When I went to the drugstore to buy masks a few days ago, I saw that some masks have breathing valves and some do not. I would like to ask what the function of the breathing valve is? How to open the breathing valve of the mask?
The role of the breathing valve of the mask
In working environments that are hot and humid, have poor ventilation, or have a heavy workload, using an anti-smog mask with a breathing valve can help you breathe out It is more comfortable, but the mask with a breathing valve only provides one-way protection, only protecting the person wearing the mask, but not the people around the person wearing the mask. It is mainly used in industrial dust masks and anti-smog masks, and is not suitable for Medical institutions. If an infectious person wears a mask with a breathing valve, the surrounding people are still at risk and have no protective effect.
How to open the breathing valve of the mask
When exhaling, the positive pressure of the exhaust gas blows the valve open to quickly remove the waste gas from the body and reduce the stuffy feeling when using the anti-haze mask. The negative pressure during inhalation will automatically close the valve to avoid inhaling pollutants from the external environment.
Number of uses of breathing valve masks
Masks are usually disposable. Unless the filter element can be replaced, they can be used multiple times. The filter material inside is also disposable. Generally Wearing time is within 8 hours.
However, under special circumstances, in most life scenarios, such a mask can be used two to three times, but it is not recommended to be used n times.
For example, take a walk inside and outside the community. Under these usage conditions, take off the mask after returning home, place it in a ventilated environment, let it dry naturally or dry the moisture in it, and prevent the accumulation of surface bacteria. It can be used by me again. Note: Disposable masks are not washable.
Is it better for a mask to have a breathing valve or not?
From a design principle, whether a mask has a breathing valve or not does not affect the protective effect of the wearer. However, wearing a breathing valve only protects the wearer, not those around them. It is recommended to use a mask without a breathing valve if possible.