Welvent Ltd

Refrigeration Unit


The Welvent packaged combined ambient/refrigeration ventilation unit has a simple, yet technically innovative layout for a relatively low capital cost. The system has evolved over the last twenty years into a very efficient, reliable, and up to date way of doing the job. The units are economical to run, high humidity systems. The packaged approach means that the pipework and electrical equipment are contained within the system, so minimising wear and tear and the risk of damage.

  • Low Weight Loss
  • Highly Efficient and Economical
  • Packaged Portable System
  • Fans on air on side for high off Coil RH
  • Danfoss Electronic TEV
  • Defrost on Demand
  • Quality Components
  • Invertor Drives

simple controls

The series 3000 range of controls offer a total system control, optimising all the refrigeration system variables, to meet the requirements of the crop. The system has, however, been designed to be user friendly with a touch membrane pad for easy operation, and a large screen to provide all the information you need.

The tonnages indicated are for potatoes and are for guide purposes only as there are many factors to consider - Insulation, Building Size, Variety, etc. Welvent will advise on the correct machine for the duty.

The machines are available in single phase up to 12kw,(150ton) and in packaged format up to 150kw. All machines over 90kw are available with an option on the number of compressors in the system.

efficient and rapid reacting cooling systems

Large Evaporators combined with the use of the latest Danfoss electronic expansion valve technology, and the positioning of the fan at the air on side of the coil, ensure the minimum moisture loss. This in turn provides high store relative humidity and the lowest possible moisture loss from the crop.

total control systems

The total refrigeration control system constantly monitors the temperature to provide control of the air blowing the crop. This ensures that temperatures within the store are even, and that the system is safe for use with processing crops.

defrost on demand

Electric defrost systems combined with a true 'defrost on demand' control ensure the system is suitable for operating down to the lowest storage temperatures.(even below 0 degrees(c). However in normal storage situations it is possible that the system will never defrost, reducing running costs, and helping preserve the quality of the crop.

inverter drives

The incorporation of inverter drives into the system for control of the speed of the compressor is the biggest step forward in the potato store package since the incorporation of the Danfoss electronic expansion valves over 1.5 years ago. The system allows for accurate economical control of the refrigeration output under part hood conditions. The control is integrated with the series 3000 control system and the speed is proportional to the duct temperature difference setting.

head pressure control

The incorporation of fan speed control onto the condenser fan can provide a constant head pressure control. This increases the efficiency and reduces the costs of the refrigeration system, and is available as an option on any Welvent refrigeration system.

Welvent Offer

  • A tailor made total package - making the system easy to move, or potentially portable
  • Top of the range Microprocessor controls
  • High specification evaporator and expansion valves creating high humidity which results in low moisture loss
  • Combined ambient ventilation system - optional
  • Quality and experienced service and support team

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