The LQCOL PLUS Liquid-Cold System Expansion Tank is designed specifically for liquid cooling systems and secondary loops (CDU) in data centers. It effectively absorbs coolant volume changes caused by severe temperature fluctuations during high-density AI and HPC computing workloads. By dynamic expansion accommodation and pressure compensation, it prevents excessive pressure spikes, protects quick disconnects (QDs) and cold plates, and safeguards critical server components from leaks.
• All-Stainless Steel: SUS304 shell with electropolishing to ensure zero corrosion and pure fluid quality.
• Coated Carbon Steel: Heavy-duty carbon steel with Triple-Grade Paint for superior exterior durability.
• 304 SS Connector: 3/4″ G/NPT/BSP connection prevents rust at system joints.
• 100% PG25 Compatibility: No rubber swelling, plasticizer leaching, or fluid contamination.
• High Temp & Low Permeability: Supports up to 90°C (194°F) continuous operation and prevents vapor locks.
• Stable N₂ Cushion (2 bar / 30 psi): Prevents pressure drift caused by ambient temperature changes.
• 10+ Year Maintenance-Free: Oxygen-free chamber stops interior oxidation for a long service life.
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• AI & HPC Data Centers: High-density server racks (>100 kW TDP) requiring extreme liquid cooling reliability.
• CDU Secondary Loops: Closed-loop pressure compensation between CDUs and server cold plates.
• Direct-to-Chip & Immersion Cooling: Precision cooling loops needing zero micro-leakage and pure coolant flow.
• Tailored for both In-Rack and In-Row CDUs, offering ultra-compact designs (0.5L / 1L / 3L) for space-constrained server racks and high-volume tanks (24L / 60L / 100L+) for rack-level and row-level cooling.
• Hyperscaler Infrastructure: Built for zero single point of failure (ZSPOF) standards.
LIQUID-COLD SYSTEM EXPANSION TANK - LQCOL PLUS
| Model Number | Total Tank Volume | Diameter | Height | Box Length | Box Width | Box Height | N.W. | G.W. | Shipping Volume | Connection | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Liter | Gal | Cm | Inch | Cm | Inch | Cm | Inch | Cm | Inch | Cm | Inch | Kg | Lbs | Kg | Lbs | CUF | ||
| LQC- 3 | 3 | 0.8 | 14.0 | 5.5 | 20.8 | 8.2 | 31.0 | 12.2 | 31.0 | 12.2 | 24.0 | 9.4 | 4.1 | 9.0 | 4.7 | 10.4 | 0.81 | 3/4" G/NPT/BSP |
| LQC - 8 | 8 | 2.0 | 20.3 | 8.0 | 29.9 | 11.8 | 21.0 | 8.3 | 21.0 | 8.3 | 32.0 | 12.6 | 1.9 | 4.2 | 2.3 | 5.1 | 0.50 | 3/4" G/NPT/BSP |
| LQC -12 | 12 | 3.2 | 22.9 | 9.0 | 37.1 | 14.6 | 23.5 | 9.3 | 23.5 | 9.3 | 39.0 | 15.4 | 2.7 | 6.0 | 3.0 | 6.6 | 0.76 | 3/4" G/NPT/BSP |
| LQC -18 | 18 | 4.5 | 28.0 | 11.0 | 37.9 | 14.9 | 28.0 | 11.0 | 28.0 | 11.0 | 39.0 | 15.4 | 3.4 | 7.5 | 3.8 | 8.4 | 1.08 | 3/4" G/NPT/BSP |
| LQC -24 | 24 | 6.0 | 29.0 | 11.4 | 40.5 | 15.9 | 31.0 | 12.2 | 31.0 | 12.2 | 42.0 | 16.5 | 3.6 | 7.9 | 4.5 | 9.9 | 1.42 | 3/4" G/NPT/BSP |
| Model Number | Total Tank Volume | Diameter | Height | Box Length | Box Width | Box Height | N.W. | G.W. | Shipping Volume | Connection | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Liter | Gal | Cm | Inch | Cm | Inch | Cm | Inch | Cm | Inch | Cm | Inch | Kg | Lbs | Kg | Lbs | CUF | ||
| LQC-8SS | 8 | 2.0 | 20.3 | 8.0 | 28.1 | 11.1 | 21.0 | 8.3 | 21.0 | 8.3 | 32.0 | 12.6 | 2.1 | 4.6 | 2.4 | 5.3 | 0.50 | 3/4" G/NPT/BSP |
| LQC-18SS | 18 | 4.5 | 28.0 | 11.0 | 35.9 | 14.1 | 28.0 | 11.0 | 28.0 | 11.0 | 39.0 | 15.4 | 3.1 | 6.8 | 3.8 | 8.4 | 1.08 | 3/4" G/NPT/BSP |
| LQC-24SS | 24 | 6.0 | 29.0 | 11.4 | 39.9 | 15.7 | 31.0 | 12.2 | 31.0 | 12.2 | 42.0 | 16.5 | 3.6 | 7.9 | 4.5 | 9.9 | 1.42 | 3/4" G/NPT/BSP |
| LQC-60SS | 60 | 14 | 39.0 | 15.4 | 59.5 | 23.4 | 40.0 | 15.7 | 40.0 | 15.7 | 62.0 | 24.4 | 9.4 | 20.7 | 10.7 | 23.6 | 3.50 | 3/4" G/NPT/BSP |
| Shell | Cold Rolled Carbon Steel / Stainless Steel |
| System Connection | 304 Stainless Steel Connector |
| Coating | Triple Grade Paint |
| Diaphragm | EPDM Rubber |
| Factory Pre-charge | 30 PSI / 2 Bar |
| Max. Working Temperature | Cold Rolled Carbon Steel: 90°C / 194°F |
| Stainless Steel: 120°C / 248°F | |
| Max. Working Pressure | 150PSI / 10bar |
A: As high-power AI servers surge past 100 kW/rack, severe temperature swings cause coolant to expand and contract. The LQCOL PLUS absorbs coolant expansion, prevents pressure spikes, eliminates pump cavitation, and safeguards quick disconnects and cold plates from leaks.
A: Yes. Our peroxide-cured EPDM diaphragm is specially formulated for 25% Propylene Glycol (PG25) and deionized water. It resists rubber swelling, hardening, and plasticizer leaching, ensuring long-term fluid purity and conductivity.
A: The All-Stainless Steel (SUS304/316L) model is built for high-purity fluid loops with electropolished inner walls. The Carbon Steel model features a heavy-duty cold rolled carbon steel shell with a Triple-Grade Protective Coating for outstanding exterior corrosion resistance. Both feature a 304 SS connector.
A: The factory 2 bar (30 psi) 99.9% dry nitrogen charge eliminates internal moisture and oxygen. This stops internal oxidation and prevents pressure drift caused by ambient temperature changes, enabling a 10+ year maintenance-free lifespan.
A: When coolant contracts due to sudden server load drops, a localized vacuum can occur. The tank provides continuous dynamic positive pressure, keeping pump inlet pressure stable to eliminate vapor bubble collapse, reducing pump noise and impeller wear.
A: Yes. While factory pre-charged to 2 bar (30 PSI) with high-purity nitrogen, the pre-charge pressure can be fine-tuned via the top air valve prior to installation to match your loop’s minimum operating pressure requirement.
A: The electropolished stainless steel body or triple-coated shell prevents corrosion particles, while the EPDM diaphragm leaves zero chemical residues. This stops particle buildup in cold plate micro-channels and absorbs pressure spikes that cause QD leaks.
