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BÜCHI Mini Spray Dryer B-191 Contents
Contents
1 Scope of delivery 2
2 Safety 3
3 Function 6
4 Putting into operation 7
4.1 Set up location 7
4.2 Installation of the compressed air treatment plant 7
4.3 Installation of glass parts 8
4.4 Installation of the product feed hose 8
4.5 Installation of the spray nozzle 9
4.6 Installation of the intake filter 9
4.7 Installation of the aspirator filter 10
4.8 Installation of the compressed air 10
4.9 Installation of the automatic nozzle cleaner 11
4.10 Installation of the pneumatic action cylinder on
the nozzle 12
4.11 Installation check 12
Read these instructions thoroughly before you use the BÜCHI
Mini Spray Dryer B-191. Store these instructions in the immediate vicinity of the apparatus so that they may be consulted
at any time.
Chapter 2 contains important safety information. Knowledge of
this is imperative for the safe operation of the Mini Spray Dryer.
Subject to technical change without notice. No part of these
instructions may be reproduced in any form whatsoever or
processed, reproduced or disseminated by means of electronic
or optical systems without the express written permission of
Büchi Labortechnik AG. All rights reserved.
Copyright © Büchi Labortechnik AG 1997
5 Operation 13
5.1 Layout of the operating and display elements 13
5.2 Spray process 14
5.3 End of spray process 15
5.4 Fault elimination 16
6 Maintenance 18
6.1 Cleaning 18
6.2 Customer service 18
6.3 Block diagram 19
7 Taking out of operation 20
7.1 Storage 20
7.2 Packing/transport 20
7.3 Disposal 20
8 Replacement parts 21
8.1 Replacement parts, basic apparatus 21
8.2 Replacement parts, glass assembly, white 22
8.2 Replacement parts, glass assembly, brown 22
8.3 Replacement parts, spray nozzle 23
8.4 Replacement parts, pneumatic nozzle cleaner 23
8.5 Replacement parts, intake filter 24
8.6 Replacement parts, aspiration filter 24
8.7 Accessories 25
9 Appendix 26
9.1 Technical data 26
9.2 Materials used 26
9.3 EC declaration of conformity 27
en, Version A (28 pages) Order No.
B-191 Instructions 96532
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1 Scope of delivery BÜCHI Mini Spray Dryer B-191
1 Scope of delivery
230 V/50 Hz 220 V/60 Hz
Order No.
1 Mini Spray Dryer with
manual nozzle cleaner 27612 27893
1 Mini Spray Dryer with
automatic nozzle cleaner 27903 27904
1 Mini Spray Dryer System 27920 27921
Enclosed parts:
1 Instructions:
German 96531
English 96532
French 96533
Italian 96534
Spanish 96535
1 CE declaration B-191 97679
1 Electrostatic arrester cable 27894
1 Key 04338
5 m “Nyflex” PVC hose D14/8 mm 04113
5 m Neoprene hose 04129
3,7 m Ventilation hose 44 mm 16236
2 Clamp 8/10-16 22352
1 Allen wrench 03776
1 ICO compressed air quick connector 04155
1 Nipple (screw) 1/4” 8 mm 04156
Figure 1: Mini Spray Dryer B-191
Table 1: Enclosed parts
Optional accessories:
1 Glass set in brown glass 27909
1 Magnetic stirrer 27940
1 Aspirator filter 16482
1 Automatic nozzle cleaner 27905
1 Drying air intake filter 11235
1 Completely automatic compressed air 27907
plant, compressor
1 Wilkerson maintenance unit for 04366
compressed air
1 Protection shield 27725
1 Filter sacks (6 units) 35004
Table 2: Optional accessories
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BÜCHI Mini Spray Dryer B-191 2 Safety
2 Safety
The apparatus has been built in accordance with state-of-the
art technology and recognized safety regulations.
Nonetheless risks and dangers can arise from the apparatus:
• If the apparatus is operated by insufficiently trained personnel.
• If the apparatus is not used as directed.
2.1 Symbols
Stop
Information on dangers which can lead to serious damage to
property, to severe or life-threatening injuries.
Warning
Information on dangers which can lead to damage to health
or property.
Please note
Information on technical requirements. Noncompliance can
lead to faults, inefficiency and production losses.
2.2 Requirements for the operator
The Mini Spray Dryer B-191 is only to be used by laboratory
and specialist personnel and other persons, who, because of
their training or professional experience, are able to assess
the dangers which can result while operating the equipment.
