Variocool
Circulation
Chillers
Circulation chillers for variable use in laboratory, mini-plant and production for temperatures from -25 up to 80 °C
The LAUDA Variocool circulation chillers offer a broad performance spectrum for demanding temperature control tasks. The color TFT screen makes operation easy. A USB interface and an alarm contact are integrated as standard features. Additional interfaces are available as accessories. They are located in the front of the device, which means they are easy to access.
The circulation chillers with their multitude of options are very well suited to a number of different areas of application. Optional pumps, for example, enable higher supply pressure. Optional heating units, which are adapted to the cooling capacity, enable the quick heating of the connected application when needed.
Application examples
- Central cooling water supply in laboratories
- Cooling of analytical devices
- Temperature control of bioreactors
- Supply to cooling traps
Download a PDF of our Variocool brochure:
LAUDA Variocool Brochure
Working temperature min.
-25 °C
Working temperature max.
80 °C
3 models in air or water-cooled design with cooling capacities from 600 W up to 10 kW – the appropriate solution to every requirement
All models with electronic expansion valve – good temperature control and cost savings thanks to reduced energy consumption
Due to their compact design, units up to 2 kW of cooling capacity can be placed under the laboratory table – saves valuable lab space
Display and operation via color TFT screen and membrane keyboard – easy and clear setup options
Electronic fill gauge on the display and low level alarm when fluid level too low – early detection of insufficient fluid
Options for flexible customization to applications:
– high power pumps
– heaters
– flow control
– outdoor installation
– use with DI water
– noise reduction
USB interface and alarm contact standard features in the front of the device – easy accessibility
Retrofittable interfaces as accessory:
– analog module
– RS-232/485 interface
– contact modules
– profibus module
– Pt100/LiBus module
Front grid can be easily removed without tool – easy to clean condenser
Tower design for larger models (from VC 7000) – space-saving setup
Microchannel condensers in all air-cooled models – reduced footprint and lower refrigerant quantity
All models (except VC 600) with adjustable bypass and pressure gauge – connection of pressure sensitive applications
Variocool Circulation chillers with cooling capacities up to 2 kW
Variocool circulation chillers function in an operating temperature range of -20 to 40 °C. Optional heaters can be added to increase the maximum temperature to 80 °C. For greater pressure requirements, optional pumps are available with the VC 1200 version or higher. With the exception of the VC 600, all models are also available as water-cooled versions. All devices are equipped with lockable casters. The compact dimensions of the models from VC 600 to VC 2000 (W) allows to place them under the laboratory table.
Variocool Circulation chillers with cooling capacities up to 5 kW
The models VC 3000 and VC 5000 offer cooling capacities of 3 and 5 kW. They are also available in water-cooled design (W). For flexible adaption to different applications the chillers can also be delivered with optional high-power pumps or heaters. Further options are a flow control, outdoor-installation or a noise reduction for the types VC 5000 and VC 5000 W.
Variocool Circulation chillers with cooling capacities up to 10 kW
The highly efficient tower design circulation chillers provide cooling capacities between 7 and 10 kW. Options like heating or high-power pumps add to the devices‘ areas of application. The models are available in air or water-cooled design. All models are equipped with casters which can be controlled and locked.
