Valves, Actuators & Pump Control


Ultra-durable stainless steel submersible pumps

October 2025 Valves, Actuators & Pump Control


KSB Pumps and Valves has launched a rugged stainless-steel submersible pump range designed for deep borehole use and other demanding freshwater and saline pumping applications.

The new CORAChrom pumps are a gamechanger for African conditions with all wetted components, including the diffusers being fabricated from corrosion resistant high-grade AISI 304 stainless steel or a choice of stainless steel or engineered polymer impellers, depending on the environment. This ensures the longest possible operational life even in mineral-rich or aggressive groundwater.

According to KSB Pumps and Valves area manager, Hugo du Plessis, the CORAChrom series is available in 100 mm and 150 mm multistage centrifugal variants, and is tailored to cope with the kind of variable borehole conditions and challenging water chemistry, commonly encountered in South Africa and across the continent. This includes high iron or salt content, variable water tables and unreliable electricity supply, especially in rural areas.

Unlike traditional cast iron or bronze pumps that may degrade or clog over time, the new KSB CORAChrom submersible pumps use investment-cast stainless steel for key components such as the suction housing and non-return valve. The range also features integrated intermediate bearings and a counter-thrust ring to support axial loads and extend bearing life to further enhance reliability.

The pump’s lightweight modular design allows it to be installed vertically, horizontally or inclined, which makes it adaptable to a variety of borehole and tank installations. What really makes the CORAChrom unique is its wide power compatibility. It can operate on both single and three-phase AC power and is also available in DC solar-ready options, which are especially valuable in off-grid or energy-constrained areas.

“Our CORAChrom pumps are capable of delivering flow rates of up to 200 litres per minute, with maximum heads of 638 metres at 50 Hz (2900 rpm) or 780 metres at 60 Hz

(3500 rpm). Motors are available up to 22 kW,

depending on model and application. This is tested and certified in our global manufacturing sites, where each pump undergoes rigorous hydraulic testing under ISO 9906 Grade 3B standards verifying its real-world efficiency,” says du Plessis.

The KSB CORAChrom series is already gaining traction across multiple sectors with successful deployments in:

• Borehole-based irrigation for farms and smallholdings.

• Garden and nursery watering systems.

• Domestic water supply in rural or peri-urban housing developments.

• Dewatering and groundwater management in construction and mining.

• Pressure boosting and cooling water systems in commercial and industrial buildings.

Du Plessis notes that in drought-prone areas such as the Northern Cape, Karoo and North West, where boreholes may be drilled to depths exceeding 500 metres and access to reliable electricity remaining a challenge, the solar-ready DC models have proven to be game changers.

“These pumps deliver excellent output per watt-peak (Wp), even in low-light conditions, which makes them ideal for solar applications. It’s part of KSB’s commitment to sustainable water access and long-term value for our customers,” he says.

As with all KSB products, the CORAChrom range is backed by KSB’s extensive South African sales and service network, with expert support and technical backup available through its nationwide branches and distributors.

For more information contact Annett Kriel, KSB Pumps and Valves South Africa, +27 11 876 5600, [email protected], www.ksb.com




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