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This chemistry pumping unit has a wide range of applications like evacuation, evaporation and pumping of gases and vapors in chemical, biological and pharmaceutical laboratories. Typical applications are rotary evaporators, vacuum concentrators and vacuum drying ovens with high boiling solvents. The manual flow control valve regulates the effective pumping speed at the vacuum connection; the vacuum manometer offers an analog vacuum display. The separator at the inlet (AK), made of glass with a protective coating, retains particles and liquid droplets. The exhaust waste vapor condenser enables near-100-percent solvent recovery.

Performance features
• outstanding chemical resistance and superior vapor tolerance
• exceptionally high performance even at low vacuum
• excellent ultimate vacuum even with gas ballast
• manual vacuum control, analog vacuum display
• excellent environmental friendliness due to efficient solvent recovery

Advanced control technology and a small bath fluid reservoir enable highly dynamic temperature control systems to achieve rapid heat-up and cool-down. This gives you the ability to handle difficult temperature challenges quickly.
The PRESTO® systems are designed for precise temperature control as well as rapid temperature changes, making them ideal for reactor vessels, material stress tests, or temperature simulations. These instruments cover a working temperature of -92 to +250 °C with high cooling and heating capacity.
• USB connection
• For highly precise, external temperature applications
• Rapid heating and cooling
• Wide working temperature ranges without changing fluids
• Highest performance with small footprint
• Space-saving design optimizes space utilization in your lab
• Ethernet interface
• SD-Card slot
• RS232 / RS485 (optional) / Profibus DP (optional)
• Connections for alarm-output, Pt100 external sensor and standby-input
• Removable ventilation grid
• Highly precise ICC cascade temperature control
• Electronic level indication
• Integrated programmer
• Unsurpassed power and efficiency
• Space optimized design creates more room directly next to the units
• External Pt100 sensor connection

The highly dynamic temperature control systems PRESTO are designed for high-precision temperature control for a wide range of applications such as reactor vessels or material stress tests. Moreover, by using efficient components, the process systems can compensate exothermic and endothermic reactions exceptionally fast. Permanent internal monitoring and self-lubricating pumps ensure a long life-time. In addition, numerous interfaces offer many remote control possibilities across networks or for integration into higher-level control systems.
• External Pt100 sensor connection
• Alarm output
• Second external Pt100 sensor connection (accessory)
• Built-in 5.7’’ industrial color touchscreen
• Analog connections, RS485, Profibus DP (accessory)
• Integrated gas warning sensor, electrically wired and calibrated
• Intelligent warning and safety functions
• Pump pressure up to 3 bar

The highly dynamic temperature control systems PRESTO are designed for high-precision temperature control for a wide range of applications such as reactor vessels or material stress tests. Moreover, by using efficient components, the process systems can compensate exothermic and endothermic reactions exceptionally fast. Permanent internal monitoring and self-lubricating pumps ensure a long life-time. In addition, numerous interfaces offer many remote control possibilities across networks or for integration into higher-level control systems.
• External Pt100 sensor connection
• Alarm output
• Second external Pt100 sensor connection (accessory)
• Built-in 5.7’’ industrial color touchscreen
• Analog connections, RS485, Profibus DP (accessory)
• Integrated gas warning sensor, electrically wired and calibrated
• Intelligent warning and safety functions
• Pump pressure up to 5.5 bar

• Due to its blade dimensions, the pitched-blade impeller PR 30 is ideal for solutions, emulsions and suspensions in vessels with the following characteristics:
• Ideal vessel diameter: 145- 290 mm
• Ideal ground clearance: 29- 58 mm
• Ideal filling level: 145- 290 mm
• Ideal volume: 2,400- 19,200 ml
• The pitched-blade impeller PR 30 has a total length of 400 mm and is made of stainless steel. Its stirring shaft has a diameter of 8 mm.

