LT(K)_DK Series continuous-flow coolers
Cooling capacity 1 kW to 7.5 kW
Compact cooling units of the LT(K) Series as continuous-flow coolers without medium tank;
with pump option
The industrial continuous-flow coolers of the LT(K)_DK Series consist of the following components:
refrigerant circuit, medium circuit and electrical engineering – completely installed in one housing.
The cooling of the circulating medium takes place via a heat exchanger, the so-called evaporator.
The basic version is equipped ready for connection and operation, in air-cooled design for frost-free indoor installation.
Individually configurable and expandable according to customer specifications.
Recirculating media
Water 
Emulsion 
Oil
Flow temperature range
10 – 40 °C
Quality and performance features of LT(K)_DK
continuous-flow coolers
- Wide range of options due to flexible modular principle
- Individual and application-specific configuration optimised for a wide range of customer requirements, e.g. special voltages, higher ambient temperatures, multi-circuit system, interface connection, etc.
- Easy integration into the production layout due to smallest dimensions and individual colour selection
- Available as stand-alone or built-in unit
- High precision control
- Automatic power adjustment
- Standard temperature stability +/- 1 K
- Flexible control and temperature precision through ACC control possible on request
Main areas of application:
Filtration technology, food industry, plastics industry – everywhere where existing tanks or containers can heat up and require cooling or temperature control.
- Compact device tested by us in-house, in test run lasting several hours
- Compact industrial housing for indoor installation
- Device standing on wheels (LT_DK 4.5 - 6.5)
- Painted in RAL 7012
- Air-cooled condenser with copper pipes and aluminium lamellae, extremely efficient
- Axial fan, extremely low-noise and maintenance-free, with contact protection
- CFC-free coolant
- Hermetic compressor, 100 % suction gas-cooled
- Evaporator as a plate heat exchanger or optionally as pipe coil heat exchanger
- Thermostatic expansion valve for optimum coolant injection
- High and low-pressure pressure switch
- Piping of the medium circuit made from stainless material (iron-free)
- Digital controller with target and actual value display
- Switching and control elements completely wired
- Automatic power adjustment
- CE-compliant
- Refrigeration technology designed according to DIN EN 378, part 2
- Electronics designed according to DIN EN 60204
- RoHS and REACH-compliant
- Outdoor installation
- Air filer mat
- Radial fans
- Split design
- Water-cooled condenser
- Low-noise design
- Refrigeration gauge for high and low-pressure sides
- Temperature stability ± 0.2 K
- Temperature stability ± 0.02 K
- Cold fluid outlet temperature < +8 °C
- Overflow valve
- Fixed bypass
- Multi-circuit system
- Heat recovery
- Flow monitor with analog or digital signal
- Medium filter
- Gate valves in flow and return
- Medium temperatures up to 40 °C
- Heating for temperature control
- Pump made from bronze or optionally stainless steel
- Pump switch-off
- Air filter mat monitoring
- Continuously variable speed regulation of the fans
- Wire marking
- External on/off switch
- Heavy-duty connector (e. g. Harting)
- 24V AC/DC control voltage
- Special voltages and frequencies (50/60 Hz)
- Limit temperature monitoring
- Differential temperature regulation
- External temperature sensor
- Cabinet heating
- Cabinet fan
- Bus connection, e. g. Profibus DP
- Individual fault indicators (in the plain text display or as bit technology)
- RAL special colours upon request
- Mobile version (LT Mini_DK / LTK_DK)
Continuous flow cooler with optional pump for water / emulsion up to 8% and oil up to 32cSt
| Series Type | Unit | LT Mini 09.5_DK | LTK 1.4_DK | LTK 2.4_DK |
|---|---|---|---|---|
| Cooling capacity at medium inflow temp. | W | |||
| +10 °C | 800 | 1200 | 1800 | |
| +15 °C | 1000 | 1600 | 2300 | |
| +20 °C | 1050 | 1800 | 2400 | |
| Compressor drive | W | 480 | 700 | 990 |
| Number of fans | piece | 1 | 1 | 1 |
| Air capacity | m3/h | 500 | 1150 | 1150 |
| required flow rate for water | 5 | 10 | 10 | |
| required flow rate for emulsion min. 8% | l/min | 5 | 10 | 10 |
| required flow rate for oil | l/min | 10 | 20 | 20 |
| Pressure loss in flow cooler approx. | bar | 1 | 1 | 1 |
