Traveling Water Screen

TECHNICAL DATASHEET | WATER INTAKE SCREENING

Traveling Water Screen

Through-flow and dual-flow band screens for river, seawater and cooling water intakes

What is a traveling water screen? A traveling water screen, also called a travelling band screen or band screen, is a continuous loop of mesh panels that filters raw water at an intake. It lifts debris out of the flow and washes it off at the discharge point, protecting pumps, condensers, heat exchangers and downstream treatment from fouling and damage.

Through-flow and dual-flow designs

Mesh opening 1 to 10 mm

SS304, SS316L and duplex materials

Custom channel width and lifting height

Rockerhill traveling water screens, assembled and tested in the workshop.

Key facts

Also known as

Band screen, travelling band screen, travelling water screen, through-flow screen, dual-flow screen

Main function

Continuous removal of debris, vegetation, fish and marine growth from the water at an intake

Typical sites

Power plant cooling water intakes, seawater desalination intakes, river and lake raw water intakes, industrial process water

Manufacturer

Rockerhill Global Limited, China (established 2011), 17,000 m² manufacturing hub in Jiangsu, 18-month warranty

Screen frames in fabrication. Heavy steel frames and mesh sections are built to the channel drawing.

Chain and sprocket drive. Sprockets, chain and gear motor are assembled and aligned before shipment.

1

Water passes through the mesh

Raw water flows toward the intake. Debris larger than the mesh opening is held on the face of the mesh panels.

2

The band rotates

The drive unit moves the chain and mesh panels upward, carrying the retained debris out of the water.

3

Panels are washed

At the head section, the spray wash header cleans each panel while the debris falls into the trough.

4

Screenings are discharged

Washed debris flows to a trough or conveyor for disposal, and the clean panels return down into the channel.

5

Control starts the cycle

A timer or a differential water level sensor starts or speeds up the drive when the mesh begins to clog.

Water path

Water passes through the ascending run of the band in a single pass

Water uses both the ascending and descending runs of the band

Screening area

Standard for the channel width

Larger for the same channel width

Best for

Moderate flows, moderate debris loads, simpler civil works

Higher flows, limited channel width, heavier debris loads

Typical sites

River and lake intakes, industrial water

Power plant cooling water, large seawater intakes

Role

First-stage protection against large debris

Second-stage fine screening of the intake flow

Element

Fixed parallel bars with a raking mechanism

Continuous band of mesh panels

Typical opening

Larger, commonly 10 mm and above

Smaller, commonly 1 to 10 mm

Typical use

Pumping stations, plant inlets, trash protection

Cooling water, desalination and raw water intakes

Power plant cooling water

Protects condensers and heat exchangers from debris and marine growth

Dual-flow designs for large flows

Seawater desalination intake

Pretreatment ahead of pumps, filters and reverse osmosis

Duplex or 316L materials against corrosion

River and lake raw water

Protects pumps at water treatment plant intakes

Handles leaves, branches, vegetation and silt

Industrial process water

Steel, petrochemical, pulp and paper, mining

Mesh and materials matched to the process

Hydropower and irrigation

Keeps trash from turbines and canal gates

Often combined with trash racks and gates

Aquaculture

Separates solids from recirculating or intake water

Fine mesh and fish-friendly design

Channel width

1.0 to 6.0 m

Custom widths available

Lifting height (channel depth)

Up to about 30 m

Set by water level range and deck height

Mesh opening

1 to 10 mm

Finer meshes down to 0.2 mm for fine filtration

Through-screen velocity

0.5 to 1.0 m/s

Design value at the lowest water level

Band speed

2 to 10 m/min

Fixed or variable, depending on the debris load

Head loss across the screen

Typically below 0.3 m

Clean mesh, design flow

Drive power

1.5 to 15 kW

Motor and gear reducer, with overload protection

Spray wash pressure

3 to 10 bar

Wash pump supplied or by the owner

Control

Timer and differential level

Local panel, remote signals optional

Frame and chain materials

SS304, SS316L, duplex, coated carbon steel

Select by water quality and design life

Mesh panel materials

Stainless steel wire mesh, polymer mesh

Stainless steel is typical for seawater

1. Water source: river, lake, seawater or cooling water

6. Debris type: leaves, branches, plastics, fish, marine growth

2. Design flow rate (m³/h) and number of screens

7. Material requirement: SS304, SS316L or duplex

3. Channel width and depth, in mm or as a drawing

8. Installation: indoor or outdoor, climate range

4. Highest and lowest water level, and deck elevation

9. Power supply (voltage and frequency) and control needs

5. Required mesh opening (mm)

10. Delivery location, and any standards or documents required

Request a quotation

Rockerhill Global Limited is a China-based manufacturer of mechanical screens, gates and water treatment equipment for water intake and wastewater treatment. Established in 2011, with a head office in Beijing.

Website www.rockerhillcn.com

Phone +86 010 64758010

WhatsApp +86 157 5752 3989

Email Allie.s@rockerhillcn.com

Address Room 1722, Building 55, No.5 Yujing East Road, Tongzhou District, Beijing