Welcome to the world of Heat Exchanger
Together with you we develop customized heat exchangers, air coolers and fan coil units for your refrigeration requirements.
Either as standard equipment or system-specific as a system solution.
Walter Roller offers the optimal solution for every capacity range and every application in refrigeration technology with its wide range of heat exchangers and air coolers.
Future-safe air coolers
Producing and installing future-safe products is a particular challenge for manufacturers, plant engineers and operators against the background of rapidly changing market situations and legislation.
Roller air coolers today already meet the high requirements in terms of energy efficiency, use of environmentally friendly refrigerants, but also the qualitative aspects of corrosion protection and hygiene regulations.
Heat exchanger and air cooler with up to 12 mm fin spacing
If the fin spacing is too small, there is a high risk of frequent defrosting which is not very efficient.
The new Roller heat exchanger with 12mm fin spacing contributes to an increased energy efficiency of the entire system by reducing the number of necessary defrost operations.
The newly developed DHNI high-performance ceiling air cooler with two-way air discharge was specially designed for the demanding applications of industrial refrigeration and are particularly characterized by their low overall height combined with low internal volume.
Fan Coils Unit for CO2 up to 80 bar
CO2 compressor rack systems with air cooler installations in cold storage rooms are enjoying increasing popularity.
Adjacent sales rooms can now also be cooled with the same rack system.
With the proven HKN series, an A/C fan coil unit for use with CO2 is now available to cool adjoining sales, processing and office rooms.
The air conditioning unit is available with a capacity range from 1.1 to 15.6 kW and a maximum operating pressure of 60 or 80 bar, depending on the size of the unit.
By using EC motors with radial fans, the fan coil unit is not only particularly quiet and operates almost draught-free, but also contributes to the energy efficiency of the entire system.
Roller evaporator with factory installed superheat controller pre-parameterized for 40 refrigerants
Selecting and installing a suitable expansion valve for a refrigeration system is a challenge due to the many different system parameters.
Walter Roller offers a pre-installed plug-and-play solution which includes a superheat controller and el. expansion valve for its commercial refrigeration evaporators, regardless of the refrigerant used. – And that for 40 pre-parameterized refrigerants including CO2.
Energy-efficient and sustainable solution for commercial refrigeration
Regardless of the time saved in the selection of components, the advantages of an electronic expansion valve are undisputed:
precise control of the refrigerant flow, optimum charge of the evaporator, energy savings through reduced compressor running times and sliding suction pressures.
For the refrigerated goods, lower temperature differences and shorter cooling times result in increased quality.
Suitable for use in various evaporator designs
The pre-installed EVD-ice control is offered in the ceiling air cooler DLK, the cubic high-performance air cooler FHV/T and the dual discharge air cooler DHN.
These quality evaporator series are field proven in many applications and equipped with the typical Roller features (EC fan technology; highly efficient, in-line tube configuration and large heat exchanger surfaces).
They are available in a performance range from 0.5 to 15 kW.
- Roller evaporator with factory installed superheat controller pre-parameterized for 40 refrigerants
- Energy-efficient and sustainable solution for commercial refrigeration
- Suitable for use in various evaporator designs