1. Filtering accuracy:
Refers to the large diameter of impurity particles that are allowed to pass through. The key to affecting filtration accuracy is the filter element. Different filter elements can be selected according to the needs of subsequent components to achieve the corresponding filtration accuracy.
2. Flow characteristics:
It refers to the relationship curve between the air flow rate through the filter and the pressure drop at both ends of the filter under a certain inlet pressure. In actual use, it is selected within the range of pressure loss less than 0.03MPa. In air filters, the main factors affecting flow characteristics are the body and filter element.
3. Water splitting efficiency:
The ratio of separated moisture to the moisture content in the air at the inlet. It is generally required that the water separation efficiency of the air filter be not less than 80%. The main factor affecting the water separation efficiency is the guide plate.
Air filters have different filtration efficiencies when measured with different concentrations.
(1) The dust concentration in the weight efficiency is expressed in mass concentration (g/m3)
(2) The counting efficiency of dust concentration is expressed in counting concentration (pc/L)
(3) The sodium flame efficiency uses solid sodium chloride particles as the dust source. Measure the concentration of sodium chloride particles using a photoelectric flame photometer. The sodium flame efficiency is equivalent to the counting efficiency.
4. Filter resistance:
The resistance of a new filter at the rated air volume is called the initial resistance; The resistance when the dust capacity of the filter reaches a sufficient level at the rated air volume and requires cleaning or replacement of the filter material is called the final resistance.
5. Dust capacity of the filter:
When the resistance of the filter reaches the final resistance at the rated air volume, the total mass of dust particles it accommodates is called the dust capacity of the filter.