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Breathing Apparatus Gas Supply Valve SCBA Demand Valve
The demand valve provides air to the wearer demanding on the air breathing need of the water. It ensures a higher air pressure inside the face mask than the outside pressure.
The demand valve can be manually switched off thanks to the switcher on the top of the valve, and then no air is provided to the face mask. The demand valve is automatically switched on at the first inhalation of the wearer.
At the central bottom of valve ,there is a manual control air supply button to be used to:
- Switch on the demand valve manually;
- Gave an additional breath of the wearer feels supply deficiency.
Besides, it can release the remaining air inside the medium pressure hose which is more convenient for test and disassembly of the quick connector.
Medium-pressure air through a hose connected with the valve was pumped to supply valve. For the valve can guarantee to provide low pressure air to the mask.
Additional gas supply and pressure relief button for non-switching by inhalation directly to the face mask in a constant supply of reserve gas supply security agencies, additional supply and pressure relief button is pressed, the system of sustainable gas supply or pressure relief. On the contrary that the bypass valve closed. Normal working hours do not need to press the button for additional gas supply and pressure relief.
It’s lightweight and the structure is compact.
It’s made of fire resistant material and fast connected with the mask throng spring button and express interface.
The gas supply valve is connected with the reducer through the medium pressure hose. When the user breath difficultly, they can press the red button "on" and the valve will increase the amount of gas to 450 L / min automatically (air supply valve will reach the amount of gas in 1/10 seconds).
Maximum gas supply: 450 L / min