Azcue RA Reversible Side Channel Pump

Circulating & Sea Water Cooling Pump

Key Specifications
Max Flow Rate 18M³H
Max Head 60M
Max Temperature 90°C
Max Viscosity 200 cP
Solids 0mm
Size DN25 to DN40
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The Azcue RA Side Channel Pump is a reversible design of liquid ring pump that can pump in either direction. This makes it ideal for emptying or filling tanks either side of the pump, and for pumping any remaining water left in the pipework after operation has been completed. Its ability to handle up to 50% gas content makes it popular for applications such as condensate extraction and boiler feed.

The RA model of liquid ring pump is supplied bareshaft as standard, with the option to have it clutch/pulley driven. These Azcue side channel pumps are easy to maintain pumps as they can be quickly dismantled through removal of the front cover plate giving access to internal components.

Available here is our guide to the design and workings of a side channel pump, as well as the applications they are ideally suited to.

Features of the Azcue RA Series Liquid Ring Pump:

  • Bareshaft side channel pump
  • Reversible operation – can pump in either direction
  • Pump manufactured in Spain
  • Marine type approved by all classification societies
  • Can handle up to 50% entrained air content
  • Available in cast iron, 316 stainless steel and bronze for seawater
  • Low NPSH
  • Compact horizontal design ideal for space saving installations
  • Mechanical seal or gland packing
  • Self priming design
  • Can be supplied with clutch or pulley on request

The RA Reversible Side Channel Pump is manufactured by Azcue Pumps. As the official UK Agent of Azcue Pumps, Castle Pumps are a leading Bombas Azcue supplier in the UK with unrivalled technical knowledge. Azcue Pumps are a European manufacturer with over 100 years’ experience in type approved pumps for marine and offshore applications. Today their pumps are installed in more than 10,000 vessel builds. Whilst originally developed for the marine market, Azcue Pumps’ reliability in applications that depend upon the safety and operation of a ship saw them become a desirable product in industrial applications involving water, fuels and lubricants.

One of the key benefits of the RA liquid ring pump like the other models in the Azcue range, is that is benefits from interchangeable parts for reduced on board stockholding. We guarantee supply of spares for 15 years from model discontinuation for long term pump servicing, saving the user from having to prematurely replace a pump that just needs maintenance.

Azcue RA side channel pump are cast, machined and assembled at their foundry in Spain. Each pump is manufactured to order and designed to fit your process, resulting in greater efficiency and lower overall lifetime cost in terms of wear and energy consumption. Before leaving the factory, pumps are individually tested to confirm performance meets the requirements set out in your enquiry.

Like centrifugal pumps, side channel pumps have narrow tolerances that make them suited to only clean, low viscosity fluid free from solids. However, their uses do vary. Firstly, side channel pumps can handle high temperature fluids that are pumped close to boiling point and can pump fluids that contain up to 50% gas content with little interruption to fluid flow. Their higher pressure capabilities also mean that it can transfer fluid over long distances or through narrow pipework easier than an equivalent centrifugal pump. This makes the Azcue RA liquid ring pump ideal for the below applications:

Marine Applications:Industrial Applications:
  • Desalination/reverse osmosis pump
  • Boiler feed
  • Condensate extraction
  • Fresh water & sea water cooling pump
  • General sea water service
  • Aquaculture recirculation systems
  • Low viscosity fuel and lubrication transfer
  • Condensate extraction
  • Boiler feed
  • Closed loop HVAC circulating & cooling tower pumps
  • General water transfer, supply and service
  • Water pressure boosting pump
  • Swimming pool recirculation systems
  • Low viscosity fuel and lubrication transfer

The Azcue RA Reversible Self Priming Liquid Ring Pumps are available with the following material options:

CAST IRON
GG25		BRONZE
G-Cusn5ZnPb (Rg5)		BRONZE
G-CusN7Znpb		BRONZE
G-CUA110Ni		STAINLESS STEEL AISI 316
X5CrNiMO 18 10		STAINLESS STEEL AISI 431
X22CrNi17
CASINGXXX
IMPELLERXX
SHAFTX
DIFFUSERXXX

FAQs

Side channel pumps, or liquid ring pumps as they are otherwise known, are somewhat of a hybrid between a positive displacement pump and a centrifugal pump. Upon start up, a side channel pump begins to operate like a positive displacement pump as it self primes, but soon begins to act like a centrifugal pump once the side channels become filled with fluid.

The liquid is drawn in and enters the impeller blades and the side channel which is open at just one point in the casing, rather than the entire circumference. As the star shaped impeller rotates, the pumped fluid moves back and forth several times between the blades of the impeller and the side channel. This creates a strong transfer of energy and results in an increase in pressure up to 10 times greater than that of centrifugal pump rotating at the same speed.

They are usually designed for low flow, high pressure applications involving any low viscosity, clean fluids and chemicals including those at high temperatures with entrained gas or vapour content up to 50%.

Due to their narrow tolerances, side channel pumps are unable to hande solids. All liquids pumped must be clean and free of particles.

Yes! As the fluid collects in the outer area of the side channel and impeller blades, a liquid ring forms to facilite the self-priming process like a positive displacement pump, making it ideal for difficult suction conditions.

Unfortunately not. The high internal velocity/force that is applied upon the fluidlike a centrifugal pump can damage or alter the consistency of a delicate fluid.

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