Next-Generation Split-Case Pumps for Water Applications

KSB has launched the Omega 2, a new generation of axially split volute casing pumps designed for water and low-solids fluids, targeting energy efficiency, high reliability and simplified maintenance across utility and industrial applications.

Application scope and operating environments
The Omega 2 pump series is designed for handling clean water and fluids with a low solids content. Typical applications include waterworks, district heating and cooling networks, desalination plants and a range of industrial processes. These environments place high demands on hydraulic efficiency, operating reliability and lifecycle cost, particularly in continuous-duty installations.

Split-case pump designs are commonly selected for such duties due to their accessibility, stable hydraulic performance and suitability for high flow rates.

Hydraulic optimisation and energy efficiency
KSB has introduced structural modifications to the Omega 2 series to improve hydraulic performance. An optimised hydraulic system increases overall pump efficiency, reducing the energy input required for a given duty point. Lower energy consumption directly affects operating costs in applications such as municipal water supply and district energy systems, where pumps often run continuously.

The improved hydraulic design also supports stable performance across a broad operating range, helping operators maintain efficiency under varying load conditions.

Mechanical design and reliability
The Omega 2 incorporates double-entry impellers and double-volute casings. This configuration balances axial and radial forces acting on the rotor, reducing mechanical stress on bearings and seals. As a result, the design contributes to extended service life and consistent operation under demanding conditions.

The pump series is engineered for operation at increased rotational speeds while meeting stringent requirements for net positive suction head (NPSH), bearing life and noise emissions. These characteristics are particularly relevant in large installations where cavitation risk, acoustic limits and long maintenance intervals are critical considerations.

Serviceability and maintenance access
Service-friendliness is a key design feature of the Omega 2. A self-centring rotor and a self-positioning mechanical seal simplify alignment and reassembly during maintenance. Key components can be replaced without removing the motor or disconnecting the pump from the piping system, reducing downtime and maintenance effort.

This approach supports faster servicing and lower lifecycle costs, especially in installations where pump availability is essential for system operation.

Materials and configuration options
The Omega 2 series is available in several material variants to suit different water qualities and operating environments. Options include nodular cast iron, stainless steel and duplex materials. This material flexibility allows the pumps to be adapted for applications ranging from standard water transport to more corrosive environments such as desalination processes.

Implications for water and energy infrastructure
With improved efficiency, balanced mechanical design and enhanced serviceability, the Omega 2 series addresses key requirements in modern water and energy infrastructure. The combination of lower energy consumption, high operating reliability and reduced maintenance complexity positions the pump series for long-term use in critical supply systems where efficiency and availability are central performance criteria.