Victorian milk company gets engineered stormwater pump solution

Hydro Innovations supplied an engineered solution to a Victorian milk
company that sought a stormwater pumping system for a challenging application at
their facility. The stormwater pumping system required pumping from three
separate locations back to a single point, pumping eventually through a common
discharge line.

The application was challenging because each pumping station could pump
at different times, and with varying flow rates, which meant the solution
needed to factor in aspects such as VFDs, motor sizes, pumps vying for space in
the common discharge line, and not over-performing in the event only one pump
at one station was operating in the system.

The milk company had been recommended a popular solution by other pump
companies, involving pumps with large motors to enable them to run at faster
speeds and produce the required pressure when all the pumps at all stations
needed to operate. Since the system was being set up as a duty/standby, all six
pumps were required to have large motors while power also needed to be provided
to these satellite spots to accommodate the larger motors. This option would
have increased the expense considering the need for large motors and power
cables, and the resulting high energy costs.

Hydro Innovations suggested the use of Gorman-Rupp self priming pumps in
conjunction with series/parallel piping, a special piping arrangement that
allows each pump to operate independently at each station, enabling the pumps
to alternate between cycles. However, when a single pump at any station cannot
keep pace with the inflow, the second pump starts up in series with the
running pump. This means that both pumps are working together to overcome
friction losses in the discharge line instead of against each other. This
enabled the use of much smaller motors and smaller power cables, reducing the
overall costs.

The self priming pump system was duly installed, with Hydro Innovations
designing and building the pump systems with their special piping and valve
arrangements. The milk company has not only saved money on the installation but
is also enjoying ongoing energy cost savings in their operations.

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