Coffee roasters

"MI" range: Dual production of natural and roasted coffee

mi range

MI Range: Roasting capacity of 420–1,700 kg coffee per hour

A specialised range of roasters for natural coffee and torrefacto, a process where the green coffee bean is roasted with sugar, and sometimes other additives. No sugar or additives are used in the production of natural coffee.
Coffee is roasted in a drum with swinging motion and unperforated sides to ensure effective air flow and airtightness during product processing. The roaster components and drum are manufactured from food grade stainless steel.
TTA Series/MI range roasters are equipped with two independent coolers: one for natural coffee and the other for torrefacto.
Roasting capacity of 420–1,700 kg coffee per hour.
TTA Series/MI roasters can operate at half or full nominal load, at the same roasting temperature and producing the same roast profile. To achieve this, the PLC allows unlimited roast profiles that are automatically adjusted so they can be replicated exactly from one cycle to the next.
Heat is mainly transmitted by convection during operating stages where no sugar is present, and by conduction when sugar is added.
TTA Series/MI equipment operates at sugar levels of up to 33% in standard configuration.

  • Capacity of 140–500 kg coffee per cycle. Single roasting drum.
  • 420–1,700 kg torrefacto coffee roasted per hour
  • Furnace with electronic progressive gas or diesel burner; low emissions
  • Cylinder cooler with chaff-removing agitator paddles
  • Circular cooler for torrefacto coffee
  • Chaff collector
  • PLC control panel and SIEMENS/AB colour touch screen
  • Smoke afterburner with or without catalyst

Capacidad por tostado
Tiempo por ciclo
TTA-140 / MI70-140 Kg por ciclo15 - 35 minutos
TTA-240 / MI120-240 Kg por ciclo15 - 35 minutos
TTA-400 / MI200-400 Kg por ciclo15 - 35 minutos
TTA-560 / MI280-560 Kg por ciclo15 - 35 minutos


La gama TTA Series / MI está pensada para el tueste de café “torrefacto” y también de café natural, con varios porcentajes de azúcar añadido, y la posibilidad de añadir otros aditivos.

Roast time in TTA Series/MI range roasters is 15–35 minutes. Short roast times accentuate acidity in the coffee bean, and longer roasts promote body. The level of sugar added affects roast time: higher levels of added sugar require a longer roast. All roasters in the range can operate at half or full nominal load, and the PLC adjusts times and temperatures for a consistent roast profile.

  • Homogeneous colour thanks to the method of heating the coffee bean, which is mainly convection (heat transfer from hot air) with some conduction (heat transfer from the roasting drum)
  • Carbon steel or food grade stainless steel roasting drum with a variety of mixing paddles available in customised materials. Coffee moved evenly and carefully in the roasting drum to prevent damage to the bean. The roasting drum is hemispherical, which keeps all the ingredients that make up the torrefacto coffee inside the drum. Product is transferred into the cooler by tilting the drum towards the cooler.
  • The door in the roasting drum can be opened at any stage of the roasting process to add ingredients and verify the production process.
  • Degrees of roast, from light to dark, with the same capacity per cycle.
  • Degrees of roast, from light to dark, with the same capacity per cycle
  • Practically negligible weight loss, which can be compensated by the quenching system at the end of the roasting process
  • Rapid and careful cooling to prevent damage to the coffee bean Coolers for both natural and torrefacto coffee are manufactured from stainless steel.
  • Roasting and cooling cycles are synchronised and occur simultaneously
  • Roasters are equipped with solid particle evacuation cyclones for the coffee cooler, hot air recirculation, electronic burners, and smoke afterburners with catalysts, for both the roaster and the cooler


The TTA SERIES/MI range is the best solution for mixed batches of torrefacto coffee. The design, development and manufacture of the TTA SERIES/MI range meet the most stringent robustness and reliability standards. They are the best solution when a single roaster is required for any type of coffee available on the market, providing practical and extremely functional solutions.
All components of the TTA SERIES/MI range are controlled by PLC, with SIEMENS or ROCKWELL HMI and local area or internet PC SCADA for remote access. Comprehensive user interface which is programmable, remotely accessible and customisable at all times
There is no limit to the number of recipes that can be stored by the control system, so the roasting process can be adapted to the various roasting profiles required by the production program
TTA SERIES/MI range software includes a product traceability system, which enables batch numbers and process quality to be managed.
Temperature curves and process parameters are visualised and stored in each roasting cycle


Los equipos garantizan el grado máximo de rendimiento y seguridad en su funcionamiento.

  • Compliance with local safety regulations related to the machinery, products and staff operating the roaster Potential to update parameters in response to new regulations in the future
  • Maintenance and repair protocol. Immediate availability of standard parts that affect machine safety. Maintenance time minimised Maintenance time minimised Downtime for maintenance: 30 minutes every 24-hour period of continuous operation.
  • Quick and easy access to clean the roaster and replace worn parts.
  • Temperature and air pressure sensors installed in roaster heat sources and air ducts, to control roaster heat balance and prevent overheating and heat venting.
  • Automated fire prevention systems, water injectors and burner operation monitoring.
  • Energy-saving devices including hot air recirculation, use of renewable energy sources, low-emission mixed electronic burners, catalysts and cleaning procedures using closed-loop water systems