Overflow Screens for Sewerage

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APPENDIX C1 - DATA SHEETS

OVERFLOW SCREENS FOR SEWERAGE

SYSTEMS & SEWAGE TREATMENT WORKS

PROJECT TITLE (P) / DOCUMENT REFERENCE (P)
PROJECT NUMBER (P) / REVISION (P)
PROJECT LOCATION (P) / DATE (P)
SCREEN SUPPLIER (P/S) / REFERENCE DRAWINGS INCLUDED (Y/N) (P)
TAG NO/ASSET CODE (P)

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* - Indicates Purchaser’s default requirement

2.0 GENERAL

2.3 General

1 / Screen Type () (P/S)
Static Screens
Perforated plate
Wedge wire
Self-Cleaning Screens
Flushing
Brushed
Self-powered drum
Powered Screens
Band
Brushed/spiral
Flushing

3.0 OPERATING ENVIRONMENT, SITE DETAILS & OVERFLOW CONFIGURATION

3.1 Operating Environment and Site Details

1 / Operating Environment (P)
Site/Screen Location ()
Inland
Coastal
Above ground
Under ground
Hazardous Area Classification ()
None
Zone 1
Zone 2
EMC Environment ()
1st environment – C1
1st environment – C2
2nd environment – C3
2 / Electrical Supply to Site () (P)
None
400 V, 3 phase, 50 Hz
Other (specify)
3 / Special Access Restrictions (P)

3.2 Overflow Configuration

1 / New or Existing Overflow (P)
New/existing
2 / Type of Overflow () (P)
Low sided weir
High sided weir
Stilling pond
Storage tank (on-line) (inlet)
Storage tank (on-line) (outlet)
Storage tank (off-line) (inlet)
Storage tank (off-line) (outlet)
STW storm tank (inlet)
STW storm tank (outlet)
Pumping station wet well
Other (specify)
3 / Dimensions of Access Shaft and Overflow Chamber (m) (P)
Shaft diameter/size
Shaft depth
Chamber diameter/size
Height from weir crest to underside of chamber roof
Weir height
Inlet/outlet pipe diameters

3.2 Overflow Configuration (contd.)

4 / Overflow Weir Characteristics (P)
Number of Weirs
1/2
Weir Dimensions (m)
Length/width
Profile
Flat/crested
5 / Dimensions of Area Available (in Plan View) for Screen Installation (m) (P)
Length/width
6 / References for Further Information (P)

4.0 PROCESS INFORMATION

1a / Influent Source (P)
Rural/urban
Industrial/domestic split
Other (specify)
1b / Maximum Flow Rate to be Screened (l/s) (P)
1c / Catchment PE (P)
1d / Average Screenings Loading
(m3/1000 PE/day) (P)
1e / Peaking Factor (P)
2 / Unusual Influent Characteristics (P)

5.0 PERFORMANCE SPECIFICATION

5.1 General

1 / Service Life (years) (P)
2 / Ambient Air Temp/RH (10 to 40°C/< 95%*) (P)

5.2 Process Performance

5.2.1 General

2 / Size of Screenings Removed(> 6 mm in 2D*) (P)
3 / Mode of Screen Cleaning (Automatic*) (P)
4 / Maximum Possible Head Differential (m) (P)

5.2.2 Hydraulic Performance

1 / Blinding Factor (P/S)
2 / Influent Velocity Through ScreenCurtain Apertures at Maximum Flow Rate (m/s)
Maximum Allowable(1.2m/s*) (P) (P)
Design (S)
3 / Working Head Loss at Maximum Flow Rate (mm) (P/S)
Maximum Allowable (P)
Design (S)

5.2.3 Screenings Retention Value (SRV)

2 / SRV (%) (P/S)
Minimum acceptable (P)
Measured at Wigan (S)

5.3 Life Cycle Costs

5.3.1 Energy Consumption (If Appropriate)

1 / Energy Consumption(kWh/hr) (S)

5.3.2 Service Lives and Costs of Components

1 / Expected Service Lives of Components
Component (specify) (P) / Life (x 103 hrs) (S)
2 / Costs of Components (£)/Time Required to Replace Components (hrs) (S)
Component (specify) / Cost / Time

6.0 DESIGN SPECIFICATION

6.1 General (All Screen Types)

6.1.2 Weights and Lifting Arrangements

1 / Weights of Major Components (S)
Component (specify) / Weight (kg)
1 / Heaviest maintenance lift (kg) (S)
1 / Heaviest erection lift (kg) (S)

6.1.5 Screen Curtain Support Structure

2 / Material(s) (P/S)

6.1.6 Drive Systems (If Required/Provided)

6.1.6.2 Motors/Gearboxes (If Required/Provided)

Refer to Appendix C2.

