An air heater is an electric heating device that primarily heats a gas stream. The heating element of the air heater is a stainless steel electric heating tube, and the heater inner cavity is provided with a plurality of baffles to guide the gas flow direction, prolonging the residence time of the gas in the inner cavity, so that make the gas even heating to improve heat exchange efficiency. The heating element of the air heater is a stainless steel heating tube which is filled with a heating wire in a seamless steel pipe, and the gap portion is filled with a magnesium oxide powder shrink tube having good thermal conductivity and insulation. When the current passes through the high temperature resistance wire, the generated heat is diffused to the surface of the heating tube by the crystalline magnesium oxide powder, and then transferred to the heated air to achieve the purpose of heating.

Duct Air Heater
Specification: Low Temp. Medium Temp. High Temp
Gas Pressure: ≤ 0.3kg/cm2
Gas Heating Temp: ≤160 °C for Low Temp. Type
Gas Heating Temp: ≤260 °C for Medium Temp. Type
Gas Heating Temp: ≤500 °C for High Temp. Type

Pipe Air Heater
Gas Heating Temp.: 650 °C
Material: Stainless Steel
Heating element: stainless steel electric heating tube

Pipe air heater has been widely used in many research and production laboratories such as aerospace, weapons industry, chemical industry and higher education institutions. Particularly suitable for automatic temperature control and large flow high temperature combined system and accessory test. 

- Delivery & Packing

1.Safety Instruction

Thanks for purchasing this product from our company!

Please take care of this manual and ensure you have fully read this manual before operation .

DANGER:

Do not place the machine in the places where have flammable and explosive

materials.

Make sure it’s off power before carry, connection, test.

Do not touch any electric terminal when the machine is running.

Wet hand is not allowed to touch the machine.

Do not touch any exposed conductive part of the machine.

2.Rationale

The air is forced into the air heater by the air compressor，and the max temperature of the air can reach to 350℃，the temperature can be adjust by the temperature controller.

The signal of the outlet temperature is provided by the thermocouple which is installed in the outlet pipe.

When the temperature controller received the signal from the thermocouple, then the temperature controller will drive the SCR to work.

There’s another thermocouple which is installed in the flange heater, once the heater overheat, the thermocouple would output the signal and then the heater would shut down automatically.

Power: 380V 50Hz.

3.Specification

Medium: air

Flow: 1800m³/h

Working pressure: 0.15Mpa

Design pressure: 0.19Mpa

Working temperature: inlet - 20℃, outlet - max 350℃

Heating power: 300KW

Power: 380V 50Hz, 3 phase

Heating element: ‘U’ type, 3600W, 90pcs, 2.05W/cm²(6 pcs for spare)

Qty.: 2 sets

Work place: Indoor

Control cabinet: Indoor

Weight: 1500KG

4.Structure

The whole air heating system includes heating elements, flange heaters, terminal box, barrel and the control cabinet.

The flange heater is installed in the barrel, and the terminal box was combined with the flange heater.

The heating barrel: stainless steel seamless pipe.

The flange heater

Shell: stainless steel

Resistance wire: Cr20Ni80

withstand voltage：1800V/min

Sealing gasket: Spiral Wound Gasket

Thermal insulation layer: alumina silicate fiber, thickness≥150mm.