Personnel without this training or persons who are in training
require thorough instruction. These operating instructions are
the basis.
2.3 Regulation use
The Mini Spray Dryer B-191 is conceived and built as a piece
of laboratory equipment. Its regulation use is to dry watery
solutions or suspensions in one operating process.
It is used for:
• Spray drying watery solutions or suspensions
• Micronisation
• Spray embedding and coating
• Structural transformation
Regulation use of the Mini Spray Dryer B-191 also includes its
care and careful handling of the apparatus on the basis of the
directions in these instructions.
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2 Safety BÜCHI Mini Spray Dryer B-191
2.4 Non-regulation use
Any uses other than those listed as well as any use which
does not correspond to the technical data is a misuse. The
operator bears sole risk for eventual damage related to such
use.
This laboratory apparatus is not suitable for operation in explosion-prone areas.
In particular the following uses are not allowed:
• Spray drying of organic solvents
• Processing of explosive substances
2.5 Fundamental dangers
Fundamental dangers arise from:
• Equipment which shows visible damage
• Extended storage in unfavorable conditions
• Mixtures of unknown composition or with impurities
• Damaged glassware
• Hot surfaces
• Folded hoses
• Inflammable gases or vapors in the immediate vicinity of
the apparatus
• Powdering, poisonous products while emptying the product
vessel
2.6 Safety measures
Regional and local laws and regulations must be observed.
In order to arrest electrostatic charges away from the Mini
Spray Dryer, the device is internally grounded. There is also
the possibility of arresting electrostatic charges away from
both the sample receiving vessel and the cyclone.
Operation of the Mini Spray Dryer should only occur with protection shield.
The wearing of personal safety equipment such as safety glasses, protective clothing is necessary.
The glass parts are to be visually checked regularly for possible
damage, stars, cracks.
The earthed conductor (protective conductor) should never
be disconnected. Otherwise their is the danger of electrical
shock.
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BÜCHI Mini Spray Dryer B-191 2 Safety
The operator is responsible for the instruction of his or her personnel. For this purpose these instructions can also be ordered
in other languages (see Chapter 1, Scope of delivery). These
instructions, as a component of the Mini Spray Dryer B-191,
should be available to the operating personnel at any time at
the location of use of the apparatus.
The operator is to inform the manufacturer immediately of all
safety-related incidents which occur during use of the product.
Modifications
Modifications are only allowed after consultation and written
permission from the manufacturer.
Only glass parts recommended by the manufacturer may be
used.
Only the specified parts of the Mini Spray Dryer meant for
functional performance may be installed and removed. This is
possible manually or with the supplied tool. The removal of
protective fixtures and covers with the aid of the usual tools
is forbidden, except by authorized repair and maintenance
personnel.
2.7 Safety elements
Heating:
• Excess temperature protection against uncontrolled overheating
• Automatic temperature control
Air:
• Negative pressure suction procedure
The suction procedure used in the Mini Spray Dryer B-191
produces a light negative pressure in the apparatus and
thus rules out, together with the intake filter and aspirator
filter, a contamination of the environment through leaking
from the apparatus.
Glass:
• Use of inert 3.3 borosilicate glass
• Electrically-conducting internal coating of the cyclone
• Screwable glass connections to prevent broken glass
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3 Function BÜCHI Mini Spray Dryer B-191
3 Function
The Mini Spray Dryer B-191 functions according to the parallel flow principle. This means that the sprayed product and
the drying air flow in the same direction.
3.1 Functional principle of the drying air
햲 Suction opening
햳 Heating
햷
햳
햴
햲
햸
햴 Flow stabilized inlet to the drying chamber
햵 Cyclone, the product is separated from the air current
here
햶 Aspirator
햷 Temperature probe air inlet
햸 Temperature probe air outlet
햹 Collecting vessel for the finished product
햵
Figure 2: Functioning principle of the drying air
햷
햵
햶
햴
햹
햳
햶
3.2 Functioning principle of product flow and the
spray nozzle
햲 Solution, emulsion or dispersion
햳 Peristalsis feed pump
햴 Product channel
햵 Connection for compressed air or inert gas
햶 Connection for cooling water
햷 Cleaning needle with swirl channel
The cleaning needle serves to push through the nozzle in
the case of eventual blockage by the product.
