Industrial gas supplier Air Products sought a UK-based pump manufacturer capable of seamlessly replacing an obsolete Girdlestone single stage pump. The cryogenic pump is used for transporting liquid argon at temperatures below –186°C. The application demanded a pump that was both dimensionally and hydraulically interchangeable with the legacy design, without compromising on performance or safety in extreme cryogenic conditions.
For this project, the pump was manufactured from carbon steel, a deliberate choice to preserve ductility in extreme cold conditions, as opposed to stainless steel, which becomes brittle at cryogenic temperatures. This careful material selection ensures structural integrity and enhances the durability of the unit.
The pump is powered by a high-performance WEG motor, ensuring efficient operation under heavy-duty conditions. Integrated PT100 pressure transmitters deliver precise pressure monitoring, while auxiliary heaters maintain optimal operating conditions for flawless performance in cryogenic environments. Additionally, a specially formulated paint system has been applied to the pump’s exterior to provide superior adhesion and resistance to the severe thermal stresses encountered in such applications.
Before delivery, the new cryogenic pump underwent comprehensive cold function testing using liquid nitrogen in a controlled environment at Amarinth’s dedicated test facility.
Oliver Brigginshaw, managing director of Amarinth, said: “In a world where energy transitions and technological innovation are accelerating at an unprecedented pace, this latest order from Air Products underlines our role as pioneers in engineering robust, future-ready solutions. Our commitment to sustainability, innovation, and operational excellence enables us to deliver sophisticated cryogenic pump systems that not only meet today’s demanding standards but also position our customers to thrive in tomorrow’s dynamic industrial landscape.”
