Single-Case Pumps - Axially Split - API - DVSH-RO
Product Brand
Single Case Pumps - Axially Split - API
About this product

Flowserve DVSH-RO single-stage, high-pressure membrane feed pumps are engineered to deliver high-efficiency operation and long-term reliability in heavy-duty seawater reverse osmosis (SWRO) processes. Based on the widely used DVSH ISO 13709/API 610 (BB1) pump, the DVSH-RO pump is configured to meet the specific performance demands of desalination processes. A side-by-side nozzle configuration and optimized hydraulics provide the best hydraulic fit to maximize operating efficiency and stability. Corrosion-resistant materials ensure long-term service life without degradation. The result is uncompromising reliability over a wide flow range.

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  • Double-suction impeller provides axial hydraulic thrust balance and is designed for maximum hydraulic efficiency with minimal NPSHR. It is dynamically balanced to assure vibration-free operation as per API/ISO requirements.
  • Double-volute, axially split casing design minimizes hydraulic radial forces in any condition down to the minimum flow, thereby reducing shaft deflection and increasing the life of bearings, seals and wear rings.
  • Heavy-duty shaft design ensures trouble-free performance by operating under the first critical speed. The large diameter and short bearing span minimize deflection.
  • Suction and discharge nozzles are cast in the lower casing half to permit pump disassembly without disturbing the piping.
  • Nozzles are designed to handle external forces and moments equal to or in excess of ISO 13709/API 610 specifications.
  • Renewable wear rings provide hydraulic stability and high-efficiency operation. They also ensure the thrust bearings are properly loaded. Optional laser-hardened or non-metallic wear rings are available.
  • Generously sized seal chambers ensure there is sufficient liquid around the seal faces for optimal flushing and cooling.
  • Seal chambers accept single cartridge-type mechanical seals as well as double or tandem cartridge-type designs.
  • Flows to 7,000 m³/h (30,820 gpm)
  • Heads to 600 m (1,968 ft)
  • Pressures to 100 bar (1,450 psi)
  • Temperatures to 45°C (113°F)
  • Frequency of 50 or 60 Hz; compatible with VFD applications

For extended range, please consult with our specialists. 

Sizes: DN 350 and 400 (14 and 16 in)

Pressure class: PN 90 (1,305 psi)


  • Super duplex (A890, Grade 5A; PREN ≥ 40)
  • Optional Alloy 885 (PREN ≤ 40)

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