Glacier Coolant LM-4Y Modified Diol Low-Conductivity Coolant -35°C To 150°C

Glacier Coolant LM-4Y is a specialized industrial coolant designed for data center cooling systems. It operates in indirect contact mode, transferring heat generated by servers during operation to reduce server temperatures. Formulated with modified diols and composed of organic composite corrosion inhibitors, antioxidants, antifoam agents, and deionized water, this product features low conductivity and is free of silicon, phosphonates, nitrite, and other salt components.

LM-4Y offers excellent anti-rust performance for aluminum, carbon steel, stainless steel, copper, and other metals. It operates reliably from -35°C to 150°C when prepared to appropriate concentrations. At 40% concentration, the freezing point is -23.5℃, boiling point is 105.5℃, and conductivity ranges from 440 to 670 µs/cm at 20℃.

The coolant incorporates Glacier Coolant's proprietary Modify 2000 composite modification technology, offering strengthened specific heat and thermal conductivity, reduced viscosity, inhibited volatilization, sterilization and scale inhibition, multiple anti-rust factors, and wide temperature range resistance.

The anti-rust protection system uses pure natural organic acids and organic bases, completely free of salt substances. These organic components form stable coordination bonds with metals, creating a dense super anti-rust film on the metal surface that avoids electrochemical corrosion caused by direct metal contact. This system not only effectively inhibits metal oxidation but also continuously consumes dissolved oxygen in the system, preventing oxygen diffusion to the metal surface.

LM-4Y is compatible with non-metallic materials including PVC, fluororubber, latex, HDPE, natural rubber, PP, silica gel, and PTFE. Regular monitoring of concentration, pH, anti-rust performance, and conductivity is recommended for long-term operation.
As part of Glacier Coolant's 30 years of expertise in secondary refrigerant manufacturing, the LM-4Y series delivers a reliable, low-conductivity cooling solution for modern data center applications.

LM-4Y Glacier Coolant features low electrical conductivity, high specific heat, strong cooling capacity, and excellent anti-rust performance. It provides outstanding rust protection for metals including aluminum, carbon steel, stainless steel, and copper. When formulated to the appropriate concentration, it can be used as a coolant within a temperature range of –35 °C to 150 °C. Parameters at 20 °C for different concentrations and parameters at various temperatures for a 40 wt% dilution are shown in Tables 1 and 2, respectively.