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Water Environment Solutions


Removes impurities by rotating disks. Screen structure reduces clogging.


Solution for overflow of impurities in heavy rain

Following heavy rain or squalls, rainwater, including domestic sewage, may be directly discharged into rivers without treatment, carrying over various contaminants that can cause pollution in the river.
STORM SCREEN* and Storm Disk are high capacity fine-screen treatment units that can solve the problem of water pollution caused by storm water contamination of public water resources.


  1. Self-cleaning system
    • The scraper and disks are kept clean by the continuous rotation of the disks.
    • Debris and impurities are kept on the SWTP side without being deposited on the disks or scrapers.
    • The rotating disk and fixed scraper setup prevents debris and impurities from becoming stuck to the Storm Disk Type Screen.
    →Stable treatment capability
  2. Easy and quick installation
    It is possible to fit the equipment through a 600mm diameter manhole, making it easy to fit in a small space, such as an existing rainwater discharge chamber.


For debris and impurities in heavy rain


Item Basic specification
Screen depth 470mm 650mm 830mm
Axes 2 3 4
Capacity 0.3m3/s・m 0.55m3/s・m 0.87m3/s・m
Screen mesh
4mm or 6mm
Screen width 1mm, 1.25mm, 1.5mm, 1.75mm, 2mm
Motor power 0.4~1.5kW


As an option, a monitoring device can be installed.


STORM SCREEN is a registered trademark of Hitachi, Ltd. in Japan.
All specifications are subject to change without notice.