Air Source
Locate the source of supplied air, whether it is
a breathing air compressor or an ambient air
pump, in a clean air environment. Locate the air
source far enough from your work site to ensure
the air remains contaminant-free. Always use an
inlet filter on your air source.
Use suitable after-cooler/dryers with filters,
carbon monoxide monitors and alarms as
necessary to assure clean, breathable air at
all times.
The air should be regularly sampled to be sure
that it meets Grade D requirements.
Breathing Air Pressure
Air pressure must be continually monitored at
the point-of-attachment while operating this
respirator. A reliable air pressure gauge must be
present to permit you to continually monitor the
pressure during actual respirator operation.
�
WARNING
FAILURE TO SUPPLY THE MINIMUM REQUIRED
PRESSURE AT THE POINT-OF-ATTACHMENT
FOR YOUR HOSE LENGTH AND TYPE WILL
REDUCE AIRFLOW AND MAY EXPOSE YOU TO
LIFE-THREATENING CONDITIONS, DISEASES
OR DEATH.
The Breathing Air Pressure Table (see page 9)
defines the air pressure ranges necessary to
provide GR50 Series respirators with a volume
of air that falls within the required range of
6-15 cfm or 170-425 lpm (Ref. 42 CFR, Part 84,
Subpart J, 84.150).
Make sure you understand the information in the
Breathing Air Pressure Table before using this
respirator.
1. Determine the type of air source you are using
(Column 1), then find your breathing tube
assembly (Column 2).
2. Be sure your Bullard air supply hose(s)
(Column 3) is approved for use with your
breathing tube assembly.
3. Determine that your air supply hose is within
the approved length (Column 4).
4. Make sure you have not exceeded the maxi-
mum number of hose sections (Column 5).
5. Set the air pressure at the point-of-attachment
within the required pressure range
(Column 6) for your breathing tube assembly,
and air supply hose type and length.
Breathing Air Supply Hoses
and Hose Fittings
NIOSH-approved Bullard air supply hose(s)
MUST be used between the breathing tube
connection fitting on the wearer’s belt and the
point-of-attachment to the air supply.
NIOSH-approved Bullard quick-disconnect
fittings MUST be used to connect V5 or V20 hose
lengths together. When connecting lengths of
V10 hose, only use Bullard V11 hose-to-hose
adaptors. Secure connection(s) until wrench-
tight and leak-free. Total connected hose length
and number of hoses MUST be within the ranges
specified on the Breathing Air Pressure Table
(see page 9) and the respirator’s NIOSH approval
label (see page 1).
The breathing tube connection fitting MUST be
secured to the belt that is supplied with this
respirator. Securing the air entry connection
fitting helps prevent the air supply hose from
snagging, disconnecting or pulling the respirator
hood off your head.
GR50 Series Airline
Respirator User Manual
GR50 Protection
GR50 Air Source
8
9
Protection
Respiratory
This respirator is NIOSH approved (TC-19C-329)
for Type C operations. It can be worn for general
purpose applications, including grinding.
This respirator is not approved for use in any
atmosphere immediately dangerous to life or
health (IDLH), or from which the wearer cannot
escape without the aid of the respirator.
Head
The GR50 Series respirator hood with the 20TG
or 20RT headband DOES NOT provide head
protection. If head protection is required, order
a Bullard hard hat model C30 or S51.
Respirator hoods used in conjunction with
Bullard C30 or S51 hard hats meet ANSI
Standard Z89.1-2003, Type I, Class E &
G requirements for protective headwear for
industrial workers. These hard hats are
designed to provide limited head protection by
reducing the force of falling objects striking the
top of the hard hat shell.
Face
The GR50 Series respirator hood meets ANSI
Z87.1-2003 impact and penetration requirements
for face protection. The .040 polycarbonate
lens provides limited face protection from flying
particles or spray of hazardous liquids, but is not
shatterproof.
Eyes
GR50 Series respirators DO NOT provide eye
protection. Wear approved safety glasses or
goggles at all times.
Ears
GR50 Series respirators DO NOT provide
hearing protection. Use properly fitted earmuffs,
earplugs or other protection when exposed to
high noise levels.
Breathing Air Requirements
Air Quality
�
WARNING
This respirator must be supplied with clean,
breath-able air, Grade D or better, at all
times. This respirator does NOT purify or filter
out contaminants.
Respirable, breathable air must be supplied to
the point-of-attachment of the approved Bullard
air supply hose. The point-of-attachment is the
point at which the air supply hose connects to
the air source. A pressure gauge attached to the
air source is used to monitor the pressure of air
provided to the respirator wearer (see Figure 2).
Supplied breathing air must AT LEAST meet the
requirements for Type 1 gaseous air described
in the Compressed Gas Association Commodity
Specifications G-7.1 (Grade D or higher quality),
as specified by Federal Law 42 CFR, Part 84,
Subpart J, 84.141 (b).
The requirements for Grade D breathable
air include:
–Oxygen ...............................................19.5-23.5%
– Hydrocarbons (condensed) in mg/m3 of gas
..................................................... 5 mg/m3 max.
–Carbon monoxide ............................ 10 ppm max.
–Carbon dioxide ........................... 1,000 ppm max.
–Odor ..................................................................*
– No toxic contaminants at levels that make air
unsafe to breathe.
* Specific measurement of odor in gaseous air
is impractical. Air normally may have a slight
odor. The presence of a pronounced odor
should render the air unsatisfactory.
Contact the Compressed Gas Association (1235
Jefferson Davis Highway, Arlington, VA 22202)
for complete details on Commodity Specifications
G7.1.
Figure 2
Air Supply Hose
Point-of-attachment
Grade “D”
Breathable
Air Source
Respirator
Pressure Gauge
