GR50 Respirator Assembly
Donning the GR50
GR50 Series Airline
Respirator User Manual
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WARNING
Do not put on or remove this respirator in a
hazardous atmosphere. Do not remove this
respirator in a hazardous atmosphere except
for emergency escape purposes.
Donning
Before using your GR50 Series respirator,
complete the assembly instructions provided on
pages 10-13.
1. Connect NIOSH-approved Bullard air supply
hose to air source supplying Grade D
breathable air. Turn on breathing air source.
2. With air flowing, connect breathing tube
assembly to air supply hose (see Figure 16).
Connect quick-disconnect fitting on breathing
tube assembly to quick-disconnect coupler
on air supply hose. Once fitting is secured,
release coupling sleeve to lock fittings
together. Pull on both hoses to make sure
they are attached securely.
3. Adjust air pressure at point-of-attachment
to within the approved pressure range (see
Figure 17). See the Breathing Air Pressure
Table (page 9) for approved pressure ranges.
4. With air still flowing, put on GR50 Series
respirator hood, inserting chin first.
5. Position headband or hard hat for a
comfortable fit. See instructions on page 10
for proper sizing.
6. If using an optional chin strap, pull elastic
strap under your chin and adjust for a secure
and comfortable fit.
7. Tuck inner bib of hood into shirt or protective
clothing for additional splash and overspray
protection (see Figure 18).
8. Pull respirator outer bib over collar of shirt or
protective clothing.
9. With breathing tube assembly attached to
the hood, fasten belt at waist or hip level and
adjust for comfort.
10. Recheck air pressure and adjust if necessary.
11. With air still flowing into your respirator,
you are now ready to enter work area.
Figure 18
Figure 16
Figure 17
Air Supply Hose
Point-of-attachment
Grade “D”
Breathable
Air Source
Pressure Gauge
14
15
Installing Breathing Tube Assembly
1. Remove nylon clamp from open end of
breathing tube (see Figure 12). Do not remove
foam from inside the breathing tube. The foam
helps reduce the noise level of incoming air.
2. Insert breathing tube approximately five
inches into hood’s air entry sleeve (see
Figure 13).
3. Install nylon clamp over air entry sleeve and
breathing tube, inserting clamp locks through
two holes in plastic anchorplate that is sewn
into hood (see Figure 14). Locks should face
away from user’s neck.
4. Engage clamp locks and squeeze together
until tight.
Using Climate Control Devices
GR50 Series respirators are approved by NIOSH
for use with four optional Bullard climate control
devices: AC1000 Series, DC50 Series, HC2400
Series and Frigitron® 2000 Series.
1. Follow the instructions supplied with your
climate control device.
2. Be sure to use only the Bullard breathing tube
approved for your climate control device (see
page 18).
3. Screw nylon hose connector on end of
breathing tube to hose thread on air
conditioner.
4. Firmly tighten hose connector by hand (see
Figure 15).
5. Lace belt supplied with respirator through belt
loop bracket on air conditioner.
Figure 13
Figure 12
To tighten
To remove
To tighten
Figure 14
Figure 15
