What should be rechecked before activating ULPA that has been stored for a long time?

long term storagethe ULPA filter , the storage records, packaging, sealing materials, frames and testing data should be checked, and the scope of re-inspection should be determined based on the model and actual exposure. Before using Just because it has not been used does not mean that the status does not require confirmation. A stock filter element that has not been opened for two years may not necessarily be in the same condition as when it left the factory - there may be moisture inside the package, the seal may be aged, and the equipment interface may have been modified during this period. Aili Industrial provides a storage history and storage condition instructions when delivering its products. Records are available from off-line warehousing to out-of-warehouse, so that the storage status of the inventory filter elements can be documented, instead of just judging whether it can be used based on 'not dismantled'.

1. Confirm the storage history: first look at the records and then look at the physical objects

Check storage time, abnormal temperature and humidity, changes in transportation and packaging, and identify spare parts that lack records or have been affected by moisture and collision.

Storage history is the first basis for judging the scope of re-inspection. For filter elements with complete records and no abnormal exposure, the scope of re-inspection can be relatively narrowed; for filters that lack records or have experienced abnormal temperature and humidity or transportation collisions, the scope of re-inspection needs to be expanded. Aili Industry isHEPA/ULPA filters can be delivered with a storage history from the production line to the warehouse.The history of the ULPA ultra-high-efficiency filter includes the storage time, storage environment and status confirmation before leaving the warehouse. The project team can judge what re-inspections are needed for this start-up based on this. The relationship between levels and filtering requirements can be found inISO cleanliness level comparison。

2. Check the physical object and project requirements: the model is correct, but the interface may have changed.

Model, size, grade and interfaces should still be suitable for current equipment. Old purchasing specifications may no longer be consistent with the retrofitted equipment.

The model of the stock filter element may be matched that year, but the equipment interface, installation structure or process requirements may have been adjusted during this period. Aili Industry isIn the non-standard ULPA filter project, we encountered the situation where the old inventory was used after the equipment was changed to the liquid tank interface. The relationship between the knife edge and the tank body needs to be rechecked, and it cannot be installed directly because the models are similar. For interface changes installed inside the device, please refer tothe fan filter unit on the EFU equipment side .Instructions related to

3. Arrange re-inspection according to risk: first look at the appearance of the seal, and then decide whether to require additional testing

First check the appearance and sealing status, and then confirm resistance, integrity and other items as required. Reinspection records should be associated with the original number and storage history.

The re-inspection is not to do all the items again, but to sort them by risk. Appearance and seal status are the most basic inspections, which can detect obvious problems such as packaging damage and seal deformation. Whether resistance and integrity testing is necessary depends on whether there are any abnormalities in the preservation history and project acceptance requirements. Aili Industry isThe maintenance instructions of the FFU fan filter unit can be accompanied by descriptions of the inspection items for reinstalling the filter element.The ULPA ultra-high-efficiency filter FAQ and selection guide provide reference for the determination method of integrity testing.

4. What should you focus on checking when using old inventory after changing the liquid tank interface of the equipment?

After the equipment is changed to the liquid tank interface and the old stock is used, the knife edge and tank body should be rechecked and should not be installed directly because the models are similar. The position of the knife edge of the liquid tank structure, the depth of the tank body, and the type of sealing fluid may all change between the old and new interfaces. Similar appearance does not mean seal compatibility.

Aili Industry isThe supporting instructions for the liquid tank seal ULPA filter clearly specify the matching requirements between the tank body and the knife edge. Before using the old parts in stock, you can check them against the current equipment interface drawings. If necessary, do a sample test installation first. Please refer to the check points for sealing interfaces.HEPA FAQs and Selection Guide。

5. Related questions and answers

What should I do if the shelf life is not clearly stated?
The model requirements should be confirmed with the supplier and evaluated based on the preserved evidence. It is not advisable to assume that inspection can be exempted for a long time.

The stock filter element has not been opened, can it be installed directly?
Not recommended. The storage history, packaging status and current device interfaces should be checked before deciding whether re-inspection is required.

The device interface has been changed, can the old inventory still be used?
It is necessary to recheck the interface size, sealing surface position and compression method. Similar appearance does not mean seal compatibility.

6. Related articles

ULPA ultra-high efficiency filter FAQ and selection guide

Liquid tank seal ULPA ultra high efficiency filter

ULPA ultra high efficiency air filter

HEPA FAQs and Selection Guide

7. Key points for selection and acceptance inspection

8. Product matching and technical support from Aili Industrial

Aili Industry isHEPA/ULPA filters are delivered with a storage history from production off-line to shipment.The history of the ULPA ultra-high-efficiency filter includes the storage time, storage environment and status confirmation before shipment. The project can determine the scope of re-inspection based on this.The instructions for the liquid tank seal ULPA filter specify the matching requirements for the tank body and the knife edge. Before using the old parts in stock, you can check them against the current equipment interface drawings.FFU fan filter unit maintenance instructions can be combined with the filter element reinstallation inspection items.Non-standard ULPA filter projects can evaluate the suitability of old inventory based on current equipment interfaces. Provide process objectives, installation drawings, operating conditions and acceptance requirements, and can further communicate ULPA standard specifications, non-standard interfaces, samples and batch matching. The specific parameters and test range are based on the confirmed model and technical documents.