Greenheck Fan QEI-L Value Added Features, Quality Assurance Test, Electrostatic Powder Coatings

Value Added Features

Quality Assurance Test

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.

Electrostatic Powder Coatings

Powder coatings offer a uniform, durable and high-quality finish. Standard powder coating is a one-coat process applied over

a phosphatized surface that generally meets or exceeds the corrosion resistance of a comparable wet paint.

Greenheck offers a number of in-house coatings applied via “electrostatic powder.” The standard coating, Permatector™, is excellent for indoor or outdoor applications and is resistance to many common chemicals. Consult Greenheck’s Product Application Guide, Performance Coatings for Ventilation Products, for a complete listing of coatings and a relative

resistance chart. For corrosive environments (i.e. coastal), see page 9 for information on our zinc-rich basecoat technology.

Maintenance / Serviceable Construction Advantages

The following value added features are incorporated into the design to allow for quick and easy field service.

QEI-L and QEI service advantages:

•Bearing lubrication is performed through extended grease fittings located on the outside of the fan housing.

•The entire shaft and bearing assembly can be removed as a single assembly from the inlet end of the fan housing.

•An adjustable motor base is provided for tightening the fan belts.

QEID service advantages:

•Extended lubrication lines are provided for motor bearing requiring lubrication. Smaller frame motors use sealed bearings and are permanently lubricated.

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