightly over the inlet(s) of the filter.
2. Inhale gently so that the facepiece collapses against your face. Hold your breath for 10 seconds.
3. The facepiece should remain collapsed if the seal is air-tight.
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4 Donning

4. If the facepiece does not remain collapsed, readjust the head harness straps and re-test.
5. If an air-tight seal cannot be obtained and leakage is not caused by facial seal leakage, check the facepiece and
breathing tube for leaks. See 8 Maintaining the Respirator.
NOTE: Locate the problem and correct before using the respirator.
WARNING!
This device may not seal properly with your face if you have a beard, large sideburns or similar physical characteristics (see
ASTM F3387 - latest edition). An improper facial seal may allow non-respirable air to leak into the facepiece, reducing or
eliminating respiratory protection. The face-to-facepiece seal must be tested before each use.
Failure to follow this warning can result in serious personal injury or death.
4.4 Section D: Respirator Fit Tests
A qualitative or quantitative respirator fit test must be carried out for each wearer of a combination air-supplied and air purifying
type respirator. The test shall be performed in the air-purifying mode of operation and is necessary in order to determine the
amount of protection the respirator will provide while being used in the air-purifying mode.
Qualitative Test
If the wearer of the respirator passes a qualitative fit test, the respirator can be worn in contaminant (particulate)
concentrations up to the maximum use listed in Table 3 Maximum Use Concentration.
Quantitative Test
If the wearer of the respirator performs a quantitative fit test, the respirator can be worn in contaminant (particulate)
concentrations determined by the results of the test, but not to exceed the maximum use listed in Table 3 Maximum Use
Concentration.
In addition to the above limitations, the wearer must not exceed the limitations listed in the applicable NIOSH Approval or any
maximum use concentration controlled by OSHA regulations.
WARNING!
The user must perform a respirator fit test (Quantitative Test or Qualitative Test) and follow all warnings and limitations
specified.
Failure to follow this warning can result in serious personal injury or death.
Respirator fit test and protection factors are explained fully in ASTM F3387.,.
Table 3 Maximum Use Concentration
Facepiece Type Maximum Use Concentration
Full facepiece 50 times the TLV for the contaminant
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4.5 Section E: Final Hookup
1. Pull the respirator collar down around your neck.
NOTE: The collar is designed to stretch over your shirt or coverall collar to help seal
out dust.
2. Pull the back of the hood down in place on your shoulders.
NOTE: On the waist-length model, attach the waiststrap loosely to minimize restriction to head movement.
3. Turn the air-supply on.
4. Constant Flow: Connect the breathing tube coupling nut to the valve connector. Hand-tighten. Pull on the air-supply
hose to test the connection.
5. Duo-Flo Type Respirators: Connect the socket assembly to the Duo-Flo valve when it is desired to switch from the
air-purifying mode to the supplied-air mode of operation.
All Abrasi-Blast Respirators are equipped with a hood to provide limited protection to the user’s head and neck from rebounding
abrasive materials. The hood also provides limited protection to the facepiece lens by using removable glass lens covers.
Abrasi-Blast Respirators are available in waist and shoulder models which may be used with the breathing tube outside or
under the hood.
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4 Donning

5 Using the Respirator
WARNING!
• Do not use an Abrasi-Blast Respirator if air contaminants are not known, immediately dangerous to life or health, or you
cannot escape without respirator protective equipment. The supplied-air Abrasi-Blast Respirator configuration does not
afford respiratory protection if the air supply fails.
• Do not use the Combination Duo-Flo configuration of the Abrasi-Blast respirator in atmospheres containing less than
19.5 percent oxygen, in atmospheres exceeding the limits for which the filter will provide protection.
• When used in Combination Duo-Flo configuration, the respirator must be used in conjuction with the proper chemical or
particulate canister/cartridge(s) for protection against specific contaminants. If you cannot determine the filter
canister/cartridge(s) used with this device is designed for the contaminant, or if you do not know the identity of the
contaminant, do not use the device in the Combination Duo-Flo configuration.
• Do not use in Combination Duo-Flo configuration when concentrations of contaminants are unknown.
• Do not use in Combination Duo-Flo configurations when appropriate exposure limit (PEL, EL, TLV, etc) is not known.
• Do not use near flame or hot metal, because hood material may burn. The hood material is classified as self-
extinguishing as required by Federal Standard 191, Method 5910.
• Do not contact organic-based solvents which may attack the hood material, air-supply hose or other plastic
components. A partial list of such solvents is as follows:
○ Benzene
○ Methyl Ethyl Ketone (MEK)
○ Ethylene Dibromide
○ Tetrahydrofuran (THF)
○ Ethyl Acrylate
○ Acetonitrile
○ Isobutyl Amine
○ Petroleum-Based Solvents
• Return to a safe atmosphere and discard the respirator immediately if discoloration, crazing, blistering, cracking or other
deterioration of the hood material, air-supply hose or other plastic components is observed.
• Do not wear eyeglasses under the facepiece. The temples or sidebars on eyeglasses will prevent an air-tight seal. If you
must wear eyeglasses, install the spectacle kit.
Failure to follow these warnings can result in serious personal injury or death.
5.1 Changing Cover Lenses
The outer cover lens should be removed when it gets dirty or scratched. To change the cover lens, grasp one of the pull-tabs on
the corners of the lens and pull straight out. The last protective lens in the cartridge has no pull-tab. It is to be kept over the
primary lens to protect its surface from abrasive materials.
NOTICE
Do not remove a lens cartridge during abrasive work. The primary lens may be polycarbonate and will scratch easily. If the
primary lens is damaged, the entire lens housing assembly must be replaced.
US Abrasi-Blast Respirator 20
5 Using the Respirator