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Laboratory Vacuum Drying Oven - LED PID Controller

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The S4R Laboratory Vacuum Drying Oven is designed for controlled drying and thermal conditioning of laboratory materials under reduced pressure. Combining vacuum operation with programmable temperature control, the system provides a stable processing environment for materials requiring reduced-pressure drying or controlled thermal treatment.

The standard working chamber is manufactured from 304 stainless steel with a polished internal surface for routine laboratory cleaning and maintenance. An LED microprocessor PID controller provides temperature regulation, timing functionality and over-temperature protection, while the dual-layer tempered-glass door allows direct observation of the chamber during operation.

The S4R VDO series covers multiple chamber capacities and configurations for laboratory-scale processing. Optional KF25 vacuum connection, inert-gas inlet valve and door LED lighting allow the oven to be adapted to specific vacuum and controlled-atmosphere workflows.

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VDO Series — Vacuum Drying Ovens

Laboratory Vacuum Drying Oven

The VDO Series combines PID-controlled heating with reduced-pressure operation for drying, conditioning and thermal processing of powders, electrodes, ceramics and laboratory components. Reduced pressure lowers the evaporation temperature of water and compatible volatile compounds, which can allow thermosensitive or easily oxidised materials to be dried below the temperature required under atmospheric-pressure conditions.

Twenty-one references cover seven chamber volumes from 10 L to 216 L. Each reference defines a fixed combination of volume, heating power, shelf count, chamber material and temperature range.

Chamber volumes
10 / 24 / 30 / 50 / 90 / 125 / 216 L
Maximum temperature
Up to 200 °C
65 °C for VDO-B configurations
Vacuum degree
133 Pa
Chamber material
304 or 316 stainless steel

Key Features

Built for controlled drying under reduced pressure

Vacuum-assisted drying

The specified vacuum degree is 133 Pa. Reduced-pressure operation lowers the evaporation temperature of water and compatible volatile compounds, supporting drying at lower temperatures and reduced exposure to residual oxygen.

PID temperature control

LED microprocessor controller with timing function and over-temperature alarm. Display resolution 0.1 °C, temperature stability ±1 °C.

Stainless-steel chamber

Mirror-polished 304 stainless-steel chamber on standard and VDO-B references. A 316 stainless-steel chamber is used on the 30 L chemistry references.

Sealed observation door

Dual-layer tempered glass window with an adjustable door system and silicone gasket, allowing the sample to be observed without breaking vacuum.

Heat transfer under vacuum

Loading affects drying behaviour

Under reduced pressure, convective heat transfer is reduced and heat transfer increasingly depends on conduction through the supporting surfaces and thermal radiation.

In practice, flat-bottomed containers and thin sample layers reach the setpoint more readily than deep vessels or loosely stacked material. Shelf count is therefore a process parameter as much as a capacity figure: more shelves distribute the load across more heated surfaces, while fewer shelves leave greater vertical clearance for tall containers.

Series Architecture

Three configurations

The reference defines chamber material, temperature range, volume, heating power and shelf count.

Standard

VDO 304 SS

Chamber: 304 stainless steel
Temperature: RT +10 to 200 °C
Volumes: 10, 24, 50, 90, 125, 216 L
Use: general laboratory vacuum drying

Chemistry

VDO 316 SS

Chamber: 316 stainless steel
Temperature: RT +10 to 200 °C
Volume: 30 L
Use: chemistry-oriented applications

Low temperature

VDO-B Series

Chamber: 304 stainless steel
Temperature: RT +10 to 65 °C
Volumes: 30 and 50 L
Use: low-temperature drying

Standard References

304 stainless steel, up to 200 °C

References sharing the same chamber volume differ by heating power and shelf count.

Reference Volume Power Shelves Interior W × D × H Exterior W × D × H
VDO-6012 10 L400 W2 220 × 210 × 220 mm500 × 375 × 410 mm
VDO-6020 24 L400 W1 300 × 300 × 275 mm605 × 490 × 450 mm
VDO-6022 24 L700 W2 300 × 300 × 275 mm605 × 490 × 450 mm
VDO-6024 24 L700 W4 300 × 300 × 275 mm605 × 490 × 450 mm
VDO-6050 50 L1450 W2 415 × 370 × 345 mm730 × 560 × 550 mm
VDO-6053 50 L1450 W3 415 × 370 × 345 mm730 × 560 × 550 mm
VDO-6055 50 L1450 W5 415 × 370 × 345 mm730 × 560 × 550 mm
VDO-6056 50 L1450 W6 415 × 370 × 345 mm730 × 560 × 550 mm
VDO-6092 90 L870 W2 450 × 450 × 450 mm740 × 610 × 591 mm
VDO-6094 90 L1950 W4 450 × 450 × 450 mm740 × 610 × 591 mm
VDO-6096 90 L1950 W6 450 × 450 × 450 mm740 × 610 × 591 mm
VDO-6123 125 L1500 W3 * 500 × 500 × 500 mm790 × 660 × 641 mm
VDO-6126 125 L2300 W6 500 × 500 × 500 mm790 × 660 × 641 mm
VDO-6213 216 L1550 W3 * 600 × 600 × 600 mm890 × 760 × 741 mm
VDO-6216 216 L2850 W6 600 × 600 × 600 mm890 × 760 × 741 mm

* VDO-6123 and VDO-6213 are supplied with three independently temperature-controlled shelves.

