HEPA filter cassettes for the filtration of dust-laden process air in self-cleaning HEPA filter units.
max. dust load in process air: 150 g/m3

The original 
manufactured since the 1970ies

by the inventor of the self-cleaning HEPA filter system in 2nd generation

Function of self-cleaning HEPA filter systems

Technical features HEPA filter cassettes

Safety HEPA Filter Cassette Stage 2

  • Constant filter efficiency H 14 EN 1822
  • Max. pressure differential > 2 kPa.
  • Grounded incl. ground monitoring
  • Combustible with MDF frame
  • With serial number and certificates

Self-cleaning HEPA Filter Cassette Stage 1

  • Filtration efficiency F9 / H13
  • Max. pressure differential > 3.5 kPa.
  • Max. dust laden air level 150 g / m³
  • High dust holding capacity
  • Grounded with ground monitoring
  • Combustible with MDF frame
  • With serial number and certificates

Filter media efficiency and seal test

During the validation process, as well as during operation and after each filter change, the security filter stage 2 can be tested by installed measuring lances and a laser particle counter to proof that the efficiency value of H14 / EN1822 has been reached. The sealing of the cassette is also checked here.

The result of the testing is documented and printed by the laser particle counter 
to proof the actual reached filter efficiency.

Closing the gap in containment, even when changing HEPA filter cassettes.

OEB 1 – 4

  • Ergonomic, easy and contamination-free filter change stage 1 and 2.
    with filter lifting table and double bag in bag out method and sealing tool.
  • The HEPA filter cassette can be sealed in its plastic bag, whereby the filter unit remains accordingly sealed. 
Without contamination of the operator the cassette can be transported to incineration within its sealed bag.

OEB 5 – 6

  • Ergonomic, easy and contamination-free filter change stage 1 and 2.
    With filter lifting table and double bag in bag out method and sealing tool.
  • For additional security the sealed HEPA filter cassette in its plastic bag
can be additionally sealed in a fibre drum and transported to incineration.

Explosion prevention by grounding control of HEPA filter cassettes

High safety standard by earthing monitoring

Each HEPA filter cassette is connected to the ground monitoring system of the filter unit within the control box. 
This ensures that the HEPA filter cassettes cannot be statically charged if there is no ground connection and that no ignition spark can occur, which could cause a dust explosion.

If one or more cassettes are not connected to ground, there is an error displayed at the touch panel.

Furthermore, the proper function of the filter unit as well as all possible errors and the standstill of the filter system is displayed simultaneously in each production room by green, yellow and red signal lamps.

HEPA filter cassette / unit types

Dimensions
mm		 Total filter area
m2		 HEPA cassette

type		 Unit
type		 OEB level
 
305 x 610 x 292 10
10		 HF1/10G
HF2/10G		 hf1-10g MMS 10/3.2 GB mms10-2 5 – 6
610 x 610 x 292 20
20		 HF1/20G
HF2/20G		 hf1-20g MMS 20/3.2 GB mms24-2 4 – 5
762 x 610 x 292 24
24		 HF1/24G
HF2/24G		 hf1-24 MMS 24/4.2 mms20-2 2 – 3
915 x 610 x 292 28
28		 HF1/28G
HF2/28G		 hf1-28 MMS 28/3.2 mms28-2 1 – 2

Technical Data HEPA Filter-Cassettes

Active, self-cleaning HEPA filter cassettes stage 1

Standard: Class F9 – H13
PTFE coated filter media: Class H13 certified according to EN 1822
Leakage and grounding test with certificate of manufacturer

Air volume
m3/h		 Type Dimensions
mm		 Filter area
m2		 Spec. filter area load
m3/m2h		 Initial pressure loss
Pascal		 Final 
pressure loss

Pascal		 Temp. max
C		 Max. load 
dust laden air
g/m3
750 HF1 / 10 G 305 x 610 x 292 10 75 150 3.500 100 150
1.500 HF1 / 20 G 610 x 610 x 292 20 75 150 3.500 100 150
1.800 HF1 / 24 G 762 x 610 x 292 24 75 150 3.500 100 150
2.100 HF1 / 28 G 915 x 610 x 292 28 75 150 3.500 100 150
1.000 HF1 / 10 G PTFE 305 x 610 x 292 10 100 170 3.500 100 150
2.000 HF1 / 20 G PTFE 610 x 610 x 292 20 100 170 3.500 100 150
2.400 HF1 / 24 G PTFE 762 x 610 x 292 24 100 170 3.500 100 150
2.800 HF1 / 28 G PTFE 915 x 610 x 292 28 100 170 3.500 100 150

Passive Safety HEPA filter cassettes stage 2

Class H14 certified according to EN 1822
Leakage and grounding test with certificate of manufacturer.

Air volume
m3/h		 Type Dimensions
mm		 Filter area
m2		 Spec. filter area load
m3/m2h		 Initial pressure loss
Pascal		 Final 
pressure loss

Pascal		 Temp. max
C
750 HF2 / 10 G 305 x 610 x 292 10 75 150 2.000 100
1.500 HF2 / 20 G 610 x 610 x 292 20 75 150 2.000 100
1.800 HF2 / 24 G 762 x 610 x 292 24 75 150 2.000 100
2.100 HF2 / 28 G 915 x 610 x 292 28 75 150 2.000 100
1.500 HF2 / 10 MP 305 x 610 x 292 21 71 320 2.000 100
3.000 HF2 / 20 MP 610 x 610 x 292 42 71 320 2.000 100
3.700 HF2 / 24 MP 762 x 610 x 292 49 75 320 2.000 100