Separ SWK2000/40 and SWK2000/40/2 Simplex



If large fuel flow rates are required, the SWK2000/40 range can handle up to 2400 litres per hour. Whereas the "double" version, the SWK2000/40/2 can handle twice that flow, 4800 litres per hour. Large yachts, or fuel storage systems require large fuel flow rates. The SWK2000/40 range is capable of handling up to 2400 litres per hour, (which equates to 40 litres per minute), or up to 4800 litres per hour (80 litres per minute) in the 'double' series version. The standard simplex unit has an M33 thread input and output, whereas the 'double' version can accept a 42mm pipe directly.


  • High flow, high performance filter
  • Extremely low restriction
  • Easy change element
  • 'Double' version available for 80 litres per minute
  • 5 stage filtration [click here for details]
  • Option for petrol applications and viton seals
  • 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 

SWK2000/40M Metal bowl
SWK2000/40MK Metal bowl and alarm contacts
SWK2000/40/2/M Double Unit (2 x metal bowl)
SWK2000/40/2/MK Double Unit (2 x metal bowl with alarm contacts)



10 micron paper element
30 micron paper element
60 micron stainless steel element (long life)
30980 Seal and gasket kit



30091 24v water in fuel alarm
30090 12v water in fuel alarm
30400 Audible alarm for above
30457 Replacement metal bowl
30457K Replacement metal bowl with alarm contacts
30446 Bowl retaining ring
30456 Locking drain tap
30435 Filter lid
30408 Bleed screw
30558 Bleed valve gasket
30299 Spring cassette
 More options available, please contact us.

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

  SWK2000/40 Simplex   SWK2000/40/2MK 'Double'  
Item Metric Imperial



Max Flow 2400 Lit/hr 528 Gal/hr 4800 Lit/hr 1056 Gal/hr
Filter restriction at Max Flow 30mic element 32 mBar 0.95 IN. HG 32 mBar 0.95 IN. HG
Port Size M33 x 2  15/16 -12 in M33 x 2  2" pipe
Height 480 mm 19 in 480 mm 19 in
Element removal 60 mm 3 in 60 mm 3 in
Total height needed 559 mm 22 in 559 mm 22 in
Depth 211 mm 8.3 in 211 mm 8.3 in
Width 290 mm 11.5 in 863 mm 34 in
Weight 11 kg 24 Lbs. 31 kg 69 Lbs.

Please click here for the SWK2000/40 PDF datasheet


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


Flow pressure chart



flow pressure 40

flow pressure 402


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



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 <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)



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