What type of coolant is required for the SR40 V3 system?
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- Issue Time
- Mar 13,2026
Short answer
Two loops, two fluids. The primary loop serving the hardware runs pure, deionized or specially treated water for maximum thermal conductivity and corrosion protection. The external loop to the dry towers runs a water-and-industrial-glycol mixture formulated for the site's minimum ambient temperature.
- Primary loop: deionized or treated water
- Prevents galvanic corrosion in hardware
- Secondary loop: water + industrial glycol
- Glycol mix set to site minimum temp
Why each loop uses a different fluid
- Primary loop optimizes heat transfer. Water has the highest specific heat capacity of the practical options.
- Treated water protects the hardware. Deionized or specially treated water prevents galvanic corrosion inside the mining hardware.
- Secondary loop buys freeze protection. Industrial glycol keeps the outdoor loop liquid at the region's minimum temperatures.
- There is a trade-off. Higher glycol concentrations add protection but slightly reduce heat dissipation efficiency.
Concentration is engineered, not generic
Glycol ratio is set against your deployment region. The mixture is formulated for the minimum ambient temperature at the site — and reviewed against coolant degradation guidance over the operating cycle.