# 1-6.Compressed Gas Supply to the Air Blow Heater

### Supply pressure

The supply pressure cannot be unequivocally determined because it is affected by the supply gas flow rate, the shape of the tip of the Air Blow Heater, the piping conditions, etc. .if the supply pressure is too small, the gas flow rate may not flow properly and the Air Blow Heater may burn out.
The withstand voltage of the Air Blow Heater is 0.3MPa for the H series and 0.4MPa for the S series. In addition, pressure resistant products can be made to order.

### Supply flow rate

The supply flow rate needs to be changed depending on the hot air temperature, the object to be heated and the purpose.
In order to stably heat the object to be heated, it is necessary to stabilize the flow rate, and it is absolutely necessary to control the flow rate value.

Example) the Air Blow Heater ABH100v-350w / 10PS supply flow rate at 500 ℃

Substitute the value in the above formula.
F (flow rate) ≒ (45 x 350W) ÷ 500 ° C = 31.5L / min

In addition, the minimum flow rate of compressed gas is calculated using the following formula as a guide.

Example) Air Blow Heater ABH100v-350w / 10PS heater with 100v added minimum flow rate
The minimum flow rate is = 0.05 × 350 w = 17.5 L / min.
When used at the lowest flow rate at the rated voltage, the heating element is used near high temperature, so the risk of burning increases. Please use at a flow rate that takes into account the safety factor.

### Precautions when using the temperature controller

If the amount of gas supplied to the Air Blow Heater is extremely small, there will be an error between the heating element temperature inside the pipe and the temperature of the temperature controller (hot air temperature/ thermocouple temperature). The temperature of the temperature controller (hot air temperature / thermocouple temperature) is displayed lower than the heating element temperature, and it burns out in a short time. The thermocouple at the hot air outlet senses the temperature of the hot air heated by the heating element. If the gas flow rate is extremely low, the hot air heated by the heating element temperature will not reach the thermocouple at the hot air outlet, resulting in an error.Check the minimum flow rate and supply the flow rate multiplied by the safety factor twice.