햲
Figure 3: Functioning principle of product flow and the spray nozzle
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BÜCHI Mini Spray Dryer B-191 4 Putting into operation
4 Putting into operation
Check that the voltage of the socket is the same as that
given on the apparatus plate.
The apparatus is supplied with an attached cable but without
a plug. The apparatus should be connected by an electrician
in accordance with local regulations.
4.1 Set up location
The apparatus must stand on a stable, horizontal base. It is
not to be used in explosion-proof rooms.
The dimensions of the Mini Spray Dryer are
Width: 50 cm
Depth: 60 cm
Height: 100 cm
Weight: 57 kg
Operating temperature: 5 – 40° C
햴
Figure 4: Functioning principle, air treatment plant
햳햲
4.2 Installation of the compressed air treatment
plant
In order that the Mini Spray Dryer achieves an optimal atomization performance, the supply of compressed air with a pressure
of 5-8 bar is necessary. The compressed air must be dried
and free from impurities (contamination of the product through
impure air). If there is no air treatment plant available, we
recommend the use of a WILKERSON maintenance unit
(see Figure 4), consisting of:
햲 Water separator
햳 Filter
햴 Activated charcoal filter
If there is no compressed air plant available, the compressed
air can be taken from compressed air bottles or produced
with an oil-free air compressor with an output of 5-8 bar as
required (see Chapter 1, Optional accessories). In the case of
compressed-air bottles care should be taken that they contain
compressed air exclusively and no inflammable gases.
Because of the variety of coupling types for compressed-air
bottles, we supply only the apparatus-side couplings (Order
code 04366).
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4 Putting into operation BÜCHI Mini Spray Dryer B-191
햴
햳
햲
햶
햵
햸
햷
Figure 5a: Glass assembly
햶
햹햺
Figure 5b: Coupling part, complete
4.3 Installation of glass parts
Care is to be taken that only glassware in perfect condition is
used, which shows no cracks, stars or other damage. The
glassware is to be checked visually before the initial putting
into operation of the apparatus.
The glass parts are already mounted on the apparatus in the
packaging.
1. The spray cylinder 햲 is held in position by means of the
sprung clamping device 햳.
2. Care is always to be taken that the rubber gasket 햴 is fitted correctly during the installation of the cylinder.
3. The temperature probe PT-100 햵 must be inserted in the
opening provided in the coupling 햶.
4. The support 햷 must be pushed upwards in such a way
that the complete spray cylinder rests on top. The screw
joint for fixing the support in position should be lightly tightened by hand.
5. The separator 햸 is bolted down to the bottom end of the
spray cylinder with an SVL 42 screw cap.
6. The cyclone must be screwed onto the coupling with a
flange screw joint.
7. The glass elbow, which is attached manually, is located
on the cyclone.
8. The product receiving vessel is fastened on the bottom
end of the cyclone. The anchor clamps provided are sufficient as mounting.
9. The earthing cable must be installed in the socket connector
provided on the cover of the product receiving vessel and
connected to the housing.
10. When assembling the coupling part, the teflon piece 햹 is
inserted with the rectangular shoulder and the fitted contact
ring 햺 first. The slanting shoulder is connected to the spray
cylinder. The centering bolt is supplied in order to fit the
flanged nut tight.
Figure 6: Product feed hose and peristalsis pump
8
4.4 Installation of the product feed hose
1. In or to be able to install the product feed hose, the rollers
of the hose compression pump (peristalsis pump) must be
raised from the working surface. This is possible by opening
the holding device with the tilting lever.
2. The product feed hose (silicon hose 4x2 mm) is now pulled
through the holder until the nipple integrated in the hose is
at the opening.
3. The hose is now laid between the rollers and the working
surface without tautening.
4. The working area is pressed to the rollers by lifting the
orange tilting lever.
5. The observation window must now be installed in front of
the pump for the safety of the operator.
6. The pump bed (working area) should be lowered by operational interruption and stoppages in order to protect the
hose.
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BÜCHI Mini Spray Dryer B-191 4 Putting into operation
4.5 Installation of the spray nozzle
햵
1. Insert the spray nozzle 햲 in the opening provided in the
햳
heating oven and connect product feed hose 햳.
2. Then close housing cover 햴 in order to continue further
햴
installation.
3. Screw the compressed air tube 햵 on the nozzle.
햲
4. In order to reduce warming of the product in the nozzle,
cooling water (tube diameter 5 x 3 mm) can be connected
to the nozzle. Care must be given that the cooling water
inlet is labeled with “E” and the outlet with “A”. Only when
connected in this manner can optimal cooling of the product be guaranteed.
