The air duct classification is higher than 1500PA, which is high-pressure air duct 1500PA. Why is it considered as high pressure?

Don't worry, the so-called profession has specialization. Your question is very good.

1 The air duct fan has low pressure and is suitable for large flow and low pressure. It also consumes relatively little work. 1500pa For the low-pressure fan, the pressure has basically reached the limit. So it was called high pressure.

If the pressure is higher, you have to use roots blower, but this pressure generally does not exceed 1 kgf/cm 2.

3. The higher the pressure, the greater the flow rate. Axial flow fans and centrifugal fans should be adopted. It can achieve nearly 100 kilograms of pressure and hundreds of thousands of airflow.

4. So, no matter high or low, it depends on the interval. For example, primary school, grade five or six, the teacher said, is the third year of high school. I'm in college, a freshman, the teacher said, a junior. That's the truth.