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LabPlant SD-05 Spray Dryer

The Lab Plant SD-05 Spray Dryer is now obsolete and has been replaced by the SD-Basic, SD-06A and SD-06AG models.

The Lab Plant SD-05 Spray Dryer is the result of nearly 30 years of continuous development in the field of laboratory scale spray drying systems.

The unit is self contained and is supplied complete and ready for immediate operation. Extremely compact in its design it is intended to be used on a bench top or with the optional mobile bench.

The SD-05 only requires connection to a 13 amp, 220/240 V, 50 Hz power supply and provision for exhausting the evaporated moisture to atmosphere or, if necessary, to an existing extraction system.


A self-priming peristaltic pump delivers the liquid from the sample container through a small diameter jet into the main chamber. Concurrently an integral compressor pumps air into the outer tube of the jet which causes the liquid to emerge as a fine, atomised spray.

Heated air is blown through the main chamber evaporating the liquid content of the atomised spray leaving the solid particles of the material, which are normally in a free flowing state, to be separated from the exhaust air flow by a cyclone and collected in the sample collection bottle.

The exhaust air flow is directed through a flexible 50 mm diameter hose direct to atmosphere or to an existing extraction system. An accessory in-line Wet Scrubber system is also available which effectively cleans the exhausted air.


Spray drying can be used in a varied range of applications where the production of a free flowing powder sample is required.

The SD-05 has successfully processed samples in the following areas:

  Flavours and Colourings
  Milk and Egg Products
  Plant and Vegetable Extracts
  Heat Sensitive Materials
  Polymers and Resins
  Ceramics and Superconductors
  Soaps and Detergents
s   Adhesives
  Bones, Teeth and Tooth Amalgam and many others.

Most solutions can be spray dried providing that the resulting product has the characteristics of a solid material.

The spray drying process is successful, in many instances, in micro-encapsulation where the liquid product is mixed with a suitable filmogenic protecting material. The resulting atomised spray forms hollow globules with a diameter of approximately 10-20 μm in which the product is encapsulated. This method is mainly used where the product is sensitive to moisture, ambient atmosphere, contact with other products, evaporation or oxidation.

A further process is englobulation which is similar to micro-encapsulation but is based on the solid product rather than the liquid and solution is prepared from the product to be processed with a filmogen and a solvent (usually water).

The solution is spray dried and the resulting product is in the form of small globules. In this process the encapsulation is not always totally enveloped but it is of advantage when a sample is required to be freely accessible on the surface.


A robust all-steel cabinet, coated with a hard chemically resistant finish, houses all mechanical and electrical components necessary to perform the spray drying process. All clamps and fittings are designed to allow assembly and removal of the glass components in only a matter of seconds.

The rear of the cabinet includes an inlet filter designed to remove 99.99% of air laden particles ensuring that the drying air does not include contaminants.


The stainless steel spray assembly consists of an inner tube for the liquid sample leading to a close tolerance internal diameter jet. The outer tube directs the supply of compressed air to the nozzle and the close tolerance gap between the nozzle and the jet ensures that the liquid jet is produced as a fine vapourised spray. The SD-05 is supplied as standard with 0.5 mm jet.

The spray assembly has an automatic plunger de-blocking device which when the head is depressed causes a fine, spring restrained needle to push through the jet. This feature is activated by an integral compressor.

De-blocking is sometimes necessary with materials which may solidify in the jet or when large particles in suspension cause blockages in the jet.


The unit is designed to ensure that all functions are simple to select and adjust, to quickly achieve the optimum conditions for Spray Drying. The control panel includes:

  Inlet temperature setting and digital display of actual temperature.
  Outlet temperature with digital indication.
  Mains connection indicator.
  On/off switch and indicator for all systems.
  On/off switch and indicator for blower.
  Blower control (operates a butterfly valve in the air inlet).
  On/off switch indicates for heater (this will not operate until the blower is switched on).
  On/off switch and indicator for compressor.
  Compressor air flow valve control.
  Automatic jet de-blocking frequency control knob (operated by integral compressor).
  On/off switch and indicator for Pump.
  Pump Speed Control.

Data Sheet
Service Manual

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

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SD-Basic (Aqueous)

SD-06A (Aqueous)

SD-06AG (Aqueous & Solvent)

Super 7 (Aqueous & Solvent)




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