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Flowserve - Flowserve - EnergyRecoveryDevice - DWEER

Energy Recovery Device - DWEER

BRAND: Flowserve

The Calder DWEER work exchanger is the most efficient energy recovery device (ERD) ever developed. It can recover up to 98% of the energy in the brine waste stream, which is then used to pressurize raw water and reduce the energy input for the high-pressure feed pumps up to 60%. With the DWEER, the high-pressure pump does not have to be connected to the energy recovery device. This permits the use of fewer, but larger, more efficient pumps.


  • Water

industry sectors

  • Desalination
Operating Parameters
  • Brine flows to 350 m3/h (1.4 mgd); greater flows can be achieved by placing multiple DWEER units in parallel
  • Pressures to 75 bar (1090 ft)
Design Range

Size Range: 160 m3/h - 350 m3/h

Features & Benefits
  • The most efficient energy recovery technology available today.
  • No other technology achieves higher efficiency or lower plant operating costs.
  • Its unmatched operational flexibility, specifically its wide operating range and tolerance of foreign objects, translates into extremely high availability and reliability.
  • Wide operating range enables plants to easily accommodate normal fluctuations in demand.
  • LinX™ valve offers precise control of the energy transfer mechanism as well as the operating speed of the system.
  • Materials and clearances can pass objects up to 30 microns without incurring damage, so special flushing procedures, strainers or filtration systems are not needed.
  • Quiet operation – less than 83 decibels – means noise hoods or enclosures are not needed.
  • Its installation versatility, basic header requirements and lack of extra equipment such as noise enclosures, strainers and filters greatly simplify plant construction.
  • Extremely low maintenance costs, high availability and 25-year service life contribute to low total cost of ownership.


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