MSA Abrasi-Blast Series, Инструкция по эксплуатации

Страница: 8 / 24

8
TAL 201 (L) Rev. 1 - 818366
B. Combination Duo-Flo Type
Respirators
1. Be sure that inlet air pressure is
set to agree with the valve-con-
nector you are using. Use the
information below as a guide.
The air source must provide at least
4 cubic feet per minute (cfm) to
each respirator, and maintain an
inlet pressure within the range of 35
- 40 psig. If the air supply pressure
is greater than 40 psig, be sure to
use a pressure regulator between
the air supply and air-supply hose.
Adjust the regulator to deliver air at
40 psig. Failure to follow precau-
tions can result in serious personal
injury or death.
2. Reconnect the socket assembly to
the Duo-Flo valve.
3. Slide the Duo-Flo valve belt clip
over the support belt. Don the
support belt and position the Duo-
Flo valve so that it will be on your
left side. Attach the appropriate fil-
ter or canister to the coupling nut
at the bottom of the Duo-Flo valve.
Remove the canister bottom seal.
4. Turn the air supply on. Check for
leaks with a commercial leak
detection solution or soapy water.
Tighten connections as required.
Disconnect the socket assembly
from the Duo-Flo valve. If the air-
line is to remain in a contaminated
atmosphere, this leak test should
be performed on respirators used
for the first time and periodically
to maintain the respirator in good
working condition.
5. Connect the breathing tube to the
opening at the top of the Duo-Flo
tube.
6. Turn the back of the hood and
collar “wrong-side-out,” exposing
the facepiece headstraps. The
Velcro strip on the collar does not
have to be unfastened unless a
protective cap is worn.
7. Adjust the facepiece headstraps
so the end tabs are at the buckles.
8. Grip the facepiece between your
thumb and fingers with both
hands. Insert your chin into the
lower part of the facepiece. Pull
the facepiece headstraps over
your head. Smooth the straps flat
against your head.
a. Support the facepiece by hold-
ing the breathing tube at the
coupling nut assembly with
one hand.
b. Tighten the lower (neck) straps.
Pull the straps straight back,
not out.
c. Tighten the side (temple) straps.
d. Tighten the front (forehead)
strap to position the lens for
best vision and to support the
facepiece weight.
C. Air Tightness Test (Face-to-
Facepiece Seal)
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 compro-
mises the face-to-facepiece seal in
any way, wear the breathing tube
on the outside of the hood only.
1. Supplied-Air Type Respirators Only:
Place the palm of your hand firmly
over the breathing tube coupling
nut or place your thumb over the
breathing tube opening inside the
coupling nut.
2. Combination Type Respirators Only:
Place your hands tightly over the
inlet(s) of the filter or canister.
3. Inhale gently so that the facepiece
collapses against your face. Hold
your breath for 10 seconds.
4. The facepiece should remain col-
lapsed if the seal is air-tight.
5. If the facepiece does not remain
collapsed, readjust the head har-
ness straps and re-test.
6. 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 Maintaining the
Respirator, page12. Locate the
problem and correct before using
the respirator.
This device may not seal properly
with your face if you have a beard,
gross sideburns or similar physical
characteristics (see ANSI Z88.2-
1980). An improper facial seal may
allow non-respirable air to leak into
the facepiece, reducing or eliminat-
ing respiratory protection. If such
conditions exist, YOU, the user,
assume all risks of respiratory
injury or death which may result.
The face-to-facepiece seal must be
tested before each use.
Donning
DUO-FLO 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
818366_a.qxd 1/24/02 3:18 PM Page 8