Clean operating room air filtration requirements
Release time:2015-12-15 source:
Clean operating room air filtration requirements
Clean room air filter theory
Cleanroom air inlet system will rely on airflow "piston" like squeezing into the airflow through the early effect of the filter, and then through the filter effect, then after efficient or ultra-high efficiency filter, clean room clean air pass so clean room air dust quickly achieve the appropriate cleanroom standards, and to clean indoor pollution discharge. To consider energy conservation, air pollution discharged after the return air, and then through efficient or ultra-high efficiency filter incoming clean rooms.
Press the filter performance (efficiency, resistance, dust holding capacity) to divide normally be divided into early effect, in effect, high school effect, sub-efficient, high efficiency (HEPA) and ultra-high efficiency (ULPA) filters six.
China's national standard "Air Filter" GB / T14295-93 in efficiency and resistance to specify different filters are as follows:
National standard "HEPA filter" GB13554-92 stipulated by the performance of the high efficiency filter is divided into A, B, C, D four categories. Class D and known as ultra-high efficiency filter (or called 0.1μm or ultra-high efficiency filter transmission filter).
Primary filter
Early effect filters are applied to air conditioning and ventilation systems primary filter, clean room return air filter, the local high efficiency filter pre-filter device, mainly used for filtration 5μm particle size of dust particles and above, using the weight method test. Also used in multi-stage filtration system primary protection. Non-woven filter material, nylon mesh, aluminum wave mesh, stainless steel net, non-woven filter media outlet side after finishing treatment, to prevent scattering of the nonwoven fiber breakage cause secondary pollution.
In effect filter
Efficiency air filter is suitable for high efficiency filter pre-filter, intermediate filtration air conditioning systems, as well as electronics, precision instruments, machinery, medicine, food and other industries of the air cleaning filter, mainly need to filter 1-5μm and more grain diameter dust particles and various suspended solids, with dust holding capacity, air volume, low resistance, reusable cleaning use features.
High efficiency filter
HEPA filter is suitable for the purification equipment and purification systems filter end, the ultimate filter clean room. HS efficient filter points have HEPA filter, HR ultra-low resistance without HEPA filter, HU ultra-efficient separator filter element, HT high temperature efficient filters and other products.