Why do you have to find out the air volume and concentration of VOCs exhaust gas before putting on the roller shutter dust removal filter?

Why do you have to find out the air volume and concentration of VOCs exhaust gas before putting on the roller shutter dust removal filter? Roller curtain dust removal dry filters are an effective measure for pre-filtration of waste gas, which reduces the frequency and difficulty of replacing filter cotton and reduces the material of replacement of consumables…
