Mechanical Vapor Recompression Evaporators

As a result of low operational costs due to minimal electrical energy consumption, mechanical vapor recompression (MVR) technology evaporators allow the treatment of high flow rates of wastewater with a return on investment that can often be measured in months. The MVR units contain no refrigeration circuit; they utilize the heat of compression added by a rotary lobe type compressor to superheat the wastewater vapor, then transfer that heat through an exchanger to boil the incoming wastewater.

  • Vacuum Evaporation Conditions: 60-70 kPa (8.7 – 10.2 PSI)
  • Low Boiling Temperatures: 80 – 90 °C (176 – 194 °F)
  • Low Electrical Energy Consumption (compressor, recirculating pumps):
    30-50 kWh/ton of distillate (0.11 – 0.19 kWh/gal)
  • Designed to treat large wastewater flow rates with low energy consumption

The MVR units are available in three series, using two different heat transfer technologies:

TC Series and RV F Series

TC series and the new generation RV F Series: Mechanical vapor recompression evaporators with forced circulation and external shell & tube heat exchanger

  • Electrical energy consumption: 30 – 50 kWh/ton of distillate (0.11 – 0.19 kWh/gal)
  • Capacities range from 10,000 – 120,000L (2,600 – 31,700 gal) of distillate production per day
  • Designed for high flow rates with minimum electrical energy consumption

The TC series evaporator is based on the mechanical vapor recompression technology, and uses forced circulation through an external shell & tube heat exchanger to evaporate the wastewater in the boiler. The forced circulation of the wastewater reduces scaling, deposits, and fouling on the heat exchange surfaces.


The RV F series evaporator is an evolution of the TC series and improves upon the existing technology to increase distillate quality, reduce energy consumption, reduce footprint, and add updated controls and automated cleaning.

R V Series

Mechanical Vapor Recompression evaporators with forced circulation and falling film heat exchanger

The R V series evaporator is based on the mechanical vapor recompression technology, but uses a forced circulation, falling film heat transfer device to evaporate the wastewater in the boiler.

Due to the low temperature differences between the heat exchanger and boiling wastewater, the falling film technology allows for the successful treatment of wastewaters containing highly corrosive (acidic or alkaline) contaminants or heat-sensitive products to be recycled.

  • Electrical energy consumption: 30 kWh/ton of distillate (0.11 kWh/gal)
  • Capacities range from 100,000 – 200,000L (26,400 – 52,800 gal) of distillate production per day
  • Designed for high flow rates and treatment of wastewater with heat sensitive contaminants