RF400 Self-cleaning Filters and Strainers

From £3,685.00 GBP

The RF400 self-cleaning filters and strainers are for use on the suction side of surface mounted pumps. The RF400 is an extremely tough stainless steel basket filter that protects pumps and other connected equipment form blocking and blinding.

It can be fitted with tough nylon filter mesh or stainless steel screens and can filter from 60 microns to 6mm. The RF400AR can handle up to 1000 litres per minute.

The patented self-cleaning mechanism in the filter provides a continuous backwash keeping the filter mesh free of weed and debris.

The filter self-cleans whenever your pump is in operation and provides a very efficient low maintenance solution to pumping water contaminated with suspended solids.

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RF400 self-cleaning filters nylon and steel mesh strainers and filters

Key Features

  • Strong nylon filter mesh or stainless steel filter mesh
  • Filters from 6 mm down to 60 microns
  • High reliability, easy to use and install
  • Works with most centrifugal and progressive cavity pumps
  • 60 cubic metres per hour maximum flow
  • Reduced capital, installation and maintenance costs
  • All Stainless Steel construction
  • Protects pumps and other equipment
  • For use in dirty water.

RF400 self-cleaning filters


RF400 Self-cleaning Filters and Strainers

 RF400 self-cleaning filters - How they work

The Rotorflush RF400 self-cleaning filters and strainers are some of our most popular products. They are tough, versatile, easy to install and require minimal maintenance. They are used across a wide range of industries for all kinds of dirty water filtration. These filters will filter up to 1000 litres of dirty water per minute.

RF400 self-cleaning filters and intake strainers provide protection against blockage for surface mounted pumps and other connected equipment. These filters can be fitted with coarse stainless-steel filter mesh (1 mm – 6 mm) or finer sintered stainless steel or nylon mesh screens (50 microns – 315 microns).

When these filters are fitted with 2 mm woven stainless-steel mesh, the maximum flow rate that will comply with current regulations for Eel protection – at an intake velocity of 0.1 metres a second – is 540 litres a minute.  The maximum flow rate for EPA Rule 316 (b) intake velocities of 0.5 ft per second is 810 litres a minute (210 US GPM).

Their stainless-steel filter cages make them very strong, long-lasting, low maintenance strainers, requiring only the occasional jet wash or filter change to keep them running.

All our filters use a proportion of your pump’s output to supply a feed to an internal back-washing rotor. This supply is taken off the already filtered pump output. The twin jets of the cleaning rotor inside the filter rotate at about 60 rpm, clearing the whole screen every ½ second. As the cleaning mechanism is on the filtered side of the screen, debris in the water will not obstruct the mechanism.

Approximately 10 – 20% of the pump output is required to supply the cleaning rotor.

For larger capacities, our RF600 self-cleaning filters deliver up to 4,500 litres per minute, and we can custom-build larger self-cleaning filters to your specifications. All our filters and strainers use the same patented technology, providing efficient self-cleaning backwash to keep their filter mesh clear for a range of flow rates.

Alternatively, where your pump output is variable, or your pump has a variable speed drive, you may wish to use an RF400AR-E Strainer with its own backwash pump.

Models & Specification

 RF400 Self-cleaning Filters and Strainers

General Characteristics RF400
Water supply to cleaning rotor Tapped from outlet of main pump
Maximum pump output (m3 /hour) 60
Standard coarse screen mesh aperture 3 mm or 6 mm perforated 304 stainless steel
1 mm or 2 mm woven 316 stainless-steel mesh
Standard fine screen mesh aperture 60, 115 or 300 micron bias cut nylon mesh
50, 100 or 315 micron sintered stainless-steel top mesh
Dimensions (diameter x height) (mm) 420 x 354
Weight (kg) 19
Suction pipe connection 3 “
Return pipe connection 1.5″
Operating Pressure (backwash) 0.3 bar – 0.5 bar backwash
Proportion of pump output back-washing (m3/hour) 6.0 – 9.0

RF400 self-cleaning filters showing connections - perforated steel mesh RF400RRF400 self-cleaning filters showing connections - nylon mesh RF400A

 RF400 Self-cleaning Filters Dimensions

RF400 self-cleaning filters rendered dimension drawing 1
RF400 self-cleaning filters dimension drawing 2
RF400 self-cleaning filters dimension drawing 3

RF400 Self-cleaning Filters – Construction

RF400 self-cleaning filters - cool pic RF400AR woven steel mesh

Component Material
Filter cage and lid 304 Stainless Steel
Central turbine 304 Stainless Steel
Jets Food grade natural rubber
Bearings Acetal copolymer
Standard coarse screen 3 mm or 6 mm perforated 304 stainless-steel

1 mm or 2  mm woven 316 stainless-steel mesh

Standard fine screen 50, 100 or 315 micron sintered stainless-steel top mesh

60, 115 or 300 micron bias cut nylon mesh

Note: 316 Marine grade stainless steel is an option for all RF400 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.



RF400 self-cleaning filters v smart RF400R with perforated mesh

Rotorflush RF400 Self-cleaning Filters – up to 1000 litres per minute
Rotorflush Filter Model No

316 L Stainless steel

Price £ (GBP – exc. VAT)

RF400AR Sintered stainless steel top mesh, 50,100 & 315 microns £3,685.00
RF400R 3 mm or 6 mm perforated mesh £3,685.00
RF400AR Stainless steel 1 mm or 2 mm woven mesh £3,685.00


Please state filter mesh size:

60, 115 or 300 micron bias cut nylon mesh is available and 50, 100 and 315 sintered stainless-steel mesh

Standard fittings are 3 inch BSP outlets, and 1½ inch BSP inlet to the backwash.

If NPT connections are required, please state when ordering, and we can fit adaptors.

Please note:

Delivery is by carrier.  Contact us for latest lead times.

Carriage and packing charges are extra.

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    Below is the technical and maintenance information for the RF400 Self-cleaning Filters and Strainers

    ...Frequently Asked Questions

    We know you'll have plenty of questions about how things work, what kind of questions to ask us and what we'll ask you. We also have downloadable information across the range of our products as well as a specific information on Filtration Knowledge.

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