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HEPA FILTER TEST EQUIPMENT MANUFACTURER & PRINCIPAL
HEPA FILTER TESTING KEY MESSAGES EN1822/ISO29463 is for manufacturers testing of HEPA filters ISO14644-3 is for in-situ HEPA filter testing In-situ testing guidance available to test difficult-to-access filters Photometer method popular choice for in-situ test method globally
CONTENT The defects we have to find The test method The test equipment Some principles Test results
OUTDOORS TESTING
FIND THE DEFECT?
FIND THE DEFECT?
FIND THE DEFECT?
FIND THE DEFECT? So we have to measure!!
Defect in HEPA FILTER 0.001 % DOP scan test 21µ hole 0.01% DOP scan test 68µ hole
MPPS OF HEPA FILTER Diffusion Inertia Most Penetrating Particle Size Slide by Freudenberg Filtration
HEPA en ULPA Classificatie volgens EN1822: op MPPS (Most Penetration Particle Size) FliterClass Overall Value Efficiency % Overal Value Penetration % Local Efficiency % Local Penetration % H10 85 15 - - H11 95 5 - - H12 99.5 0.5 - - H13 99.95 0.05 99.75 0.25 H14 99.995 0.005 99.975 0.025 U15 99.9995 0.0005 99.9975 0.0025 U16 99.99995 0.00005 99.99975 0.00025 U17 99.999995 0.000005 99.9999 0.0001
AIR VELOCITY & EFFICIENCY CONSIDER 99.99995% at 0.015 m/s We all want this filter???? Then look at this :- 1. 99.9995% 0.03 m/s 2. 99.995% 0.06 m/s 3. 99.95% 0.12 m/s 4. 99.5% 0.24 m/s The MPPS shifts up and down with decrease and increase in velocity
ISO 14644-3 Aerosol concentration
Meet de luchtsnelheid/volume 0.45m/sec voor cleanroom of cabinet filters Maximaal 3m/sec voor HVAC filters Meet drukval over het filter ΔP 125 tot 175Pa voor cleanroom filters 150 tot 225 voor 1m/sec kanaal filters 175 tot 275Pa for 2m/sec+ HVAC filters Vervang het filter Waneer de luchtsnelheid of volume niet gehaald kan worden Als de ΔP 4x hoger is als de initiele begindruk Als de efficientie test niet gehaald word
THE TEST PRINCIPLES
BS EN ISO14644 TEST METHODS AIR DUCT HEPA FILTER DIRECTION OF OF AIR AIR FLOW Minimum of 20 duct diameters Challenge aerosolintroduced min min 20 20 duct duct diam from from filter filter under test Challenge aerosol concentration "x" g/l in range 20 to 80 g/l Filter scanned down stream for local leaks "y" g/l Downstream integral/volumetric test "y" g/l
Volumetric to scan Leak Relationship Volume Flow m3/hr DOP Volumetric Leak Equivalent Local DOP Leak 500 0.01% 3% 750 0.01% 4% 1000 0.01% 6% 1250 0.01% 7% 1500 0.01% 9% 1750 0.01% 10% 2000 0.01% 12% 2250 0.01% 13% 2500 0.01% 15% 2750 0.01% 16% 3000 0.01% 18% 3250 0.01% 19% 3500 0.01% 21% 3750 0.01% 22% 4000 0.01% 24%
DOP Photometers DOP TOUCH AEROSOL PHOTOMETER SP200
USER DEFINED PARAMETERS Oil type selected from drop-down menu Tester, client, facility - all can be detailed Instrument details can be added on screen All Data is used for the Filter Test Report
UPSTREAM CHALLENGE REVIEW Auto calibration with chosen oil aerosol type Min/max/average challenge recorded Challenge variation reported, user accept/reject prompted
LIVE GRAPH Data acquisition capability for excel use Shows defects even if filter % Penetration is acceptable
FILTER TEST REPORT Print A4 test certificate directly Save test certificate to USB memory stick or internal hard drive Supports GMP, EN1822, ISO29463 and IEST-RP-0034 data compliance
AEROSOL GENERATOR (cold/laskin nozzle) Pneumatic Laskin Nozzle generator Laskin nozzle generator with compressor
AEROSOL GENERATOR (thermal) DOP2200 Thermal generator DOP1100 Thermal generator
Percentage Counts Particle size distributions Particle Size Distribution DOP1100 (Thermal - Hot ) versus Laskin Nozzle (Cold) 30.00 25.00 20.00 Thermal Laskin 15.00 10.00 5.00 0.00 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Mid Size Particle Range um
AEROSOL INJECTION Speed controlled PIP
AEROSOL MIXING HEPA Filter Direction of air flow 0.3 0.2 0.1 0 5 10 15 20 0-0.1-0.2-0.3 Point leak in filter 20 duct diameters before complete mixing occurs
Aerosol Injection Sampling Ports Scanning Probes
AEROSOL MIXING
RESULTS as % penetration 140.0000 120.0000 100.0000 80.0000 60.0000 Phot Phot100 40.0000 20.0000 0.0000 17:51:22 17:52:48 17:54:14 17:55:41 17:57:07 17:58:34 18:00:00 18:01:26-20.0000
REPORTING RESULTS Average 0.0182 Min 0.0003 Max 0.1301
REMINDER EN1822/ISO29463 is for manufacturers testing of HEPA filters ISO14644-3 is for in-situ HEPA filter testing In-situ testing guidance available to test difficult-to-access filters Photometer method popular choice for in-situ test method globally
THANKYOU FOR LISTENING Martin Derks/Tim Triggs timtriggs@dopsolutions.com +44 (0)1462 676446 +44 (0)7809 868444 Providing Solutions for all your filter testing needs Lighthouse BV www.golighthouse.nl +31 (0)487 560811