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Maxref R‑507 is a non‑ozone‑depleting hydrofluorocarbon (HFC) blend designed as a direct replacement for R‑502 in low- and medium-temperature refrigeration systems. It offers robust performance and reliability in demanding commercial environments, including supermarkets, transport refrigeration, cold storage, and industrial freezers.
Blend Composition: A 50/50 azeotropic mixture of HFC-125 (Pentafluoroethane) and HFC-143a (1,1,1-Trifluoroethane) by weight
Efficiency & Capacity: Comparable or slightly superior to R‑502, with around 6% higher capacity and slightly improved theoretical efficiency
Lower Compressor Discharge Temps: Up to ~7.4 °C (13 °F) cooler than R‑502, potentially extending compressor lifespan and improving oil stability
Stable Performance Post-Leakage: As an azeotrope, R‑507 maintains performance even after recharge cycleS
Operational Conditions: Boiling point of about –46.7 °C (–52 °F) at 1 atm, making it well-suited for low‑temperature application.
Lubricant Requirements: Requires polyolester (POE) oils—monitoring and ensuring proper miscibility is critical. Mineral or alkyl benzene oils are incompatible.
Retrofit Advisories: For R‑502 system conversions, aim to replace at least 95% of original mineral oil, install a molecular sieve-type drier (XH9 preferred), upgrade expansion valves, and consider condenser upsizing for optimal efficiency
Safety Classification: ASHRAE A1 (non‑flammable, low toxicity); Group L1 status
Health & Hazard Profile:
Colorless, volatile liquefied gas—high-pressure risk if heated
May cause asphyxiation in confined spaces; vapors heavier than air
Frostbite risk on direct contact; decomposition at >250 °C can release hazardous byproducts like hydrofluoric acid (HF)
| Feature | Specification |
|---|---|
| Blend Composition | 50/50 HFC-125 / HFC-143a |
| ODP / GWP | 0 / ~3,900–3,985 |
| Cooling Performance | Similar or superior to R-502 |
| Compressor Discharge Temp | ~7 °C lower than R-502 |
| Lubricant Requirement | Polyolester (POE) oil |
| Safety Rating | ASHRAE A1 (non-flammable, low toxicity) |
| Storage & Transport | Cool, ventilated; UN3163, Class 2.2 |
| Regulatory Handling | Recovery required; no venting permitted |
Efficiency & Capacity: Comparable or slightly superior to R‑502, with around 6% higher capacity and slightly improved theoretical efficiency
Lower Compressor Discharge Temps: Up to ~7.4 °C (13 °F) cooler than R‑502, potentially extending compressor lifespan and improving oil stability
Stable Performance Post-Leakage: As an azeotrope, R‑507 maintains performance even after recharge cycleS
Operational Conditions: Boiling point of about –46.7 °C (–52 °F) at 1 atm, making it well-suited for low‑temperature application.
Lubricant Requirements: Requires polyolester (POE) oils—monitoring and ensuring proper miscibility is critical. Mineral or alkyl benzene oils are incompatible.
Retrofit Advisories: For R‑502 system conversions, aim to replace at least 95% of original mineral oil, install a molecular sieve-type drier (XH9 preferred), upgrade expansion valves, and consider condenser upsizing for optimal efficiency
Safety Classification: ASHRAE A1 (non‑flammable, low toxicity); Group L1 status
Health & Hazard Profile:
Colorless, volatile liquefied gas—high-pressure risk if heated
May cause asphyxiation in confined spaces; vapors heavier than air
Frostbite risk on direct contact; decomposition at >250 °C can release hazardous byproducts like hydrofluoric acid (HF)
| Feature | Specification |
|---|---|
| Blend Composition | 50/50 HFC-125 / HFC-143a |
| ODP / GWP | 0 / ~3,900–3,985 |
| Cooling Performance | Similar or superior to R-502 |
| Compressor Discharge Temp | ~7 °C lower than R-502 |
| Lubricant Requirement | Polyolester (POE) oil |
| Safety Rating | ASHRAE A1 (non-flammable, low toxicity) |
| Storage & Transport | Cool, ventilated; UN3163, Class 2.2 |
| Regulatory Handling | Recovery required; no venting permitted |
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