Principle of The demand valve:

There is big diaphragm valve inside as the self-balancing system, automatically tracking users’ breathing actions, provide the on-demand supply and ensure that pressure inside the mask higher than external environment.

The square manual turnoff button in front of demand valve can turn off the demand valve against the outputting air flow to stop air supply. And it will automatically starts by the suction at inhalation.

At the bottom is the manual force air supply button, it can automatically supply air when press this button if manual shut-off button fails, secondly, once users do not feel the air supply sufficient and touch this, air flow output will be increased automatically. In addition, it allows the out flux of some not-used-up air pressure in medium pressure hose thus to easily check and disassemble the quick connector.

Features of The Demand Valve:

• Streamline design with elegant appearance and no hindrance in vision.
• Manual turnoff valve easy to operate.
• Comfortable breath with little resistance.
• Simple operation and convenient use.
• Ensure large flow and safe air supply by using manual force air flux button.
• The shell adopts flame retardant and high-strength engineering plastics.