6.1.6.3 Hydraulic Drives (If Required/Provided)

1 / Hydraulic Drive to Operate (P/S)
2 / Rating (S)
Motor rating (kW)
Maximum operating pressure (bar)
3 / Hydraulic Power Pack (P/S)
b / Control panel spec. (WIMES 3.04*)
c / Motor specification (WIMES 3.03*)
d / Coating specification (WIMES 4.01*)
5 / Hydraulic System (P/S)
a / Oil reservoir capacity (l)
b / Maximum oil pump delivery (l/min)
7 / Further Measures Required to Reduce Impacts of Oil Spillage (P)
8 / Rigid Pipework Type () (P/S)
Seamless
Fully welded
8 / Rigid Pipework Material () (P/S)
Stainless steel
Carbon steel
10 / Type of Hydraulic Oil (P/S)

6.1.7 Bearings and Lubrication

6.1.7.2 Rolling Element Bearings

3 / Requirements for Split Type Bearings (P)

6.1.7.3 Lubrication

1 / Bearing Lubrication Philosophy () (P/S)
Sealed for life
Manual re-greasing
Automatic re-greasing
5 / Minimum Capacity/Life of Auto Grease Dispensers (cc/mths) (P/S)

6.1.9 Information Plate

1 / Additional Information Reqd. on Plate (P)
2 / Duplicate Plate Required (Y/N) (P)
2 / Location of Information Plate (P)

6.1.11 Control Panel and Associated Electrical Installation

1 / Control Panel Required/Provided (Y/N) (P/S)
2 / Control Panel Specification () (P)
WIMES 3.04*
Supplier’s standard
Purchaser’s standard

6.1.13 Theft Prevention

1 / Painting of Stainless Steel Components Required (Y/N) (P)

6.1.14 O & M Manuals

1 / Reference for Particular Specification (P)

6.2 Static Screens

6.2.1 Static Perforated Plate Screens

6.2.1.1 General

1 / Direction of Flow Through Screen () (P/S)
Upwards
Downwards
Sideways (weir mounted)

6.2.1.2 Screen

1 / Screen Element Material (P/S)
2 / Aperture size (mm) (P/S)
3 / Screen Installation Free Area (%) (S)
4 / Plate Thickness (mm) (S)

6.2.1.3 Screen Cleaning System

1 / Rotating Spray Bar Required (Y/N) (P)

6.2.2 Static Wedge Wire Screens

6.2.2.1 General

1 / Direction of Flow through Screen () (P/S)
Upwards
Downwards
Sideways (weir mounted)

6.2.2.2 Screen

1 / Screen Element Material (P/S)
2 / Aperture size (mm) (P/S)
3 / Screen Installation Free Area (%) (S)
4 / Wedge Wire Dimensions (mm) (S)
Profile wires
Support rods

6.2.2.3 Screen Cleaning System

1 / Rotating Spray Bar Required (Y/N) (P)

6.3 Self Cleaning Screens

6.3.1 Flushing Screens

6.3.1.1 General

1 / Direction of Flow through Screen () (P/S)
Upwards
Downwards
Sideways (weir mounted)

6.3.1.2 Screen

1 / Screen Element Material (P/S)
2 / Aperture size (mm) (P/S)
3 / Screen Installation Free Area (%) (S)
4 / Plate Thickness (mm) (S)

6.3.1.3 Screen Cleaning System

1 / Type of Device or Mechanism Required/ Provided () (P/S)
Siphon
Other (specify)

6.3.2 Brushed Screens

6.3.2.1 General

1 / Direction of Flow through Screen () (P/S)
Upwards
Downwards
Sideways (weir mounted)
3 / Angle of Inclination of Screen to Weir (P/S)

6.3.2.2 Screen

1 / Type of Screen Construction () (P/S)
Perforated plate
Wedge wire
2 / Screen Element Material (P/S)
3 / Aperture size (mm) (P/S)
4 / Screen Installation Free Area (%) (S)
5 / Plate Thickness (mm) (S)
6 / Wedge Wire Dimensions (mm) (S)
Profile wires
Support rods

6.3.2.3 Screen Cleaning System

General

1 / Type of Device or Mechanism Required/ Provided () (P/S)
Waterwheel driven rotating brush
Other (specify)
2 / Number of Brushes (S)
2 / Bristle Details (S)
Length (mm)
Diameter (mm)
Material
No. per unit area
3 / Method of Brush Adjustment (S)