For optimum loading of 56 half petri dishes.
• Area of application: reprocessing laboratory glassware
• Suitable for 56 half petri dishes with Ø 100 mm
• Equipped with 56 holders, height 70 mm, distance apart approx. 26 mm
• For use in lower basket

Machine affiliation:
G 7825
PG 8527
PG 8535
PG 8536
PLW 8636 [LAB / LAB MON]
PG 8504
PG 8583
PG 8583 CD
PG 8593
PLW 8505
PLW 8604
PLW 8615
PLW 8616
PLW 8617
PLW 8683
PLW 8683 CD
PLW 8693
PLW 6011
PLW 6111
PLW 7111

• Due to its blade dimensions, the ringed pitched-blade impeller PR 31 is ideal for solutions, emulsions and suspensions in vessels with the following characteristics:
• Ideal vessel diameter: 83- 165 mm
• Ideal ground clearance: 17- 33 mm
• Ideal filling level: 83- 165 mm
• Ideal volume: 400- 3,500 ml
• The ringed pitched-blade impeller PR 31 has a total length of 400 mm and is made of stainless steel. Its stirring shaft has a diameter of 8 mm.

For optimum loading of 56 half petri dishes.
• Area of application: reprocessing laboratory glassware
• Suitable for 56 half petri dishes with Ø 100 mm
• Equipped with 56 holders, height 70 mm, distance apart approx. 26 mm
• For use in lower basket

Machine affiliation:
G 7825
PG 8527
PG 8535
PG 8536
PLW 8636 [LAB / LAB MON]
PG 8504
PG 8583
PG 8583 CD
PG 8593
PLW 8505
PLW 8604
PLW 8615
PLW 8616
PLW 8617
PLW 8683
PLW 8683 CD
PLW 8693
PLW 6011
PLW 6111
PLW 7111

Double system, volume-controlled in compact design, for softening ironand manganese-free drinking water, in accordance with the Drinking Water Ordinance, fully automatic 5-stage central control valve type 9100 SE with intelligent control electronics made of gunmetal with adapter for the second pressure vessel. 2 pressure tanks made of corrosion-resistant GRP, including a high-quality cation exchanger. 1 cabinet brine tank with a sieve floor and a float valve (safety valve).

Technical data

• Maximum flow rate: 1.9 m³/h at 1.6 bar pressure loss
• Resin quantity: 2 x 5 litres
• Salt consumption: approx. 1.2 kg/reg.
• Operating pressure: 3 to 6 bar
• Max. water temperature: 40°C
• Max. ambient temperature: 5 to 40°C
• Dimensions of housing: approx. W 585 x D 555 x H 622 mm
• Electrical connection: 230 V 50 Hz
• Water connection: R 1’
• waste water connection R ½’

• Area of application: reprocessing laboratory glassware
• Suitable for test tubes up to 12 x 200 mm
• Divided into 6 surfaces
• Mesh width 9 x 9 mm
• For use in lower basket
• Including lid A 13

Machine affiliation:
G 7825
PG 8527
PG 8535
PG 8536
PLW 8636 [LAB / LAB MON]
PG 8504
PG 8583
PG 8583 CD
PG 8593
PLW 8615
PLW 8616
PLW 8617
PLW 8683
PLW 8683 CD
PLW 8693
PLW 6011
PLW 6111
PLW 7111
PLW 8505
PLW 8604

• Due to its blade dimensions, the ringed pitched-blade impeller PR 32 is ideal for solutions, emulsions and suspensions in vessels with the following characteristics:
• Ideal vessel diameter: 113- 225 mm
• Ideal ground clearance: 23- 45 mm
• Ideal filling level: 113- 225 mm
• Ideal volume: 1,100- 8,900 ml
• The ringed pitched-blade impeller PR 32 has a total length of 400 mm and is made of stainless steel. Its stirrer shaft has a diameter of 8 mm.

Double system, volume-controlled, for softening drinking water that is free of iron and manganese, in accordance with the Drinking Water Ordinance, fully automatic 5-stage central control valve type Fleck 9100 SXT with intelligent control electronics made of gunmetal/plastic with an adapter for the second pressure vessel. 2 pressure tanks made of corrosion-resistant GRP, including a high-quality cation exchanger. 1 brine tank with a sieve floor and float valve (safety valve).

Technical data

• Operating pressure: 3 to 6 bar
• Max. water temperature: 40°C
• Max. ambient temperature: 5 to 40°C
• E lectrical connection: 230 V 50 Hz
• Dimensions of housing: approx. W 350 x D 460 x H 1180 mm
• Water connection: R 1’

• Due to its blade dimensions, the ringed pitched-blade impeller PR 33 is ideal for solutions, emulsions and suspensions in vessels with the following characteristics:
• Ideal vessel diameter: 165- 330 mm
• Ideal ground clearance: 33- 66 mm
• Ideal filling level: 165- 330 mm
• Ideal volume: 3,500- 28,200 ml
• The ringed pitched-blade impeller PR 33 has a total length of 400 mm and is made of stainless steel. Its stirrer shaft has a diameter of 8 mm.

