Single unit power from 2KW to 500KW series.
In control, a linkage device must be added between the fan and the heater to ensure that the heater starts, which should be carried out after the start of the fan. After the heater stops working, the fan must be delayed for more than 3 minutes to prevent the heater from overheating and damage. In connection with single circuit connection, NEC standard must be complied with, and the current of each branch shall not exceed 48A. The gas pressure heated by the channel heater generally does not exceed 0.3kg/cm2. If it exceeds the above pressure specifications, please choose the circulating heater. The maximum temperature of gas heating in low temperature heater is not more than 160 C, medium temperature heater is not more than 260 C, and high temperature heater is not more than 500 C.
The service life of duct heaters has always been a matter of great concern. The longest service life of imported heaters can be up to 10 years, while domestic heaters vary according to temperature. Generally, low temperature heaters have the longest service life and high temperature needs to be detected frequently.
Many domestic manufacturers of low-temperature heaters can meet the national standards, but the high-temperature long-life duct heaters, because of the constraints of process, materials, testing standards and other factors, can not produce too many manufacturers, domestic more famous Shanghai Shanglong, Shanghai Dire and other first-line brand heater manufacturers can generally guarantee a long continuous service life (3000-10000 hours 4-12). Months). Many second-tier brands are generally guaranteed in half a year to one year, but in practice, if used continuously, problems may arise for various reasons.
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