전문 서비스
PAO 시험
제품 개요
PAO(Poly-Alpha-Olefin) 누설 시험은 클린룸 HEPA / ULPA 고성능 공기 필터의 현장 완전성 및 누설 검사를 위한 표준 방법입니다. Baisheng Tech는 IEST-RP-CC034, ISO 14644-3 및 미국 연방 규격 FED-STD-209E에 따라, 에어로졸 발생기로 필터 상류에 PAO 표준 오일 에어로졸을 고르게 발생시킨 뒤 에어로졸 광도계(Photometer)로 하류 토출면과 필터·프레임 접합부를 빠짐없이 스캔합니다. 이를 통해 필터 본체의 손상 여부, 테두리 접착부의 누설 여부, 설치 실링의 확실성을 판정하여 클린룸 청정 등급과 GMP 검증 요구를 충족합니다.
제품 특성
| 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 |
상세 설명
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.
