High-efficiency air filters are critical in industries such as pharmaceuticals, semiconductors, and cleanrooms. To ensure their performance, the most widely used standard in Europe is في 1822.
This article explains EN 1822 in a clear and practical way, including its classification system, طرق الاختبار, وتطبيقات العالم الحقيقي.
1. What Is EN 1822?
في 1822 is a European standard used to evaluate the performance of HEPA and ULPA filters.
It focuses on:
- كفاءة الترشيح
- كشف التسرب
- حجم الجسيمات الأكثر اختراقًا (MPPS)
👉 The goal is to ensure filters meet strict requirements for high-cleanliness environments.
2. في 1822 نظام التصنيف
في 1822 classifies filters based on their efficiency at MPPS:
| فصل | كفاءة |
|---|---|
| ه10 | ≥ 85% |
| ه11 | ≥ 95% |
| ه12 | ≥ 99.5% |
| ح13 | ≥ 99.95% |
| ح14 | ≥ 99.995% |
| تحت 15 – تحت 17 | ≥ 99.9995% وما فوق |
👉 HEPA filters typically fall into H13–H14 classes
👉 ULPA filters go beyond H14
3. Key Concept: MPPS
ال حجم الجسيمات الأكثر اختراقًا (MPPS) is the particle size that is hardest to capture.
- Typically around 0.1–0.3 μm
- Efficiency is lowest at this size
👉 EN 1822 evaluates filters at MPPS to ensure worst-case performance
4. في 1822 Testing Process
The EN 1822 standard includes several test steps:
خطوة 1: Determination of MPPS
- Measure efficiency across particle sizes
- Identify the weakest filtration point
خطوة 2: Overall Efficiency Test
- Evaluate filter efficiency at MPPS
خطوة 3: اختبار التسرب (اختبار المسح)
This is the most critical step.
- The filter surface is scanned
- Local leaks are detected
- Ensures no weak points
👉 Even if overall efficiency is high, a local leak can cause failure
5. Why Leak Testing Is Critical
Unlike general ventilation filters, HEPA filters must:
✔ Provide uniform performance
✔ Have no local defects
✔ Meet strict cleanroom requirements
👉 A single leak can compromise the entire system
6. في 1822 vs Other Standards
Compared to ايزو 16890:
- في 1822 → High-efficiency filters (هيبا/أولبا)
- ايزو 16890 → General ventilation filters
👉 EN 1822 is much stricter and more detailed
7. Applications of EN 1822 Filters
EN 1822-tested filters are widely used in:
- غرف الأبحاث الصيدلانية
- تصنيع أشباه الموصلات
- المستشفيات ومرافق الرعاية الصحية
- Aerospace and precision industries
👉 These applications require extremely clean air
8. Challenges in EN 1822 اختبار
في الممارسة العملية, testing HEPA filters can be challenging:
- Detecting very small leaks
- Maintaining stable aerosol concentration
- Ensuring scanning accuracy
- Avoiding false results
👉 These challenges require specialized testing equipment
9. حل الاختبار الموصى به
For accurate EN 1822 اختبار, especially leak detection, professional equipment is essential.
ال SC-L8023 Scanning Filter Tester from SCPUR is designed specifically for HEPA/ULPA filter testing.
المزايا الرئيسية
- كشف التسربات بحساسية عالية
- Precise scanning system
- توليد الهباء الجوي مستقرة
- نتائج موثوقة وقابلة للتكرار
👉 Ensures compliance with EN 1822 متطلبات
10. خاتمة
في 1822 is a critical standard for evaluating HEPA and ULPA filters, ensuring both:
✔ High overall efficiency
✔ Zero local leakage
Understanding this standard is essential for manufacturers and users in high-cleanliness industries.
