MFP Series — HEPA / ULPA Filter Media Testers

MFP Series - Modular HEPA / ULPA Filter Test System

Description

The MFP Series filter test rigs are well proven worldwide in practical use of many applications in the development and quality control of filter media.

The MFP test rig is a mobile and modular system which can be fitted with a range of particle spectrometers, aerosol / particle generators and optional components such as corona discharge neutraliser and is available for both flat filter media and small filter elements.

The testing procedure can be extensively automated using the individually adjustable sequence programs of the filter test software FTControl and this, together with the clearly defined single components provides a high reliability in the measured results.

The test rigs are available in 4 basic configurations:

MFP 1000 | MFP 2000MFP 1000

The MFP 1000 and MFP 2000 use the welas® digital 1000 and welas® digital 2000 aerosol spectrometers and allow:

  • the pressure drop development at the unloaded medium
  • the initial fractional separation efficiency or
  • the loading and fractional separation efficiency during the loading

to be determined quickly, reliably and economically.

Aerosol generators used can be easily exchanged and aligned to the complete system allowing rapid filter testing with many different test aerosols.

With either the welas® digital 1000 or the welas® digital 2000 scattered light spectrometer a determination of the aerosol concentration, the particle size and thus a clear determination of the fractional separation efficiency is achieved.

MFP 1000 | MFP 2000 Technical parameters

  • Volume flow: 1-35 Nm3/h in pressurized operation
  • Inflow velocity: 5-100 cm/s (others on request)
  • Differential pressure measurement: 0-2500 Pa
  • Test surface of the medium: 100 cm2
  • Test aerosols: dusts, e. g. SAE dusts; salts, e. g. NaCl, KCl; liquid aerosols, e.g. DEHS
  • Particle measuring ranges:
    • welas® digital 1000: 0.12–3.5 µm, 0.2-10 µm, 0.25-17 µm, 0.6-40 µm
    • welas® digital 2000: 0.2-10 µm, 0.3-17.5 µm, 0.6-40 µm
  • Aerosol concentrations: for SAE Fine (ISO A2 Fine) without additional dilution, up to 1000 mg/m3
  • Dimensions (WxHxD): ca. 600 x 1800 x 900 mm
  • Compressed air supply: 5-8 bar = 36 Nm3/h
  • Power supply: 115/230V , 50/60 Hz

MFP 3000MFP 2000

The MFP 3000 works in the suction mode which ensures an especially even formation of the dust cake even at high inflow velocities.

It is fitted with the welas® digital 3000 light-scattering spectrometer, which uses two remote sensors for a quasi simultaneous particle measurement and offers the following advantages:

  • fully automated fractional separation efficiency measurement
  • using the test system for very high upstream and very low downstream aerosol concentrations

MFP 3000 Technical parameters

  • Volume flow: 1-35 m3/h in suction mode
  • Inflow velocity: 5-100 cm/s (others on request)
  • Differential pressure measurement: 0-2500 Pa
  • Test surface of the medium: 100 cm2
  • Test aerosols:
    • dusts, e. g. SAE dusts
    • salts, e. g. NaCl, KCl
    • liquid aerosols, e. g. DEHS
  • Particle measuring ranges:
    • welas® digital 3000: 0.2-9 µm, 0.25-17 µm, 0.6-40 µm
  • Aerosol concentrations: for SAE Fine without additional dilution up to 1000 mg/m3 (ISO A2 Fine)
  • Dimensions (WxHxD): ca. 600 x 2500 x 900 mm
  • Compressed air supply: 5-8 bar ; Vmax = 36 m3/h
  • Power supply: 115/230 V, 50/60 Hz

MFP HEPA | ULPAMFP ULPA

The MFP HEPA | ULPA is designed to test using either salt or DEHS aerosols interchangeably and can apply a range of particle spectrometers including the welas digital 1000 for HEPA media and alternative aerosol spectrometers e. g. Model 3340 (from TSI Inc.) or HSLAS II (from PMS Inc.) for ULPA media can be used as the analysis module in the MFP filter test rig. On request, also other particle measuring devices can be installed.

The MFP ULPA includes dilution cascades for concentration reductions between 10:1 and 10000:1 to allow the instruments to be used at high challenge concentrations. The installation is desgned to be removable and so the rig can be modified from using salt based aerosols to DEHS aerosols without any cleaning being required.

MFP ULPA Technical parameters

  • Volume flow: 0.54 - 16 m3/h in pressurised operation
  • Inflow velocity: 1.5 - 40 cm/s (others on request)
  • Differential pressure measurement: 0 - 2500 Pa (others on request)
  • Test surface of the medium: 100 cm2
  • Aerosol types: salts, e. g. NaCl, KCl; liquid aerosols, e.g. DEHS
  • Particle measuring ranges:
    • welas® digital 1000: 120 - 2000 nm, 200 - 10000 nm, 0.25 - 17 µm, 0.6 - 40 µm
    • Model 3340: 90 nm - 7500 nm
    • HSLAS II: 60 nm - 1000 nm
  • Dilution cascades with factors 10, 100, 1,000, 10,000
  • Dimensions (WxHxD): approx: 600 x 1800 x 900 mm
  • Compressed air supply: 5-8 bar; = 24 m3/h
  • Power supply: 115/230V , 50/60 Hz

Application examples

Testing of filter media and small filter elements in the product development and during the production control. Testing according to ISO 11155-1 (Cabin air filters), ISO 5011 (Engine air filters), EN779/ASHRAE 52.2 (Room air filters), EN 1822-3 (HEPA filters), CEN EN 143 and other standards in different versions

Particular advantages

  • Internationally comparable measuring results
  • High distribution of the measuring system
  • High reproducibility of the test procedure
  • Simple use of different test aerosols like e. g. SAE Fine and Coarse, NaCl/KCl, DEHS
  • Flexible filter test software FTControl
  • Sequence programs for pressure drop measurement, fractional separation efficiency measurement and loading measurement
  • Easy to handle; fast training even of untrained staff
  • Short set-up times
  • Cleaning and calibration can be accomplished by the customer himself
  • Simple use of the measuring technological components also in other applications
  • Mobile set-up, easy to move on wheels
  • Reliable operation
  • Individual component and complete system validation during pre acceptance and delivery
  • Low maintenance

Please contact us for more detailed information.