Variocool Circulation Chillers
| Technical features | VC 1200 | VC 1200 W | VC 2000 | VC 2000 W | VC 3000 | VC 3000 W | VC 5000 | VC 5000 W | VC 7000 | VC 7000 W | VC 10000 | VC 10000 W |
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| Working temperature min. °C | -20 | -20 | -20 | -20 | -20 | -20 | -20 | -20 | -25 | -25 | -25 | -25 | Working temperature max. °C | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | Bath volume min. L | 8.0 | 8.0 | 8.0 | 8.0 | 20.0 | 20.0 | 20.0 | 20.0 | 48.0 | 48.0 | 48.0 | 48.0 | Temperature stability ±K | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.10 | 0.10 | 0.10 | 0.10 | Pump pressure max. bar | 0.9 | 0.9 | 0.9 | 0.9 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | Pump flow max. L/min | 28 | 28 | 28 | 28 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | Cat. No. 208-220 V; 60 Hz | L000752 | L000760 | L000754 | L000762 | L000755 | L000763 | Cat. No. 208-220 V; 3/PE; 60 Hz | L000756 | L000764 | L000757 | L000765 | L000758 | L000766 | Cat. No. 208-220 V; 60 Hz High Flow Pump | 3.2 bar; L000988 | 3.2 bar; L001003 | 3.2 bar; L000992 | 3.2 bar; L001008 | 4.8 bar; L000994 | 4.8 bar; L001009 | Cat. No. 208-220 V; 3/PE; 60 Hz High Flow Pump | 5 bar; L000996 | 5 bar; L001011 | 5 bar; L000998 | 5 bar; L001013 | 5 bar; L001000 | 5 bar; L0001015 |
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Variocool NRTL Circulation Chillers
| Technical features | VC 1200 NRTL | VC 2000 NRTL | VC 5000 NRTL | VC 10000 NRTL | VC 1200 W NRTL | VC 2000 W NRTL | VC 5000 W NRTL | VC 10000 W NRTL |
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| Working temperature min. °C | -20 | -20 | -20 | -25 | -20 | -20 | -20 | -25 | Working temperature max. °C | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | Bath volume min. L | 9.0 | 9.0 | 14.0 | 52.0 | 9.0 | 9.0 | 14.0 | 52.0 | Temperature stability ±K | 0.05 | 0.05 | 0.10 | 0.10 | 0.05 | 0.05 | 0.10 | 0.10 | Pump pressure max. bar | 3.1 bar @ 50 Hz / 4.1 bar @ 60 Hz | 3.1 bar @ 50 Hz / 4.1 bar @ 60 Hz | 5.3 bar @ 50 Hz / 7.3 bar @ 60 Hz | 5.3 bar @ 50 Hz / 7.3 bar @ 60 Hz | 3.1 bar @ 50 Hz / 4.1 bar @ 60 Hz | 3.1 bar @ 50 Hz / 4.1 bar @ 60 Hz | 5.3 bar @ 50 Hz / 7.3 bar @ 60 Hz | 5.3 bar @ 50 Hz / 7.3 bar @ 60 Hz | Pump flow max. L/min | 37 L/min @ 50 Hz / 44 L/min @ 60 Hz | 37 L/min @ 50 Hz / 44 L/min @ 60 Hz | 56 L/min @ 50 Hz / 65 L/min @ 60 Hz | 63 L/min @ 50 Hz / 75 L/min @ 60 Hz | 37 L/min @ 50 Hz / 44 L/min @ 60 Hz | 37 L/min @ 50 Hz / 44 L/min @ 60 Hz | 56 L/min @ 50 Hz / 65 L/min @ 60 Hz | 63 L/min @ 50 Hz / 75 L/min @ 60 Hz | Cat. No. 200-230 V; 50/60 Hz | L002818 | L002819 | L002822 | L002823 | Cat. No. 400 V; 3/PE; 50 Hz & 460 V; 3/PE; 60 Hz | L002820 | L002821 | L002824 | L002825 |
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Cooling water tubing, EPDM
Temperature range from -40…100 °C and pressure range max. 20 bar
| Cat. No. | Description | di (mm) | de (mm) |
| RKJ 031 | EPDM tubing, fiber-reinforced | 13 | 19 |
| RKJ 032 | EPDM tubing, fiber-reinforced | 19 | 27 |
| RKJ 033 | EPDM tubing, fiber-reinforced | 25 | 34 |
Polymer tubing
EPDM tubing
| Cat. No. | di (mm) | Temperature range °C |
| RKJ 111 | 9 | 10…90 |
| RKJ 112 | 12 | 10…90 |
Tube clips, stainless steel
To secure tubings
| Cat. No. | Description |
| EZS 032 | Tube clip 16-27 mm, 1/2″ external Ø |
di = internal diameter; de = external diameter
Heat transfer liquids
| Designation | Temperature range | Cat. No. 5 L | Cat. No. 10 L | Cat. No. 20 L |
| Aqua 90 | 5…90 °C | LZB 120 | LZB 220 | LZB 320 |
| Kryo 30 | -30…90 °C | LZB 109 | LZB 209 | LZB 309 |
Interface modules
| Cat. No. | Description |
| LRZ 912 | Analog module, 2 x In, 2 x Out, 0(4)…20 mA or 0…10 V |
| LRZ 913 | RS 232/485 interface, electrically isolated, 9-pin SUB-D |
| LRZ 914 | Contact module NAMUR, 1 x In, 1 x Out, NE 28, 2 DIN sockets |
| LRZ 915 | Contact module SUB-D, 3 x In, 3 x Out, 15-pin SUB-D |
| LRZ 917 | Profibus interface, electrically isolated, 9-pin SUB-D |
| LRZ 918 | Pt100/LiBus module |