NVIDIA GB300 Liquid-Cooling Flexible Bellows

Flexible Bellows specifically designed for the liquid cooling system of the NVIDIA GB300 (Blackwell Ultra) NVL72 supercomputing-class AI server. Its core features are fully optimized for the extreme operating conditions of 1000–1400 W/GPU, 35 W/cm² high heat flux density, and high-pressure, high-frequency, and high-purity environments.

1. Extreme Pressure Resistance and Zero-Leak Reliability (Compatible with GB300 High-Pressure Systems)

Material: SUS316L seamless stainless steel (ultra-low sulfur <0.03%), resistant to ionic leaching and coolant corrosion

Pressure Resistance: Operating pressure 8–10 bar, burst pressure ≥120 bar (12 MPa), withstands transient power surges (1.4 times steady-state)

Sealing: Dual O-rings + metal-to-metal seal (ORFS), leakage rate <1×10⁻⁹ Pa·m³/s (semiconductor grade)

Lifespan: Fatigue life ≥100,000 cycles, compatible with GB300’s 15-year long-term operation and maintenance

2. Ultra-High Flexibility and Stress Compensation (Compatible with NVL72 High-Density Racks)

Multi-dimensional Compensation: Axial expansion ±12%, radial bending ±30°, torsion ±5°

Low Reaction Force: Minimal elastic reaction force, protecting cold plate connectors and the microchannel structure of 72 GPU cold plates

Space Adaptability: Small tube diameter and tight bending radius, compatible with 1U/2U modules and dense layouts of 252 pairs of quick-connect fittings

3. Ultra-Low Flow Resistance and High Flow Rate Compatibility (Supports 30–200 L/min High Flow Rates)

Inner Wall: Electrolytic polishing (Ra ≤0.4 μm), turbulence optimization, 40% reduction in pressure drop

Flow Velocity: Withstands high-speed flow of 2–4 m/s; supports 8 L/min per tray and >1000 L/min system-wide circulation

Contaminant-Free: One-piece molding with no weld seams; eliminates debris blockage in GB300 <0.3 mm microchannel cold plates

4. High Thermal Stability and Media Compatibility (Suitable for full liquid cooling applications)

Temperature Range: -50°C to 230°C, covering all media including deionized water, ethylene glycol, and fluorinated fluids (PG25/3M)

Insulation: Flame-retardant insulation (3 kV), preventing internal short circuits and electromagnetic interference

Temperature Equalization: Efficiently compensates for thermal expansion and contraction caused by 50–60°C temperature differences in the circulation loop

5. Vibration Damping, Noise Reduction, and Data Center-Grade Stability

Vibration Damping: Absorbs high-frequency vibrations (500–2000 Hz) from GPUs, fans, and pumps

Noise Reduction: Minimizes pipeline resonance; overall sound pressure <45 dB(A) (office-grade server room)

Corrosion Resistance: Salt spray test >1000 hours, surface hardening (HV >350), wear- and scratch-resistant

6. Design Highlights Customized for GB300/NVL72

Quick-Connect Compatibility: Compatible with NVUQD03 micro quick-connectors (1/3 the size of previous generations)

Color-Coded Tubing: Blue (inlet)/Red (return) with heat-shrink labels, ensuring zero operational errors

Anti-vibration Loosening: End-cap anti-loosening structure, suitable for long-term thermal cycling in 72-GPU racks

Clean Pre-treatment: C.D.A. Class 3 cleaning (ASTM B912), protects CDU and cold plates

Summary of Core Advantages (GB300-Specific)

High-Pressure, High-Flow Reliability: Withstands extreme operating conditions of 10 bar, 200 L/min, and 1400 W/GPU

Zero Leaks, Zero Blockages: 316L seamless construction + ultra-high cleanliness, protecting microchannel cold plates

Ultimate Flexibility: Free tubing routing within 72-GPU dense racks, efficiently compensating for stress

15 Years Maintenance-Free: Far exceeds EPDM lifespan, reducing TCO by 30%+