Figure 7: Nozzle and product feed hose
햵
햲
햴
Figure 8: Intake filter
4.6 Installation of the intake filter
The intake filter consists of a tube 햲, a housing 햳 and a filter
element 햴 which filters fine dust particles from the aspirated
air and thus prevents a contamination of the sprayed product
with particles from the air. The flexible connecting tube makes
possible an optimal placement of the filter and is connected
to the air suction supports 햵 of the B-191. The tube can be
secured with the supplied clamp.
햳
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4 Putting into operation BÜCHI Mini Spray Dryer B-191
4.7 Installation of the aspirator filter
The aspirator filter, consisting of a woven polyester fabric (type
911-400), prevents dustiness and the possible blocking of the
aspirator by very fine particles which can not be separated in
the cyclone. In the case of extreme soiling of the filter sack,
this can be washed by hand or machine. The filter is delivered
with all connections.
Care is to be taken by installation that the air which is to be
cleaned flows through the filter sack from the outside to the
inside. The manometer is thus attached to the aspirator side
of the filter sack and shows the negative pressure which comes
about on account of the soiling of the filter by fine particles.
The easy installation allows retrofitting on every apparatus.
Figure 9: Aspirator filter
4.8 Installation of the compressed air
Compressed air is necessary for the spray process, so that
an even spray cone of the product can be achieved in the
spray cylinder. For this purpose, 5-8 bar pressure should be
available.
If the apparatus be supplied with pneumatic nozzle cleaner,
this changes installation in so far as the air must pass through
the control unit of the nozzle cleaner before entering the apparatus.
Figure 10: Compressed air line
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BÜCHI Mini Spray Dryer B-191 4 Putting into operation
4.9 Installation of the automatic nozzle cleaner
For products which tend to clog the nozzle during the spray
process, the cleaning of the nozzle can be automated.
1. Install the complete control unit with the angle piece on
the rear panel as illustrated. The short screws are for
mounting the angle piece on the housing and the somewhat longer screws are for mounting the control unit on
the angle piece. The compressed air hose must first be
removed if the control unit is being retrofitted.
2. Screw the supplied double nipple into the apparatus-side
compressed air connection.
3. Install the connecting hose 쎻 between the control unit
and the installed double nipple 쎻.
4. Connect the control unit with the attached power supply
cable to the receptacle on the back of the apparatus.
5. Now connect the black connecting hose to the nozzle on
the control unit as illustrated. Loosen the screw cap and
then retighten to fix the hose in position.
6. Connect the central compressed air hose 쎻 with the control unit.
7. Open compressed air cock (5-8 bar).
8. Now set the nozzle pressure to 4.5 bar. The turning knob
can be turned by lightly pulling out and the nozzle pressure
of 4.5 bar can be set. Do not reduce pressure on the cen-
Figure 11: Automatic nozzle cleaner
tral pressure connection since the apparatus requires 5-8
bar air pressure for normal operation.
9. Turn control unit on. The action interval of the cleaning
needle from 1-10 seconds can now be selected by hand
with the rotary switch. For products which clog the nozzle
very quickly the interval must be kept very small.
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4 Putting into operation BÜCHI Mini Spray Dryer B-191
4.10 Installation of the pneumatic action cylinder
on the nozzle
1. Unscrew the push-button 쎻 for manual nozzle cleaning
from the nozzle.
2. Screw the adapter 쎻 with the damping ring 쎻 on the
needle shaft 쎻 and tighten well.
3. Care is to be taken before mounting the jaw that the hex-
socket screw which is there as an aid to disassembly is
loosened. Now insert the jaw 쎻 until it stops on the spring
guide.
4. The position of the compressed air hose should lie between
the two cooling water hoses.
5. There should be no space between the adapter and the
action cylinder.
6. The jaw is to be tightened after it successfully inserted.
7. The cylinder screw 쎻 with hex-socket head provided for
expansion in disassembly of the jaw 쎻 must be removed
when tightening the screw. This screw is only used for disassembly (expansion of the jaw) of the adapter.
Figure 12: Pneumatic action cylinder
4.11 Installation check
An installation check is to take place after successful installation
and before the first spray drying:
• Inspect the glass visually for possible damage.
• Check the electrical connections.
• The cover of the receiving vessel must be connected with
the apparatus by means of the cable for arresting electrostatic charges.
