Coalescer prefilters Full Size hydroMaxx
Coalescer prefilters

Full Size hydroMaxx

Optimum protection against water and salt ingress

Viledon Full Size hydroMaxx reverse pocket filters offer excellent coalescing properties with front-of-filter drainage effect. Ideally suited for applications with constant water spray or fogging.

Applications Features
Article Article number Dimensions (W x H x D) [mm] Class to ISO 16890 Filter class acc. to ISO 29461-1 Filter class acc. to EN 779:2012 Initial gravimetric arrestance [%] Water retention capacity acc. to ISO 29461-2 [%] Nominal volume flow
Initial pressure drop [Pa]
HYDROMAXX 1/1 6R W4 53628795 592 x 592 x 350 ISO coarse 70% ISO T4 G4 72 >99 4,250 55
HYDROMAXX 1/2H 6R W4 53628794 592 x 287 x 350 ISO coarse 70% ISO T4 G4 72 >99 1,950 55
Water repellent coating
Water repellent coating
Easy installation
Easy installation
Moisture-resistant up to 100% relative humidity
Moisture-resistant up to 100% relative humidity


Viledon Full Size hydroMaxx reverse pocket filters are a powerful generation of coalescer filters. Offering high operational reliability and cost-efficiency they provide optimum protection of the following filter stages for keeping them dry. They are ideally suited for intake air prefiltration at coastal, offshore and other high humidity locations of

  • gas turbines in power generation and in the oil and gas industry

  • compressors

  • diesel and gas engines 

  • and for ships and cruise liners


  • Full Size hydroMaxx pocket filters offer four main benefits in one filtration concept.

  • The reverse media’s hydrophobic, progressive nonwoven composition functions as a reliable coalescer for water droplets and high humidity.
    This feature enables the water droplets to combine and drain down from the vertical pockets. Thus salt and hydrocarbon ingress will be substantially reduced.

  • Superior dust handling. Thanks to the reverse media concept, dust is not readily stored as in a traditional pocket filter. The Full Size hydroMaxx utilizes a self-supporting, integrated plastic cage system to optimize performance. Therefore the draining water washes off the dust captured on the filter media.

  • Maximized functional reliability thanks to the leak-proof welded edge configuration of the filter pockets, foam-sealed into a PUR front frame, and dimensionally stable construction of the filter element as a whole.

  • Various 2-in-1 filtration system solutions with other pocket or cassette filters. This design allows close coupling to either the intermediate or the final filter without any structural modifications.