RF300 Self-cleaning Filters and Strainers

From £2,270.00 GBP

The RF300 self-cleaning filters and strainers attach to the suction intake of surface mounted pumps. The self-cleaning filter uses a continuous backwash to clean as water is pumped, preventing the intake screen from blocking.

The R300 is a tough stainless steel intake filter that protects pumps and other connected equipment form blocking and blinding.

It can be fitted with tough nylon or stainless steel filter mesh and can filter from 60 microns to 6 mm. The RF300AR can handle up to 560 litres per minute.

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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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
  • 35 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.

RF300 self-cleaning filters


RF300 Self-cleaning Filters and Strainers

RF400 self-cleaning filters - How they work

The Rotorflush RF300 self-cleaning filters and strainers are a mid-range filter, offering up to 150 US GPM or 560 litres a minute. 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.

RF300 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 mesh screens.

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 432 litres a minute.  The maximum flow rate for EPA Rule 316 (b) intake velocities of 0.5 ft per second is 648 litres a minute (170 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 (if using nylon mesh) to keep them running.

All our filters use a proportion of your surface mounted pump’s output to supply a feed to an internal back-washing rotor. This supply is taken off the already filtered pump output. The 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 16% of the pump output is required to supply the cleaning rotor.

For larger capacities, our RF400 self-cleaning filters deliver up to 1000 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.

Models & Specification

 RF300 Self-cleaning Filters and Strainers

General Characteristics RF300
Water supply to cleaning rotor Tapped from outlet of main pump
Maximum output (m3 /hour) 35
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 316 stainless-steel top mesh
Dimensions (diameter x height) (mm) 335 x 310
Weight (kg) 11
Suction pipe connection 2.5 ” BSP
Return pipe connection 1.25″ BSP
Operating Pressure (backwash) 0.3 bar – 0.5 bar backwash
Flow returned to filter for back-washing 112 litres / minute @ 0.4 bar

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

 RF300 Self-cleaning Filters Dimensions


Rf300 self-cleaning filter and suction intake for use in dirty water up to 150 US GPM
Rendered Image showing NPT fittings

RF300 Self-cleaning Filters – Construction

Component Material
Filter cage and lid 304 or 316 Stainless Steel
Central turbine 304 or 316 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 RF300 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 RF300 Self-cleaning Filters – up to 560 litres per minute, 150 US GPM
Rotorflush Filter Model No

316 Stainless Steel

Price £ (GBP – exc. VAT)

RF300AR Sintered stainless steel top mesh, 50,100 & 315 micron £2,270.00 (GBP)
RF300AR Stainless steel 1 mm or 2 mm woven mesh £2,270.00 (GBP)


Please state filter mesh type and size when ordering.

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

We can fit NPT connections if required

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 RF300 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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