• The outlet temperature probe must be inserted in the
coupling.
• The apparatus is to be connected to the power supply
and operated only after these checks.
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BÜCHI Mini Spray Dryer B-191 5 Operation
5 Operation
Make sure that the apparatus has been put into operation in
accordance with Chapter 4, Putting into operation.
5.1 Layout of the operating and display elements
햲 Main switch
햳 Rotary switch for selection of air flow
헁
헂
햿
헀
헃
햻
햹
햺
햵
햶
햷
햲
햳
햴
햴 Inspection glass for air quantity
햵 Main switch, pump
햶 Main switch, aspirator
햷 Main switch, heating
햸 Main switch, pneumatic nozzle cleaner
햹 Main switch, magnetic stirrer
햺 Regulating push-button, pump
햻 Regulating push-button, aspirator
햽 Regulating push-button, heating
햾 Air flow regulation, “Sprayflow”
햿 Pressure selection adjustment, nozzle cleaner
헀 Nozzle cleaner interval adjustment
헁 LED display pump output in %
헂 LED display aspirator output in %
헃 LED display index values, input air temperature
헄 LED display actual value, input air temperature
헅 LED display actual value, output air temperature
헆 Flow meter for air flow rate in the nozzle (spray flow)
쎻 Manometer, nozzle cleaning pressure
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22
쎻 Manometer filter, aspirator output (only for aspirator filter)
Figure 13: Operating and display elements
Figure 14: Operating and display elements on
the pneumatic nozzle cleaner
햾
헄
햸
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5 Operation BÜCHI Mini Spray Dryer B-191
5.2 Spray process
1. Turn apparatus on using the main switch and open the
main compressed-air cock. The apparatus now carries
out an automatic self check and then goes automatically
into operating mode.
2. If the apparatus is provided with pneumatic nozzle cleaner
than the pressure in the manometer of the control unit
must display 4.5 bar. If this is not the case this must be
readjusted with the adjustment knob on the control unit.
3. Set air flow at about 600 l/h with the adjustment knob.
4. Preselect the desired input temperature with the adjust-
ment button.
5. Turn on the aspirator and set output with the adjustment
button. This output selection is an empirical value which
differs from product to product and can not be given.
6. Turn on heating and allow the system to warm-up. The
system regulates the input temperature itself. The LED in
the heating adjustment button only goes out when the
system temperature has stabilized. The LED is not a heating interval display.
7. If necessary, the nozzle cooling water and, if present, the
nozzle cleaner, are now turned on.
8. Distilled water is now slowly sprayed in by means of the
peristalsis pump. The spray cone now produced should
be located in the middle of the spray cylinder. If this is not
the case the nozzle may be dirty or defective.
9. The spray quantity of distilled water can be changed with
the adjustment button of the peristalsis pump. The spray
quantity in turn has an influence on the output temperature,
since the water draws energy from the air by evaporation.
In this way the output temperature can be set to the desired
value with the quantity of sprayed water and pump speed
of the peristalsis pump. Care is to be taken that the product
is not destroyed by a too high output temperature.
10. As soon as the desired operating conditions have been
achieved and are stable, the distilled water which is sprayed
in is replaced by the prepared product. Somewhat less
water is now sprayed into the system by the concentration
of the product in the water, which results in renewed adjustment of the output temperature (the pump output can
be slightly increased).
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BÜCHI Mini Spray Dryer B-191 5 Operation
11. The spray process should now be constantly monitored. In addition to constant temperatures, care should be
taken that the nozzle does not become clogged. If this
should happen, the nozzle must be cleaned immediately,
either manually or by increasing the cleaning interval of
the pneumatic nozzle cleaner. A clogged nozzle can lead
to the product feed hose bursting.
12. Product deposits on the glass parts can possibly be removed with light tapping.
Any change to the system and/or the spray parameters (increase in nozzle cleaning interval, change of air flow, etc.), no
matter how minor, can lead to a change in the physical properties of the product (dry content, particle size, etc.).
5.3 End of spray process
1. Distilled water should continue to be sprayed for a short
time at the end of the spray process, in order to remove
product deposits from the hoses and the nozzle.
2. Pump the hoses empty, turn off the peristalsis pump and
lower pump bed.
3. Turn off nozzle cleaner.
4. Turn off heating.
5. The system now cools down to the surrounding temperature by itself.
6. As soon as the temperature in the apparatus sinks below
70°C, the aspirator can be turned off.