Waterwheel Driven Rotating Brush (If Required/ Provided)

2 / Minimum ‘Head-Room’ Available to Drive Waterwheel (m) (P)
3 / Dimensions of Space Available for Installation of Waterwheel (m) (P)
4 / Waterwheel Material (S)
4 / Waterwheel Dimensions (S)
Width (mm)
Diameter (mm)
5 / Speed of Rotation of Waterwheel at max. Flow to be Screened (rpm) (S)
5 / Minimum Head/Flow Rate required To Rotate Waterwheel (m or l/s) (S)

6.3.3 Self-Powered Drum Screens

6.3.3.2 Screen

1 / Screen Element Material (P/S)
2 / Aperture size (mm) (P/S)
3 / Screen Installation Free Area (%) (S)
4 / Plate Thickness (mm) (S)

6.4 Powered Screens

6.4.1 Band Screens

6.4.1.1 General

1 / Direction of Flow through Screen () (P/S)
Upwards
Downwards
Sideways (weir mounted)

6.4.1.2 Screen

1 / Screen Element Material (P/S)
2 / Aperture size (mm) (P/S)
3 / Screen Installation Free Area (%) (S)
4 / Screen Element Thickness (mm) (S)
6 / Drive Chain Type () (P/S)
Conveyor chain
Roller chain
6 / Drive Chain Breaking Load (kN) (S)

6.4.1.4 Screen Cleaning System

2 / Brush Diameter (mm) (S)
2 / Bristle Details (S)
Length (mm)
Diameter (mm)
Material
No. per unit area
3 / Method of Brush Adjustment (S)

6.4.2 Brushed/Spiral Screens

6.4.2.1 General

1 / Direction of Flow through Screen () (P/S)
Upwards
Downwards
Sideways (weir mounted)
3 / Angle of Inclination of Screen to Weir (P/S)

6.4.2.2 Screen

6.4.2.3 Screen Cleaning System

General

1 / Method of Screen Cleaning Required/ Provided () (P/S)
Reciprocating brush assembly
Rotating Screw
Other (specify)

Reciprocating Brush Assembly (IfRequired/Provided)

2 / Number of Brushes (S)
2 / Bristle Details (S)
Length (mm)
Diameter (mm)
Material
No. per unit area
3 / Method of Brush Adjustment (S)
4 / Type of Drive System Required () (P)
Motor/gearbox
Hydraulic drive system
5 / Support Structure Material (P/S)

Rotating Screw (If Required/Provided)

2 / Type of Screw (P/S)
Shafted/shaftless
3 / Screw Dimensions (S)
Nominal diameter (mm)
Effective length (m)
4 / Screw Material (P/S)
5 / Brushes Required on Outer Edges of Screw (Y/N) (P/S)
5 / Method of Brush Adjustment (S)
7 / Screenings Discharged Into () (P)
Continuation flow
Screenings Handling System

6.4.3 Flushing Screens

6.4.3.1 General

1 / Direction of Flow through Screen () (P/S)
Upwards
Downwards
Sideways (weir mounted)

6.4.3.2 Screen

1 / Screen Element Material (P/S)
2 / Aperture size (mm) (P/S)
3 / Screen Installation Free Area (%) (S)
4 / Plate Thickness (mm) (S)

7.0 INSPECTION AND TESTING

7.1 Factory Acceptance Testing

1 / Reference for Particular Specification (P)

7.2 Site Acceptance Testing

1 / Reference for Particular Specification (P)

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APPENDIX C2 – DRIVE SYSTEM DATA SHEET

(TO BE COMPLETED FOR EACH MOTOR/GEARBOX ASSEMBLY)

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Drive No.:

1 / Driven Equipment (P/S)
2 / Type of Drive () (P/S)
Fixed
Dual speed
Variable
3 / Method of Power Transmission from Drive System to Driven Assembly() (P/S)
Close coupled
Chain
Belt
Other (specify)
4 / Method of Mechanical Overload Protection for Drive System () (P/S)
Current monitoring
Torque limiting coupling
Other (specify)
5 / Local Inching Facility () (P)
Required (Y/N)
Forward
Reverse
7f / IEC Input Design Required (Y/N) (P)
8 / Gearbox Specification (S)
Manufacturer
Type (e.g. helical)
Number of stages
Final Drive ratio
Service factor
Efficiency (%)
9 / IP Rating (P/S)

Drive No.:

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APPENDIX D – SUPPLIER’S SUPPLEMENTARY DATA SHEET INFORMATION

Clause / Supplementary Information

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