RF800LW Self-cleaning Eel Screen & Intake Strainer

From £6,975.00 GBP

The RF800LWs are extremely tough stainless steel self-cleaning basket filters that protect pumps and other connected equipment from blocking and blinding when pumping dirty water. When fitted with 2 mm mesh they are ideal EA Eel regulation compliant Eel screens.

The RF800LW self-cleaning Eel Screening intake strainers provide industrial strength, low maintenance filtration for surface mounted pumps. They are coarse screened filters fitted with 1 mm - 6 mm stainless steel mesh screens.

Our award-winning self-cleaning mechanism in the filters provides a continuous backwash keeping the filter mesh free of weed, debris and other suspended solids, and their low intake velocity protects elvers, and other aquatic wildlife.

The RF800LWs can handle 277 m3 to 1085 m3 per hour.

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Key Features

  • 316 Stainless Steel filter mesh
  • Filters from 1mm to 6mm
  • Reliable and easy to install and use
  • Works with most centrifugal and progressive cavity pumps
  • 1085 cubic metres per hour maximum flow
  • 542 cubic metres per hour maximum flow @ 0.1 metres / sec
  • Capital, installation and maintenance costs reduced
  • All Stainless Steel construction
  • Option for marine grade steel.

RF800LW Self-cleaning Eel Screen


Description

RF800LW Self-cleaning Eel Screen & Intake Strainer

RF800LW Self-cleaning Eel Screen Intake Strainers are designed for use on the suction hose of surface mounted pumps. They can also be used as gravity fed intakes as long as a pump is used to supply the backwash. Most new and renewed abstraction licences require measures to be put in place for the Protection of European Eels. Rotorflush RF800LW Self-cleaning Eel Screens have been specifically designed to meet this requirement.

RF600LW Self-cleaning Eel Screen - how it works

 

The RF800LW Self-cleaning Eel Screen Intake Strainers are the highest capacity self-cleaning strainers Rotorflush offer. They can deliver a maximum of 217 m3/ hour – 1085 m3 / hour through tensioned woven Stainless Steel mesh. The maximum flow rates for RF800LW screens for elvers and glass eel protection range from 108 m3 / hour – 542 m3.  This reduction is so that the intake velocity of the water does not exceed 0.1 metres a second.

The RF800LW range of Eel screens can be fitted with 60% open area  1 mm or 2 mm woven 316 Stainless Steel filter mesh. The mesh is under tension and forms the body of the screen, maximising the mesh area.

The self-cleaning mechanism in our filters and strainers uses a proportion of your pump’s output to supply a feed to an internal backwashing rotor. Rotorflush self-cleaning eel screens are powered by taking a ‘T’ off the already filtered pump output to supply the Rotorflush internal rotors. The cleaning rotors push away anything that might cause the mesh to block with a continuous backwash.

Alternatively the mesh can be kept clear by using a small backwash pump to drive the cleaning rotors. This allows the self-cleaning Eel Screens to be gravity fed, as is the case with many raw water intakes from rivers.

Rotorflush filters and strainers are all fitted with our patented self-cleaning technology, delivering an efficient backwash to keep their filter mesh clear and to protect aquatic life.


Models & Specification

RF800LW Self-cleaning Intake Strainer – General

There are nine models of RF800LW self-cleaning eel screens & intake strainers offering a broad range of capacities

Flow Rates and Capacities

 Rotorflush ModelFilter screen Area cm2Maximum Flow Rate m3/hr (net of backwash)Eel Regulations
Flow rate (net of backwash)
m3/hr @ 0.1 m sec
*
Backwash Flow Rate m3/hrBackwash PressureMesh: 1 mm – 6 mm, min % Open Area
RF800-200LW5,02521710890.4 bar60
RF800-300LW7,54032516213.50.4 bar60
RF800-400LW10,050434217180.4 bar60
RF800-500LW12,56554227122.50.4 bar60
RF800-600LW15,080651325270.4 bar60
RF800-700LW17,59076038031.50.4 bar60
RF800-800LW20,105868434360.4 bar60
RF800-900LW22,61597748840.50.4 bar60
RF800-1000LW25,1301,85542450.4 bar60

*Approach velocity recommended for EPA 316(b) and Regulations for the Protection of European Eels

RF800LW self-cleaning Eel screen in production
An RF800-900LW Eel Screen in Production

 

All Stainless steel inside and out
View from above

Rotorflush filters can customise these filters. Mesh types and outlet flange sizes can be varied to suit particular applications. Please contact us to discuss your requirements.


