Jiangsu Haifa Machinery Manufacturing Co., Ltd.

NVIDIA's 800VD High-Voltage DC Power Distribution Architecture Drives AI Computing Liquid Cooling CDU Iteration, with Leak-Free Electronic Shielded Pumps Becoming Core Supporting Equipment. Leveraging its R&D expertise in API610 and API685 chemical pumps, Jiangsuifa has completed the customized development of 800VDC DC shielded pumps in terms of hydraulics, insulation, and redundant systems, meeting the continuous and stable cooling demands of megawatt-level AI computing centers. Keywords: 800VDC liquid cooling pump, AI data center CDU shielded pump, high-voltage DC leak-free pump, NVIDIA computing liquid cooling, Jiangsu Haifa shielded.

The power consumption of individual AI server cabinets continues to rise. Air cooling and traditional AC water pump solutions are constrained by power losses, wiring space, and operational efficiency, making it difficult to support high-density computing cluster construction. NVIDIA has introduced the 800VDC high-voltage DC architecture which significantly simplifies the power conversion chain, increases the transmission capacity of equivalent cables by 85%, and reduces copper usage by 45%, making it the mainstream solution for next-generation AI Factory infrastructure. Alongside the transformation of the power distribution system, the internal circulation pumps in liquid cooling CDUs undergoing a comprehensive technological upgrade, with high-voltage DC direct-drive electronic shielded pumps gradually replacing traditional AC water pumps. At the NVIDIA GTC 2026 exhibition, Delta unveiled a 2.4MW liquid-to-liquid CDU unit compatible with the 800VD architecture. The equipment is equipped with N+1 redundant high-voltage DC shielded pumps achieving a cooling power of to 2400kW and a heat exchange approach temperature difference as low as 4°C. The OCPchutes project has defined a 2MW CDU baseline operating condition, specifying that the secondary side circulation pump must meet requirements for wide-range speed regulation, zero leakage, and automatic fault switching. The shaftless electronic shielded pump has become industry consensus for selection. Electronic shielded pumps eliminate the coupling and dynamic shaft seal structure, with the motor and impeller fully sealed and submerged within the coolant, completely eliminating leakage risks. They can transport heat exchange media such as deionized water and ethylene glycol water solutions. AI computing centers require uninterrupted year-round operation. Once the pump set stops, chip temperatures will quickly exceed limits. Therefore, N+1 redundant configuration, dual power supply, online differential pressure monitoring, and one-key fault switching are essential design points—core advantages that AC variable frequency pumps cannot match.

Jiangsu Haifa has long specialized in API610 chemical process pumps and API magnetic drive and shielded pumps, transferring its extensive experience in high-temperature and high-pressure hydraulic design, rotor dynamics, material compatibility, and long-cycle durability testing to the data center liquid cooling field. Leveraging its hydraulic model reserves across the full OH/BB/VS pump series, it covers the flow and head requirements of large-scale cooling circulation systems. Years of expertise in pressure-bearing casing design, thermal cycling deformation verification, and seal-less structure development provide solid technical support for the development of 800VDC shielded pumps. on the usage scenarios of computing server rooms, the company has defined standardized prototype R&D targets: rated 800VDC DC input single pump flow rate of 80~300m³/h, head of 25~60m, power range of 11~45kW; adopting a 2+1 redundant layout, hydraulic efficiency ≥80%, vibration under rated conditions ≤2.8mm/s, overall machine noise below 65dB(A), zero external leakage of the medium, and equipment MTBF no less than 80000 hours. It is also equipped with multi-dimensional monitoring modules for current, temperature, differential pressure, and insulation status, adapting to the platform's predictive maintenance system. The R&D phase sequentially completed withstand voltage insulation, EMC electromagnetic compatibility, coolant compatibility, thermal cycling, and 168-hour full-load endurance tests, ensuring stability under the harsh operating conditions of the server room.

The upgrade to the 800VDC system not merely about raising the supply voltage; it involves the integrated and coordinated reconstruction of power supplies, CDUs, cold plates, and operations and maintenance. In the future, electrothermal co-design, digital twins, and condition monitoring will be deeply integrated into liquid cooling. The industry's competitive focus will center on high-voltage DC drive technology, low-loss shielded sleeves, sliding bearing lifespan, and clean fluid management. Jiangsu Haifa continues to advance the debugging of 800VDC electronic shielded pump prototypes the modular integration of N+1 pump sets, and the development of online monitoring systems. Leveraging its mature manufacturing expertise in high-end chemical pumps, aims to create zero-leakage circulation delivery equipment suitable for global AI computing clusters, supporting the domestic upgrade of China's liquid cooling infrastructure.

Image ALT tags:
alt: Schematic diagram of the NVIDIA 800VDC AI data center power distribution architecture and the complete liquid cooling CDU system flow
alt: Real shot of Jiangsu Haifa's VDC high-voltage DC electronic shielded pump prototype R&D and performance testing platform
alt: Jiangsu Haifa's API610 chemical pump hydraulic performance laboratory, providing technical verification support for liquid cooling pumps

Section:
Q1: Does NVIDIA mandate the use of electronic shielded pumps for 800VDC architecture CDUs?
A: NVIDIA has not issued a hard mandatory specification, but ecosystem partners like Delta have equipped their megawatt-level CDU products with high DC shielded pumps as standard. The OCP open project also lists shaftless redundant pumps as a recommended solution, making it a mainstream technological trend.

Q2: Can API610 chemical pumps directly used for CDU liquid cooling circulation in data centers?
A: No, they cannot be directly applied. the hydraulic structure, pressure-bearing, and sealing design experience from chemical pumps can be, liquid cooling pumps must specific requirements such as electrical insulation, EMC, low noise, compact layout, and compatibility with clean media. Targeted secondary development and verification are necessary.