Welcome to Separ UK

 swk200010transWe are the largest fuel polishing and fuel filtration supplier in Europe, supplying fuel filtration and preservation equipment to the generator, marine, building services, truck, bus, and heavy equipment markets since the 1980s.


Need to order spares?

01830 small cropped 2

Please call us on 01923 276 007 or email This email address is being protected from spambots. You need JavaScript enabled to view it.

Contact Us Tab          

Separ SWK2000/18 Simplex


swk200010transThe Separ 2000 is a water separator and diesel fuel filter equipped to accommodate today's engines.

The SWK2000/18 range is capable of handling flow rates up to 1080 litres per hour (18 litres per minute).


Product Overview

  • Up to 1080 litres per hour
  • High performance
  • Low restriction
  • Long-life filter element
  • Improved operating economics
  • Easy installation
  • Simple operation
  • 5 stage filtration (click here for details)
  • Option for petrol applications
  • Biodiesel compatible
  • Viton seal option (for bio-diesel)
  • M26 port sizes and adapters available  
  • Suction side centrifugal filter

How does it work?

Complete cleansing of the fuel is possible thanks to the Separ SWK 2000 series unique five-stage purification and separation process.

SWK2000 flow diagram

  1. fuel flows through the stationary aluminium centrifuge, which imparts a rotary, motion to the fuel flow
  2. the fuel exits the centrifuge where larger particulate and water droplets are separated into the bottom of the bowl by precipitation
  3. fuel flows through the second centrifuge, with the lower vane creating a partial vacuum, drawing smaller droplets and particulate down the vane into the bowl
  4. droplets of water and dirt coalesce on the upper surface during the forth stage, and when heavy enough fall back into the bowl
  5. fuel passes vertically through a filter element that removes any remaining water and particulate greater than an optional 10, 30 or 60 microns

See a larger diagram


The results

  • separ swk2000 elementClean fuel then flows to the engine fuel system
  • Separated water is contained in the bowl
  • Contaminations including fuel bug is captured in the element within the Separ Filter

Here is an example of an element from a SWK2000 which has encountered some dirty fuel, which includes a bacterial infection caused by water contamination. The element on the left is a clean element, the right is one which has collected contamination from the fuel.



Product Range

SWK2000/18 Range

Clear Bowl
Clear Bowl with alarm contacts
Clear bowl with heat shield and alarm contacts (ISO10088)
Metal bowl (ISO10088)
Metal bowl with alarm contacts (ISO10088)
Steel body/bowl
10 micron paper element
30 micron paper element
60 micron stainless steel element (long life)
30979 Seal and gasket kit



30091 24v water in fuel alarm
30090  12v water in fuel alarm
30400  Audible alarm for above
30986 Replacement clear bowl
30986K Replacement plastic bowl with alarm contacts
30428 Filter body/ housing
30996 RINA bowl, contact, heatshield, clamp, tap
30983 Replacement metal bowl
30983K Replacement metal bowl with alarm contacts
30575 Bowl retaining ring
30343 Locking drain tap
30572 Filter lid
30560 Centrifuge placement screw
30298 Spring cassette

Servicing and Technical Specifications


For instructions on installing the SWK2000 units, please click here.



For instruction on servicing and maintaining the SWK2000 units, please click here.


Technical Specification


Max Flow
1080 lit/hr
237 gal/hr
Filter restriction at Max Flow 30mic element
15 mbar
0.44 in/hg
Port Size
11/16-12 in
405 mm
Element removal
60 mm
3 in
Total height needed
465 mm
18 in
166 mm
6.5 in
210 mm
8 in
5 kg
11 lbs.

For the full SWK2000/18 specification - please click (PDF datasheet)


Flow pressure chart

flow pressure 18

Torque Settings

The following table shows the manufacturer's recommended tightening torques for the Separ SWK 2000 range

Filter Bowl Lid Port plug WIF sensor Bleed screw
SWK2000/5 6 Nm 6 Nm 10 Nm n/a 6 Nm
SWK2000/5/50 6 Nm 6 Nm 10 Nm n/a 6 Nm
SWK2000/10 8 Nm 8 Nm 10 Nm 10 Nm 6 Nm
SWK2000/18 12 Nm 12 Nm 15 Nm 10 Nm 6 Nm
SWK2000/40 13 Nm 15 Nm 15 Nm 10 Nm 6 Nm
SWK2000/130 ca 20 Nm ca 20 Nm n/a 10 Nm n/a

Over tightening bolts and fittings can cause damage, if in doubt please use a torque wrench or similar calibrated tool



The Separ 2000 series has the following approvals:

  • Lloyds Type Approval Certificate - No. 94/20036
  • Germanischer Lloyd Type Test Certificate - No. 04/84-93
  • Bureau Veritas Type Approval Certificate - No. 1521 5842 A10 D
  • Rina DIP/13/94
  • Technical Department for Army Ship and Marine Weapons - No. WTD71-213-003/94
  • Application has also been made to the American Bureau of Shipping & U.S. Coast Guard

Technical Documents

Fittings guide

Torque settings

Flow rate conversion chart



SWK2000/5 <5lit/min (300 lit/hr) <1.1gal/min (66 gal/hr)
SWK2000/5/50 <5lit/min (300 lit/hr)  <1.1gal/min (66 gal/hr)
SWK2000/10 <10lit/min (600 lit/hr) <2.2gal/min (132 gal/hr)
SWK2000/18 <18lit/min (1080 lit/hr) <4.0gal/min (240 gal/hr)
SWK2000/40 and 40/2 and 40/2 <40lit/min (2400 lit/hr) <9.0gal/min (528 gal/hr)
SWK2000/130 and 130/2 <130lit/min (7800 lit/hr) <29.0gal/min (1716 gal/hr)



How to Order

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

Contact Us TabPhone copy


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.



Wooden-Crate-psd42799 copy

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