Lunx AB Refrigeration

Buy 99.9% Quality R503 Refrigerant Gas

R503 Refrigerant Gas,Very low temperature refrigeration systems typically operate in two or more stages (cascade type systems)

Buy 99.9% Quality R503 Refrigerant Gas

R503 Refrigerant Gas,Very low temperature refrigeration systems typically operate in two or more stages (cascade type systems). It would be nearly impossible to achieve low temperatures in a single stage with an inexpensive compressor. The traditional cascade system has a low temperature stage which uses the lower boiling point gas, such as R-13 or R-503, and a high stage which typically uses R-12, R-22, or R-502. The high stage evaporator provides the correct condensation temperature for the low stage so that compressors in both stages can run at “normal” pressures.

R503 Refrigerant Gas

Part Number Description

Buy  Quality R503 Refrigerant Gas.

Application: Medium and low temp refrigeration applications, appliances. Retrofitting R-12 or blends used to previously retrofit R-12 systems.Performance: Similar capacity and efficiency to R-12. Higher pressures, similar to R-401A and R-409A

Lubricant: R-450A requires polyolester (POE) lubricant. Follow manufacturer’s recommendations for changing mineral oil to POE.

R503 Refrigerant Gas Characteristics

• Suitable low GWP retrofit replacement for R134a in DX supermarket refrigeration applications, R450A delivers a comparable carbon footprint in medium temperature applications
• Polyolester oil is recommended with R450A to ensure adequate oil return
• The same POE oil as R134a can be used with minimal adjustment to TX valves
• The small glide of R450A is of no effect in most DX systems
• Slightly reduced capacity compared to R134a
• Highly efficient when used in systems designed for R450A

How R-448A compare to R-404A?

R-448A has a similar cooling capacity with improved energy efficiency compared to R‑404A. In many cases the compressor discharge temperature will not be a concern but for some low temperature applications, under the same operating conditions,R‑448A will exhibit a significantly higher compressor discharge temperature than R‑404A which, in a retrofit situation, may need to be managed.Full theoretical performance comparisons at customer specified conditions are available from Lunxabrefrigeration on request.

Packaging and Supply

  • Lunxabrefrigeration supply R-448A in 10kg, 19kg or 53kg returnable cylinders.
  • Conforms to AHRI 700-2016 specifications.


Composition HFC-32/HFC-125/R-1234yf/HFC-134a/HFO-1234ze(E) – 26/26/20/21/7% mass
Chemical Formula CH2F2/CHF2CF3/CF3CF=CH2/CF3CH2F/CHF=CHCF3 (trans)
Molecular Mass 86.28
Boiling Point (at 1 Atmosphere) -46.1°C
Dew Point (at 1 Atmosphere) -39.9°C
Saturated Liquid Density at 25°C 1097.2 kg/m³
Saturated Vapour Density at 1.013bar 4.703 kg/m³
Saturated Liquid Pressure at 25°C 12.876 bar
Saturated Liquid Pressure at 50°C 23.728 bar
Critical Temperature 82.7°C
Critical Pressure 45.945 bar
Critical Density 477.3 kg/m³
Critical Volume 0.00210 m³/kg
Latent Heat of vapourisation at 1.013bar 241.5 kJ/kg
Thermal Conductivity of Liquid at 25°C 81.2 mW/(m.K)
Thermal Conductivity of Vapour at 25°C & 1.013bar 13.6 mW/(m.K)
Surface tension at 25°C 5.96 mN/m
Viscosity of Liquid at 25°C 0.138 mPa.s
Viscosity of Vapour at 25°C & 1.013bar 0.012 mPa.s
Specific heat of liquid at 25°C 1.555 kJ/(kg.K)
Specific heat of vapour at 25°C and 1.013bar 0.8497 kJ/(kg.K)
Cp/Cv ratio at 25° and 1.013 bar 1.141
Lower Fammability Limit (LFL) in air (EN 378) None
Flash Point None
ISO 817 / ASHRAE 34 Safety Classification A1
PED Fluid Group 2
Ozone Depletion Potential (ODP) 0
Global Warming Potential (GWP) IPCC AR4/IPCC AR5 1387/1273

R503 Refrigerant Gas for sale,Buy R503 Refrigerant Gas online,Order R503 Refrigerant Gas,Quality R503 Refrigerant Gas for sale.Top Quality R503 Refrigerant Gas

Most modern refrigerants are zero ODP, however refrigeration units older than 20 years may still use R12 or R22 . Most modern lab-grade freezers use R404A refrigerant, which has a GWP of 3,920. Ultra-low temperature freezers also use R508B as the secondary refrigerant, which has a GWP of 13,396.


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