Classification Criteria for Air Duct Pressure Levels

1. Classification criteria for air duct pressure levels

Air ducts are classified into pressure levels based on three aspects: positive pressure, negative pressure, and pressure resistance. Its pressure level is divided into the following five levels:

1)Lightweight: Positive pressure 1000Pa, negative pressure -1000Pa, can withstand 3000Pa internal pressure and 700Pa lateral wind pressure.

2)Medium size: Positive pressure 2500Pa, negative pressure -2500Pa, can withstand 5000Pa internal pressure and 700Pa side wind pressure.

3)Heavy duty: Positive pressure of 5000Pa, negative pressure of -5000Pa, capable of withstanding internal pressure of 10000Pa and lateral wind pressure of 1000Pa.

4)Ultra heavy: Positive pressure of 10000Pa, negative pressure of 10000Pa, capable of withstanding internal pressure of 20000Pa and lateral wind pressure of 1000Pa.

5)Extra heavy type: positive pressure 15000Pa, negative pressure -15000Pa, can withstand internal pressure of 30000Pa and lateral wind pressure of 1000Pa.

2. Parameters corresponding to different pressure levels

The following table lists the maximum positive pressure, negative pressure, and pressure resistance parameters corresponding to different pressure levels.

3. Precautions for use

1)The classification criteria for air duct pressure levels should be selected based on specific scenarios and usage needs.

2)The wind pressure, weight, and installation method of large air supply and exhaust pipes in buildings should comply with relevant standards and specifications.

3)The selection of air duct accessories should match their pressure rating.

4)When installing air ducts, it is necessary to strictly follow relevant rules and regulations to ensure their quality and safety.

[Conclusion] This article introduces the standards for dividing the pressure levels of air ducts, including the maximum positive pressure, negative pressure, pressure resistance performance and other parameters corresponding to different pressure levels, and provides a detailed list and explanation in the form of a table. When using air ducts, corresponding pressure levels should be selected according to specific needs, and installation should be strictly carried out in accordance with regulations to ensure their quality and safety.