7. The receiving vessel with the product can now be removed.
This should not be done when the aspirator is on since
there is the possibility that the air stream could blow the
product out of the receiving vessel into the surrounding
area.
8. The glass assembly, hoses and the nozzle should be cleaned with water after every spray process.
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5 Operation BÜCHI Mini Spray Dryer B-191
5.4 Fault elimination
Fault Possible cause Elimination
Not possible to switch on No power Plug in apparatus /
check plug for damage
Fuse “burned out” Change fuse (3.15 AT)
Peristalsis pump does not feed Rollers not touching working area Raise working area with lever
Set elevation height of working area
from below with hex-socket screw
Aspirator loud Soiling of aspirator Clean the aspirator
If no aspirator filter is fitted, one should
be installed in order to reduce further
contamination of the filter
System does not heat Heating not switched on Switch on heating
Intake index value is lower than Preselect intake temperature again
room temperature
Fuse Change fuse (12.5 AT)
Heating defective Contact customer service
Nozzle clogged Product too concentrated Pump lower concentration
Increase nozzle cleaning interval
Encrustment on nozzle outlet Cool nozzle with cooling water
opening
Product drips in spray cylinder No spray flow Open compressed-air cock
Too little spray flow Increase spray flow
Check air pressure in line (5-8 bar)
Insufficient aspirator output Aspirator filter clogged Remove and clean filter
Deposits on spray cylinder Nozzle not clean Completely disassemble nozzle and
clean with water
Nozzle defective (bent) Replace nozzle
Product does not dry Reduce temperature difference
between intake and output
Increase air flow (600 l/h)
Reduce peristalsis pump output
Input temperature over the Sink intake temperature
melting point of product
Deposits in cyclone Partially product-based No possibility for elimination
Static charge Plug in earthing cable
Product too moist Increase output temperature in order
to keep the product drier
Turn down aspirator output in order
to extend the product dwell time
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BÜCHI Mini Spray Dryer B-191 5 Operation
Fault Possible cause Elimination
Output temperature does not Probe not inserted Insert probe in coupling
increase
Decrease in input temperature Heating off Switch heating on
Fuse burned out Change fuse (12.5 AT)
Decrease in output temperature Heating off Switch heating on
Spraying too quickly Reduce feed output of peristalsis
pump
Peristalsis pump lever open Close lever
Increase in output temperature Nozzle clogged Clean nozzle by pressing the cleaning
button or by switching on the nozzle
cleaner
Increase nozzle cleaning interval
Reduce product concentration
Product hose defective Replace product feed hose
Hose not immersed in solution Immerse hose
Change of concentration in Stir product solution (magnetic stirrer)
solution in order to get an even concentration
No product feed Switch on peristalsis pump
Fault code display 000 Input temperature probe defective Contact customer service
Fault code display 001 Output temperature probe Contact customer service
defective
Fault code display 002 Temperature linearity defective Contact customer service
Fault code display 003 Aspirator tachometer defective Contact customer service
Table 3: Fault elimination
Customer service
The addresses of the official Büchi customer service centers
are on the last jacket page of these operating instructions.
Please contact these centers in case of faults, technical queries and use problems.
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6 Maintenance BÜCHI Mini Spray Dryer B-191
6 Maintenance
Follow all instructions aimed at keeping the Mini Spray Dryer
in a reliable operational state. This includes periodic cleaning
and inspection for noticeable damage.
Check that the plug has been pulled out and that the compressed air and cooling water are both switched off before
maintenance work on the apparatus.
6.1 Cleaning
The glassware is to be cleaned with the usual cleaning agents
(e.g. mild soap solution).
The housing is to be cleaned with a damp cloth without the
use of organic solvents and to be visually inspected for defects
(operating elements, plug). Defective apparatus components
are to be replaced.
6.2 Customer service
Repairs to the apparatus may only be carried out by authorized
service technicians. These are persons with a sound technical
training and knowledge of the dangers which result from not
observing safety regulations.
Authorized Büchi service centers have a special service manual available to them.
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BÜCHI Mini Spray Dryer B-191 6 Maintenance
6.3 Block diagram
Only the specified parts of the Mini Spray Dryer meant for
functional performance may be installed and removed.
This is possible manually or with the supplied tools. The
removal of protective fixtures and covers with the aid of
the usual tools is forbidden, except by authorized repair
and maintenance personnel.
