CEN standards in Europe, IEST and MIL standards in the US are used for HEPA and ULPA filters. At Ulpatek, every HEPA and ULPA filter is tested individually in ULPALAB and supplied with its own test certificate.
HUF-SCAN 4002
The filter surface is scanned at nominal air flow with an automatic probe connected to particle counters that count particles at the MPPS.
• The particle counters measure the aerosol concentration upstream and downstream of the filter during the test.
• It is a test method in which the highest penetration value permitted for the filter class is checked in an ISO Class 5 clean zone (ISO 14644-1; formerly Class 100). If there is a leak, it detects the leakage points and print as a figure.
• The MPPS scan test is the reference leak test method for HEPA and ULPA filters in EN 1822-1 and ISO 29463-4.
HF-SCAN 3004
Test operator scans the filter surface with the probe which is connected to photometer to check the leakage at 0.3 μm particle size. Test is applied for each filter individually.
• In the leak tests of HEPA filters performed at the nominal air flow rate, PAO (Emery 3004) aerosol is used in accordance with EN 1822 / ISO 29463.
• The high concentration of aerosol fed during the test is checked in the ISO Class 5 (formerly Class 100) test area by scanning the filter surface and sealing surface with the probe to check leakage.
• If there is leakage, repairing can be carried out by applying special adhesive according to the standard and customer requirements to the leakage point.
• After installation of the filters in the field, performing this test is recommended before commissioning system.
HF-OIL MIST 1200
Oil Thread Leak Test is done by naked eye for checking leakage on the HEPA filter surface at a nominal air flow rate using DEHS as aerosol.
• The particles formed as oil smoke lines from their leak points can be easily seen with the black colored cabin interior design and the appropriate light angle.
• If there is leakage, repairing can be carried out by applying special adhesive according to the standard and customer requirements to the leakage point.
• Used as an alternative leak test method for class H13 and H14 class filters.
• It provides easy testing for filters which are not suitable for the scanning test (V-Compact, cylinder filter, filters without faceguard protection).
