1.The main control parameters used in high-efficiency air filters are filtration efficiency,rated air flow,initial resistance under rated air flow,and dust holding capacity.
2.According to GB/T6165-1985"high performance air filter performance test method transmittance and resistance"test method,its transmission rate≤0.1%(ie,efficiency≥99.9%)or particle size≥0.1μm particles Filters with a count rate of≤0.001%(ie,an efficiency of≥99.999%)are high efficiency air filters.
3.High-efficiency air filter commonly used filters are ultra-fine glass fiber and so on.
4.The air filter shall meet the fire protection requirements.The high efficiency air filter shall be divided into three grades according to the fire resistance:a grade 1 filter.All materials of the filter shall be incombustible,and the incombustible material shall conform to GB8624-1997 Class A.The filter of grade 2 and filter should be incombustible material conforming to GB8624-1997 grade A.The divider plate and frame can be used with flammable materials conforming to GB8624-1997 grade B2.Level 3 filter,filter all materials available in line with GB8624-1997 B3 level
5 When designing,the initial resistance can be doubled as the final resistance,as the filter's calculation resistance.
6 The initial resistance of the HEPA filter must not exceed 10%of the resistance of the product sample.
7 High efficiency air filters should not be used alone.High efficiency air filters should be set at the end of the air conditioning system.
8 Capacity of dust should be provided by the manufacturer.High-efficiency filters should be leak tested at the factory.Other requirements are based on user requirements.
9 In a general non-parallel flow clean air-conditioning system,a combination of filter air outlets is used.