RF800LW Self-cleaning Intake Strainer – Dimensions

ModelH1 Total Height mmH2 Mesh Height mmD1 Total Diameter mmD2 Mesh Diameter mmD3 Flange Diameter mmApprox Weight kgs
RF800-200LW575200950800405190
RF800-300LW675300950800405200
RF800-400LW775400950800405210
RF800-500LW875500950800405220
RF800-600LW975600950800405230
RF800-700LW1,075700950800405240
RF800-800LW1,175800950800405250
RF800-900LW1,275900950800405260
RF800-1000LW1,3751,000950800405270

RF800-900LW self-cleaning Eel Screen being deployed at a raw water intake at water treatment works
Installing an RF800-900LW Eel screen at a Water Treatment Works intake


RF800LW Self-cleaning Intake Strainer – Construction

 

RF800LW Insides and out

 

RF800LW and RF600LW Tensioning Rods

 

RF800LW detail mesh and flange

Filter ComponentConstruction
2mm aperture filter mesh316 Stainless Steel or Phosphor Bronze
Filter uprights304 or 316 Stainless Steel
Filter top and bottom plate304 or 316 Stainless Steel
Top and bottom plate bolts & fastenings304 or 316 (A2 or A4)  Stainless Steel
Tensioning nuts, M20 x 6, 15mm thickPhosphor Bronze PB 102
Cleaning rotor304 or 316 Stainless steel
Cleaning jet restrictorsABS
Rotor bearingsAcetal
Top and bottom rotor bearings304 or 316 Stainless steel
Rubber jetsNatural Rubber
Rubber jet clips304 or 316 Stainless steel
Lifting eyes304 or 316 Stainless steel
Top flange304 or 316 Stainless Steel, standard is DN 200 PN 16, other sizes may be fitted
Backwash connection316 Stainless Steel, 3” BSP
Tensioning assembliesHi-tensile steel, Delta Tone 9000® inorganic, non – electrolytically applied micro layer zinc – Lamella flake coating

Note: 316 Marine grade Stainless Steel is an option for all RF800LW filters


Please Note: Our filters are designed for use in dirty water or liquids with a viscosity close to that of water. Our filters and filterpumps are NOT suitable for use in raw sewage or any other dirty water which contains oils or fat.


Ordering

Rotorflush RF800LW Self-cleaning Intake Strainer – up to 301 litres per second
ModelPrice £ (GBP – exc. VAT) ModelPrice £ (GBP – exc. VAT)
RF800-200LW£6,975.00RF800-700LW£8,330.00
RF800-300LW£7,220.00RF800-800LW£8,630.00
RF800-400LW£7,455.00RF800-900LW£8,910.00
RF800-500LW£7,860.00RF800-1000LW£9,190.00
RF800-600LW£8,090.00Prices for standard Screens with304 Stainless steel, 10″ outlet

Deployment of RF800LW Eel Screen

Please state filter mesh size:

1 mm – 6 mm woven Stainless Steel mesh is available

Standard fittings are 10″  PN 16 outlet, and 3″ inch BSP inlet to the backwash.

Other flange sizes can be fitted

These filters can be manufactured using 316 Stainless Steel for marine use, please enquire.


Please note:

Delivery is by carrier and is usually between 5 and 7 weeks from order depending on product and availability.

Carriage and packing charges are extra.

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Below is the technical and maintenance information for the RF800LW Self-cleaning Eel Screen & Intake Strainer

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