How to connect the clean area expansion to the old ULPA system? Model and performance compatible

The clean area is expanded to connect the oldFor the ULPA filter system, it is necessary to check the old and new models, interfaces, air volume resistance, control and acceptance status. Expansion not only adds filters, but may also change the airflow and pressure relationship in the original area. The most easily overlooked aspect of an expansion project is 'the new area is built, but there is a problem in the old area': ​​new modules change the flow distribution of the shared air duct, new return air changes the regional pressure difference, and new equipment changes the local air flow path. The focus of the connection is not to install the new filter, but to allow the new and old systems to continue to operate stably as a whole. Aili Industrial's product line covers different grades, structures and sealing forms.HEPA/ULPA filter , also availableFFU fan filter unit、EFU equipment end fan filter unit andFFU computer group control system , the expansion project can check the interface, air volume and control compatibility of the old and new systems within the same system.

1. Investigate existing systems: models, locations, testing and maintenance records

Organize models, installation points, inspection and maintenance records, measure air volume and pressure, and identify areas with insufficient data and insufficient performance margin.

The basis for expansion connection is to understand the actual status of the old system. The model, installation point, operating parameters, inspection records and maintenance history of the old system determine what the new system needs to interface with. If the old system data is incomplete, it is necessary to supplement the air volume, pressure and interface data through actual measurements. Aili Industry isIn the HEPA/ULPA filter expansion project, it is recommended to sort out the model and test records of the old system first.The FFU computer group control system can record the partition operating parameters of the old system, compare the actual measured data with historical records, and identify which parts have sufficient margin and which are close to the upper limit. The relationship between levels and filtering requirements can be found inISO cleanliness level comparison。

2. Design the handover between the old and the new: shared air ducts, power supply, group control and return air

Clarify the isolation of shared air ducts, power supply, group control, return air and construction to avoid compatible interfaces but incompatible controls, or construction pollution affecting the operating area.

There are often more than one handover points between the old and new systems: whether the air ducts are shared, whether the power supply is on the same circuit, whether the group control is on the same platform, whether the return air affects each other, and how to isolate the operating area during construction. If any part is not coordinated well, it may be exposed during the debugging or running phase. Aili Industry isIn the FFU fan filter unit expansion project, confirm the interface according to the air duct and group control relationship between the old and new systems.The FFU computer group control system supports partition management. New areas can independently set operating parameters, while old areas maintain their original settings;Non-standard ULPA filter projects can customize the transition structure according to the old system interface. Please refer to the design points for the handover between the old and the new.HEPA FAQs and Selection Guide。

3. Phased debugging and acceptance: both the new area and the affected old area must be confirmed

Both the new area and the affected old area should be included in the confirmation, and the boundaries, layout and final settings should be preserved. Only newly added modules cannot be detected.

If only the new area is tested during expansion acceptance, changes in the old area may be missed. The new module changes the air volume distribution of the system. The air volume and pressure difference in the old area may have changed, but without measurement, it is not known whether the change is within the allowable range. Aili Industrial recommends that both the new and old areas be included in the expansion project for commissioning and acceptance.The FFU computer group control system records the air volume, pressure and operating parameters of the new and old areas.The detection data of the new area of ​​the ULPA ultra-high efficiency filter and the historical data of the old area are archived separately for easy comparison. For the scope definition of expansion acceptance, please refer toULPA ultra-high efficiency filter FAQ and selection guide。

4. When the shared return air increases after expansion, the pressure in the old area may change and should be measured and adjusted together.

When the shared return air increases after expansion, the pressure in the old area may change and should be measured and adjusted together. After the new area is connected to the same return air system, the total amount of return air increases. If the return air path or fan is not adjusted accordingly, the pressure difference in the old area may deviate from the original setting.

Aili Industry isIn the FFU fan filter unit expansion package, the pressure impact is evaluated based on the relationship between the new and old area shared return air.The FFU computer group control system records the pressure status of each area and adjusts the air supply and exhaust ratio according to the actual measured data after expansion;The EFU equipment-side fan filter unit equipment-side scenario can be configured separately according to the new equipment to reduce the impact on the old area. For the method of pressure adjustment after expansion, please refer toEFU FAQ and technical support。

5. Related questions and answers

Do the old and new ULPA ratings have to be exactly the same?
Depending on the area and system objectives, the level can be configured as needed, but the overall airflow and acceptance requirements need to be confirmed.

Is it possible to expand and only detect new areas?
Not recommended. Adding new modules may change the air volume and pressure of the old area, so both the old and new areas should be included in the confirmation.

What should I do if the old system data is incomplete?
Supplement air volume, pressure and interface data through actual measurements, and organize the existing system status with available historical records.

6. Related articles

ULPA ultra-high efficiency filter FAQ and selection guide

FFU computer group control system

Non-standard customized 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's product line covers different grades, structures and sealing forms.HEPA/ULPA filter , also availableFFU fan filter unit、EFU equipment end fan filter unit andFFU computer group control system , the expansion project can check the interface, air volume and control compatibility of the old and new systems within the same system.The HEPA/ULPA filter expansion project first sorts out the old system models and inspection records.The FFU computer group control system records the operating parameters of the old system partition and compares them with the actual measured data;The FFU fan filter unit expansion project confirms the interface according to the air duct and group control relationship between the old and new systems.The FFU computer group control system supports partition management. New areas can set parameters independently, while old areas maintain their original settings.Non-standard ULPA filter projects can customize the transition structure according to the old system interface. Both the old and new areas will be included in the expansion acceptance and debugging.The FFU computer group control system records the air volume, pressure and operating parameters of the old and new areas.The detection data of ULPA ultra-high efficiency filters are archived separately; after the shared return air changes, the air supply and exhaust ratio is adjusted according to the actual measured data.The EFU equipment side fan filter unit equipment side scenario can be configured separately according to the newly added equipment. 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.