Amarinth delivers interchangeable cryogenic pump replacements for Air Products
FOR IMMEDIATE RELEASE – 1st July 2026
Amarinth, a world-leading, net-zero designer and manufacturer of low lifecycle cost centrifugal pumps and associated equipment designed to minimise long-term operating costs with high-performance solutions across global markets, including onshore and offshore oil and gas, renewable and nuclear energy, defence, desalination, and the process and industrial markets, has successfully engineered and delivered an innovative cryogenic pump solution for Air Products.
The project centred on replacing critical legacy equipment that had reached the end of its operational life. Over 30 years ago, Girdlestone Pumps supplied Air Products with cryogenic 950 series pumps designed for low Net Positive Suction Head (NPSH) operations. While these assets provided decades of reliable service, they eventually required full replacement. However, because Girdlestone and its original product lines are now obsolete, sourcing direct replacements presented a significant procurement challenge.
Air Products turned to Amarinth, which has a proven industry-wide reputation for providing dimensionally and hydraulically interchangeable solutions for obsolete Girdlestone pumps. Furthermore, Amarinth had successfully supplied Girdlestone 950 replacements to Air Products on a previous project. The plug-and-play capability of Amarinth’s pumps eliminates the need for costly, time-consuming modifications to existing facility pipework and fittings. Combined with its extensive technical expertise in low NPSH and specialised cryogenic applications, Amarinth was uniquely positioned to deliver an advanced, modern replacement.
Beyond providing a seamless physical interchange, Amarinth addressed a material compliance requirement for the fluid barrier. The original pump supplied by Girdlestone utilised a carbon loaded PTFE bushing to segregate the liquid nitrogen from the gas contained in the lantern / motor assembly. Air Products advised that the replacement pump should be FDA (Food and Drug Administration) compliant. The metallurgy was fine, however to meet FDA compliance carbon loaded PTFE was not allowed in contact with the liquid nitrogen. Amarinth therefore sourced a new material that would perform the sealing duties and was suitable for both FDA compliance and the cryogenic application.
Amarinth also redesigned the mounting feet for the motor and pump assembly, replacing the old rubber mounted feet in the Girdlestone pump. The upgraded mounting feet use an advanced new material to safely and reliably absorb the dimensional changes caused by the cryogenic temperatures of the pumped fluid, maintaining precise alignment between the motor and pump.
The new pumps are manufactured from high-grade stainless steel to cope with cryogenic temperatures, maintaining structural integrity and long-term durability against thermal stresses. To meet strict quality control standards, comprehensive Non-Destructive Testing (NDT) was carried out across the pump components. Furthermore, to validate the integrity of the design before deployment, the pumps underwent rigorous cold start testing using liquid nitrogen to replicate real-world process conditions.
Oliver Brigginshaw, Managing Director of Amarinth, commented: “We are delighted to have delivered this technically sophisticated replacement project for Air Products. It perfectly highlights our unique ability to combine our deep knowledge of legacy Girdlestone assets with modern engineering innovation. By introducing cutting-edge materials to solve age-old issues like thermal shrinkage and vibration in cryogenic pumps, we provide our customers with robust, future-ready pumping solutions that minimise lifecycle costs and eliminate the need for disruptive infrastructure changes.”
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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, Halliburton, and Babcock.
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Comment:
Alex Brigginshaw
Commercial Director
Amarinth Limited
Bentwaters Park, Rendlesham
Woodbridge IP12 2TW
United Kingdom
Tel: +44 (0)1394 462131
Mobile: +44 (0)7703 681821
Alex.Brigginshaw@Amarinth.com
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
Phil.Harland@B6solutions.com
