Complaint
The air radiator is the main device of the heat exchangers using a cold medium and a heat medium for air cooling or heating. It can heat air if fed with high-temperature water, steam or heat transfer oil, or cool air if fed with saltwater, so it is extensively used in the warm-air heating, air-conditioning, cooling, condensing, dehumidifying and drying in fields such as light industry, architecture, chemical industry, machinery, textile, printing and dyeing, electronics, food, pharmaceutical industry, metallurgy, wood, plastics, rubber, etc.SRZ air heater can be used for the air heating purpose of both steam systems and hot water systems. It is mainly used for the air heating of warm-air heating system, air-conditioning systems, and drying devices. As the main part of air heating devices, it is widely used in the heating and ventilation systems of the large buildings of present industrial and mining enterprises. The heat medium of the air radiator may be steam, hot water or heat transfer oil. The operating pressure of steam is 0.2 MPa to 1.6MPa; the temperatures of hot water and heat transfer oil are about 70ºC to 150ºC and 160ºC to 300ºC respectively. Selection principles, steel standards, thermal treatment states and permissible stress values of the materials of the pressure parts should be subject to requirements of the GB 150. The pressure parts used in inflammable, fatal or toxic operating environments should be made of cast iron. The common parent tube materials include carbon steel Q235B, 20#, 304, 316, copper tube, etc. The common fin materials include carbon steel, 304, 316, aluminum, etc. See Table 2 for the common materials of other parts. Table 2 Materials
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| Material name | Code | Applicable temperature | Applicable place |
| NBR | N | -20~110ºC | Water, non-polar oil, mineral oil, lubricating oil, silicon oil, etc. |
| EPDM | E | -20~150ºC | Steam, water, ozone, polar chemical mediums, alcohol, weak acids, weak bases, salt solutions, etc. |
| Chloroprene rubber | C | -40~100ºC | Ammonia, mineral roil, lubricant, freon, etc. |
| Fluororubber | F | 0~180ºC | Inorganic acids, bases, mineral oil, halohydrocarbon and oxidant |
| Silicon rubber | Q | -40~200ºC | Food field, etc. |
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