Vapor Compressor Technologies

​Compressors for Mechanical Vapor Technology

Howden is the one company who offers all of the primary rotating machinery types commonly used for MVR vapor compressor applications, and thus the widest product range.

From the world renowned Roots® Rotary Blowers to industry leading ExVel® Turbo Fans, to our lines of centrifugal compressors, we have achieved an extensive depth of experience in MVR applications in numerous industries.

Rely on Howden to be your trusted advisor to help you secure the optimum MVR vapor compressor solution.

MVR products performance map

How do I choose the right vapor compressor technology?

Ask Howden. We are happy to work with you to evaluate all of the different technologies on the aspects below to help you make the most practical technology decisions to best benefit your plant's bottom line


Identify which of the many different product technologies may fit the flow and delta-T demands for the project…different technologies will come with different combinations of capital expense, operational efficiencies and cost, and product, installation, or maintenance features, and so there may be more than one technology choice and combinations of product value to your operation. Ask Howden to help you weigh and measure the differences.

Operational Cycles / Turndown

Changes in MVR process chemistry, feed, throughput, seasonal, etc. all will have significant affect on the overall efficiency and power consumption of the vapour compressor: different compressor technologies and methods of flow control will have very different energy demands and therefore operational costs across these load changes.

Fouling Potential

Howden offers a full spectrum of aftermarket services across the world to help keep your plant operational and productive, from spare parts and regular inspection / maintenance programs to full turnkey installation and rebuild services. With a presence in around 30 countries and the largest global aftermarket team in the fan and compressor industry, we have the depth and breadth to minimise your maintenance costs and downtime to maximise your uptime.


CAPEX: Each technology will have a different capital cost

OPEX: Each technology will have a different operating cost

Power Source

The energy required to drive the vapour compressor may be available as electricity from the grid, excess plant steam, fossil fuel for an engine, etc., each with different affects to capital and operational costs.

Component Technology

With each compressor technology comes different component technology, options and resulting value in lifetime and maintenance costs. Be sure to ask if the product design and components are selected for you case to simply be the lowest cost option, or the right option for your long term plant operation expectations.


Howden Mechanical Vapor Recompression

Howden understands the unique process, aerodynamic, mechanical, and operations requirements of MVR applications.


Vapor Compression Products

Roots® Rotary Lobe Blowers  (RGS-J for steam)

Roots® Rotary Lobe Blowers (RGS-J for steam)

  • Constant flow, variable pressure characteristics.
  • Higher compression ratio to deliver high delta-T at low flows.
  • Increasingly effective when pressures are below atmosphere.
  • Water injection available:
  • maintain saturation of the process steam
  • optimize the blower efficiency.
  • Proven dependability when there is potential for MVR process carry-over.
  • Excellent turndown and potential power savings with varying loads.
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ExVel Turbo Fans

ExVel® Turbo Fans

  • Budget friendly through balanced CapEx and OpEx.
  • High compression ratio (potential delta-T) with 1, 2, or 3 stage options.
  • High single stage flow capabilities.
  • High efficiency.
  • Water spray options for cleaning (CIP) or desuperheating.
  • Proven dependability when there is potential for MVR process carryover.
  • Turndown to 50% or more.
  • API 673 option
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Centrifugal Turbo Compressors

Centrifugal Turbo Compressors

  • High single stage compression ratio (potential delta-T)
  • High single stage flow capabilities
  • Highest efficiency
  • Robust, packaged Design
  • Turndown to 50% or more
  • API 617 option
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Screw  Compressors

Screw Compressors

  • High Single Stage compression ratio with Delta T up to 30 Deg C with no additional condensate injection
  • Increased Single Stage compression ratio with Delta T up to 45 Deg C with inlet condensate injection
  • Compressor Design available to API619
  • Optimised pressure ratios available
  • Excellent range of turndown duties
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If you would like to submit an enquiry please get in touch.