Mixed Flow Fans – QEI-L / QEI / QEID

Before shipment, all Greenheck mixed flow fans are tested at the design speed after final assembly. QEI-L fans are checked for amp draw and the levels are recorded. QEI-I/II and QEID fans are subjected to a complete vibration analysis. The maximum allowable vibration on a QEI-I/II at the fan bearings is 0.15 in/sec. peak velocity for the specified RPM. QEID maximum vibration is 0.08 in/sec. peak velocity on the fan housing for the specified RPM. A record of the vibration test result is available upon request. By performing the vibration test, we are able to provide more than wheel balancing, it is also a diagnostic tool for finding potential problems. A defective bearing or motor, bent shaft or misaligned sheaves may cause excessive vibration. A complete vibration test will uncover these problems before the fan leaves the factory.

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Mixed Flow Fans – QEI-L / QEI / QEID

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Mixed flow inline fans can be used for supply, exhaust, or return air installations. Our patented design excels in commercial applications where low sound is critical. In addition, Greenheck’s mixed flow fans are more efficient than comparably sized tubular centrifugal and vane axial fans, thus reducing the required motor horsepower and lowering operating costs.
• Performance as cataloged is assured. All sizes are licensed to bear the AMCA Certified Sound (both inlet and outlet) and Air Performance Seal.
• All sizes are tested before they leave the factory to ensure trouble-free operation at the jobsite.
• Compact size and a “Universal Mounting System” make tight space considerations and last minute mounting changes easy to handle at the jobsite.
• The belt drive models use air handling quality bearings that are 100% inspected for swivel torque, noise levels, and bore tolerances.
• These products are subjected to extensive life cycle testing, assuring many years of reliable performance.

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