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Screw Pump BT-IL

What is a Screw Pump?

A screw pump BT-IL is a positive displacement pump handling lubricating fluids under fluctuating flow rates, pressure and viscosity without losing efficiency.

Pump design and construction enable silent fluid handling without turbulence. Therefore, the pumps operate at high rotational speeds with high reliability. The design of the screw pump also means that it can be used where suction capabilities are difficult, such as pumping over long distances, or where the pump is located above the liquid.

The self-priming screw pump BT-IL from Azcue Pump in Spain is used where larger quantities of fuel oils or lubricants are transferred. The screw pump is horizontal in design with inline suction and discharge, delivered flanged as standard. 


Screw pump BT-IL from Azcue pumps
Drawing of a screw pump  BT-IL

Function of a Screw Pump

Azcue’s screw pump consists of three spindles surrounded by a pump casing.

The medium, f.inst. oil is transported axially through the pump via the chambers that arise between the casing and the spindles.


  • Flow Rate up to 35 m³H
  • Max Head (pressure) up tol 16 bar
  • Outlet Sizes DN 50-100
  • Max Temperature 160° C


All pumps are available in cast-iron

Advantages and Functions of the Screw Pumpe BT-IL

  • Self-priming screw pump
  • Additional bearings in pump head to share the strain of operation
  • Horizontal orientation
  • Mechanical seal as standard
  • Available with pressure relief valve
  • Low NPSH (Net Positive Suction Head) – see the performance in the brochure
  • 230v, three phases of 50Hz/60Hz motors available. IP55 as standard
  • ATEX version available


Fuel oil pumps – for loading and unloading ships
Fuel transfer – sea gas oil
Lubricating oil

Fuel transfer – handling of diesel and heating oil

Separation of Fuel Oil


Approved Screw Pump

Each pump is designed to fit your process, resulting in greater efficiency and lower lifetime costs in terms of wear and energy consumption. All pumps are tested individually before leaving the factory. The screw spindle pump is type registered by Lloyds / ABS.



Like the other pumps in the Azcue program the screw spindle pump BT-IL  benefits from interchangeable part for reduced on board stockholding. The task of replacing a pump prematurely that just needs maintenance won’t be necessary.

At West-Marine, we have many years of experience in servicing pumps from Azcue Pumps in Spain and guarantee supply of spare parts for many years to come from final production of a model. Thus, the user doesn’t need to replace a pump – only a spare part.

Take a closer look at the different pumps from Azcue here.

Any Questions about
our Solutions and Equipment?

We’ll find the optimal solution for you.
Continuous update means that we are up-to-date when it comes to pumps, spare parts and service.

Hans Jørgen Mouridsen

Hans Jørgen Mouridsen

System Coordinator
+45 76 11 97 61
+45 20 11 26 18

West-Marine A/S is a maritime company, which provides products and solutions to industrial, marine & offshore.

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  • Friday

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  • Sat-sun

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