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Product Center
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Centrifugal fans with backward curved impellers feature a few large blades curved opposite the direction of rotation. Scrolls are not necessary for them to create the airflow because they gain pressure within the impeller envelope, while inlet rings are common accessories with which pressure losses and air leakage are minimized. Seemtek backward curved centrifugal fans are used in high-speed applications with good air efficiency.
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Centrifugal fans with brackets, namely plug fans, are assembled compact fan units with a centrifugal fan, an inlet cone, and a support frame, all jointed by screws. Seemtek EC plug fans are direct drive fans and easy to install, quiet and higher efficient, for which they have become popular choice in various newly manufactured equipments and retrofitting projects, like air conditioning units, refrigeration condensers and air handling units.
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Centrifugal fans with forward curved impellers are characterized by a lot of small blades curved the same direction as the rotation. Scrolls are required for them to convert the kinetic energy into static pressure. The shape of the housing also directs the airflow coming out from one direction instead of many directions. Seemtek forward curved centrifugal fans are employed in single inlet and double inlet scrolls. They are good for low-speed applications with lower noise levels.
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Blower fans are forward curved centrifugal fans employed in scrolls. There are two types of blower fans for the difference in scrolls - single inlet and double inlet. This difference also leads to diversity in performance. Single inlet blower fans feature a steep performance curve, suitable for higher pressure applications; Double inlet blower fans are characterized by high airflow with relatively smaller size, suitable for lower pressure applications.
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Axial Fans force air to move in an axial direction, parallel to the rotating motor shaft. Compared to centrifugal fans, axial fans are suitable for delivering a larger airflow at a lower static pressure. Seemtek axial fans are very compact for external rotor motor structure. Guard grilles are available for fans’ mounting and protection. Wall rings can help create a smooth laminar flow into the suction side of the fan and optimize the fan performance.
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Seemtek's centrifugal impeller is specially developed for use in air handling units (AHUs) that must meet the highest energy efficiency requirements. With impeller geometry optimized for efficiency, Seemtek's fan impellers deliver maximum performance across a wide operating range. This allows manufacturers of air conditioning units and plug fans for AHUs to significantly increase the efficiency of whole system and thereby lowering costs.
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