The Lab Plant SD-05 Spray Dryer is now obsolete and has been replaced by the SD-Basic, SD-06A and SD-06AG models.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
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
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
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
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
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
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.
TWO FLUID NOZZLE
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
De-blocking is sometimes necessary with
materials which may solidify in the jet or
when large particles in suspension cause
blockages in the jet.
CONTROLS AND FUNCTIONALITY
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.