What happens when a simple respirator doesn't press?

Explain that the oxygen storage valve is normal. According to the inquiry, the simple respirator continues to supply oxygen without squeezing the balloon, and excessive oxygen overflows from the oxygen storage safety valve, indicating that the oxygen storage safety valve is normal. Simple respirator is a kind of first aid equipment, which is used to provide simple artificial respiration support when professional respiratory treatment cannot be obtained immediately. It consists of a mask, an airbag and a breathing tube.