Page 8 of 44
P/N 595189-01 Rev A 4/10
6
A Guide to Industrial Respiratory Protection, HEW Publication Number (NIOSH)
76-189, John A. Pritchard (US. Dept. of Health Education and Welfare), p. 13.
WArning
do noT uSe oxygen! SuPPlying The
reSPirATor WiTh oxygen mAy cAuSe
SicKneSS or mAy cAuSe A fire or ex-
PloSion reSulTing in SeriouS inJury
or deATh.
WArning
The Air SuPPly PreSSure muST remAin
beTWeen 80 PSig And 115 PSig WiTh SuiT-
Able floW AT All TimeS during uSe. if
The Air SuPPly doeS noT mAinTAin
T h e S e r e Q u i r e m e n T S , T h e r e S P i -
rATor mAy noT Provide AdeQuATe
ProTecTion from The hAZArdouS
ATmoSPhere Which mAy reSulT in
SeriouS inJury or deATh.
WArning
The Air SuPPly muST be free of con-
denSed moiSTure. Air regulATorS, by
Their nATure, become cold during
uSe And cAn cAuSe moiSTure in The
Air SuPPly To freeZe even AT AmbienT
TemPerATureS Well Above 32° f / 0°
c. froZen moiSTure in The Air SuPPly
mAy reSulT in PArTiAl or comPleTe
fAilure of The reSPirATor Which mAy
cAuSe SeriouS inJury or deATh.
Air SuPPly SySTem reQuiremenTS
When the respirator is used as a Type C supplied air respirator IT
IS THE RESPONSIBILITY OF THE ORGANIZED RESPIRATORY
PROGRAM UNDER WHICH THE RESPIRATOR IS USED TO PRO-
VIDE A SUPPLY OF AIR THAT IS KNOWN TO BE CLEAN AND
SAFE FOR BREATHING AND TO ENSURE THAT ALL OTHER
REQUIREMENTS OF THE BREATHING AIR SUPPLY SYSTEM
STATED BELOW ARE MET.
To use the SKA-PAK AT combination respirator as a Type C supplied-
air respirator, it must be connected to a suitable supply of clean
breathing air through one or more segments of air supply hose. The
air supply system must supply air containing no less than 19.5 percent
oxygen and meeting the Grade “D” requirements of the Compressed
Gas Association (CGA) Commodity Specification for Air G–7.1 avail-
able from the CGA, Inc. 1235 Jefferson Davis Highway, Arlington,
Virginia, 22202.
In addition, the air must be dry, TO A DEW POINT OF -65°F / -54°C
OR LOWER. If the breathing air is not dry, water may condense on the
inside of the air supply lines or inside the respirator. In temperatures
at or below freezing, +32°F / 0°C, the condensation may freeze inside
the air supply lines or inside the respirator, possibly causing the flow
of breathing air to be reduced or to stop completely.
noTe
THE AIR USED IN THE AIR SUPPLY CYLINDER ON THE RESPIRA-
TOR IS ALSO REQUIRED TO BE DRY TO A DEW POINT OF -65°F
/ -54°C OR LOWER.
The user’s breathing air volume requirement will vary depending on
the activity being performed. The volume of air needed, expressed in
liters per minute (lpm) at 1 atmosphere pressure, may range from less
than 20 lpm when at rest to over 60 lpm during heavy work.
6
The air supply system must have the capacity to meet the user’s
volume requirement for respiration while maintaining the required
supply pressure of no less than 60 psig and no more than 125 psig
at the point of attachment of the respirator airline connection hose
to the air supply system. If the pressure in the air supply system
can exceed 125 psig, the air supply system shall be equipped with
a pressure-release mechanism that will prevent the pressure at
the point of attachment of the hose to the air supply system from
exceeding 125 psig.
The coupling installed on the air supply system must match both the coupling
installed on the supply hose and the coupling installed on the airline connec-
tion hose. The correct coupling must be directly installed on the air supply
system. Adapters shall not be used. The couplings and fittings that
mate with the couplings used on SCOTT air supply hose are available
from SCOTT or from the coupling manufacturer. To determine what
couplings are required, locate the SCOTT part number stamped on
the end of the Airline Connection Hose Assembly located in the waist
belt of the respirator. Refer to Table 2 on Page 29 of this instruction
to determine the manufacturer and series number of the couplings.
The SKA-PAK PLUS combination respirator is NIOSH certified only
when used with one of the types of hose with which it has been tested
and approved. The types of hose are:
SCOTT 30010-Series air supply hose
• SCOTT 26370-Series air supply hose
• SCOTT 200820-Series air supply hose
• SCOTT 803904-01 air supply hose.
• SCOTT 30020-Series air supply hose and
• SCOTT 26369-Series air supply hose
