7/28/2019 Hydro Intl- CSO Hydro-Static Screen Non-Powered Screen

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Ph: 207.756.6200 Fax: 207.756.6212 Email: csoinquiry @hil-tec h.com

w w w . h y d r o - i n t e r n a t i o n a l . b i z

w e t w e a t h e r

Hydro-Static Screen

Cost effective floatables control system with partial cleansing capabilities

A D VA N TA G E S

No power required

No moving parts

Economical screening solution

Patented ow-modiying componentsprovide partial cleansing

Removal o debris down to 4mm intwo directions

Mesh screen panels are coated in anon-stick polymer

Mesh screen panels are corrugated to increaseow-through capacity

H O W I T W O R K S

During dry weather conditions the ow to the treatment works willpass underneath the screens in the dry weather ow channel.

In a storm event the inow rate to the chamber will exceed theoutow rate causing water levels to rise within the chamber and spillthrough the screens.

The Hydro-Static Screen is mounted over the dry weather owchannel so that the ow passes up and through the screen during astorm event (red arrows). Solids and oatables are trapped below thescreen and returned to the sanitary continuation ow (brown arrow).Screened euent is discharged to a receiving waterway (blue arrow).

An emergency overow weir is incorporated into the screen shouldthe peak design ow be exceeded.

High Capacity

Wet Weather Screen

The Hydro-StaticScreen is a non-powered screening technologysuitable or sites with inrequent overows.

With a small ootprint and a low capital cost, the Hydro-StaticScreen oers an economically sustainable screen or projects withlimited budgets.

A P P L I C AT I O N S

CSO sites with inrequent spills

Floatables control within collectionsystems

Retrofts or new CSO screening acilities Up Flow Configuration Shown

Debris does not stick to the polymer coated corrugated

mesh screens.

Mesh screensScreened euent

Dry weather ow channel

Continuation o

Bae

Inlet

Emergencyoverow weir

7/28/2019 Hydro Intl- CSO Hydro-Static Screen Non-Powered Screen

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Hydro International 94 Hutchins Drive Portland, ME 04102

CSO_SS_HSS_7-29-08 Hydro International 2008

abcdefCerticate No. 961366

w e t w e a t h e r

This information is subject to change without notice.

Hydro-StaticScreen

M a i n t e n a n c e

For more inormation please call our ofce toll ree at 800-848-2706or inquire at www.hydro-international.biz.

The Hydro-Static Screen is available as either an Up Flow Screen or a Through Flow Screen.

C o n f i g u r a t i o n s

Patented ow-modiying baes provide partialcleansing in the Up Flow confguration minimizingmaintenance requirements.

The mesh screen panels are coated in a non-stickpolymer to keep debris rom sticking to the screen.

The Hydro-Static Screen is unique because o owmodiying components which enhance the naturallyoccurring recirculation patterns and thereore reducethe blinding eect when the screen is in operation.

Further design considerations include:

Site details

Wet weather ow rates

Spill requency

D e s i g n R e q u i r e m e n t s

The Hydro-Static Screen is sized or a loading rateo 148 gpm/t2 (100 l/s/m2).

The Hydro-Static Screen is oered as a package with thecomponents pre-installed in a pre-cast concrete chamber.

Through Flow Screen

The Through FlowHydro-Static Screen is oset rom thevertical to encourage screenings to drop away rom the

corrugated mesh once the storm has subsided.

Up Flow Screen

The Up FlowHydro-Static Screen in the Upow confguration ismounted horizontally over the dry weather ow channel so that the

ow passes up and through the screen in a storm event.

Recirculation of ow paths shown through CFD modeling of theHydro-Static Screen

TheHydro-Static Screen is well suited for retrots.