The main design benefit of the self-clean filter range is that it can be serviced without being dissembled. 

W 51000 image2Overview

  • Self-cleaning fuel filter separator
  • 2" BSP or DN50 Pn16 flanged ports
  • 250, 500, 750 and 1000 micron options
  • Flow rates up to 333 lit/min 

The flow of fluid through the unit is not interrupted and consequently neither is the operation of the system/engine it is filtering for.

This automatic system can then be controlled by a timer; or for fully automatic operation by a pressure switch mounted on the output side filter. This would then trigger cleaning due to excessive pressure loss caused by a dirty filter.


Product Range


W-51000 range Filtration (micron) Details
W-51000/1 1000 micron (1mm) 2” Ports, Metal bowl
W-51000/075 750 micron
W-51000/05 500 micron
W-51000/025 250 micron
W-51000/1F 1000 micron (1mm) DN50 Pn16 2” Ports, Metal bowl
W-51000/075F 750 micron
W-51000/05F 500 micron
W-51000/025F 250 micron


Servicing and Technical Specifications



  • Make sure that the fluids are compatible with the filter material.
  • Follow the flow direction according to the arrow printed on the filter.
  • Make certain that the input/output piping is aligned and that there are no obstacles or restrictions inside.
  • Install the filter on a hard surface and avoid soft materials such as plastered walls.
  • Install the filter with the cleaning handle (flywheel) turned upwards.
  • We recommend installing a bleeding valve in the closed circuit to avoid overpressure due to the fuel temperature variations.



 To clean the filter, simply twist the handle at the top of the unit – this process can be manual or automatic (motorised using a variable speed drive).

See product service and support page


  • W-51000 Threaded 2" UNI-ISO 7/1
  • W-51000F Flanged DN50 Pn16 ISO 7005
  • Max operating pressure 4 bar
  • Max operating temperature 120°C
  • Fuel: Diesel oil and heavy oil
  • Filtering degree: 250 - 1000μm
  • Drain plugs: Rp 1"1/4 (gal steel)
  • Pipe pressure plugs: Rp 1/4" (brass)

Aluminium filter body and cover, filter elements in carbon steel, brass control shaft bushing, viton sealing o-ring, control and check shaft of the scraper in steel, hand-wheel for the filtering element cleaning out of plastic anti-shock material.

Optional Installation of one or two 300W heating elements (230V/50Hz - IP65). With a temperature range of 0 to 90°C, and a fixed limited temperature of 100°C. This device has an electrical insulation of IP40 Filter elements manufactured in 304 stainless steel. Electric reducer for cleaning to the filtering unit: Rotation speed: 1 RPM Torque: 50 Nm, Power consumption: 90 W Type of motor: connection for single or three phase, Electrical insulation: IP54 An intermittent cycle is recommended for longer filtering life.

Other sizes are available in the self clean range, from 1/2" ports to 2" ports - please ask for details.

Need help selecting a filter?

See our guide to help you select the most suitable filter for your needs.

Technical Support

How it works

See how the Separ filter works to separate water and particulate from fuel. 

SWK2000 flow diagram transparancy

How to Order

Call or email us to place your order. We accept ALL major credit and debit cards, bank transfer and also PayPal. 

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Expert advice

Unsure which spare parts you require? Or if a Separ filter will meet your requirements? 

Talk to our expert team. Call 01923 276 007



Delivery options

We have a wide range of shipping options available to suit your destination and budget.



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Contact Us

3 Kingley Park, Station Road, Kings Langley, Herts, WD4 8GW

Tel: +44 (0)1923 276007

Fax: +44 (0)1923 267463

Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

Here to Help

Product guides

Fuel Specs


Selecting a Filter