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Azcue AN Long Coupled Centrifugal Pump

Circulating Pump & Sea Water Cooling Pump

Azcue AN Long Coupled Centrifugal PumpAzcue AN Long Coupled Centrifugal PumpAzcue AN Long Coupled Centrifugal Pump
Flow Rate Up to 700M³H
Max Head (pressure) Up to 100M
Outlet Sizes DN32-150
Max Temperature 190°C

Flow Rate Up to 700M³H
Max Head (pressure) Up to 100M
Outlet Sizes DN32-150
Max Temperature 190°C

The Azcue AN Horizontal Centrifugal Pump is the long coupled version of the MN; a large, heavy duty pump with good flow and pressure capabilities. Being long coupled, this model of single stage centrifugal pump is easier to maintain as you can get to the pump head without removing the motor first, and is also more durable for continuous use as it has additional bearings in the pump head to share the strain of operation.

Based on DIN 24255, the Azcue AN is manufactured to be the same dimensionally as other pumps enabling the simple replacement of existing horizontal centrifugal pumps from other manufacturers in installations concerning relatively clean fluids such as water and low viscosity fuels. As it is available with a double mechanical seal cooling system, fluids are able to be handled up to 190°C which also sees the AN suitable as a thermal oil pump.

This model of centrifugal pump benefits from a back pull out design, which allows the motor to be removed without disconnecting the pump from the pipework, and the maintenance process to be less time consuming and complex. Thanks to the casing wear rings, there is small clearance between the impeller and pump casing, preventing wear to these parts. Wearing rings are designed to be replaced periodically, preventing the more costly replacement of the impeller or casing. 

These Azcue pumps have separate shafts in the pump head and motor meaning that if there is ever an issue with one shaft, there is no need to replace it all; a benefit over other pumps on the market that have one continuous shaft from head to motor. If required, the AN centrifugal water pump is available with an external vacuum or electric priming pump. For longer suction distances, a vacuum priming pump would be the better solution thanks to its ability to dry run for short periods of time. 

  • Long coupled, single stage centrifugal pump
  • DIN 24255 dimensions for easy retrofitting
  • Pump manufactured in Spain
  • Marine type approved by all classification societies
  • Horizontal design
  • Available in cast iron, 316 stainless steel and bronze for seawater
  • Back pull out design for simple maintenance
  • Separate shafts in the pump and motor
  • Low NPSH
  • Mechanical seals or gland packing
  • Casing wear rings to prolong casing and impeller life
  • 230v, three phase 50Hz/60Hz motors available. IP55 as standard.
  • Available with a vacuum or electric priming pump on request
  • Available with double mechanical seal cooling system for fluids up to 190°C
  • Assembly without alignment
  • Supplied flanged as standard
  • Suitable for thermal oils including Marlotherm, Duratherm, Paratherm, Multitherm, Mobiltherm and Dowtherm
  • ATEX versions available
  • IMPA Code: 59 17 61
Marine Applications:Industrial Applications:
  • Sea water cooling pump
  • General sea water service
  • Grey water with low solid content
  • Aquaculture recirculation systems
  • Ballast water pump
  • Fire fighting 
  • Low viscosity fuel and lubrication transfer
  • Boiler feed water pumping
  • Marine fume scrubber systems
  • Closed loop HVAC circulating and cooling pumps
  • General water transfer, supply and service
  • Waste water with low solid content
  • Water pressure booster pump
  • Swimming pool circulation systems
  • Agriculture and lawn irrigation
  • Low viscosity fuel and lubrication transfer
  • Boiler feed water pumping
  • Thermal oil pump

Key Benefits:



The Azcue AN Long Coupled Centrifugal Pump is available with the following material options:

G-Cusn5ZnPb (Rg5)
G-CuSN10Zn (Rg10)
X5CrNiMO 18 10
Subsea Oil & Gas for Winch

Subsea Oil & Gas for Winch

Here at Castle Pumps we understand that timing is important within the marine and offshore market. Quite often we receive enquiries that need to be dealt with quickly in order for the purchase and delivery to follow suit and minimise lead time. This subsea oil and gas company needed five sea water cooling pumps on a quick lead time. For this customer, we provided five long coupled centrifugal pumps in less than five weeks.

World’s Largest Container Ship 2012

World’s Largest Container Ship 2012

Castle Pumps have been specifying and supplying pumps for the marine market for several years, and therefore have expertise and knowledge when it comes to marine enquiries. The world's largest container ship in 2012 contacted Castle with an urgent enquiry, requiring two boiler feed pumps. Castle Pumps were able to select a model that matched their requirements and dispatch them in just 9 working days!



Castle Pumps receive a wide range of enquiries for a number of industry applications. Farming fish on land is an unusual but increasing market which Castle Pumps have adapted to in order to specify and supply pumps for requirements posed for within this market. A centrifugal pump was selected to match their requirements, which was fitted with accessories and a bespoke control panel to ensure all of their specifications were met.



Castle Pumps help customers to solve problems when quoting and specifying equipment. In this case study, the client was experiencing costly downtime due to a worker in the distillery having to keep manually priming the pump when it lost its prime. In order to overcome this issue, Castle Pumps provided two self-priming pumps; one as the main pump and one for standby to completely limit the risk of downtime.

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