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Home > DC Backward

DC Backward

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About DC Backward

DC backward curved centrifugal fans represent the most energy-efficient fan technology available for medium and high-static-pressure applications. Impeller blades are curved opposite to the direction of rotation, resulting in aerodynamic profiles that typically achieve 70-85 percent efficiency — significantly higher than forward curved alternatives. When combined with EC (Electronically Commutated) DC motor technology, these fans deliver industry-leading performance with variable speed capability. DC backward curved centrifugal fans are used in high-demand applications including data center cooling systems (direct expansion air handlers with deep filter banks), clean room ventilation with HEPA filtration, industrial dust collection systems requiring high pressure, and high-performance HVAC systems. Key specification parameters include impeller diameter, airflow rate, static pressure capability, efficiency class, and noise level. Leading manufacturers of DC backward curved centrifugal fans include ebm-papst (A series EC backward curved), ZIEHL-ABEGG (ZAplus EC series), and Rosenberg (EC backward curved range). Hengrui supplies the full product range with engineering support for system design and performance verification.

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Bag packaging indicates that a specified quantity of product is packaged by the manufacturer in a bag, sealed pouch, or similar container and sold as a unit without repackaging. It is also used to describe kits/assortments where components are packaged in separate bags according to part number or parametric value, rather than in a compartmentalized box or similar rigid container.

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