First, be sure to use a detailed inspection before
The first is to test the pressure of the gas source
First open the cylinder when in use, to see if it's high table, the standard required is 28 ~ 30MPa. If the gas shortage, it should go inflated before use, during use.
The second fire service as a whole to detect the closed nature of
Open the cylinder valve switch, observe the pressure gauge readings, wait for a while in turn it off. 5min pressure drop is less than 4MPa, indicating that the system airtight well. This process shall supply valve and the bypass valve is closed.
Third, we must detect fire service alarm device
After opening the cylinder control switch, wait a little longer in turn it off. Slowly turn the valve by hand, the purpose of doing so is to let it slowly exhaust, observe the pressure gauge pointer if there is decreased, when the pressure is reduced to 4 ~ 6MPa, the alarm should be issued whistles alarm signal.
The fourth round
fire hood to check air tightness
Wear full face mask user's hand, with his palm at the interface block mask, breathe deeply a few times and feel the tightness of this mask is good.
The fifth is to detect the gas supply valve case
Open the cylinder control switch, and then take a good mask, full face mask in the valve insert inside. Use the force of breath, hear and snapped, gas supply door open. Users repeated several times to ensure their own safety, but also to use it to play a real role.
Second, the periodic inspection
According to the above detecting step, the detection of the various parts in detail. Check the air bottles, is not in the pressure range is very flexible; expiratory hose if there are aging, damage phenomena; fire service if there are holes exist; whether other components within the validity period.
Testing individual components to ensure correct, before normal input use, before allowing users to work in safe mode which.