After adjustments to the production process, chemical filtration targets, inlet loads, and air paths should be rechecked. Just because the original filter element can still be installed and the fan is still running does not mean that the media is still suitable for new materials or gases generated by new operations. As the process changes, the filtration requirements often change as well, but the changes may not necessarily appear immediately.

Process adjustment changes the gas list

There are many forms of process adjustment: changing cleaning agents or solvents, adjusting formulas, changing temperature or production capacity, adding new equipment, and adjusting exhaust methods. These changes first affect the gas composition and concentration in the air, rather than the physical size of the filter element. If the bill of materials based on the original selection has changed, the target gas faced by the medium may be different from the original design. Some new ingredients may not be within the applicable range of the original medium, and the concentration of some ingredients may increase significantly, all of which need to be rechecked. If the filter element can be installed, it only means that the installation interface has not changed, but it does not mean that the gas mission has not changed.

Less smell does not mean less risk

A lighter odor after process adjustments sometimes reflects a change in composition rather than a reduction in load. Some components have a low olfactory threshold and can be smelled at very low concentrations; other components have an insignificant odor but may have an impact on equipment or products. If you only judge the filtration needs based on smell, it is easy to mistake 'can't smell' as 'no problem'. The basis for judgment should be the target gas list and corresponding detection data, rather than sensory changes. For investigation methods of differences in odor and ingredients, please refer toThe indoor odor is different from the fresh air entrance odor. How should I investigate?。

Air paths may also change with process adjustments

Process adjustments are sometimes accompanied by changes in equipment layout, exhaust mode, or air supply and return organization, and these changes can affect the propagation paths of contaminants. Putting new equipment downstream of the original filter section, changing local exhaust to indoor circulation, and adjusting partitions to connect adjacent areas may prevent the original effective filter section from covering new pollution paths. When reviewing, not only look at the gas composition, but also confirm whether the position of the filter section still corresponds to the main air path. To determine the source and path of pollution, please refer toHow to distinguish whether workshop pollution comes from outside or inside?。

Review should update the maintenance baseline

The review after process adjustment is not only to confirm whether the filter element can still be used, but also to update the replacement cycle and inspection schedule. New ingredients may consume capacity faster, and new operations may bring short-term peaks, which will affect filter life. During the review, relevant gases should be detected under new normal working conditions, the applicable scope of the filter material and system air volume should be checked, and the media type, filter section position or inspection frequency should be adjusted if necessary. If the original maintenance baseline continues to be used, the filter element may penetrate prematurely or be replaced excessively. Regarding the relationship between load changes and period adjustment, please refer toCan the cycle be extended after the chemical filter contamination load decreases?。

Aili industrial supporting equipment

For review after process adjustment, Aili Industrial generally recommends that customers look at the change list, new material information, and original filtration configuration together, and then decide whether to adjust the media, adjust the location, or adjust the maintenance schedule. Aili Industry can provide selection packages for box-type, flat-plate and V-type chemical filtration products. For box-type MAU packages, please refer toMAU box type chemical filter , product series can be viewedChemical filter product range . Device-side applications can useChemical filter FFU form, integrated chemical adsorption layer withHEPA/ULPA filter particle filtration, when the process adjustment involves the micro-environment of the equipment, the filter section configuration can be reviewed according to the new working conditions. The manufacturing end covers the independent research and development and production of motors and fans, control systems, sheet metal and complete machine assembly. The position of the filter section, air volume changes and resistance conditions can be rechecked in the same package, and non-standard structures can be adjusted according to the new layout. The specific gas effect, applicable environment and replacement cycle still need to be verified based on the corresponding configuration data and on-site working conditions. The actual results are subject to on-site leak detection and gas detection results.

Related questions and answers

The odor has become smaller after process adjustment, does it still need to be reviewed?
Recommend review. Odor changes may reflect composition changes rather than load reduction, and should be judged in conjunction with the new bill of materials and gas detection, not just by the senses.

I only changed the cleaning agent, does the filter element need to be replaced?
It is not necessarily necessary to change the core immediately, but it should be checked whether the released components of the new cleaning agent are within the applicable range of the original medium, and if necessary, additional testing or configuration adjustments should be made.

Can Aili Industrial assist in the review after process adjustment?
Can be combined with change list, new material information and original filter configuration to help check media suitability and filter section location. The specific plan needs to be confirmed based on product data and on-site working conditions.

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Key points for selection and acceptance inspection