How to evaluate the quality of ULPA? Efficiency, resistance, sealing and manufacturing consistency

ULPA filter quality evaluation should combine efficiency, resistance, integrity, dimensional interface, materials and manufacturing consistency. A single efficiency number describes neither installation compatibility nor batch stability. A common deviation in quality evaluation is to equate 'high efficiency' with 'good quality'. Efficiency is only an indicator of filtration capacity. A filter that meets the standard but has dimensional deviations, loose sealing, or large resistance fluctuations between batches will also cause problems in actual use. Quality is multi-dimensional, and evaluation also requires multi-dimensional data. Aili Industrial has a production base of approximately 30,000 square meters. The manufacturing system covers motors, fans, control systems, sheet metal, air filters and complete machine assembly. ULPA's quality evaluation can extend from the performance data of the filter itself to the cooperation with the box interface, the consistency of batch delivery and the completeness of inspection records. The evaluation dimension covers the entire process from manufacturing to delivery.

1. Let the performance correspond to the working conditions: efficiency, resistance and leak detection must be considered with conditions

Confirm standards, particle size, air volume and resistance, check local leak detection and report traceability, and avoid comparing only decimal places.

The efficiency value must correspond to the test standard, particle size and test air volume. Efficiency numbers outside the conditions cannot be compared. The resistance value must correspond to the test air volume. The same filter has different resistance under different air volumes. The leak detection results must correspond to the scanning range and judgment method. Aili Industry isThe HEPA/ULPA filter test report lists the respective test conditions for efficiency, resistance and leak detection results.The ULPA ultra-high-efficiency filter report is filed by serial number. The efficiency data indicates the particle size and method, the resistance data indicates the test air volume, and the leak detection record indicates the scanning range. The relationship between levels and particle limits can be found inISO cleanliness level comparison。

2. Inspect manufacturing and delivery: frames, glue seams, seals and labels are all part of quality

Pay attention to the smoothness of the frame, glue seams, seals, labels, packaging and drawing versions, and check whether different batches are produced according to the same confirmed specifications.

The quality of the filter is not only reflected in the filter material. The flatness of the outer frame affects the installation and sealing fit, the integrity of the glue seams affects the body seal, the specifications and status of the seals affect the air tightness after installation, and the labels and packaging affect traceability and transportation protection. Aili Industry has factory inspection requirements for these items during filter frame processing and complete machine assembly.Non-standard ULPA filter projects are produced according to the confirmed drawing version and material list, and different batches are executed according to the same specifications.the liquid tank sealed ULPA filter have special inspections. The tank body and knife edge of Please refer to the quality inspection points of manufacturing and delivery links.HEPA FAQs and Selection Guide。

3. Judgment by samples and batch records: good samples do not mean stable batches

Prototype assembly, unit-by-unit or agreed inspection, exception handling and delivery data together constitute the basis for evaluation, and a display sample is not regarded as a complete proof of capability.

Quality evaluation needs to answer two questions: whether the performance of a single product meets the standard, and whether the performance of batch products is stable. The performance of a single unit can be confirmed through the test report. The stability of the batch depends on the consistency of the test data distribution, abnormality rate, resistance and size of different batches. Aili Industry isWhen ULPA ultra-high-efficiency filters are delivered in batches, inspection records are provided by batch, and the inspection data is archived by serial number. The project party can compare the efficiency and resistance distribution of different batches;The non-standard ULPA filter project enters mass production after passing the verification at the prototype stage, and the batch products are executed according to the same specifications and processes. For evaluation methods of batch consistency, please refer toULPA ultra-high efficiency filter FAQ and selection guide。

4. The two products have the same grade but different interface tolerances and resistance data, and the actual matching and maintenance costs are also different.

The two product grades are the same, but the interface tolerance and resistance data are different, and the actual equipment matching and maintenance costs may also be different. The interface tolerances are different, the fitting state and sealing effect during installation are different; the resistance data are different, the fan operating point and operating energy consumption are different. If the quality evaluation is only compared with the grade, these differences will be covered up.

Aili Industry isThe HEPA/ULPA filter product information also gives the grade, dimensional tolerance, resistance and sealing form. When evaluating, you can compare it from multiple dimensions instead of just comparing one grade number.FFU fan filter unit andWhen matching the fan filter unit at the EFU equipment end , the actual matching status can be checked based on the interface tolerance and resistance data. The dimensions of product comparison can be referred toHEPA FAQs and Selection Guide。

5. Related questions and answers

Does good quality only depend on advanced testing equipment?
Equipment is only one of the conditions. It also depends on the consistency of methods, process control, records and physical delivery.

Does the same grade mean the quality is the same?
cannot. Interface tolerances, resistance data, seal forms and batch consistency can all vary, with grade being just one dimension.

How to evaluate the consistency of batch products?
Compare the inspection data distribution, abnormality rate and key dimension records of different batches, and make a comprehensive judgment based on the completeness of the delivery materials.

6. Related articles

ULPA ultra-high efficiency filter FAQ and selection guide

Non-standard customized ULPA ultra-high efficiency filter

Liquid tank seal ULPA ultra high efficiency filter

HEPA FAQs and Selection Guide

7. Key points for selection and acceptance inspection

8. Product matching and technical support from Aili Industrial

Aili Industrial has a production base of approximately 30,000 square meters. The manufacturing system covers motors, fans, control systems, sheet metal, air filters and complete machine assembly. ULPA quality evaluation can extend from filter performance to box interface coordination, batch consistency and completeness of inspection records.The HEPA/ULPA filter test report lists the respective test conditions for efficiency, resistance and leak detection results.ULPA ultra-high-efficiency filter reports are filed by serial number, and inspection records are provided by batch during batch delivery, so that projects can compare the efficiency and resistance distribution of different batches;Non-standard ULPA filter projects are produced according to the confirmed drawing version and material list, and different batches are executed according to the same specifications.The liquid tank seal ULPA filter tank body and knife edge have special inspections. The product information also gives the grade, dimensional tolerance, resistance and sealing form.FFU fan filter unit andthe EFU equipment-end fan filter unit is matched. The actual matching status can be checked when 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.