Flow rate, pressure, density.

Flow rate, pressure, density.Density is a critical factor in the selection process. If density is not specified, it must be calculated or converted based on the operating conditions of the explosion-proof centrifugal fan, such as altitude, local atmospheric pressure, operating temperature, and standard gas density. After determining these three fundamental elements, the specific speed of the explosion-proof centrifugal fan must be calculated. This calculation is a critical step in the fan selection process and serves as the primary basis for evaluating specific models. Substituting the fan's performance parameters and rotational speed (converted to standard conditions) into the specific speed formula yields different specific speeds corresponding to varying rotational speeds. The second stage involves model selection. During this process, the performance curve of the explosion-proof centrifugal fan is primarily determined by the model, categorized into dimensional and non-dimensional curves. The non-dimensional curve serves as the basis for verifying compliance with site requirements and interpreting fan characteristics. Dimensional curves represent specific properties, while non-dimensional curves denote universal properties. After determining the above factors, the third stage of selection commences. Based on the density, velocity, and model determined above, the roughly calculated quantity of explosion-proof centrifugal fans is rounded. Software is used to plot the performance curve and adjust the operating point of the explosion-proof centrifugal fan. The internal power of the fan is then calculated based on actual operating conditions.