Will the non-standard outer frame of ULPA filter affect on-site leak detection?

The non-standard ULPA filter frame may affect on-site leak detection. The key lies in edge accessibility, sealing form and probe movement space. Shaped or raised borders should not obscure areas requiring verification. The outer frame is made so that it can be installed and sealed, but it must be inspected after it is installed. Leak detection accessibility must be taken into consideration during the structural design stage, instead of waiting to figure out a solution after installation. Aili Industries has a clear approach in the design of non-standard outer frame structures: first confirm the leak detection method and probe movement space, then determine the frame structure, and regard leak detection accessibility as a prerequisite for the outer frame design rather than an after-the-fact remedy.

1. Planning the scanning path at the drawing stage

Mark the locations of media edges, glue seams and installation seals, and confirm that the probe size and specified distance can be achieved to avoid having to consider testing after completing the installation.

Many problems with non-standard outer frames arise from the design sequence: determine the structure first, then try to detect leaks, only to find that the probe cannot enter or the corners are blocked. Aili Industry isWhen HEPA/ULPA filters are customized, the detection tooling and probe size will be used as one of the input conditions for structural design. The area to be scanned and the path that the probe can reach are marked at the drawing stage. In the outer frame designed in this way, the structure and leak detection are considered simultaneously, instead of having the structure first and then finding the detection method.

2. Identify the occlusion caused by special structures

Ribs, flanges, flanges and shrouds may create obstructions. If removing parts changes the sealing state, it is necessary to evaluate whether the test object still represents the use condition.

If the glue seam is blocked after the frame is raised and fixed, the detection window needs to be adjusted simultaneously instead of removing the glue seam from the inspection range. Aili Industry isIn the structural design of non-standard ULPA filters , I have practical processing experience in the relationship between different frame forms (reinforcing rib arrangement, flange position, folding direction) and leak detection accessibility. I can point out which forms will block the scanning path during the structural planning stage, and give alternative structural suggestions, reducing the number of cases where detection cannot be discovered after installation. The relationship between sealing boundary and detection range can be referred toULPA ultra-high efficiency filter FAQ and selection guide。

3. Write the testing plan into the agreement so that the boundaries of responsibility are clear

Describes coverage, tooling, and permitted procedures. A factory scan alone cannot replace the field installation leak detection required by the project.

The testing plan is written into the agreement, which means that the outer frame structure, leak detection method and acceptance responsibility correspond to each other. When communicating on non-standard projects, Aili Industries will discuss the outer frame structure plan and leak detection methods together: the project party provides leak detection standards and probe conditions, and the manufacturer confirms whether the outer frame structure supports full coverage scanning. This 'structure-detection' synchronous confirmation method can expose accessibility issues before placing an order, instead of waiting for the goods to arrive and then coordinate. Ceiling-mounted inspection spaces can be combinedFor structural verification of the FFU fan filter unit , please refer to the testing conditions for internal installation of the equipment.the fan filter unit on the EFU equipment side .Instructions related to

4. Related questions and answers

Can non-standard outer frames continue to use conventional inspection tooling?
The tool clamping, air flow and scanning space need to be checked and cannot be applied directly without verification. After the outer frame form is changed, the clamping position and probe path of the original tooling may no longer be applicable.

Raising the frame improves fixation, but what about blocking the glue seam?
The detection window should be adjusted simultaneously or the local structure of the border should be changed instead of deleting the glue seam from the inspection range. Taking leak detection accessibility into consideration during the structural design stage can avoid such conflicts from the source.

Can the factory scan pass replace the on-site installation leak detection?
cannot. The factory inspection verifies the condition of the filter element body. After on-site installation, the box and sealing interface are added. Leak detection in the installed state needs to be done according to project requirements.

5. Related articles

ULPA ultra-high efficiency filter FAQ and selection guide

HEPA FAQs and Selection Guide

EFU FAQ and technical support

ISO cleanliness level comparison

6. Key points for selection and acceptance inspection

7. Product matching and technical support from Aili Industrial

Aili Industry isIn the structural design of the non-standard ULPA filter , leak detection accessibility is regarded as a prerequisite for the outer frame design: first confirm the leak detection method and probe movement space used in the project, and then determine the frame structure form to avoid 'it can be installed but cannot be detected'. We have practical processing experience in the relationship between different outer frame structures (reinforcing ribs, flanges, folded edges, and heightened frames) and scanning paths. We can point out occlusion risks and give alternative suggestions during the structural planning stage. Ceiling projects can be combinedThe FFU fan filter unit confirms the detection space, and the equipment-side items can be checked at the same timethe fan filter unit at the EFU equipment end . Installation and testing conditions of Provide process objectives, installation diagrams, leak detection methods and probe conditions for further communicationULPA ultra-high efficiency filters . Standard specifications, non-standard interfaces, samples and batch matching of The specific parameters and test range are based on the confirmed model and technical documents.