Corrosive pumping is easy with Gorman-Rupp Pumps

Pumping wastewater is a tough job, but when it is corrosive, pumps often have short life cycles and can become expensive to maintain.

Gorman-Rupp’s self-priming Super T Series pumps are excellent wastewater pumps, being easy to access and maintain, and able to handle solid particles including stringy materials such as rags, but they are also available in CD4MCu. CD4MCu is a Duplex Stainless Steel that is more corrosion resistant than 316ss and is up to 50% harder, making it the ideal material for pumping corrosive solids laden wastewater.

Pumps are able to be mounted up to 7.6  metres above the wastewater, so pumps are “high and dry”, making them easier and safer to access. There are no cranes or confined spaces access required, clearances are adjusted in minutes and repairs can be carried out by relatively untrained personnel.

Coating pumps is OK until the “cracks” appear

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Pumping Aggressive Wastewater

Pumping aggressive wastewater is a tough job for pumps, but Hydro Innovations  have the answer with their Gorman-Rupp self priming pumps. Pumps are available with flows from 5 litres per second through to 250 litres per second, with heads to 95 metres.

Wastewater can be abrasive, it can also be corrosive, and it can be abrasive and corrosive. These types of applications are often tackled in the industry by using internal pump coatings. These are generally fine for a short period, and may extend pump life a little, but solid particles suspended in the wastewater can damage a coating and expose the base metal [usually cast iron] to the corrosive wastewater.

Hydro Innovations will generally solve these types of application by selecting the correct materials of construction in the pump itself, because Gorman-Rupp pumps are available with a good selection of cast materials to choose from.

Abrasive applications can be handled with Gorman-Rupp’s “Hard Iron”, which has a Brinell hardness of approximately 400, making it twice as hard as regular cast iron. Depending on the application, this can extend the life of pump parts by up to 6 times.

Corrosive applications can be handled with the use of 316 stainless steel components.

If an application is abrasive and corrosive, Gorman-Rupp pumps can be supplied in CD4MCu, which is a duplex stainless steel. It is more corrosion resistant than 316 stainless steel. And it is almost twice as hard as stainless steel. This material has been used to great effect pumping brine solutions, seawater, acidic wastewater at power stations, and even pumping grit at sewage treatment plants.

Internally coating a pump can slow down erosion to pumps, but selecting the right materials of construction can result in a pump lasting many times longer than one supplied in “standard” materials.