Selection issues for low-negative-pressure fans
Thread Content
I would like to ask fellow netizens: the flow rate of this fan is 4000 m³/h, the inlet pressure is -15 kPa (15 kilopascals negative), and it is an exhaust fan. 1. Are there fans with such low pressure? Can the selected centrifugal fan meet the requirements? 2. If the pressure at the fan outlet is 0, can the total pressure be considered as +15 kPa? Can the fan be selected based on a flow rate of 4000 cubic meters and a pressure of +15 kPa?
1: A high-pressure centrifugal fan can meet the -15000 Pa performance requirement at the desired flow rate! 2: The selection can be made according to this guide; of course, a safety factor should be added for static pressure! Mr. Gong, Shanghai General Fan Co., Ltd., 13472709938, November 1, 2022
At a flow rate of 4000 m³/h and total pressure of 15 kPa, a centrifugal fan can be selected. However, attention must be paid to the shell’s sealing performance. The shell should be one without split surfaces; if split surfaces are present, gaskets must be used. Additionally, all welds must be continuously welded on both sides