Amarinth designs and launches Ci-Nergy – intelligent variable speed condensate recovery units


Amarinth launch innovative variable speed technology CRUs which deliver a significant saving in system operating costs

Amarinth, a UK company specialising in the design, application and manufacture of pumps and pumping systems has announced a new range of variable speed technology condensate recovery units that deliver significant savings in the running costs of steam heating and process systems.

Marketed as Ci-Nergy, this new range of condensate recovery units (CRUs) uses variable speed technology to deal automatically with varying levels of condensate arriving in the tank. The speed control acts as a soft start system allowing the pump to be started more frequently than fixed speed pumps. The result is that the accumulated condensate and its associated latent heat are returned back into the system much more rapidly than by using traditional fixed speed pumps with float controls. The returning condensate can be up to 10 deg C hotter, which results in savings on re-heating costs of up to £10,000 per annum.

Significant reductions of up to 75% in electricity costs are achieved by running the pump as slow as 10 Hz. The savings are exponential (often referred to as the cubed law) and so by utilising variable speed technology, the Ci-Nergy operates anywhere between 10 and 50 Hz to automatically match the level of condensate arriving in the tank. This delivers typical electricity savings of a further £1,000+ per annum per unit.In most cases the overall payback on the new units is between 6 and 9 months, making them an extremely cost effective upgrade to existing units.

Amarinth worked with steam specialist Spriax Sarco on the specification of the new Ci-Nergy unit. The design brief was very demanding:
better performance and greater reliability than the competition but at a price that was competitive;
variable speed technology;
stainless steel tanks;
small foot print;
and a significantly rationalised range.

In just 18 months Amarinth designed and brought the Ci-Nergy range into production. The new design concept was one of plug and play. Using just two tank and pump sizes with eight motors to handle condensate of between 500 and 35,000 kg/hour, the old range of 59 products was rationalised to just eight units.

Despite the much higher specification, by reducing the number of components the price of the new unit is less than the old one. Using Amarinth’s e-commerce web-based ordering system, customers can also receive delivery of a new unit in 2 weeks and spare parts within 24 hours.

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Amarinth Pump Manufacturing

Amarinth is a carbon net zero organisation delivering world-leading expertise in the design, application and manufacture of centrifugal pumps and associated equipment for critical applications in many of the most arduous and hostile environments around the globe.

Founded in 2002, Amarinth has harnessed the skills, creativity and passion of people who have worked in the pump industry for decades, delivering bespoke API and ISO pumps primarily to the offshore and onshore oil & gas industries; nuclear and renewable energy generation; defence; desalination; process and industrial markets.

The company’s innovative approach, business agility and use of sophisticated computer applications enables it to deliver robust, reliable and sustainable pumping solutions on the shortest lead times in the industry.

Process pumps – API 610, API 685, ISO 5199 horizontal, vertical and in-line bespoke process pumps, including ones that are hydraulically and dimensionally interchangeable with the former Girdlestone and other obsolete pumps.

Skid packages and modules – Supplied with a variety of drives for applications including de-sanding, mixing, filtration and chemical injection and tailored for the oil & gas, water treatment and power generation industries.

Condensate recovery – Cutting-edge design providing low NPSH up to 98°C with variable speed drives to reduce cycle time and lower operating costs, available in stainless steel, galvanised or copper tanks for light or heavy industrial uses.

Seal support – Integrated pressurised and vented seal support systems designed and delivered to API 682 and ISO 5199 standards and specific site specifications and requirements, working closely with AES, Eagle Burgmann, John Crane and Protect System.

Spare parts – Critical spares for all Amarinth pumps and related components can be dispatched the same day, reducing potential downtime, and in addition components for the former Girdlestone and other obsolete pumps can be re-engineered often improving the performance of existing assets.

Services – A full range of pump related services, delivered from UK head office or on-site globally, onshore or off-shore, including full commissioning and start-up support; also strip, report and refurbishment of any pump regardless of manufacturer.

Amarinth operates globally from its base in Rendlesham Suffolk, United Kingdom and offices in the Middle East and Malaysia with a global customer base, including BP, Shell, ADNOC, NOV, ExxonMobil, Schlumberger, COSCO, EDF, GlaxoSmithKline, Saudi Aramco, Pfizer, Diageo, Kuwait Oil Company, AMEC, Fluor, LUKOIL, Halliburton, and Babcock.

For further information or photos contact

Alex Brigginshaw
Commercial Director
Amarinth Limited
Bentwaters Park, Rendlesham
Woodbridge IP12 2TW
United Kingdom
Tel: +44 (0)1394 462131
Mobile: +44 (0)7703 681821

Media Relations:
Phil Harland
B6 Solutions Limited
29 Swan Drive
The Wharf, Aldermaston
Reading RG7 4UZ
United Kingdom
Tel: +44 (0)118 971 3271
Mobile: +44 (0)7880 748380

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