For the optimum loading of up to 18 beakers.
• Area of application: reprocessing laboratory glassware
• Suitable for 18 glass beakers
• Equipped with 18 x 3 stay bars
• For use in upper and lower basket

Machine affiliation:
G 7825
PG 8527
PG 8535
PG 8536
PLW 8636 [LAB / LAB MON]
PG 8504
PG 8583
PG 8583 CD
PG 8593
PLW 8505
PLW 8604
PLW 8615
PLW 8616
PLW 8617
PLW 8683
PLW 8683 CD
PLW 8693
PLW 6011
PLW 6111
PLW 7111

Laboratory refrigerators and freezers are expected to provide the highest level of safety and reliability. The precise electronic control, forced-air cooling system, and highly efficient insulation ensure exceptional energy efficiency, leading to low operating costs while safeguarding the environment. The advanced components and precise regulation ensure the optimal storage of materials over the long term.

Product Features

Easy Operation
User-friendly solutions for daily use

• Full-height integrated handle
• 2.4” color electronic interface with touch & swipe functionality
• Easy-to-clean stainless steel interior
• Flush-mounted, full-height internal side LED lighting

Safety and Reliability

• Ventilated cooling system
• NoFrost cooling technology
• Temperature range: -9 °C to -35 °C
• Temperature stability: ±5 °C maximum
• VCC variable speed compressor
The variable speed compressors ensure the right performance is always available. This results in reduced energy consumption and improved temperature stability.
• Optical and acoustic alarms in case of failure
• SafetyDevice: prevents the temperature from dropping below +2 °C, avoiding freezing
• PT1000 product temperature sensor
In addition to the built-in control sensor, another temperature sensor is available to measure simulated product temperature. The value measured by the product temperature sensor can also be displayed on the screen. The value can be calibrated, and the device’s alarm thresholds will then be based on this value, ensuring safer storage based on real product temperature values.
• Power failure alarm
In case of a power outage, the built-in battery maintains power for at least twelve hours, activating an immediate audible and visible alarm. Additional indication of the start of the power outage and the maximum temperature reached is also provided.
• LightAlarm
If the internal temperature rises unchecked, the door is left open, or other issues occur, the internal lighting will begin to flash.
• Alarm history: Simple quality control
The last 10 alarms, including key data like date and maximum temperature, are logged for final quality assessment of stored goods.
• Built-in data logger: traceable for years
Complete traceability independent of monitoring systems through logging of the temperature profile, alarm history, and service information for up to 5 years. Stored data can be read via USB port.
• Door automatically closes if opened less than 90°
• Probe access port: 1 x Ø 12 mm
• Electronic locking system: protection against unauthorized access with PIN or remote lock/unlock capability
• SmartLock: automatic door locking in case of temperature alarm, which can only be unlocked by authorized personnel
• Long lifespan

Compliance and Documentation

• Complies with DIN 13277 and IEC 61010-2-011
Liebherr laboratory and pharmaceutical refrigeration units meet all the characteristics and performance criteria necessary for full compliance with the DIN 13277 standard. DIN 13277 specifies requirements and test procedures for refrigeration and freezer equipment used in laboratories and for storing pharmaceuticals.
• IEC 60068-3 standard for temperature distribution and consistency
• IEC 61010-2-011 standard for safety
• Temperature adjustment (calibration)
• Recording of minimum/maximum temperature values
• Integrated connectivity (LAN or WiFi for BMS or SmartMonitoring system)

