Positive pressure air breathing apparatus must contain air, and it is clean and pure air after compression. Generally, when inflating, it will choose a place with good air to inflate. Positive pressure air respirator can not contain oxygen, oxygen has a simple oxygen respirator. So you can't use a positive pressure air respirator.
And the positive pressure air breathing apparatus has a pressure value, if the oxygen pressure value is not the same, it can not accurately know how much pressure is inside, so it is easy to appear dangerous, so in order to avoid dangerous situations, the positive pressure air breathing apparatus must not be loaded with oxygen.
compressed air
Air breathing apparatus, as the name suggests, is to breathe air. The cylinder of the positive pressure air breathing apparatus is filled with compressed air, which is the air in the atmospheric environment that we are breathing normally, and the air is filled into the cylinder by the pressure booster of the high-pressure compressed air inflator. Under normal circumstances, the air filled by the positive pressure air respirator is colorless, odorless and without much water vapor, if it has a taste or is not clean, it is certainly not normal, and it is not good for the human respiratory tract, at this time we need to check the gas cylinder and air compressor inflation problem.
It is compressed air that has been purified and dried.