Choose a suitable ventilator. When the motor power of the industrial vacuum cleaner is less than 75kW, the ventilator of the industrial vacuum cleaner does not need to be equipped with a starting valve. However, if it is a high-temperature gas and a centrifugal boiler induced draft fan must be used, a starting valve should be installed. There are many classifications of industrial vacuum cleaner ventilators. Due to differences in functions, principles, pressures, production materials and application ranges, when choosing an industrial vacuum cleaner ventilator, you need to choose a suitable industrial vacuum cleaner ventilator according to the different environments. Pay attention to the following points when purchasing a ventilator: 1. First understand the types, specifications and product features of industrial vacuum cleaner ventilators, as well as the quality of industrial vacuum cleaners and the manufacturer's subsequent services. 2. Select the corresponding industrial vacuum cleaner ventilator according to the different properties of gases in the production environment. For high-temperature places or high-temperature gases, a high-temperature ventilator should be selected. For corrosive gases, an anti-corrosion ventilator should be selected. For gases containing pulverized coal, a corresponding pulverized coal ventilator should be selected. For gases with the possibility of explosion and flammability, an explosion-proof ventilator should be selected. 3. Avoid using the ventilators of industrial vacuum cleaners to work in parallel or in series. If you have to use ventilators to work together, you must choose ventilators of the same model, specification and batch to be connected in parallel or in series. It should be noted here that when the ventilators work in series, there must be a pipeline connection between the first-stage and second-stage ventilators. 4. It is necessary to choose a low-noise industrial vacuum cleaner ventilator, usually a ventilator with high efficiency and low impeller circumferential speed. At the same time, some corresponding noise reduction measures should be taken, such as equipped with special silencer equipment, using shock absorbers, spring shock absorbers or rubber shock absorbers to prevent frictional vibrations of the fan and motor. 5. If you want to replace the ventilator of an industrial vacuum cleaner or dust removal equipment, you must first consider the size and safe operation of the original ventilator and make full use of it. Consider the previous operation conditions and existing problems of the ventilator to comprehensively judge the model parameters of the ventilator to avoid that the selected flow rate and pressure cannot meet the needs of actual work. 6. After determining the model of the ventilator according to the different properties of the working environment, choose the one with high efficiency, small size and large adjustment range among the same products. Also consider the modification of the fan characteristics by local air pressure and medium temperature. 7. When the motor power of the industrial vacuum cleaner is less than 75kW, the ventilator does not need to be equipped with a starting valve. However, if a centrifugal boiler induced draft fan is used for high-temperature gas, a starting valve should be installed.