Fuel Delivery & Polishing Assemblies.

Fuel Delivery & Polishing Assemblies.

24 September 2018 Post by Alan Green Pumps 0 Comment(s)

Fuel Delivery & Polishing Assemblies.

This skid unit includes a Viking 495/4195 motor mounted pump, a filter/separator, strainer and a return to tank relief valve. We have fitted it on to a stainless steel base - which does not need to be painted. The pipework has been painted to suit the clients' specification. The complete skid is fabricated and pressure tested by our engineers.

 
Diesel is organic, and modern diesel with biofuel added plus a little water is susceptible to organisms, fungi and bacteria, "Diesel Bugs" that live on the water-oil interface and eat the fuel. This problem is commonly called Diesel Fuel Algae - however, it is not technically algae and I will refer to the problem as 'bugs' from here on in.
 
As ambient temperatures fluctuate, condensation can form inside the tank, this water can provide the interface that fuel bugs need to thrive. We make a fuel polishing and delivery system which solves this problem.  
 
This skid unit includes a Viking 495/4195 motor mounted pump, a filter/separator, strainer and a return to tank relief valve. We have fitted it on to a stainless steel base - which does not need to be painted. The pipework has been painted to suit the clients' specification. The complete skid is fabricated and pressure tested by our engineers.
 
The Fuel Polishing Assemblies below were made for a recent client who will use them in a large data centre.
 
Viking Pump Assembly for Fuel Polishing Diesel Fuel Bulk Storage and Delivery
 

The Pump - Viking 495/4195 - Technical Specifications

 Fuel Polishing Unit 

 
The fuel is drawn through the filter separator by the pump, on the pump discharge side, a return to the tank safety valve protects the pump. The unit also contains a filter separator bypass so that the pump can be used for delivery without polishing if it is not needed, meaning you can use one pumping unit for delivery and polishing.
 

Filter/Separator 

The one used in the fuel unit above is a Separ Fuel Separator. We can make any unit to spec, however, using the filter that is most suitable to the application. Here's how it works:
 
 
Separ Filter for Fuel Polishing Unit Thomson Process Equipment and Engineering Ireland
 

5 Stage Filtration for Diesel Fuel Polishing 

  1. After entering the inlet(s), the first vane system spins the diesel fuel in a circular motion.
  2. In the bowl, fuel continues to spin - separating water and heavier particulates. 
  3. A second vane system then forces the fuel to spin in a different direction, separating smaller water droplets and finer particulates.
  4. A wider passage, just below the element, slows down fuel to allow more contaminants to settle in the bowl. 
  5. Finally, the element filters finer particulates out of the fuel before exiting through the outlet. 
 
 

What industries use a Fuel Polishing Assembly? 

Fuel Polishing Units like these are used for large industrial plants where energy is required to be 'always on'. Most of the time the diesel will be in storage and out of use until the vital moment it is needed. So it needs to be always in perfect condition. The top 5 projects you might need a series of Fuel Polishing Units for are:
 
  • Data Centres/Centers - for the backup generator or for the fuel storage units.
  • Big Generators.
  • Airport and Docklands refuelling stations - for large quantities of fuel storage that needs to be cleaned regularly.
  • Large-scale engineering and building projects like Hospitals, Banks, Schools and Prisons - anywhere where equipment cannot ever go offline.
  • Oil supply companies who store and supply oil in tankers and trucks all throughout the country.
  • What happens if the fuel is NOT polished?
  • If fuel is stored for too long without being maintained the water-fuel interface can build up in the tank providing the ideal conditions for Diesel Bugs.
 
Contamination from the waste products produced by the Diesel Bugs builds up as a sludge on the surfaces of the of the tank. This sludge can remain for a long time without moving but if it is disturbed can overwhelm the filter system and block all the filters in a very short period.
 
It can even destroy a whole tank of fuel leading the disposal problem as well as the loss of fuel, damage to filters and even the tanks and pipework. The bio-films formed on steel surfaces are corrosive. Look for the tell-tale pits and crevices on your tank and if there’s a smell of rotten-eggs then you know you have a serious diesel bug problem.
 
Will your project have Diesel in storage for a long time?
If the answer is yes, then contact us today.
 Request a quote for Fuel Polishing Assemblies Thomson Process Equipment and Engineering Ltd 

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