Hydraulic Analysis have undertaken thousands of steady and unsteady flow studies of sewage pumping mains since 1969. A typical study will normally address the following issues:
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Calculation of systems characteristics for different operating conditions, including variation in sump levels and pipeline roughness condition.
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Pump selection to confirm chosen units are capable of achieving duty flowrate for all operating conditions.
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Confirmation that surge pressures remain within pipeline rating or, if necessary, calibrate a suitable method of surge suppression.
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Air valve sizing and selection.
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Pump non-return valve selection.
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Septicity / sedimentation calculations based upon achievable self cleansing velocity in any drained pipe sections.
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Optimisation of sump levels to prevent pumps de-watering or to ensure adequate self cleansing on a regular basis.
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Pump NPSH calculations.
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Pipe diameter and pipe gradient optimisation for drained sections.