Figure 15: Block diagram
If the Mini Spray Dryer must be moved, take care that the
plug is pulled, the compressed-air hose is no longer under
pressure and is uncoupled from the apparatus. In addition,
the glass assembly must be cooled off.
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7 Taking out of operation BÜCHI Mini Spray Dryer B-191
7 Taking out of operation
Dangerous substances must be removed and the apparatus
must be thoroughly cleaned. In this way any risk that persons
will be injured through contact with dangerous substances
will be eliminated.
7.1 Storage
The apparatus and accessories must be stored in a dry location.
7.2 Packing/transport
The original packaging is designed for the transportation of
the apparatus as well as the glass parts. Only the original
packaging is to be used for any possible further transport.
7.3 Disposal
So that the Mini Spray Dryer can be disposed of in an environmentally-correct manner, there is a list of the materials of the
most important parts, which are also provided with material
codes, in Chapter 9, Appendix. This guarantees that the parts
can be separated and recycled. We refer you to the corresponding guidelines for the disposal of electrical parts. In addition, regional and local laws are to be observed by disposal.
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BÜCHI Mini Spray Dryer B-191 8 Replacement parts
8 Replacement parts
Only original Büchi accessories and replacement parts guarantee safe use and reliable operation of the apparatus. The use
of other than Büchi replacement parts and accessories is
only allowed with the permission of the manufacturer. The replacement parts catalog may be used for purposes of assembly
and disassembly only in connection with the corresponding
Chapters 5 and 7 of the instructions. Inspection by and surrender to third parties as well as production in accordance
with this manual are forbidden.
Copyright remains with Büchi Labortechnik AG.
8.1 Replacement parts, basic apparatus
Glass assembly see Chapter 8.1 / 8.2 Replace-
ment parts, glass assembly
Spray nozzle see Chapter 8.3
Replacement parts, spray nozzle
Pneum. nozzle cleaner see Chapter 8.4 Replacement
parts, pneumatic nozzle cleaner
Intake filter see Chapter 8.5
Replacement parts, intake filter
Aspirator filter see Chapter 8.6
Replacement parts, aspirator filter
Peristalsis pump see Chapter 8.7 Replacement
parts, peristalsis pump
Figure 16: Replacement parts, basic apparatus
Aspirator motor 220 V / 50 Hz 27715
Aspirator motor 220 V / 60 Hz 27928
“Nyflex” PVC hose 14 / 8 04113
Neoprene hose 5 m Ø 4 / 7 04129
ICO compressed air quick connector 04155
Nipple (screw) 1/4” 8 mm 04156
Key 04338
Ventilation hose 44 mm / 3.7 m 16236
Filter housing cover 27198
Sample table 27618
Electrostatic arrester cable 27894
12,5AT 10 x fuses 29180
5AT 10 x fuses 33704
Peristalsis pump, complete 27689
Hose adapter 4/2 04251
21
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8 Replacement parts BÜCHI Mini Spray Dryer B-191
27689
4396
4178
8.2 Replacement parts, glass assembly, white
Screw cap SVL 42 03551
O-Ring Silicone 30 x 4.0 37179
4187
4190
Gasket SVL 42 x 30 mm PTFE 03575
Contact ring (D = 60 mm) 04166
27918
3551
37179
Contact spring 04167
Gasket 04178
Spray cylinder 04187
3575
Separator 04188
Cyclone 04189
3551
4189
Angle piece 04190
Sample holder 04191
4188
Y
X
4192
4237
4191
Cover gasket 04192
Clamp 13 / 32-52 mm 04237
Serrated lock washer 10717
Lip seal 20461
Figure 17: Replacement parts, glass assembly
M 3 x 8 screws 22492
Coupling 27647
27874
X
Intermediate ring 27648
Cover 27874
Glass set, complete 27908
Pin for screwing 27918
Flanged screw coupling 32014
20461
4191
Insert spring 32017
Air deflector kpl. 04396
Y
22
10717
22492
32017
4167
4166
32014
2764727648
8.2 Replacement parts, glass assembly, brown
Glass set, complete 27909
Angle piece, brown 04344
Cyclone, brown 04348
