United Pumps’ double-suction split case range combines efficiency, strength and Australian engineering for the toughest water transfer conditions.
The double-suction split case pump is the workhorse for many water transfer applications.
The machine’s compact, between-bearings design, inline configuration and low NPSH (net positive suction head) requirements make it an efficient and reliable unit across water supply, industrial, mining and irrigation applications.
Boasting a robust hydraulic design, when using double-suction or multi-stage pumps, opposing impellers enable balanced axial thrust and reduced power consumption, while low bearing loads maintain bearing temperature while increasing the service life of the unit.
The innovator behind the product
United Pumps, which has been manufacturing split case pumps in Australia for more than 40 years, intimately understands the upside to these machines.
Designed, cast, manufactured in Australia, United Pumps designs and engineers a wide range of double-suction split case pumps. This is backed by the company’s expansive testing facilities, where all pumps are put through rigorous research and development (R&D) and production testing, analysing NPSHr, power, flow, head and vibration.
The traditional horizontal split case pump is the foundation for the range, but the benefits of double-suction design is available in other configurations, also manufactured in Australia.
The double-suction vertical pump (DSVP) is a good option for low space applications.
With its back pull out, vertically-mounted design and line nozzles, the DSVP is a high-flow option to a vertically-mounted horizontal split case pump. Simper servicing and mounting reduce installation and maintenance costs.
Able alternatives
While not a double-suction pump, the two-stage Duoflo horizontal split case pump hosts two impellers operating in opposing directions to reduce axial thrust, with each impeller of these high head units adding to the discharge head.
When taken to the extreme, the horizontal multi-stage split case barrel pump offers low NPSH advantages of a double-suction pump, with the high head of a multi-stage pump. A horizontal split case cartridge is mounted in a radial split case barrel for pressure containment.
For high volume, high head applications in low NPSHa conditions, a radially split two-stage pump is ideal.
United DSTHF pumps have a double-suction first stage impeller and a single-suction second stage impeller to boost head. Between-bearings design provides rigid rotating assembly support and radial case seals support a simple high pressure case assembly.
Tailored to suit
United Pumps’ catalogue of double-suction and split case pumps is extensive and can be customised to suit existing pipe works and installation configurations.
The double-suction horizontal split case range is also available in a vertically-mounted configuration for low space applications. The range covers flow rates from 100m³/hr to 2300m³/hr and head to 160m, and for higher flow and head combinations, the DSTHF radial split case pump can produce flows to 3000m³/hr and head to 500m.
Then there’s the multi-stage DDHF, which can deliver head to 2100m, giving United a wide range of split case pumps to provide complete coverage for most service conditions.
United Pumps’ commitment to local design, manufacture and testing ensures every split case pump performs in Australia’s toughest water transfer conditions. This end-to-end expertise has made United Pumps a trusted partner across Australia’s water and industrial sectors.
For more information, visit unitedpumps.com.au
This feature appeared in the Summer 2025/26 edition of Pump Industry.
