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Klea® 407C
Klea® 407C (R-407C) proven R-22 replacement for air conditioning and refrigeration systems
Overview
Klea® 407C is a high-performance HFC refrigerant blend formulated as a reliable alternative to R-22 in a wide range of air conditioning, chilling, and refrigeration applications. It was one of the first commercially adopted R-22 replacements and remains a trusted choice for both retrofit projects and new system designs.
Composed of R-32, R-125, and R-134a, Klea® 407C delivers cooling capacity, energy efficiency, and pressure characteristics similar to R-22—ensuring smooth transition and strong system performance. It is fully compliant with EU F-Gas regulations for use beyond 2030.
Key benefits
- Excellent R-22 match – similar cooling capacity, efficiency, and pressures
- Versatile – suitable for both original equipment and retrofitted systems
- Lower GWP alternative compliant with long-term regulatory goals
- Non-ozone depleting (ODP = 0)
- ASHRAE A1 classification – non-toxic, non-flammable
- Service-friendly – can be topped off after a leak with minimal impact on performance
Applications
- Residential and commercial air conditioning
- Heat pumps
- Chillers
- Medium-temperature refrigeration systems
- Retrofit of R-22 and R-502 systems (with evaporator temperatures above -6.7 °C / 20 °F)
Composition (by weight)
- R-32: 23%
- R-125: 25%
- R-134a: 52%
Physical properties
| Property | S.I. Units | Value | British Units | Value |
|---|---|---|---|---|
| Molecular weight | Kg/Kmol | 86.20 | lbm/lbmol | 86.20 |
| Critical temperature | °C | 86.03 | °F | 186.85 |
| Critical pressure | bara | 46.29 | psia | 671.42 |
| Critical density | kg/m³ | 484.20 | lb/ft³ | 30.23 |
| Atmospheric bubble point | °C | -43.627 | °F | -46.5 |
| Atmospheric dew point | °C | -36.629 | °F | -33.9 |
| Latent heat of vapourisation at atmospheric pressure | kJ/kg | 256.29 | BTUIT/lb | 110.18 |
| Saturated vapour density at atmospheric pressure | kg/m³ | 4.6306 | lb/ft³ | 0.29 |
| Liquid vapour pressure @25°C | bara | 11.903 | psia | 172.6 |
| Coefficient of volumetric thermal expansion for saturated liquid at 25°C | °C⁻¹ | 0.0040236 | °F⁻¹ | 0.00224 |
| Speed of sound* for saturated vapour at 25°C | m/s | 154.97 | ft/s | 508.43 |
| Adiabatic exponent* for saturated vapour at 25°C | – | 1.33 | – | 1.33 |
| Latent heat of vapourisation at 25°C | kJ/kg | 188.42 | BTUIT/lb | 81.01 |
| Saturated vapour density at 25°C | kg/m³ | 43.77 | lb/ft³ | 2.73 |
| Saturated vapour density at 0°C | kg/m³ | 19.689 | lb/ft³ | 1.23 |
*) Vapour composition as per bulk refrigerant at dew point
Get in touch
For more information, please contact our team. Please note that product availability may vary by region.