-What type of pumping technology can be used to transport the glacial-grade refrigerant LM-8 at 45℃?
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What type of medium is cryogenic refrigerant? Is it corrosive, and are there any requirements regarding the material of the pump? Given limited costs, what other pumps can be used as a substitute for shielded pumps?
Both centrifugal pumps and magnetic drive pumps work fine
The mechanical seal of a centrifugal pump cannot withstand such low temperatures
It’s fine, we have minus 38 degrees here, no problem
The cryogenic refrigerant mentioned by the poster has been used by our company; it is a type of coolant that serves as a replacement for traditional coolants such as ethylene glycol and brine. It features strong cooling capacity, a wide operating temperature range, good stability, and does not corrode metals. If you have any questions, you can contact the manufacturer at 134-7025-9205
The pump isn’t very large; if shielded pumps are too expensive, then opt for mechanically sealed pumps. This temperature level is not a problem, and magnetic drive pumps in this range may be even more expensive than shielded pumps of the same class.
Composition and properties of LM-4 glacier refrigerant: LM-4 glacier refrigerant is composed of modified diols, with main additives including corrosion inhibitors, mildew inhibitors, solubilizers, and water stabilizers. It appears as a light-colored liquid, is safe and low in toxicity, has no odor, is not flammable, and does not volatilize easily. At 20°C, the density is 1.105 g/cm3, the specific heat is 0.598 cal/g·°C, the viscosity is 12.5 mPa·s (cP), and the thermal conductivity is 0.26 W/m·K. The boiling point is higher than 150°C, the freezing point is lower than -50°C, and the flash point is 120°C. Uses and applications: The LM-4 type glacial refrigerant boasts advantages such as low toxicity, low flammability, high specific heat, strong cooling capacity, and good rust resistance. It can be used as an industrial refrigerant in a temperature range of -35°C to 150°C. When in use, it should be applied separately according to the process requirements. When used in combination with traditional refrigerants, an appropriate amount of Glacier refrigerant booster should be added.