Because there is no contact between the rotors and the case, there is no wear and no
lubrication is required. (Oil/Grease is required to lubricate the bearings and gear). The lack of
contact means that some leakage occurs and the rate is directly related to the pressure
differential between ports. As the pressure differential increases, the leakage rate increases.
Furthermore, as the leakage rate increases the adiabatic efficiency decreases, increasing the
discharge temperature and power requirement.
The net flow rate and efficiency is then dependent upon the shaft speed, volume flow per
revolution, and leakage rate at the operational pressure point.
8.2 Construction
As described in operating characteristics 8.1, each blower is constructed for a specific
volume flow rate per revolution and is defined by design and rotor length. The ZZ Series
offers (8) eight models to choose from. Each model offers a variety of flow rates by changing
the rotational speed.
To maximize efficiency, materials and clearances are chosen to maintain minimal
clearance but reliable operation up to a limiting pressure differential, due to thermal overload.
Thermal overload is a point at which the blower cannot dissipate enough heat (thermal energy)
to maintain design clearances due to thermal expansion and deformation.
The drive shaft, located on only one rotor, can be driven in both directions and is suitable
for direct or belt driven. Directly coupling the motor to the driveshaft allows for maximum
power transmission.
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Phone: 704-545-3922 Pg. 18
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means without permission from
Sunco Blowers
The integrated feet allow for a universal installation: in both vertical and horizontal
configurations the blower can be mounted from any side, top or bottom.
