Duct Electric Heater is mainly used for heating air in ducts. Specifications are divided into three types: low temperature, medium temperature, and high temperature. A common structural feature is the use of steel plates to support the electric heating tubes to reduce vibration. The junction box is equipped with an over-temperature control device. In addition to over-temperature protection, an interlock device must be installed between the fan and the heater to ensure that the heater starts only after the fan starts. A differential pressure device should be added before and after the heater to prevent fan failure. The gas pressure for duct heaters generally should not exceed 0.3Kg/cm2. If it exceeds the above pressure specification, please choose a circulating electric heater. The maximum heating temperature for low-temperature heaters is 160°C; for medium-temperature, it does not exceed 260°C; for high-temperature, it does not exceed 500°C.
2. Application Fields of Duct Electric Heater:
The duct electric heater is mainly used to heat the required air flow from the initial temperature to the desired air temperature, up to a maximum of 850°C. It has been widely used in aerospace, weaponry, chemical industry, and many scientific research and production laboratories in universities. It is especially suitable for automatic temperature control and large-flow high-temperature combined systems and accessory tests. The air electric heater has a wide range of applications: it can heat any gas, producing hot air that is dry, non-conductive, non-flammable, non-explosive, non-corrosive, non-polluting, safe, and reliable, with rapid temperature rise in the heated space (controllable).
3. Technical Features of Duct Electric Heater:
1. Can heat air to very high temperatures, up to 450°C, while the shell temperature is only about 50°C.
2. High efficiency: up to 0.9 or more.
3. Fast heating and cooling rates, up to 10°C/S, with quick and stable adjustment. There will be no lead or lag in the controlled air temperature, preventing temperature control drift, making it very suitable for automatic control.
4. Good mechanical performance: Because the heating element is made of special alloy material, it has better mechanical performance and strength than any other heating element under the impact of high-pressure air flow, which is advantageous for systems and accessory tests that require continuous air heating for long periods.
5. Durable and long-lasting, with a service life of several decades when used in accordance with operating procedures.
6. Clean air and small size.
7. Multiple types of air electric heaters can be designed according to user needs.
4. Specifications and Models of Duct Electric Heater:
5. Explosion-proof Grade of Duct Electric Heater:
ExdⅡBT1-6 ExdⅡCT1-6
Single unit power ranges from 2KW to 10000KW series.
