How to confirm the replacement cycle of HEPA filter

The clean room has strict regulations on the humidity, temperature, amount of fresh air, state, illumination, 
etc., to ensure the production quality of products and the comfort of the working environment of personnel. 
As the end filter device, the high efficiency filter determines the operation effect of the entire purification 
system, so how to confirm the replacement cycle of the high efficiency filter? Changrui Purification tell you!


1. In the clean room, whether it is installed at the end of the purified air conditioning unit or the air supply 
outlet, there should be accurate running time records and cleanliness and air volume as the basis for the 
replacement of high efficiency filters. Such as in the normal use of the case, the service life of the high 
efficiency filter can be up to more than one 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 filter.

2. The high efficiency air filter installed in the purification equipment, such as the high efficiency filter in the 
automatic air shower room, if the front-end initial effect filter protection is done well, its service life can be up 
to two years or more. The high efficiency filter on the purification workbench can be replaced by the pressure 
differential meter on the purification workbench, the high efficiency filter on the clean shed can determine the
 air filter replacement time by detecting the wind speed, and the FFU fan filter unit unit can be replaced by 
the PLC control system or the pressure differential meter.

3. When the differential pressure meter shows that the resistance of the air filter reaches 2 to 3 times the initial
 resistance in the air conditioning unit, the maintenance should be suspended or the air filter should be 
replaced.

Changrui Purification 13 years focus on the production and service of air filters, the main products include air
 filter series of initial effect air filter, medium effect air filter, high efficiency air filter products (such as paper 
frame, medium effect products, aluminum frame plate can be cleaned, medium effect bag series, painting 
courtyard cotton series, dust collection equipment, Filter cylinder series for environmental protection 
equipment, activated carbon filter products, high efficiency with partition, high efficiency without partition, 
fan filter unit (FFU) products, etc.).