•
Replace the cylinder
8.3
After Use
•
Close the cylinder(s) valve(s)
•
Doff the mask. Excess air will be vented off.
•
Press button (17) to lock valve and have it ready for next use.
9.
MAINTENANCE
9.1
Cylinder
For recharging and retesting national regulations and specific instructions of the cylinder producer shall be
followed.
In general:
•
It is allowed to exceed filling pressure by not more than 10% since when the cylinder cools down, the
pressure will become the nominal working pressure.
•
Air meets the requirements of EN 12021
•
The date of last pressure test is engraved onto the cylinder
Cylinder valve has to be kept shut whilst being sent to refilling to avoid moisture from entering it. Cylinder
shall be protected from shocks during transport and storage. Do not carry cylinders by the hand wheel
valve.
9.2
Cleaning and disinfecting
The demand valve can be washed in lukewarm soapy water and rinsed with fresh running water.
10. TESTING
N.B.: The following tests shall in any case be performed after cleaning or repairs.
The Demand valve membrane as well as all rubber parts shall be replaced if they show signs of alteration or
ageing (sticky, hardened, creased etc.). All fittings shall be free from evident alteration.
SPASCIANI SPA supply on request the equipment for proper testing, which is held in two handy cases.
In the following paragraphs some of the tests that can be carried out with such an equipment are described.
10.1 Demand valve tightness at +7 mbar
• Connect cylinder to pressure reducer. Cylinder shall be kept shut.
• Connect the demand valve to the medium pressure line
• Release button (17) by pushing on rubber button (4)
• Connect the demand valve to the testing instrument
• Pump some air into the demand valve to reach a pressure of some +7 mbar. Pressure drop shall not
exceed 1 mbar within one minute.
10.2 Positive pressure of the demand valve
• Open cylinder valve.
• Connect demand valve to testing equipment.
• Release button (17) by pushing on rubber button (4)
• The control pressure gauge shall read 3.2 to 3.9 mbar.
10.3 Pressure in the cylinder
See par. 7.4
10.4 Tightness of the high pressure section
See par. 7.5
10.5 Warning device
See par. 7.6
11. STORAGE
It is advisable to store the respirators herein described in suitable areas at normal room temperature, away
from sun light, humidity and corrosive chemicals.
Dry and clean breathing apparatus can be stored in special dust free cabinets.
12. SCHEDULED MAINTENANCE TABLE
The following table shows the maintenance schedule
19