Need to know the performance of the selected centrifugal fan: 1. The engineering design and use unit selects the type of centrifugal fan according to the characteristics of the place where the centrifugal fan is used, and then determines the centrifugal fan number and required power from the performance table according to the selected flow rate and full pressure Motors can be selected. In addition to the motors specified in the performance table, other types of motors can also be selected, and be noted when ordering. 2. The performance of each speed in the performance table will be divided into 4-8 performance points according to the flow rate in the range of the maximum efficiency of 90%. 3. When the performance of the qualified products delivered by the centrifugal fan is under the given flow rate, the full pressure value does not exceed ± 5.5. 4. The parameters provided in the performance table are generally based on the gas temperature t = 20 ℃ and atmospheric pressure Pa = 760mmHg. , The gas density r = 1.2kgf / m3 (1kgf = 9.8N) is calculated for the air medium. 5. If the conditions of use do not match the above given conditions, the performance should be converted according to the following formula: Conversion formula when changing density r, speed n: Q1 / Q2 = n1 / n2 P1 / P2 = (n1 / n2) 2 · r1 / r2 N1 / N2 = (n1 / n2) 3 · r1 / r2 Conversion formula when changing the speed n, atmospheric pressure Pa, gas temperature t: P1 / P2 = (n1 / n2) 2 · (pa1 / pa2) · (273 + t2 / 273 + t2) N1 / N2 = (n1 / n2) 3 · (pa1 / pa2) · (273 + t2 / 273 + t1) In the formula: the footnote symbol "2" indicates the known performance, "1 "Indicates the required performance. 6. The required power in the performance table is: N = (PQ / 1000n × 3600n1) K In the formula: Q—flow rate (m / h) P—full pressure (Pa) n—full pressure efficiency n1—mechanical efficiency K —Motor capacity reserve factor
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Company Name Guangzhou Xinfeng Fan Co., Ltd. Contact Miss Wu Department Marketing Department Phone 400-088-0118 Fax 020-81692660 Mobile 13928867400 Email Website Address No. 1 Lianxing Road, Shilou Town, Panyu District
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Company Name Guangzhou Xinfeng Fan Co., Ltd. Contact Miss Wu Department Marketing Department Phone 400-088-0118 Fax 020-81692660 Mobile 13928867400 Email Website Address No. 1 Lianxing Road, Shilou Town, Panyu District
Corner Bathtub
Corner Bathtub
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