Operating above the indicated maximum pressure or vacuum would overload the
motor and/or overheat the unit. In addition to the maximum allowable pressure
difference, careful consideration should be given to matching the motor
protection devices (provided by others) to the expected current draw. In no case
should the blower be operated with inadequate motor overload protection.
Since regenerative blowers are dynamic compression devices, the performance
limits shown in Tables 1 to 4 are applicable only for a gas with the same specific
gravity, dynamic viscosity and chemical characteristics as air. For gases with
different physical properties than air, the limits will be different from those shown
in the tables. Please contact Airtech for assistance in determining the proper
blower size and configuration if handling gases other than air.
A vacuum relief valve or pressure relief valve should always be installed at the
suction or discharge of the regenerative blower. This will prevent operation
outside the applicable ranges shown in Tables 1 to 4. If the relief valves were
not specified in the ordering process, please contact Airtech for details, price and
availability of the needed valves before commissioning the unit. Failure to use
the proper relief valve may result in failure of the blower due to operation outside
the applicable limits; any such failure is outside the scope of Airtech’s standard
warranty.
WARNING! Be sure to install the necessary personnel protection devices if
unexpected shut-down of the unit presents danger of death or injury.
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