1Composition of models and their representative significance

The product model and its meaning are as follows:

IIPurpose and Applicable Environment

roof fanMain applicationsExisting or potentially existingⅡA～ⅡCClass,T1～T4Explosive hazard field formed by mixing combustible gases, vapors, and airreach21、22District,T1～T4Hazardous field formed by combustible dust and air in the groupplaceUsed for ventilation or enhancing heat dissipation.

1.1 Usage environment

The roof fan should operate reliably under the following conditions:

00001——atmospheric pressure80kPa～110kPa；

00002——Ambient temperature-20℃～+40℃；

00003——The relative humidity of the surrounding air is not greater than95% (at 25 ℃);

00004——existExplosion hazardous areas formed by the mixture of combustible gases, vapors, and air in groups IIA-IIC and T1-T4, as well as environments where explosive gas mixtures occur or may occur, and hazardous areas formed by combustible dust and air in groups T1-T4 in zones 21 and 22;

00005——A place without severe vibration and impact.

IIIProduct parameters