Dịch vụ chuyên nghiệp
PAO Leak Test
Tổng quan sản phẩm
Kiểm tra rò rỉ PAO (Poly-Alpha-Olefin) là phương pháp tiêu chuẩn để kiểm tra tính toàn vẹn và phát hiện rò rỉ tại chỗ cho màng lọc HEPA/ULPA hiệu suất cao trong phòng sạch. Baisheng Tech tuân theo IEST-RP-CC034, ISO 14644-3 và FED-STD-209E, sử dụng máy tạo khí dung để tạo đồng đều khí dung PAO tiêu chuẩn phía thượng nguồn màng lọc, sau đó dùng máy đo quang học quét toàn diện mặt thổi và mối nối khung-màng lọc để xác định hư hỏng, rò rỉ keo viền hoặc bịt kín lắp đặt không đạt yêu cầu phòng sạch và kiểm định GMP.
Tính năng & Thông số kỹ thuật
| Item | Specification / Method |
|---|---|
| Test standard | IEST-RP-CC034 / ISO 14644-3 / FED-STD-209E |
| Applicable filters | HEPA (H13/H14), ULPA (U15 and above) |
| Test aerosol | PAO (Poly-Alpha-Olefin) * FDA food-grade compliant |
| Upstream concentration | 10 ~ 100 μg/L |
| Scan speed | ≤ 50 mm/s |
| Probe distance from filter | ≤ 25.4 mm (1 inch) |
| Sampling flow | 28.3 L/min (1 CFM) ± 10% |
| Acceptance criteria | Downstream penetration ≤ 0.01% (H14) / ≤ 0.005% (ULPA) |
| Report contents | Test report + leak location diagram + certification label |
Mô tả chi tiết
Service Overview
Baisheng Tech provides on-site integrity testing (PAO Leak Test) services for HEPA / ULPA high-efficiency filters in cleanrooms, covering pre-test airflow/velocity verification, aerosol uniformity validation, full-area leak scanning, leak repair recommendations, certification labeling, and formal validation reports. Widely applied in semiconductor, optoelectronics, biomedical, pharmaceutical GMP, and medical facility clean environments.
Test Principles
- **Upstream injection**: Cold / thermal aerosol generators produce PAO droplet aerosol with particle size approximately 0.3 μm upstream of the filter - **Downstream scanning**: An aerosol photometer (Photometer) scans comprehensively in an S-shaped trajectory at a distance of ≤ 25.4 mm from the downstream discharge face - **Penetration calculation**: Real-time comparison of upstream/downstream concentration ratio, calculating local penetration to determine leaks - **Frame inspection**: Focused scanning on filter frames, adhesive joints, gaskets, and installation gaps to identify installation leaksTest Procedure
1. **Pre-test verification**: Inspect filter model, dimensions, installation status, and return air system operation 2. **Velocity measurement**: Measure average discharge face velocity per ISO 14644-3, confirming rated range 3. **Upstream concentration establishment**: After PAO injection, sample upstream to confirm 10~100 μg/L concentration with uniformity ≤ ±15% 4. **Downstream leak scanning**: Comprehensively scan filter discharge face and surrounding joints at ≤ 50 mm/s 5. **Leak marking**: Positions exceeding penetration limits are labeled and reported to construction team for repair 6. **Re-test verification**: Rescan after repair until fully compliant 7. **Report delivery**: Provide test report, leak location diagram, certification label, and calibration traceability documentsAcceptance Criteria
| Filter Class | Overall Efficiency | Local Penetration Limit (PAO Scan) |
|---|---|---|
| HEPA H13 | ≥ 99.95% | ≤ 0.01% |
| HEPA H14 | ≥ 99.995% | ≤ 0.01% |
| ULPA U15 | ≥ 99.9995% | ≤ 0.005% |
| ULPA U16 | ≥ 99.99995% | ≤ 0.005% |
* Any instantaneous reading exceeding the limit at any point during scanning is determined to be a leak and must be repaired on-site or the filter replaced and re-tested.
Instruments Used
- **Aerosol Photometer**: ATI TDA-2i or equivalent, dynamic range 0 ~ 100 μg/L, resolution 0.001% - **PAO Generator**: Cold (Laskin Nozzle) or thermal, selected by filter area - **Particle Counter**: Sampling flow 2.83 L/min (0.1 CFM), particle size channels 0.3 / 0.5 / 1 / 3 / 5 μm - **Anemometer / Air Capture Hood**: Measures filter discharge face velocity and total airflowApplications
- Semiconductor, TFT-LCD, OLED cleanrooms Class 1 ~ Class 10,000 - Biotech/pharmaceutical GMP A / B / C / D grade aseptic areas - Hospital operating rooms, ICU, isolation wards, negative pressure wards - Biological safety cabinets (BSC), laminar flow workbenches, glove boxes - Pharmaceutical filling lines, aseptic filling lines, RABS / Isolator - Nuclear facility HEPA filtration systems, AMC exhaust treatment systemsService Commitment
- Test personnel certified with IEST / ISO 14644 training - Instruments calibrated annually by OEM with traceability documents - Bilingual (Chinese/English) test reports provided - Island-wide on-site service including night and holiday engineering coordination ◎ Test standards: IEST-RP-CC034 / ISO 14644-3 / FED-STD-209E ◎ Report format: PDF + physical signed copy ◎ Customized test programs per customer SOP welcomedTham khảo chọn sản phẩm
Trước khi đặt hàng, hãy xác nhận cấp hiệu suất, loại vật liệu lọc, và môi trường vận hành có phù hợp yêu cầu.
