Beijing Zetron Technology Co., Ltd CN

HEPA Filter Leak Testing Systems

Source: Beijing Zetron Technology Co., Ltd Popularity:291 Time:2022/10/20 17:11:46 small middle big
For food and drug manufacturers, leak detection refers to the on-site leak detection of high efficiency filters and their systems after installation, mainly to check small pinholes and other damages in the filter material, such as frame seals, gasket seals and leaky seams on the filter frame. The purpose of leak detection is to check the tightness of the HEPA filter and its connection with the installation frame, to detect any defects in the HEPA filter itself and in the installation, and to take corresponding remedial measures to ensure the cleanliness of the area. Whether there is a leak. The purpose of dust generation is to detect leaks without dust generation, as the concentration of dust particles upstream of the HEPA filter is low and it is difficult to detect leaks with a particle counter.

What are the standards for leak detection of HEPA filters?
FED-STD-209E, Par.50 Federal Standard (Cleanroom and Workstation Requirements)
AACC, CS-1T American Association for Contamination Control (Standard for High Efficiency Filters)
AACC, CS-2T American Society for Contaminant Control (Laminar Flow Clean Air Units)
AACC, CS-6T American Society for Contamination Control (Clean Room Testing and Certification)
IES , RP-CC-001-3 Institute of Environmental Science (High Efficiency Filters)
IES , RP-CC-002-86 Association for Environmental Science (Recommended Practices for Laminar Flow Clean Air Installations)
IES , RP-CC-001-2 Environmental Science Association (Test Clean Rooms)
NSF, STD No. 49- 1992 National Sanitation Foundation (Secondary Laminar Flow Biological Safety Cabinets)
ANSI, N101. 1-1972 American National Standards Institute (Efficiency Testing of Air Cleaning Systems with Filters)

ANSI/ASME, N5101. 198 American National Standards Institute/American Society of Mechanical Engineers (Testing of Nuclear Air Cleaning Systems) NEBB National Environmental Balance Agency (Standard for Clean Room Certification Test Procedures)

I. Aerosol photometer PM-350

1. 5-inch colour touch screen in the main unit, easy to operate and faster data processing
2. Portable scanning probe, 3.5 inch colour display, one key operation, synchronous display with the host interface, convenient for users to observe the test results
3 Automatic upstream and downstream switching
4. To ensure reliable and stable data, imported air pump and light source are used

Data display range 0.0001%-100.0% Multi-colour LCD display
Dynamic range 0mg/ m3 to 120mg/m3

1% of reading (0.01% to 100%)

Repeatability 0.5% of reading (0.01% - to 100%)
Flow control 1cfm (28.3L/min) ±10%
Automatic zeroing Automatic zero value establishment
Alarm 2 modes of audible and visual alarm when preset limit values are exceeded
Report Continuous mode, storage mode (up to 6000 data sets), print mode
Aerosol types PAO, DOP, DEHS, etc. multi-dispersion
Standards met NSF49, IEST, ISO14644.
EN61010-1:2010, EN61326-1:2006
Power source AC 220V 50/60Hz
Dimensions 258 (L) x 178 (W) x 360 (D)
Weight 9.8kg (body), 10.3kg (body, scanning probe)

II. Aerosol Generator HRF-5C
The HRF-5C is an enhanced aerosol generator offering greater convenience to the user, with an oil circuit insurance supply system and thermal cut-out function that is in a higher class of safety systems on the market today, suitable for certification, HEPA performance testing and installation. Inert gas required, suitable for AC220v±10%50HZ power supply.

Available flow ranges 1,500-65,000cfm (42-1,839.5m3/min)
Occurrence concentration 10ug/L: flow rate 65,000cfm (at approx. 1839.5m3/min)
100ug/L: flow rate 6,500cfm (at approx. 183.95m3/min)
Particle generation PAO, DOP, polydispersed
Generation method Heat generation
Compressed gas (inert) Nitrogen, Argon, Carbon Dioxide or Helium (50psi))
Power supply AC220-240VAC,50/60HZ
External dimensions Approx. 280 x 390 x 300mm
Weight Approx. 14kg

III. HRF-4B aerosol generator 

HRF-4B aerosol generator by Laskin Nozzle dust production method, manually adjustable and has a large capacity loading dust production.

Output range 50 - 8,100 cubic feet per minute
(1.4 - 229m3min)
Suspended Particle Concentration 100 µg/l at 810 cubic feet per minute flow rate
Suspended Particle Concentration 10 ug/l at 8100 cfm
Type of generation 1 to 7 Laskin nozzles
Compressed air 3 to 18 cubic feet per minute at 20 psi
Particle generation PAO, DOP, polydispersed
Gas types Multiple particle diameters (cold)
Dimensions (25cm L X 28cm W X 23cm H)
Weight  7.4KG
Power supply  Not required


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