Data Centre Cooling Solutions
Direct Liquid Cooling PG25 is a ready-to-use propylene glycol-based heat transfer fluid engineered specifically for Direct-to-Chip cooling systems.
Designed to deliver reliable heat dissipation alongside extended corrosion protection, material compatibility and long-term fluid stability, PG25 provides a purpose-developed cooling fluid for high-performance data centre and AI infrastructure.
Available from DC Cooling Solutions, official partners and distributors of Castrol ON advanced thermal fluids.
Direct-to-Chip systems circulate coolant through cold plates mounted directly onto high-performance CPUs, GPUs and other heat-generating components.
As compute densities increase, the performance and condition of the coolant become increasingly important to maintaining effective heat removal and protecting the cooling circuit.
PG25 has been specifically developed for this application.
Its formulation combines effective heat transfer with corrosion protection, material compatibility and biostability to support reliable long-term operation within Direct-to-Chip cooling systems.
Proven heat transfer performance
PG25 is designed to provide reliable heat dissipation within Direct-to-Chip cooling circuits, helping maintain appropriate operating temperatures under demanding compute loads.
Extended corrosion protection
Advanced inhibitors help protect metal components within the cooling circuit against corrosion throughout the fluid's service life.
Material compatibility
PG25 has been developed for compatibility with wetted materials found within liquid cooling systems, including the metals, plastics, seals and other components that come into contact with the coolant.
Biostable formulation
The formulation prevents bacterial growth during service, helping maintain fluid integrity and cooling system cleanliness.
Ready to use
PG25 is supplied as a pre-mixed solution and requires no on-site dilution with water, simplifying filling and reducing the risk associated with incorrect concentration or water quality.
Long-term durability
Designed for continuous closed-loop operation, PG25 provides the stability required for demanding data centre cooling environments.
Direct Liquid Cooling PG25 has achieved OCP Inspired™ recognition from the Open Compute Project Foundation.
OCP Inspired™ recognition provides additional independent industry validation for organisations evaluating liquid cooling technologies for open, scalable and high-performance computing infrastructure.
PG25 has been validated to meet NVIDIA requirements for AI factory and data centre infrastructure.
The NVIDIA validation followed a technical review covering:
The validation provides additional confidence for data centre operators, equipment manufacturers and cooling-system providers selecting fluids for high-performance AI infrastructure.
Direct Liquid Cooling PG25 is recommended for applications including:
For a wider overview of Direct-to-Chip cooling architecture, cooling requirements and DCCS support:
Selecting the correct coolant is only part of maintaining reliable Direct-to-Chip cooling.
Coolant contamination, incorrect filling, changes in fluid condition and suspended material can affect cooling performance and potentially compromise critical components within the cooling circuit.
DC Cooling Solutions provide specialist support throughout the coolant lifecycle, including:
This allows coolant performance and condition to be measured and managed throughout the operating life of the system.
DC Cooling Solutions are official partners and distributors of Castrol ON advanced thermal fluids.
DCCS combine Castrol ON PG25 with specialist expertise in cooling fluids, fluid chemistry and hydronic cooling systems — supporting operators from initial product selection and commissioning through to monitoring and ongoing fluid management.
For organisations introducing Direct-to-Chip cooling, this provides access to both the purpose-developed coolant and the technical expertise required to manage it correctly.
Specifying coolant for a new Direct-to-Chip deployment or reviewing the fluid within an existing system?
UK: 0800 888 6848
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