MackFri® - 08a
MackFri® - 08a
ASHRAE Name : R-408A
(47% HCFC-22 / 7% HFC-125 / 46% HFC-143a)
The Blends for replacement of R-502.
MackFri®-08a refrigerant. Developed as an alternative to R502 during retrofit in the operating refrigeration systems. Near-zeotrope blend, consists of R22, R143a and R125 components. Intended for the use in the mobile transport refrigeration systems, as well as in industrial refrigeration facilities with piston and screw compressors.
MackFri®-08a and R502 at the same temperature have close pressures; condensation temperature is 10 К higher. Cold-productivity of the cycle is about 1...10 % higher, than at operation on R502.
MackFri®-08a liquid density is lower than that of R502 refrigerant and, as a consequence, required charging mass, that is available receivers, pipeworks and pumps designed for R502, can be used for MackFri®-08a.
Moreover, reduction of charging mass is important to keep in mind in small facilities in order not to allow re-charging to avoid increasing of pressure and consumed power. In small facilities, reduction of charging can reach 25 %, and in big ones - 15 %.
Packing: 10.9 Kg. (24 lb.) Net nonrefillable Steel cylinders and individual neutral carton outside.
- Acceptable Substitutes for Class I (CFCs) Substances in Commercial Refrigeration under the Significant New Alternatives Policy (SNAP) Program printed on December 18, 2000 as:
 a) replacement for CFC-502 in the Cold Storage Warehouses (R)
b) replacement for CFC-502 in the Ref. Transport (R)
c) replacement for CFC-502 in the Retail Food Ref. (R)
d) replacement for CFC-502 in the Ice Machines (R)
- Acceptable Substitutes for Class I (CFCs) Substances in Non-Commercial Refrigeration under the Significant New Alternatives Policy (SNAP) Program printed on December 18, 2000 as:
a) replacement for CFC-502 in the Industrial Process Refrigeration (R)
(R) = Retrofit Uses
Similar SUVA 408a, FX10, Genetron 408a, Forane FX10
Physical properties:
| Physical State |
R408A |
| Molecular mass, gm/mole |
87 |
| Freezing temperature, oС |
- |
| Boiling point at atmosphere pressure, oС |
-44,4 |
| Temperature glide at atmospheric pressure, К |
0,6 |
| Saturated liquid density at 25 oС, kg/dm3 |
1,062 |
| Saturated vapor density at boiling point, kg/m3 |
4,77 |
Vapor pressure, МPа:
at 25 oС
at 50 oС |
1,16
2,15 |
| Critical temperature, oС |
23,5 |
| Critical pressure, МPа |
4,34 |
| Critical density, kg/dm3 |
0,403 |
| Specific heat of vaporization at boiling point, kJoule/kg |
227 |
Heat conduction at 25 oС, Wt/(m*К):
liquid
vapor at 0,1013 МPа |
0,077
0,012 |
| Surface tension at 25 oС, mN*м-1 |
6,5 |
| Resolvability (at 0,1013 МPа) of water in the refrigerant at 25 oС, mas. % |
0,070 |
Specific thermal capacity at 25 oС, kJoule /(kg*К):
liquid
vapor |
1,53
0,80 |
| Thermal capacities proportion at constant pressure and constant capacity at 25 oС |
1,146 |
| Vapors inflammability in the air |
No |
| Flash point |
No |
| Ozone depletion potential ODP |
0,026 |
| Global warming potential GWP |
0,025 |
|
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