Technical Specification; Filter Selection - Sundstrom SR 90 Airline Instrucciones De Uso

2.4 Putting the facepiece on
Belt/control valve
• Put the belt on and adjust the length.
• Arrange the control valve in a way that allows easy adjustment
of the flow rate and a strict watch over the breathing hose, i e.
it must not be placed on the back of the waist.
Filter
Fit a suitable filter in the filter attachment. Fig. 1.
Mask – Tightness check
Check the fit of the mask if you intend to use a back-up filter:
•
Blank off the filter by using the sealing cover
• Put the mask on and
hold the facepiece firmly in place. Draw a
deep breath and hold your breath for ten seconds.
• If the mask is tight, it will be pressed against your face.
If any leakage is detected, check the inahalation and
exhalation valves, adjust the straps of head harness or
switch to alternative size of the respirator. Repeat the fit
check until there is no leakage.
Breathing hose/compressed air hose
• Connect the breathing hose of the facepiece to the control
valve outlet. Fig. 3.
• Unroll the compressed air hose and make sure that it is not
twisted.
• Connect the hose to the control valve inlet. Fig 4.
Mask – Fitting
• Put on the mask and adjust the head harness strap until the
mask fits well and comfortably. Fig. 5.
• The retainment clip on the breathing hose is ideal for
fastening the hose close to the body. Fig. 1:1a.
Airflow rate
• Use the control valve knob to set the air flow rate to suit your
current work intensity. Fig. 3. In the fully closed position (turn
the knob anti-clockwise), the flow is about 150 l/min. In the
fully open position (turn the knob clockwise), the flow is
about 320 l/min.

2.4.1 Filter selection

See the user instructions for the relevant filter.
2.5 Taking the facepiece off
• Remove the sealing cover, if fitted.
• Disconnect the compressed air hose from the control valve.
See below.
• Leave the polluted work area and take the equipment off.
Releasing the compressed air hose / breathing hose
Both couplings are of safety type and are released in two stages.
Fig 6.
• Push the coupling towards the nipple.
• Pull the locking ring back.
24
2.6 Warnings/limitations
Warnings
As a general rule, the user must always be able to retreat to safety
without risk if the air supply should cease or if he/she must take
off the equipment for some other reason.
The equipment must not be used
• If the ambient air does not have a normal oxygen content.
• If the pollutants are unknown.
• In environments that are immediately dangerous to life and
health (IDLH).
• With oxygen or oxygen-enriched air.
• If the user finds it difficult to breathe.
• If you can smell or taste the pollutants.
. Fig. 1:12. • If you experience dizziness, nausea or other types of discomfort.
• If the warning whistle sounds, which indicates that the air
supply is lower than recommended.
Limitations
• Anyone who wears a beard or sideboards cannot expect the
mask to be tight.
• A person working in an explosive or flammable environment
must follow any local regulations that may be in force for such
conditions.
• At very high work intensity, a partial vacuum may occur in
the equipment during the inhalation phase, which may cause
ambient air to be drawn in.
• Use of the equipment together with spiral hose SR 360 is
restricted to situations in which there is little risk of damage to
the hose and if the freedom of movement of the user can be
restricted.
• The air supply system should be equipped with an appropriately
rated and adjusted pressure relief safety valve.
• A risk assessment has to be done to avoid possible perilous
connections possible at the workplace, e.g. Nitrox.
• The SR 90 Airline is not approved for use with a mobile com-
pressed air system.

3. Technical specification

Working pressure
4–7 bar (400–700 kPa) measured at the connection to the
control valve.
Airflow rate
150 l/min to 320 l/min measured in the mask.
Manufacturer's minimum design flow: 150 l/min.
Materials
• Plastic parts are marked with the material code and recycling
symbol.
• The mask body and membrane are made of silicone.
Compressed air supply hose EC/CE
The following hoses are type approved together with all Sund-
ström compressed air fed equipment. Maximum working pres-
sure 7 bar.
• SR 358. 9.5/15 mm plastic hose made of PVC with polyester
reinforcement.
Resistent to oil and chemicals. 5–30 m.
• SR 359. 9.5/18 mm rubber hose made of EPDM with
polyester reinforcement. Antistatic and heat resistant. 5–30
m.
• SR 360. 8/12 mm spiral coiled hose made of polyurethane.
2, 4, 6 and 8 m.
Compressed air supply hose AS/NZS
Approved hoses must be used if Australian Standards approval is
to be valid. Hoses from 5–30 m or coupled to 90 m may be used.