Amarinth U Series CRU pumps are specifically designed and manufactured for condensate applications. The pumps are typically found in general industrial applications such a building services or hospitals. U Series CRU pumps are designed for low NPSH to reduce the overall CRU footprint and all have independently verified, full ATEX compliance.

The U Series CRU pumps are designed to be fully interchangeable with a Girdlestone URF or USM pump. Amarinth’s U Series CRU pump has identical termination points (i.e. suction & discharge flange positions) to the Girdlestone equivalent pump meaning there are no issues changing pipework when you replace your existing pump. The U Series CRU pump will simply slot straight in to the space left by the original.

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Hydraulic Performance

Amarinth U Series CRU pumps can be fitted with fixed or variable speed drivers from any manufacturer. The overall U Series CRU hydraulic coverage chart is shown on the left. More detailed hydraulic coverage charts list individual pump designations at 2 pole & 4 pole speeds. Specific duty curves will be provided with all quotations.

Use the slider at the bottom of the images to select the hydraulic coverage chart you're interested in & then launch the relevant pdf to review the coverage charts in more detail.


A number of images in various pump configurations are provided to help you visualise our U Series CRU product including:

  • Isometric view
  • Exploded view
  • General arrangement
  • Sectional arrangement

Select an image below using the slider at the bottom and then launch the relevant PDF.

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General description

A range of single stage centrifugal end suction pumps with tangential discharge manufactured in a variety of alloys. All pumps and individual components are fully interchangeable with the equivalent Girdlestone URF / USM series units.


Back pullout design with machined abutments

Design methodology

Advanced computer techniques including 3D modelling, FEA & CFD

Design standards

ATEX EC-Directive 94/9/EC (close coupled versions only)

Design pressure rating

10 bar g @ 20°C

Suction pressure rating

6 bar g (long coupled)
3.5 bar g (close coupled)

Temperature rating

-10°C to 200°C (long coupled)
-5°C to 120°C (close coupled)

Design temperature

150°C (standard construction)

Flow rate

Up to 500m³/h

Differential head

Up to 165m


Up to 3600 rpm


Long coupled pump
Close coupled pump
Bareshaft pump

Frame sizes

050x040x159 to 150x125x274

Design life

15 years (2 years uninterrupted operation)


Amarinth U Series CRU pumps are available in a variety of materials as standard which include the following pump / impeller combinations.

Materials Casing Impeller
Cast Iron / Gunmetal BS EN 1561 Gr EN-GJL-250 BS EN 1982 CC492K GS