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zenit Lake Hayes lifting station for 560 housing units

Lake Hayes lifting station for 560 housing units

Situation

Located in Central Otago, New Zealand the Lake Hayes subdivision collects raw sewerage from approximately 560 homes and pumps the sewage 2.4km through a 150mm diameter main to the Shotover treatment station. Duty point was 28L/sec at 75m head.
The site fell within the Queenstown Lakes District Council territory and site maintenance was sub contracted to Fulton Hogan.

 

zenit Lake Hayes lifting station for 560 housing units

 

The existing pump station contained a dual pump set operating duty/standby. The pumps were prone to ragging and were being removed every 1-2 days for deragging that entailed a 15km trip to the workshop for a wet end strip and clean.

Solution

Using the ZENIT Pump selector software a set of ZENIT Uniqa ZUG OC 100F 45kW 2 pole pumps were selected to meet the required duty point
A key criteria for choosing the Uniqa open channel wet end was the promise that the ZENIT Anti-Clogging System (ACS) was superior to other systems on the market and would offer the Council and subcontractor ongoing savings in site maintenance costs.

zenit Lake Hayes lifting station for 560 housing units

 

The well thought out design of the Uniqa Wet end also meant that any maintenance on the volute and impeller can be done on-site without the need to disconnect the pump and transport back to a workshop.

ZENIT Group is represented in New Zealand by White International NZ Ltd. Working closely with Hall Machinery, a distributor for Whites, the two pumps along with a set of DAC 100/100V mounting guide rails were supplied in early 2015. The pump set was installed and commission in July 2015 by Fulton Hogan after completing site works to prepare the chamber for the new pumps and guiderail system.

 

ZENIT Uniqa ZUG OC 100F 45kW

 

Benefits

Since their installation, the pumps have worked faultlessly. Fulton Hogan have not had to pull either pump from the pumping station for any deragging issues or unplanned repairs.
The site maintenance cost savings per year equate to over NZ$30,000.

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zenit Lake Hayes lifting station for 560 housing unitszenit Lake Hayes lifting station for 560 housing units