Chemistry References

316 stainless steel, 30 L, up to 200 °C

The chemistry configurations use a 316 stainless-steel working chamber for laboratory applications requiring this chamber material. They are the only 30 L references rated to 200 °C.

Reference Volume Power Shelves Interior W × D × H Exterior W × D × H
VDO-6030A 30 L850 W1 320 × 320 × 300 mm630 × 510 × 490 mm
VDO-6032 30 L850 W2 320 × 320 × 300 mm630 × 510 × 490 mm
VDO-6034 30 L850 W4 320 × 320 × 300 mm630 × 510 × 490 mm

Low-Temperature References

304 stainless steel, up to 65 °C

The VDO-B references use lower heating power and a reduced temperature ceiling for samples that must not be taken far above ambient temperature.

Reference Volume Power Shelves Interior W × D × H Exterior W × D × H
VDO-6030B 30 L300 W1 320 × 320 × 300 mm610 × 510 × 490 mm
VDO-6050B 50 L650 W2 415 × 370 × 345 mm730 × 560 × 550 mm
VDO-6055B 50 L650 W5 415 × 370 × 345 mm730 × 560 × 550 mm

Control and regulation

Stability, resolution and what they describe

Specified temperature stability is ±1 °C, with a display resolution of 0.1 °C. The controller incorporates timing functionality and an over-temperature alarm.

Stability describes temperature variation over time at the sensor position. It is not the same as spatial uniformity across the chamber, which is not specified for this series and which may be influenced by loading, shelf position and vacuum conditions. Where a documented temperature distribution is required, the temperature at the sample position should be verified with an independent probe.

Specifications

Common to all VDO references

Electrical requirement AC 220 V / 50 Hz
Controller LED microprocessor PID controller with timing function and over-temperature alarm
Temperature range — standard and 316 SS RT +10 to 200 °C
Temperature range — VDO-B RT +10 to 65 °C
Display resolution 0.1 °C
Temperature stability ±1 °C
Vacuum degree 133 Pa (approx. 1 Torr)
Ambient operating temperature +5 to +40 °C
Chamber material 304 stainless steel, mirror-polished; 316 stainless steel on the 30 L chemistry references
Observation window Dual-layer tempered glass
Door sealing Adjustable door system with silicone gasket

System integration

Planning the vacuum installation

The oven is the vacuum vessel of the installation. The complete vacuum installation may require a suitable vacuum pump, vacuum hose, fittings and process-specific accessories according to the intended configuration.

Achievable chamber pressure depends on the pump selected, the conductance of the connection, chamber loading and the condition of the door seal. For processes generating compatible vapours, appropriate vacuum-system protection may be required according to the material and process conditions. An optional inert gas valve allows controlled gas introduction into the chamber before opening.

Typical Applications

Laboratory materials and research workflows

Battery and electrode materials

Removal of residual solvent and moisture from coated electrodes, active powders and cell components before assembly, where exposure to water is detrimental to electrochemical performance.

Powders and ceramic precursors

Drying of milled powders, ceramic precursors, porous supports and specimens where sintering or subsequent processing requires a defined moisture state.

Laboratory components and tooling

Drying of coin-cell parts, jars, fixtures and assemblies after cleaning, prior to use in a glovebox or to storage under controlled conditions.

Thermosensitive and oxidation-prone materials

Processing of compatible materials that may degrade, oxidise or decompose under conventional atmospheric drying conditions, using reduced-pressure operation to support drying at lower temperatures.

Options

Ordered separately, not fitted as standard

The following items are available on request and must be specified with the order.

KF25 vacuum port

Standardised flange connection for direct assembly with KF25 hoses, valves and centring rings.

Inert gas valve

Dedicated inlet for controlled gas introduction into the chamber according to the intended laboratory process.

Door LED lighting

LED lighting for improved observation of the sample through the chamber door during operation.

Reference selection. Chamber volume alone does not define the configuration. Select the reference according to volume, heating power, shelf count, chamber material and temperature range. Note that no 304 stainless-steel reference is available in 30 L at 200 °C: a 30 L chamber rated to 200 °C is supplied in 316 stainless steel, while the 30 L VDO-B in 304 stainless steel is limited to 65 °C.

Chemical and safety limitations. No explosion-proof or ATEX rating is specified for this series. The ovens are not intended for drying flammable solvents or for use in explosive atmospheres. Compatibility between the sample, its residues and the stainless-steel chamber, the silicone gasket and the vacuum system should be verified before processing.

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