Technical Specifications

• Gross/net volume: 1391/1091 l
• External dimensions (W/D/H): 1427/867/2135 mm
• Internal dimensions (W/D/H): 1210/638/1470 mm
• White, stainless steel external casing
• Door/Cover material: steel
• Adjustable shelves: 8
• Shelves: plastic-coated grates
• Usable shelf size, mm (W/D): 570 / 788
• Shelf load capacity: 60 kg
• Door opening: right fixed / left fixed
• Castors with arrestor at the front, fixed castors at the rear
• Gross/net weight: 235/210 kg
• Energy consumption/year: 1162 kWh
• Ambient temperature: +10 °C to +35 °C
• Heat emission: 1485 kJ/h
• Refrigerant: R 290
• Noise level: 60 dB(A)
• Frequency / voltage: 50/60 Hz / 220-240 V~a

• Due to its stirrer blade dimensions, the PR 39 pitched-blade impeller is ideal for homogenizing very viscous media in vessels with the following characteristics:
• Ideal vessel diameter: 188- 375 mm
• Ideal ground clearance: 38- 75 mm
• Ideal filling level: 188- 375 mm
• Ideal volume: 5,200 - 41,400 ml
• The pitched-blade impeller consists of a PTFE mixing blade and a PTFE-coated stainless steel shaft. The stainless-steel core ensures the stability of the stirrer shaft and the secure attachment in the overhead stirrer. The diameter in the clamping area is 6,5 mm; the stirrer shaft with the thick-walled PTFE coating has a diameter of 8 mm.
• Due to its anti-adhesive property (non-stick coating), the pitched-blade impeller is easy to clean and can be used up to a maximum application temperature of 250°C.

For optimum loading of 80 test tubes, 16 x 105 mm.
• Area of application: reprocessing laboratory glassware
• Suitable for 80 test tubes up to 16 x 105 mm
• Additionally equipped with a lid
• Mesh width on the base 8 x 8 mm

Machine affiliation:
G 7825
PG 8527
PG 8535
PG 8536
PLW 8636 [LAB / LAB MON]
PG 8504
PG 8583
PG 8583 CD
PG 8593
PLW 8604
PLW 8615
PLW 8616
PLW 8617
PLW 8683
PLW 8683 CD
PLW 8693
PLW 6011
PLW 6111
PLW 7111
PLW 8505

Our PC 600-series chemistry pumping units of this series are an excellent choice for supporting electronically controlled evaporation or drying processes with even many high boiling point solvents. Our popular MD 4C NT three-stage chemistry diaphragm pump, with its 2 mbar ultimate vacuum rating, is the heart of these pumping units. Typical applications include lab applications such as rotary evaporation, vacuum drying ovens, and vacuum distillation.
The integrated VACUU•SELECT controller provides an easy-to-use, application based interface that covers all common lab applications. The VACUU•SELECT controller has you covered. Use manual set-point-control for simple processes, run distillations, or create your own application with simple drag-and-drop editing. For solvent evaporation, it constantly monitors the pressure and switches to 2 point control mode to hold the pressure stable when a boiling point is detected. The controller also allows for easy manual vacuum control for simple processes. The inlet separator, made of glass with protective coating, prevents particles and liquid droplets from entering the pump. The exhaust vapor condenser provides nearly 100% recovery of solvents for economical recycling and environmental protection.

Performance features
• VACUU•SELECT vacuum controller with graphical user interface simplifies work in the laboratory
• predefined applications save time and give reproducible results
• easy-to-use application editor allows own process sequences
• meets high vacuum requirements for most high boiling solvents
• excellent environmental friendliness due to efficient solvent recovery

• Due to the jagged shape of the stirrer blade, the radial flow impeller TR 20 is ideally suited for the construction of emulsions and the gassing or foaming of liquids in vessels with the following characteristics:
• Ideal vessel diameter: 80- 140 mm
• Ideal ground clearance: 14- 28 mm
• Ideal filling level: 80- 140 mm
• Ideal volume: 400- 2,200 ml
• The radial-flow impeller TR 20 has a total length of 400 mm and is made of stainless steel. Its stirrer shaft has a diameter of 8 mm.

• Due to the jagged shape of the stirrer blade, the radial flow impeller TR 21 is ideally suited for the construction of emulsions and the gassing or foaming of liquids in vessels with the following characteristics:
• Ideal vessel diameter: 143- 250 mm
• Ideal ground clearance: 25- 50 mm
• Ideal filling level: 143- 250 mm
• Ideal volume: 2,300- 12,300 ml
• The radial-flow impeller TR 21 has a total length of 400 mm and is made of stainless steel. Its stirrer shaft has a diameter of 8 mm.