Your advantages	Your benefits
	Powerful pump (flow rate 85 L/min max. pressure 5.5 bar max.) Magnetic coupling Integrated frequency conversion Pressure limitation	High volume flow even in case of pressure loss No sealing problems at the pump shaft as it is hydraulically sealed Highly precise user-specific speed control (40 to 100 percent) Protection of the consumer against excess pressure
	Nitrogen overlay of the expansion vessel Pressure-resistant expansion vessel made of stainless steel	No condensation of the air humidity No odours No evaporation and no oxidation of the heat transfer liquid Enables larger operating temperature range of the heat transfer liquids
	Automatic on/off of the second refrigeration step for KHS 2190 W (cascade cooling up to -90 °C)	Up to 50 percent energy conservation in applications over -20 °C
	Protection class IP 54 Robust construction using steel frames Industrial control cabinet	Safe, reliable and long-term use in production environments Protection of the control against all environmental influences, such as dust, dirt, liquids and touch Simple maintenance and service by ideal accessibility to all components
	PLC control (programmable logic controller) 7" touch panel Detailed display of parameters Visualisation of alarm and error messages	Extensive data exchange with process control systems Intuitive operation Quick analysis of process data Identification of disturbance variables
	Use of a refrigerant with low global warming potential (GWP* < 2,500) Low amount of refrigerant	Fulfills the European F Gas Directive No. 517/2014

*GWP = Global Warming Potential

The Kryoheater Selecta series consists of the two systems KHS 3560 W and KHS 2190 W, which are used in chemical and pharmaceutical production as well as for the simulation of environmental conditions in test stands of the automobile and aerospace industries.

Advantages ensured by nitrogen overlay

A nitrogen overlay permits the insulation of the heat transfer liquid from atmospheric oxygen in pressureless operation. This prevents an oxidation at high temperatures. Thus the life of the heat transfer liquid is extended drastically on the one hand and in addition the maximum operating temperature permitted is increased. In addition, the overlay prevents the condensation of air humidity at low temperatures. The Kryoheater Selecta process thermostats have been designed for pressurised operation. By a pressurized operation with nitrogen the advantages mentioned above are reached, and in addition the boiling points of the heat transfer liquids and thus the maximum permissible operating temperatures are increased.

Interface/data protocol

• Lemo sockets for external temperature control
• USB interface to read out data and for information transmission for diagnosis or configuration
• A freely selectable analog or digital interface

Operation/control

Simple and intuitively designed user interface:

• Visualisation of heating and cooling circle, warning messages and failures
• Clear overview of the parameters - directly recognizable on the piping schematic

PLC (programmable logic controller) fitted in an industrial switch cabinet

• Comfortable and extensive interlinking with other IT systems
• High process transparency ensured by large information density in the control system
• Long-time compatible, vibration-resistant, maintenance-free and scalable
• Extremely high reliability
• Remote maintenance and remote diagnosis (update of parameter sets or software online possible)

Kryoheater Selecta Process thermostats

Heat transfer liquids

Cooling water tube EPDM

Metal hoses with cold insulation

Quick coupling

Adapter

Options

*Installation of an optional expansion vessel causes an enlargement of the housing height from 1,650 to 2,350 mm.

Application example

Cooling process of a 250 L reactor between 20 and -50 °C

• High efficiency for every temperature setpoint value by using precisely harmonised refrigerants and frequency-controlled compressors. In case of KHS 2190 W, the two frequency-controlled compressors are automatically run in single or two stage operation depending on load and temperature.
• Transport of the heat transfer liquid with the required pressure by means of the 2.2 kW magnetically coupled and frequency controlled pump in the external consumer, such as a reactor.
• Limitation of the outlet temperature; programmable temperature ramps as well as Delta T limitations to take minimum and maximum temperature loads of reactors into consideration.
• Link to the process control system by various interface options enabled by the standard Siemens PLC control