SCBA

SCBA test and requirements ?

Visual Checks, content test, leak test, low level alarm, gas tightness, positive pressure test
1) Visual checks: Check condition of mask (facepiece, head harness & lens for cuts, scratches, missing buckles), backpack (straps & buckles for cuts, tears), cylinder (dents, gouges), hoses (cuts, cracks, bulges), SSD (damage,
debris).
2) Content test: Turn off the black positive pressure knob on the demand valve. Open the cylinder valve to minimum and check the shoulder mounted pressure gauge it must show the full.
3) Leak Test:
After opening the cylinder valve once the system pressurised close cylinder valve and observe the pressure gauge that should not drop. If the pressure in the system drops 10bar/min the set must not be used for operation.
Soap test the detected leak:
If any leak observe in the pressure hose to identify the leaks the hose can be immersed in the water or spray soap water for the same.
4) Low Level Alarm: Gradually forces allow the pressure to drop in the system by demand valve slowly the whistle should blow when the pressure reaches at red zone at about 44bar.
5) Check the face mask for gas tight:
Close the cylinder valve and continue breadth until the air in the system is exhausted. Once the reading on the gauge shows zero hold the breadth for at least 10 sec. Any leaks will be heard by noise or shown by the mask moving away from the face, if leak is detected turn on the cylinder valve and re-adjust.
6) Positive Pressure Test:
a. With the pressurized airline connection attached to the SCBA, hold your breath for a moment and listen for any unusual sounds from the system or air leaking from the pressure demand valve. If any unusual noises are heard, do not use the unit. Immediately remove the unit and tag for service.
b. Put to positive mode, continue normal breathing and insert two fingers between the side of your face and the face piece.
c. Gently lift the face piece seal away from your face until there is a good outward flow of air, showing that the face piece pressure is positive.
FSS code – SCBA should 1200 litres of air capable of functioning for at least 30 mins