3 FSM Dual Flow Screen

The specialists for environmental technology

FSM - Dual Flow Screen

    The FSM Dual Flow Screen was developed to deal with particular problems associated with waste water pre-treatment and raw water intake.

    FSM is working in this field since 1973. The first machines are used to generate cooling water for power plants and pulp and paper mills from rivers.
    Parallel to the increasing demands of users, FSM introduced modifications to the basic design. These have resulted in an optimum product for the preliminary treatment of waste or river (sea) water - providing high performance coupled with low operating costs. The Dual flow screen is a very fine screen with a high screenings capture rate and excellent protection for membrane systems.

    Functional principle:
    The unscreened waste water flows from both sides through the filter elements.
    The outlet is make by an opening in the frame which is located in the middle of the screen frame. The filter elements form a continuous filter belt which is cleaned by a spray bar at the upper deflection point.
    The cleaning process can be assisted by a optional brush in dependence on the screenings load. The water flows through the screen elements which are covered either by a woven wire mesh made of stainless steel with up to 3 mm openings or with perforated plates from 1 up to 12 mm openings which create a barrier to the passage of suspended contaminants and removes them for disposal. With mesh maller 3 mm the horizontal space between the adjoining panels is positively ealed to prevent solids escaping hru the gap as would be the case if it was not sealed.  The screenings can be discharged into containers, screening washing press, screw conveyors, etc. The screen element and screen frame are sealed at the sides to prevent solids from circumventing the filter. The filter elements can be individually and quickly exchanged for ease of maintenance.



Applications - Dual Flow Screen

    Applications in municipal and industrial clarification plant
    • Waste water pre-treatment / fine screening
    • Membrane treatment plant

    Applications in power stations
    • River or sea water screening

    Applications in potable water treatment plants
    • River or sea water screening

Features, Dimensions and Material


    • High reliability and ensured continuity of operation resulting from robust construction
    • Design caused no carry over effect of screenings to the downstream side
    • Filter elements optimally cleaned by a spray bar and optional by a brush
    • Screenings conveyed positively to the discharge point
    • Screenings conveyed positively to the discharge point
    • Excellent cost/performance ratio
    • Low maintenance costs
    • Suitable for outdoor sites / operation in winter
    • Easily adapted to suit changed operating conditions
    • Machine completely enclosed for optimum odor control


    filter width
    300 to 5000 mm
    shaft center distance up to 15000 mm, larger sizes on request
    filter element mesh size 0,5 to 3 mm, other sizes on request
    filter element perforation 1 to 12 mm, other sizes on request
    mounting angle 90°


    machine frame stainless steel SS304 or SS316, other materials on request
    filter element stainless steel SS304 or SS316, other materials on request
    chains wear resistant steel or wear resistant stainless steel
    rollers PA, wear resistant steel or wear resistant stainless steel
    chain sprockets wear resistant steel or wear resistant stainless steel
    chain supports stainless steel SS304 or SS316, other materials on request
    side sealing HDPE
    drives geared motors, make SEW   
    use with sea/brackish water sea water resistant material for screen frame, filter panels, chains, sprockets


Weltweit zufriedene Kunden.

Wir sind seit vielen Jahrzehnten die Spezialisten der Wasser- und Abwasserreinigung und haben unzählige Projekte im In- und Ausland erfolgreich ausgeführt.

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Your contact

Consulting & Support

FSM Frankenberger GmbH

Operating facility Pohlheim

Vor dem Hohen Stein 1
D-35415 Pohlheim

+49 (0) 64 04 - 91 94 0
+49 (0) 64 04 - 91 94 91

Tried and trusted products

Productive throughout the range: technological mastery and the very best service.


Understanding enquiries and problems in order to develop specifically targeted solutions.

Used throughout the world

Exciting projects successfully implemented in over 20 countries on 5 continents.

Trimmed for throughput

High throughput, reliability and service quality. Fully developed concepts for the high demands of daily realities.

Sustainable concept

Thinking about tomorrow today. We have been developing products designed to be sustainable, flexible and durable with this in mind for 50 years.

Innovative design

Integrated solutions at the highest technological level, seamlessly adapted to the existing workflow by our engineers.

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