The Difference Between Refrigerant R417a and R22

the difference between refrigerant r417a and r22

R417a is a refrigerant composed of a mixture of R125, R134a, and R600. Its boiling point at standard atmospheric pressure is -41.8°C, while R22 is -40.8°C, and the critical pressure is 615Pa. The critical pressure of R22 is 723.6Pa, which is basically close and is one of the alternative refrigerants for R22.

R22 is a colorless, almost odorless gas at room temperature, non-flammable, non-explosive, non-corrosive, slightly more toxic than R12, but still a safe refrigerant, classified as A1 and can be liquefied into colorless and transparent under pressure liquid. The chemical stability and thermal stability of R22 are very high, especially in the absence of moisture, it will not react with general metals below 200 °C. Only works slowly with bases in the presence of water. But cracking occurs at high temperatures.

R417a is miscible with existing refrigeration oils and is suitable for use in typical R22 direct expansion (DX) systems. It is very close to R22 in operating pressure and efficiency. It is a long-term solution to replace R22 and does not require changes to equipment and systems. It is suitable for various air conditioners and refrigeration units using R22.

At present, R417A occupies more than 80% market share in the European replacement refrigerant market and is widely used in the replacement of central air-conditioning refrigerants in shopping malls, hotels, supermarkets, and offices. Its characteristics of energy saving, environmental protection, high efficiency, and simple replacement (no need to change compressors and expansion valves) have made it the first choice for replacing R22 in Europe. Especially the new energy-saving refrigerant of choice for air source heat pump water heaters.

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