Filter installation and maintenance

Do not open the bag or film of all filters before the device. And according to the direction marked on the packing box to store the filter; In the transfer process, should be handled gently, gently, avoid violent oscillation and bump. In the process of transportation, equipment and operation, according to the requirements to ensure the operation. 

All kinds of filters in the use of a period of time, because the appearance of the filter material caught dust, so that the power and resistance of the filter decreased, affecting the cleanliness of the air supply, at the moment, the need to replace the filter in time. About the need for high humidity, high temperature environment in the hePA filter, it is necessary to select high temperature, high humidity resistance filter paper.

Do not open the bag or film of all filters before the device. And according to the direction marked on the packing box to store the filter; In the transfer process, should be handled gently, gently, avoid violent oscillation and bump. In the process of transportation, equipment and operation, according to the requirements to ensure the operation.

 All kinds of filters in the use of a period of time, because the appearance of the filter material caught dust, so that the power and resistance of the filter decreased, affecting the cleanliness of the air supply, at the moment, the need to replace the filter in time. As for the hePA filter that needs to be used in high humidity and high temperature environment, it is necessary to select filter paper, partition board and frame data that are resistant to high temperature and high humidity to meet the requirements of production.

Biological clean room and medical clean room, it is necessary to choose the filter of metal frame, and its appearance should not be easy to rust. Do not allow the use of wood frame board filter, in case of bacteria, affect the qualified rate of the product. 

About the above filter, it is assumed that there is a differential pressure gauge or differential pressure sensor before and after the filter, then for the coarse effect filter, when the differential pressure value is greater than 250Pa, it is necessary to replace; For the medium effect filter, the pressure difference is greater than 330Pa, it is necessary to replace; when the pressure difference value is greater than 400Pa, it is necessary to replace, and the original filter can not be reused; For hepa filters, when the filter resistance value is greater than 450Pa; or when the air flow speed on the air outlet surface falls to the low limit, even after replacing the coarse effect and medium effect filter, the air flow speed can not be increased; Or when the hePA filter surface appears irreparable leakage, must be replaced with a new HEPA filter; If there are no above conditions, it can be replaced once in 1-2 years according to the application of environmental conditions. In order to give full play to the role of the filter, in the selection and use of the process, the wind speed of the filter, coarse effect, medium effect filter should not be greater than 2.5m/s, sub-high efficiency filter and high efficiency filter should not be greater than 1.5m/s, which is not only conducive to ensure the power of the filter, can also extend the use of life filter, save money. 

Do not replace filters while the device is running. If the filter has reached the replacement period and cannot be replaced, it is only allowed to replace coarse and medium effect filters in the continuous fan condition; Sub-high efficiency filter and high efficiency filter must be connected to the air supply, can be replaced; The sealing gasket between the filter and the coupling structure must be tight and leak-free to ensure the filtering effect.