Gardner Denver HELIFLOW 8 Series, Руководство пользователя

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HF-7-604 Page 19
PIPING
Inlet and discharge connections on all blowers are large enough to handle maximum volume with
minimum friction loss. Reducing the pipe diameter on either inlet or discharge will only create additional
line loss and increase the overall pressure differential.
Excessive weight of piping and fittings will cause internal misalignment and premature wear. Never allow
the blower to carry the weight of the pipe. If possible, a spool or sleeve-type expansion joint should be
installed between the unit and the piping. Where a flexible connection is not practical, the weight of the
rigid connection must be separately supported. All system piping must be cleaned internally before
connecting to the blower.
The suction pipe must be of a sufficient size, otherwise machine will be overloaded.
The suction pipe must incline downwards from the machine to prevent condensate from entering and
drain plug must be fitted at the lowest point. For adherence to the acceptable operating vacuum, the
vacuum gauge should be installed in the suction pipe directly in front of the suction port.
Vacuum relief valve is absolutely essential. Relief valve should be installed as close as possible to the
inlet port of the blower.