Breathability of bag air duct

Breathability of bag air duct Understand the bag air duct permeability and permeability    1，what does the bag air duct permeability mean? The main component of fabric bag air duct is made of special material-polyester fiber, and the permeability is equal to the air permeability of ordinary fabric, the pressure in the duct is 125Pa, when the air permeability of 1 square meter surface area of fabric bag air duct reaches 1 CFM (1 CFM = 1.68 M3H) , the air permeability of the bag air duct is 1 Ch/t 2. The conversion unit can be obtained as follows: 1 CFM/ft 2 = 18 m3/h/M 2, in our country, we usually reduce the unit“M 3/h/m 2” to“Mm/s”, so: 1 CFM/F 2 = 18 m 3/h/M 2 = 5 mm/s II, the importance of selecting the material of bag air duct,      2，one of the characteristics of the bag air duct is that the air volume of the equipment through the bag air duct transmission into the working area, there are two ways: first, through the infiltratio…