The primary filter is suitable for the primary filtration of air conditioning systems and is mainly used to filter dust particles larger than 5μm. The primary filter has four styles: plate type, folded type, frame type and bag type. The outer frame materials include paper frame, aluminum alloy frame, galvanized iron frame and stainless steel frame. The filter materials include non-woven fabric, nylon mesh, activated carbon filter material, metal mesh, etc. The protective nets include double-side

Daily maintenance and care methods for air filters During the transportation and movement of the filter, handle it with care and avoid any violent collision or vibration. Second, special attention should also be paid to the installation of high-efficiency filters. The installation direction must be correct. There should be no leakage, deformation, damage or glue leakage in the connection between the filter and the frame. After the filter is installed, the inner wall must be cleaned.

With the promotion of lean-meat pigs in the pig farming industry and the improvement of modern pig farming techniques, higher requirements have been put forward for the design and construction of pig houses, among which ventilation in pig houses is an important technical process. Good ventilation design can not only provide pigs with comfortable environmental conditions, improve the health and production level of the pig herd, and reduce the occurrence of diseases, but also lower the cost of fee

FFU fan filter unit, referred to as "FFU", is a high-efficiency filter air outlet with its own blower (shellless fan), which together with its special keel system, pressurized fan, cooling coil, fresh air system and special lamps to form the FFU system. It is the combination of a fan and a filter (HEPA or UHPA filter) to form an end-of-line purification device that can be powered on its own. In the past, the air supply port of the high-efficiency filter with a fan, the self-purifier, and the lam