LAUDA Puridest PD 4 G Water Distillation Apparatus, Glass Distillation Apparatus, L003018

The LAUDA Puridest PD 4 G water distillation unit is a specialised, cryogenic and thermotechnically advanced laboratory system solution for the fully automated production of high-purity, sterile and germ-free ultrapure water (mono-distillate). In demanding physico-chemical and medical laboratory applications such as sample dilution, reagent preparation or instrumental analysis, absolute purity of the source medium is essential to rule out process-related artefacts and microbiological contamination. The compact system delivers a constant output of approximately 4 litres per hour with an excellent conductivity of 2.2 µS/cm at 25 °C. For laboratory managers and industrial procurement departments, this glass distillation apparatus offers the highest level of validity and operational reliability, as it can be commissioned without specialist staff and is optimised for the treatment of ordinary raw water.

Thermodynamic phase transition and visible ultra-pure water quality

The distillation-based purification principle of this fully automatic unit is based on the precise thermal evaporation and subsequent recondensation of the medium. An outstanding material-related feature is that the evaporator, condensers and overflow pipes are manufactured entirely from high-purity DURAN / borosilicate glass 3.3. This material-science specification guarantees absolute inertness towards both the gaseous and liquid phases, thereby permanently ruling out metallic cross-contamination whilst preserving the integrity of the materials. Thanks to an easily removable, shatterproof and non-fogging front pane, the entire distillation process can be visually monitored. The integrated condensers are also fitted with a drip-resistant vapour guide (drip protection) and can be sterilised directly within the system via the targeted vapour guide.

Quartz-sheathed heating elements and highly efficient energy recovery

The thermal heating concept of the LAUDA Puridest PD 4 G is implemented using high-performance electric heating rods fitted with a high-quality quartz glass sheath. This sheath not only minimises abrasive wear caused by limescale deposits in the boiler but also ensures highly efficient heat radiation to the surrounding fluid. With a heating output of 3 kW, the system ensures extremely short pull-down times to the boiling point. To drastically reduce operating costs, the system utilises an intelligent energy recovery concept: the cooling water used to condense the steam – which is heated in a way that is gentle on the material – is fed directly into the evaporator boiler, significantly minimising overall energy consumption.

Cybernetic contamination monitor and automated media management

To ensure seamlessly monitored quality management, the unit is equipped with a process-reliable cybernetic monitoring system. An integrated electronic contamination monitor continuously measures the status inside the evaporator; in the event of critical contamination levels, it automatically initiates a water change to thoroughly flush and clean the boiler. An integrated solenoid valve controls the water supply in a way that is gentle on the material and blocks the inflow once the target state is reached, thereby reliably preventing unnecessary wastage of cooling water resources (approx. 1.2 l/min). An electronic level monitoring system and a dual water shortage safety feature instantly disconnect the system from the power supply should the raw water supply fail, enabling self-sufficient and unattended continuous operation in the laboratory.

Technical details

Distillation & Metrological Specifications

• Apparatus type: Single-glass distillation apparatus / Fully automatic without storage tank
• Production capacity: approx. 4.0 l/h
• Conductivity of mono-distillate at 25 °C: 2.2 µS/cm
• Condenser sterilisation: Can be carried out using steam directly within the system
• Degassing: Integrated CO₂ degassing port via the condenser outlet

Thermodynamics & Fluid Management

• Max. heating power: 3 kW
• Max. power consumption: 3 kW
• Heating elements: Special heating rods with quartz glass sheathing
• Cooling water flow rate / consumption: approx. 1.2 l/min
• Minimum cooling water pressure differential: 3 bar
• Max. cooling water pressure: 7 bar
• Distillate outlet: Via hose connection on the right-hand side of the unit

Design, protection & safety

• Material (in contact with sample): DURAN / borosilicate glass 3.3 (evaporator, condensers, overflows)
• Housing material: Galvanised sheet steel, high-quality powder-coated
• Viewing window: Easily removable, shatterproof and non-fogging front pane
• Installation: Suitable for flexible tabletop use or secure wall mounting
• Safety systems: Electronic contamination monitor with automatic water change, electronic level monitoring, low-water protection (dry-run protection)
• Water control: Integrated solenoid valve for automatic water shut-off

Dimensions & Logistics

• Unit dimensions (W x D x H): 650 x 365 x 390 mm
• Net weight: approx. 24 kg
• Ambient temperature range: 10 to 40 °C
• Mains supply: 230 V / 50/60 Hz
• Mains connection: Sturdy mains cable with Schuko plug

Contents of delivery

• 1 x LAUDA Puridest PD 4 G water distiller base unit (MPN: L003018)
• 1 x Integrated mains cable with Schuko plug
• 1 x operating instructions

Important note: Connecting hoses for the water inlet and outlet, as well as pre-filter components compliant with the manufacturer’s specifications, are not included as standard and must be configured separately.

Individual requirements & accessories

To provide mechanical protection for the glass distillation flask against rapid limescale build-up and to extend maintenance intervals, the use of water treatment components in the upstream system is recommended, depending on local water hardness. Our product range includes suitable dechlorination filters, phosphate cartridges for hardness stabilisation and 1 µm pre-filters. For flexible operation with external storage systems, the unit can be connected to an external level switch to adjust distillate production to the fill level of a separate tank. Please use our procurement service to design your laboratory water infrastructure to suit your specific requirements.