| Particle size max.* | µm | 50 | 50 | 50 |
| Water connections DN | Inch | 1/2 | 3/4 | 3/4 |
| Width (W) | mm | 443 | 650 | 650 |
| Length (L) | mm | 555 | 650 | 650 |
| Total height (H) | mm | 360 | 500 | 500 |
| Weight when empty approx. | kg | 42 | 80 | 90 |
| Series Type | Unit | LTK 3.4_DK | LT 4.5_DK |
|---|---|---|---|
| Cooling capacity at medium inflow temp. | W | ||
| +10 °C | 2200 | 3500 | |
| +15 °C | 3000 | 4200 | |
| +20 °C | 3200 | 5100 | |
| Compressor drive | W | 1090 | 940 |
| Number of fans | piece | 1 | 1 |
| Air capacity | m3/h | 1150 | 2600 |
| required flow rate for water | 10 | 20 | |
| required flow rate for emulsion min. 8% | l/min | 10 | 20 |
| required flow rate for oil | l/min | 20 | 50 |
| Pressure loss in flow cooler approx. | bar | 1 | 1 |
| Particle size max.* | µm | 50 | 50 |
| Water connections DN | Inch | 3/4 | 1 |
| Width (W) | mm | 650 | 600 |
| Length (L) | mm | 650 | 600 |
| Total height (H) | mm | 500 | 1165 |
| Weight when empty approx. | kg | 90 | 110 |
| Series Type | Unit | LT 5.5_DK | LT 6.5_DK |
|---|---|---|---|
| Cooling capacity at medium inflow temp. | W | ||
| +10 °C | 4900 | 5000 | |
| +15 °C | 6000 | 6500 | |
| +20 °C | 7200 | 7500 | |
| Compressor drive | W | 1300 | 1650 |
| Number of fans | piece | 1 | 1 |
| Air capacity | m3/h | 2600 | 2600 |
| required flow rate for water | 20 | 20 | |
| required flow rate for emulsion min. 8% | l/min | 20 | 20 |
| required flow rate for oil | l/min | 50 | 50 |
| Pressure loss in flow cooler approx. | bar | 1 | 1 |
| Particle size max.* | µm | 50 | 50 |
| Water connections DN | Inch | 1 | 1 |
| Width (W) | mm | 600 | 600 |
| Length (L) | mm | 600 | 600 |
| Total height (H) | mm | 1165 | 1165 |
| Weight when empty approx. | kg | 110 | 110 |
Medium temperature range: from +8 °C to +25 °C (other ranges on request).
Type of cooling: air-cooled with axial fan (water-cooled or with radial fan on request).
Electrical connection: LT mini_DK, LTK_DK in 230 V/50 Hz, LT_DK 4.5 - LT 6.5 in 400 V N PE 50 Hz (other voltages and frequencies on request).
Designed ambient temperature: +32 °C (higher and lower temperatures on request).
Application range of the industrial cooler: from +8 °C to + 42 °C ambient temperature (higher and lower temperatures on request).
Circulation medium: Drinking water / emulsion up to 8% / oil up to 32cSt (sulphur-free) with a spread of approx. 5 K between medium inlet and outlet (other ranges on request).
* depending on degree of pollution
Technical modifications and errors reserved.
The cold fluid circuit mainly consists of a compressor, an air-cooled condenser, expansion valve and evaporator. In accordance with the process requirements, also radial condensers (for the air duct connection), split condensers (outer/inner unit) and a water-cooled condenser version are available. We only use CFC-free coolants such as e. g. R134a and R407C. All cooling components are made by renowned brand manufacturers and guarantee reliability, long service life and global availability. The entire cold fluid circuit is designed for the optimal and most economic function of the industrial cooler and corresponds to the most recent Standards of the CE directive and of DIN EN 378, Part 2.
The entire electronics circuit is designed for the optimal function of the industrial cooler and corresponds to the most recent Standards of the CE directive and of DIN EN 60204. In all models of the LT_DK series, precise temperature control is carried out by a microprocessor-controlled digital temperature controller. All LT_DK industrial continuous flow coolers are suitable for indoor installation and can optionally also be installed outside.
The components of the medium circuit are made as standard from stainless material and completely fitted in the stable industrial housing. The complete medium circuit is fitted in the device with a complete pipework as well as a diffusion-proof and highly efficient insulation. The continuous flow cooler is optionally available with circulation pump, pump manometer, pump overflow valve for pump protection. The medium circuit (piping, evaporator and pumps) is designed for a defined flow and pressure. Different pumps are available for special requests (more pressure and/or higher flow volume). Circulation media other than water (e. g. oil) are, of course, also feasible.
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