All kinds of filters are not allowed to open the packaging bag or packaging film before the equipment; the filters shall be stored in the direction indicated on the packaging box; during the transfer process, they shall be handled with care to avoid violent oscillation and collision. In the process of transportation, equipment and application, it should be carried out according to the requirements to ensure the application effect. After being used for a period of time, the power and resistance of the filter are reduced due to the dust collected on the surface of the filter material, which affects the cleanliness of the air supply. At this moment, the filter needs to be replaced in time. It is necessary to select high temperature and humidity resistant filter paper for high humidity and high temperature environment.



All kinds of filters are not allowed to open the packaging bag or packaging film before the equipment; the filters shall be stored in the direction indicated on the packaging box; during the transfer process, they shall be handled with care to avoid violent oscillation and collision. In the process of transportation, equipment and application, it should be carried out according to the requirements to ensure the application effect. After being used for a period of time, the power and resistance of the filter are reduced due to the dust collected on the surface of the filter material, which affects the cleanliness of the air supply. At this moment, the filter needs to be replaced in time. It is necessary to select high temperature and high humidity resistant filter paper, separator plate and frame materials for high humidity and high temperature high efficiency filter to meet the requirements of production. It is necessary to select metal frame filter in biological clean room and medical clean room, and its appearance is not easy to rust. It is not allowed to use the filter with wooden frame to prevent bacteria from affecting the qualified rate of products. For the above filters, if there is a differential pressure meter or differential pressure sensor before and after the filter, it is necessary to replace the coarse efficiency filter when the differential pressure is greater than 250pa; for the medium efficiency filter, it is necessary to replace when the differential pressure is greater than 330pa; for the sub high efficiency filter, it is necessary to replace when the differential pressure is greater than 400pa, and the original filter can not be reused; As for the high efficiency filter, when the resistance value of the filter is greater than 450pa, or when the air flow velocity on the outlet side drops to the lowest limit, even if the coarse efficiency and medium efficiency filters are replaced, the air flow velocity still can not increase, or when the appearance of the high efficiency filter cannot be repaired, the new high efficiency filter must be replaced; If there is no such condition, it can be replaced once every 1-2 years according to the environmental conditions. In order to give full play to the role of the filter, in the process of selection and application, the face-to-face wind speed of the filter should not be greater than 2.5m/s for the coarse and medium efficiency filters, and 1.5m/s for the sub high efficiency filter and high efficiency filter. This is not only conducive to ensuring the power of the filter, but also can extend the service life of the filter and save the cost; If the filter can not be replaced due to the expiration date of replacement, it is only allowed to replace the coarse and medium efficiency filter under the condition of continuous fan; the sub high efficiency filter and high efficiency filter can be replaced only after the air supply is necessary; the sealing gasket between the filter and the connecting structure is necessary to be tight without leakage to ensure the filtering effect.