Clean room clean workshop purification system filter replacement cycle

The clean room has strict rules for the humidity, temperature, amount of fresh air, state, illumination, etc., to ensure the production quality of the product and the comfort of the working environment. The whole clean room system is equipped with a three-stage air purification system using primary, intermediate and filter filters, which controls the number of dust particles in the clean area and the number of settling bacteria and floating bacteria, etc. As the end filter device, the high efficiency filter determines the operation of the entire purification system, so it is very important to grasp the replacement time of the high efficiency filter.

A) Let's start from the high efficiency air filter, in the clean room, whether it is installed at the end of the purifying air conditioning unit, the high efficiency air filter is still installed in the high efficiency air supply outlet, these must have accurate operating time records and cleanliness and air volume as a replacement basis, such as in the normal use of the situation, the service life of the high efficiency filter can be Up to more than a year, such as front-end protection to do a good high efficiency filter life can be up to more than two years no problem, of course, this also depends on the quality of the high efficiency air filter, perhaps longer;

B) such as the high efficiency air filter installed in the purification equipment, such as the high efficiency filter in the automatic air shower, such as the front-end first effect filter protection to do a good high efficiency filter life can be up to two years or more; Such as purifying the high efficiency filter on the workbench, we can replace the high efficiency filter by the pressure difference meter on the purifying workbench, and the high efficiency filter on the clean shed can determine the best time to replace the air filter by detecting the wind speed of the high efficiency air filter. If so, the replacement of high efficiency air filter on the FFU fan filter unit is to replace the high efficiency air filter through the prompt in the PLC control system or the prompt of the pressure difference meter.

C) Some of our experienced air filter installation personnel summed up the valuable experience, here to introduce to us, hoping to help you grasp the air filter replacement time more accurate, in the air conditioning unit when the differential pressure table shows that the air filter resistance reaches 2 to 3 times the initial resistance, should suspend maintenance or conversion of the air filter.

In the absence of a differential pressure meter, you can choose whether to demand conversion according to the following simple dual format:

1) Check the color of the filter material on the inferior side of the air filter, such as the color of the filter material on the outlet surface becomes black.

2) Contact the air filter outlet filter material by hand, if there is more dust on the hand, prepare to convert;

3) Repeatedly record the conversion status of the air filter and summarize the appropriate replacement cycle;

4) Under the premise that the high efficiency air filter does not reach the final resistance, the pressure difference between the clean room and the adjacent room decreases significantly, which may be that the junior high efficiency filtration resistance is too large, and it is necessary to prepare for conversion;

5) The cleanliness of the clean room does not meet the design requirements, or there is negative pressure, when the middle school efficiency air filter does not arrive at the conversion time, it may be that the high efficiency air filter resistance is too large, to prepare for conversion.