Home / Air Blow Heater / The guide to the Air Blow Heater / Chapter 1.Basic knowledge of Air Blow Heater / 1-2.DGH series Air Blow Heater (For Clean Room Double Glass Tube Type Air Blow Heater)

1-2.DGH series Air Blow Heater (For Clean Room Double Glass Tube Type Air Blow Heater)

  1. Hot air blow output
  2. Tapered Screw
  3. Thermocouple for output air temperature
  4. Air output connector Nickel plated Bras
  5. Metal case cover Quartz glass tube
  6. Heat element cover Quartz glass tube
  7. Metal case stainless SUS304
  8. Heat element Fe-Cr-Al alloy
  9. Insulating silicon rubber
  10. Mount base Steatite
  11. Stoper Silicon rubber
  12. Heat proof silicon rubber
  13. Thermocouple for output air Glass cloth or Silicon rubber
  14. Power wire Glass cloth or Silicon rubber
  15. Thermocouple for heat element Glass cloth or Silicon rubber
  16. Air input connector Nickel plated Bras
  17. Tapered Screw
  18. Air input

Features of DGH Series

As for the heating element and the sensor, DGH series is sealed by the capsule of quartz  glass.

Therefore, neither heating element nor sensor touches heating gas directly.

Dust, such as an oxide generated from these, does not mix in heating gas.

Heating element is the system which heats passage gas through a quartz capsule.

Heat transfer efficiency is more inferior than ABH type.

Therefore, the highest hot wind temperature is about 500 ℃.

This heating element should be used in oxidative atmosphere.

Outside air is supplied by respiration through the above “Heatproof rubber tube” in the capsule.

The pressure increase by the thermal expansion of the inside gas of the capsule is also missed through this rubber tube.

The accuracy of the built-in temperature sensor (Optional parts)

The setup of heating temperature should measure the heating subject directly.

The built-in temperature sensor of the option should use the temperature at that time for

an operation monitor, carrying out it. The reproducibility of temperature is good.

When heaters are exchanged, the heating subject is measured directly and operation monitor temperature certainly needs to be re-set up.

Built-in temperature sensor life

Standard items use type K thermocouple as temperature sensor.

The small size of the heater can not use an enough thick thermocouple.

The type of the metal pipe, φ8 case is use φ0.5 wire diameter, φ13 case is use φ1.0 diameter wire.

On structure, since a temperature sensor passes along the center of a heating element, it becomes the same temperature as a heating element.

In many cases, the life of a thermo couple still does not become a problem.

 When a ABH series is used hotly, the life expectancy of the built-in temperature sensor sometimes becomes insufficient.

In such a case, please specify a built-in temperature sensor by R type (platinum system).

 The option symbol added to the model number is /+S (R).