Breathing
air
requirements
7
CC20 Breathing air requirements
air Quality
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 3).
Supplied breathing air must AT MINIMUM meet the requirements
for Type 1 gaseous air described in the ANSI/Compressed Gas
Association Commodity Specification G-7.1 for Grade D or higher
quality as specified by Federal regulations 42 CFR, Part 84.141(b)
and 29CFR1910.134(i).
The requirements for Grade D breathable air include:
Oxygen............................................................................19.5-23.5%
Hydrocarbons (condensed)
in mg/m
3
of gas ........................................................ 5 mg/m
3
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
may normally have a slight odor. The presence of a pronounced
odor should render the air unsatisfactory.
Contact the Compressed Gas Association (1725 Jefferson Davis
Highway, Arlington, VA 22202) or www.cganet.com for complete
details on Commodity Specification G-7.1.
air Source
Locate the source of supplied air, whether it is a breathing air
compressor or an ambient air pump, such as a Bullard Free-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, and carbon monoxide
monitors and alarms, like the Bullard Series of CO monitors and
filters, as necessary for compressed air.
Compressed air should be regularly sampled to be sure that it
meets Grade D requirements.
CC20 Breathing air Pressure
Air pressure should be monitored at the point-of-attachment while
operating this respirator. A reliable air pressure gauge must be
present to permit you to monitor pressure during actual respirator
operation.
Special or Critical User’s instructions
The Breathing Air Pressure Table (see page 8) defines the air
pressure ranges necessary to provide CC20 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 flow control valve/climate control device (Column 2).
2. Be sure your Bullard air supply hose (Column 3) is approved for
use with your flow control valve/climate control device.
3. Determine that your Bullard air supply hose is within the
approved length (Column 4).
4. Make sure you have not exceeded the maximum 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 flow control valve/
climate control device, and air supply hose type and length.
CC20 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 adapters.
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 8).
The breathing tube connection fitting MUST be secured to the
belt that is supplied with this respirator. Securing the breathing
tube connection helps prevent the air supply hose from snagging,
disconnecting or pulling the respirator hood off your head.
WarNiNg
The CC20 respirator must be supplied with clean, breathable air,
Grade D or better, at all times. This respirator does NOT purify or
filter out contaminants. Failure to heed these warnings could result
in death or serious injury.
WarNiNg
Failure to supply the minimum required pressure at the point-
of-attachment for your hose length and CC20 respirator type
will reduce airflow and could result in death or serious injury.
Figure 3
Air Supply
Hose
Respirator
Grade “D”
Breathable
Air Source
Point-of-
Attachment**
Pressure
Gauge
** Use either a V13 hose-to-hose pipe adapter
or a quick-disconnect coupler to attach the
air supply hose.
CC20 Series airline respirator
User Manual
7