Reverse Flow Pocket Filter

For Gas Turbine Inlet Air Filtration

For Gas Turbine Inlet Air Filtration EMW® offers a new pocket filter.The EMW® Reverse Flow pocket filter provides highly effective protection and prolonged service life of downstream filter modules.

Schematic illustration showing air flow through EMW® reverse flow filter.
Schematic illustration showing air flow through EMW® reverse flow filter.

Reverse Flow

In EMW® Reverse Flow pocket filters, air flow is in the reverse direction as compared to conventional designs, i.e. from the outer side of the pockets inwards. Accordingly, they are installed on the filter wall with the pockets facing outwards, providing room for additional filter elements in the free space behind. EMW® Reverse Flow pocket filters, when used in combination with EMW® GT Compact Filters, team up to provide big benefits.

Installation manual Reverse Flow Pocket Filter

Filter Efficiency

EMW® Reverse Flow pocket filters are Class G4 filters according to EN779 which are equipped with 6 synthetic-medium pockets. The progressively structured filter medium is specially designed for high efficiency in coarse particulate removal. A continuous connecting seal to the plastic frame ensures superb airtightness. All in all, EMW® Reverse Flow pocket filters provide highly effective protection and prolonged service life of downstream filter modules.

Seamless continuous seal for outstanding airtightness and reliability.
Seamless continuous seal for outstanding airtightness and reliability.
Stabilizers maintain pocket shape even in heavy-duty service.

Pressure Drop

Reverse flow filters are subjected to particularly high aerodynamic forces. These high forces can collapse filter pockets, causing increased pressure drop. EMW®Reverse Flow pocket filters have high flexural strength, providing sustained resistance to deformation. In addition they are equipped with internal stabilizers providing further long-term stability. The result: the pockets are held reliably in their original configuration, preventing additional pressure drop due to pocket collapse.

Technical Data

Filter type ISO Coarse KR-6/360 NG RF
Dimensions 592 x 592 x 360 mm
Nominal air flow rate [m³/h] 3400
Filter class according to EN 779 IC
Average Arrestance
Initial pressure drop 30
Filter type ISO Coarse KR-6/360 NG RF
Dimensions 592 x 592 x 360 mm
Nominal air flow rate [m³/h] 3400
Designated Filter Group ISO 16890 ISO Coarse 75%
Initial pressure drop 30

All data given are based on test results determined according to EN 779 or ISO 16890. The data are average values subject to tolerances due to normal production fluctuations. The figures are only suitable for comparison with those of other products tested according to the same standard.

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