In the era of large AI models, computing power demand is surging exponentially. For instance, a single NVIDIA H100 GPU consumes 700 watts, while the B200 has exceeded 1,000 watts. An 8-GPU server boasts a total power consumption of nearly 10 kW, and a fully loaded GPU cluster cabinet achieves a power density ranging from 40 to 80 kW. Traditional air cooling has hit its physical limits: air’s heat capacity is merely one-fourth that of water, and its thermal conductivity trails water by two orders of magnitude. Air cooling solutions cease to function once the chip heat flux density surpasses 100 W/cm².

Liquid cooling has become the only viable solution for high-density computing power. What lies at the core of a liquid cooling system? It is not the cold plate, nor the CDU, nor the piping — it is the pump. The pump serves as the "heart" of the liquid cooling system. Without precise, reliable and durable fluid delivery, even the most sophisticated cold plate designs and high-efficiency coolants cannot deliver their full performance. The performance of the pump directly determines heat dissipation efficiency, operational stability and total lifecycle cost.

▼ Five Core Technical Barriers of Liquid Cooling Pumps

In a liquid cooling system, the pump’s function is far more than merely "circulating liquid". It has to overcome five major technical challenges simultaneously:

▼ Cold-Plate GPU Servers: The Optimal Application Scenario for Precision Magnetic Gear Pumps

The Essence of Cold-Plate Liquid Cooling

Cold-plate liquid cooling is currently the mainstream solution for AI training servers. Liquid cooling cold plates are mounted directly against GPU chip surfaces; coolant flows through internal microchannels to carry away heat via forced convection.

Key parameter: Microchannels inside cold plates feature characteristic dimensions of only 0.2–0.5 mm. At this scale:

Insufficient flow velocity → Local boiling → Chip burnout

Pressure pulsation → Cold plate micro-vibration → TIM layer degradation

Uneven flow distribution → Temperature differentials across multiple GPUs → "Bucket effect" limiting overall cluster performance

Magnetic Gear Pumps vs. Centrifugal Pumps vs. Diaphragm Pumps

JONSN Precision Magnetic Gear Pump Solutions

With years of expertise in precision magnetic gear pump technology, JONSN delivers fully validated solutions for cold-plate liquid cooling scenarios, supported by three core strengths: extended service life, compact footprint, and 3-year maintenance-free operation.

▼ Three Core Advantages of JONSN Precision Magnetic Gear Pumps

 Extended Service Life – 50,000-hour design life matching the full lifecycle of GPU servers
JONSN precision magnetic gear pumps adopt high-hardness gear materials and ultra-precision machining (mesh clearance ≤ 5 μm, Ra ≤ 0.2 μm). Magnetic coupling drive eliminates mechanical friction, delivering continuous runtime exceeding 50,000 hours. With data centers operating 8,760 hours per year, the pumps support GPU servers for over 5 years of full lifecycle operation, eliminating mid-term pump replacement needs.

Ultra-Compact Footprint – Space-saving magnetic coupling design for valuable data center floor space
Magnetic coupling replaces traditional mechanical seal shaft assemblies, removing auxiliary components such as seal glands and flushing piping. The unit volume is only one-third that of equivalent centrifugal pumps. For high-density 1U/2U server chassis, JONSN pumps can be flexibly integrated near CDUs or cold plate manifolds, simplifying piping layouts and reducing flow resistance losses.

3-Year Maintenance-Free Operation – Zero leakage magnetic drive cuts 3-year maintenance costs entirely
JONSN precision magnetic gear pumps contain just two rotating components (driving and driven gears). Magnetic coupling enables contactless torque transmission, eliminating mechanical seal wear and fluid leakage risks. Three years of maintenance-free operation is a structural guarantee: no seal replacements, no lubricant refills, and no routine inspections required, drastically cutting data center labor overhead and total lifecycle costs.

JONSN has been approved as a qualified supplier by NAURA Technology Group, established in-depth cooperation with HZC, and signed supply agreements with Advanced Micro-Fabrication Equipment (AMEC). Recognition from leading semiconductor manufacturers validates JONSN’s leading supporting capacity and benchmark standing in high-end precision fluid equipment.

▼ Immersion Cooling Data Centers: Pumping Challenges for High-Volume Circulation

Two Immersion Cooling Technical Routes

Immersion cooling submerges entire servers directly in dielectric coolant, split into two mainstream routes:

The Role of Pumps in Immersion Cooling Systems

Single-Phase Immersion Cooling – Pumps form the core circulation power
Each cabinet requires a circulation flow rate of 50–200 L/min to maintain vertical temperature differentials within the tank below 3°C. A mere 5% reduction in flow rate can raise top-layer GPU junction temperatures by 8–10°C. Bypass filter pumps are also required to sustain coolant cleanliness.

Two-Phase Immersion Cooling – Indispensable auxiliary pumping
Primary circulation relies on passive phase-change heat transfer, yet condenser water circulation pumps, precision fluorinated fluid makeup pumps, and emergency circulation pumps remain mandatory.

 Special Pump Requirements for Immersion Cooling

Recommended Tiered Pumping Architecture

Primary Pumps (Main Circulation): High-flow stainless steel centrifugal pumps for bulk circulation, N+1 redundant configuration, variable frequency speed regulation.

Secondary Pumps (Precision Loops): JONSN MR series miniature precision magnetic gear pumps, used for hot-spot flow enhancement, precise bypass filtration control, and quantitative coolant makeup.

Tertiary Auxiliary Pumps: Condenser water circulation, emergency fluid makeup, and system priming & draining.

▼ Conclusion: Pumps Are the Core of the Liquid Cooling Era

When cooling precision tightens to ±1°C, when coolants cost thousands of RMB per liter, and when every minor pressure pulsation threatens GPU service life — pumps transcend ordinary fluid equipment to become strategic core components of liquid cooling systems.

Selecting the right pump defines the reliability baseline of your entire liquid cooling system. JONSN precision magnetic gear pumps deliver long service life, compact dimensions, and three years of maintenance-free operation, redefining industry standards for core liquid cooling components through structural design advantages.