Cavity pump on agricultural effluent duty

A single progressing cavity pump from NOV Mono has been used to replace a number of centrifugal pumps and improve pumping performance on an agricultural effluent duty in New Zealand. The pump is now transferring animal effluent over considerable distances at Castle Glen Farms in Foxton, on New Zealand’s North Island.

The farms had previously been using a number of different centrifugal pumps to deliver pig, cow and sheep effluent through a 4″ diameter pipe over a distance of 3.7 km so that it could be used for irrigation. The pumps were replaced by a Mono Epsilon E1AD, operating at 12 bar and 120 RPM, delivering 35 m³ of effluent each hour. Epsilon pumps are suitable for this type of application and are designed to allow the use of small-bore pipework when pumping over long distances or with high head requirements.

“Replacing these with a single Mono pump has allowed us to supply several irrigators which are located over the length of the pipework, and still deliver the same pressure and flow rate at every nozzle, while also reducing our energy costs,” said Castle Glen’s Rob Mather. “We were also able to use our existing power supply and not have to upgrade the transformer to cope with a different power requirement.”

The pumps feature Mono’s Flexishaft drive shaft connection, which eliminates wearing components between the drive end and the pumping element. As no lubrication is required, the likelihood of product contamination is eliminated. A low running speed capability reduces wear rates and extends both the pumps’ maintenance intervals and overall working life. Available in cast iron or stainless steel, the pumps offer a choice of rotor and stator materials which further extend their versatility.

The pumps can be used for many different types of duty, including domestic, industrial and agricultural effluents, industrial chemicals and detergents, mine dewatering, crude oil and starch slurries. Their smooth progressing cavity action also makes them suitable for handling shear-sensitive substances such as emulsions. They are backed by Mono’s customer support services, which ensure that each user receives the most appropriate solution for their needs.