The 4-72 (C type) fan is preferred in the field of general ventilation due to its high efficiency, quiet and reliable characteristics. It adopts cantilever belt drive and the impeller is designed with backward inclined wing blade, which is suitable for ventilation and exhaust scenes and has the characteristics of high efficiency and low noise.
● Product overview
4-72(C type) centrifugal fan is a kind of high efficiency, low noise medium and low pressure centrifugal fan, widely used in industrial, building ventilation and air conditioning system. Its design pays attention to energy saving and stability, suitable for conveying air or other non-corrosive, no obvious dust gas, the medium temperature generally does not exceed 80℃.
● Model meaning
-4: represents the pressure coefficient of the fan (the integer value after 10 times the total pressure coefficient).
-72: indicates the specific speed (speed parameters under design conditions).
● structural composition
-Impeller: 10 backward inclined wing type blades are welded between the arc-shaped wheel cover and the flat wheel disc, and dynamic balance correction is carried out to run smoothly and efficiently.
-Shell: the volute structure is welded with steel plate, and the surface is sprayed with anti-corrosion paint. The air inlet is converging streamlined to reduce air loss.
-Transmission group: support a variety of transmission modes (A type /D type /C type), standard motor direct connection or belt drive, bearing box sealing reliable.
● application area
-Ventilation of factory workshops and warehouses.
-Air conditioning and smoke exhaust systems for commercial buildings and underground garages.
-Dust removal and exhaust emission of light industry (materials should be selected according to the characteristics of media).
-Boiler blast or induced air (temperature tolerance should be noted).
● Product features
-High efficiency and energy saving: the wing type blade and streamlined design reduce vortex loss, and the efficiency is far higher than that of ordinary fans.
-Low noise: the impeller and volute structure are optimized, and the operating noise is less than 85 dB (A), which is suitable for quiet environment.
-Strong durability: the impeller has been tested by precision dynamic balance, bearing life is long, maintenance cycle is long.
-Flexible configuration: support horizontal, vertical, hoisting and other installation methods, suitable for different pipeline layout.
● Installation and selection suggestions
-Installation method: choose basic fixing, pipe connection or shock absorber installation according to the scene to ensure that there is no stress in the inlet and outlet pipelines.
-Selection points:
-Calculate the air volume and wind pressure required by the system, and select the appropriate machine number according to the performance curve.
-Stainless steel or fiberglass should be used in corrosive environments.
-High temperature conditions require temperature resistant motors or cooling devices.
● matters need attention
-Avoid long-term overload operation, check belt tension or coupling alignment regularly.
-Pre-filter is used to prevent blade wear when conveying dusty gas.
-Before the first start, manual turning should be performed to ensure that there is no blockage.
