1、 Classification of respiratory protective equipment
Classified according to protective purposes into three categories: dust prevention, gas prevention, and oxygen supply
According to the principle of action, it can be divided into two types: purification type and isolation type
According to the protective parts and the connection between the air source and the respiratory organs, it can be divided into three types: mask type, mask type, and mouthpiece type
According to the inhalation environment of personnel, there are two types: positive pressure type and negative pressure type
2、 Conditions for use of respiratory protective equipment
Insufficient oxygen supply in the air (less than 19.5% oxygen)
Containing harmful gases such as carbon monoxide, sulfur dioxide, and ammonia
Containing harmful vapors, such as those generated by volatile liquids
Containing harmful dust
Contain harmful fog and spray, such as fog generated by degreasing and painting
3、 Requirements for the use of respiratory protective equipment
Before entering the working environment: check if all components are intact and correctly worn
In the work area: Always wear it correctly. When feeling dizzy, nauseous, or smelling of pollutants, evacuate the work area immediately
Leaving work position: After arriving at a safe area, remove protective equipment; Clean protective equipment with neutral liquid; Dry naturally, pack in clean plastic bags, and place in designated areas
4、 Steps for Wearing and Using Protective Masks
Comfortably place the strap of the protective mask over the back of the head; Pull the lower tie back and cover the mask over the mouth and nose while pulling; Pull the lower lace up to the back of the neck, then hook it, pull the two sections of the lace up, and adjust the tightness; Adjust the position of the mask on the face to achieve the best wearing effect.
5、 After wearing the mask, please perform a negative pressure test as follows
Cover the circular opening of the filter box or filter cotton holder with the palm of your hand and gently inhale:
If the mask has a slight collapse and there is no air leakage between the face and the mask, it indicates that the mask is worn correctly.
If there is air leakage, the position of the mask on the face should be adjusted or the tightness of the tie should be adjusted to prevent improper fitting.
If the fitting cannot be achieved, please do not enter the contaminated area.