Product vessel, brown 04349
Spray cylinder, brown 04347
Separator, brown 04343
Page 23
BÜCHI Mini Spray Dryer B-191 8 Replacement parts
15688
04204
04203
04202
10699
04394
04218
04206 (0,7 mm)
04395
04244
04211
8.3 Replacement parts, spray nozzle
Spray nozzle 0.7 mm, complete 04364
Spring casing 04202
Pressure ring 04203
Spring 04204
Connecting fitting 6/4 04206
Nozzle cap 0.7 mm 04208
Screw cap 04209
Locking ring 04210
Jacket tube 04211
Mix needle 0.7 mm 04394
Coupling 04218
O-Ring Set 04352
Nozzle body with flange 04244
04210
04208 (0,7 mm)
04209
Figure 18: Replacement parts, spray nozzle
4374 4375
4245
4241
4240
4218
4365
17874
8.4 Replacement parts, pneumatic nozzle
cleaner
Pneumatic nozzle cleaner, complete 60 Hz 27905
Pneumatic nozzle cleaner, complete 50 Hz 04351
Adapter 04240
Jaw 04241
Action cylinder 04245
Polyurethane hose 04375
Connecting hose, complete 16915
16915
Figure 19: Replacement parts, pneumatic nozzle cleaner
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8 Replacement parts BÜCHI Mini Spray Dryer B-191
8.5 Replacement parts, intake filter
11243
11242
Intake filter, complete 11235
Filter with gasket 11238
11240
11239
11238
Figure 20: Replacement parts, intake filter
04190
16485
20461
16760
16759
16488
16484
(Typ 911.400)
04230
37179
03551
16486
04237
16483
16487
04230
03551
37179
04190
8.6 Replacement parts, aspiration filter
Aspiration filter, complete 16482
Hose tail 03094
Screw cap SVL 42 03551
Angle piece 04190
Apparatus hose 04230
Cover 16483
Filter sack 16484
Sealing ring 16485
Adapter 16486
Aspiration filter vessel 16487
Filter sack holder 16488
Manometer 16759
Clamp (D=62 mm) with rod 45 mm 16760
Lip seal 20461
Cross sleeve, complete 27344
O Ring Silicone 30 x 4 37179
04133
03094
Figure 21: Replacement parts, aspiration filter
24
Page 25
BÜCHI Mini Spray Dryer B-191 8 Replacement parts
8.7 Accessories
Protection shield, complete 27725
Compressor 27907
Magnetic stirrer 27940
Filter sacks (6 units) 35004
Spray nozzle 0.7 mm, complete 04364
Wilkerson compressed-air 04366
maintenance unit
25
Page 26
9 Appendix BÜCHI Mini Spray Dryer B-191
9 Appendix
9.1 Technical data
Apparatus type B-191
Connection voltage 230 V / 50 Hz (220-240 V)
220 V / 60 Hz
Power consumption 2900 Watt
Current consumption 14 A
Max. temperature 220°C
Max. drying output 1.5 kg water/hour
Max. air throughput approx. 60m3/h
Max. air throughflow approx. 30 m3/h
Compressed air for
sprayflow 5 - 8 bar
Compressed air for
nozzle cleaning 4.5 bar
Max. compressed air
consumption 800-900 l/h
Dimensions (l x h x d) 500 x 1000 x 600 mm
Weight 57 kg
Displays Index intake temperature (°C)
Intake temperature (°C)
Outlet temperature (°C)
Aspirator output (%)
Peristalsis pump output (%)
Negative pressure in apparatus (only with installed
aspirator filter)
Nozzle cleaning precompression (only with installed nozzle
cleaning)
Operating pressure range Atmospheric pressure
Table 4: Technical data
26
9.2 Materials used
Part Material
Glass 3.3 borosilicate glass
Filter sack Polyester
Protection shield Plexiglas
Seal Silicon
Table 5: Materials used
Page 27
BÜCHI Mini Spray Dryer B-191 9 Appendix
9.3 EC declaration of conformity
We Büchi Labortechnik AG
Post Office Box, CH-9230 Flawil
Switzerland
declare in general responsibility that the product
BÜCHI Mini Spray Dryer B-191
to which this declaration refers is in conformity with the following standards:
EN 292-1:1991
Safety of machines: Basic terminology method
EN 292-2:1991
Safety of machines: Technical basic principals and specifications
EN 60335-1:1988 (~IEC 335-1, VDE 0700-1 SEV 1054-1)
Safety regulations for household appliances
EN 55011:1991/B (~VDE 0875/B, VDE 0871/B)
Maximum permissible values and measurement methods for radio interference from industrial, scientific
and medical high-frequency devices
EN 50081-1:1992
Electromagnetic compatibility - Basic standard interference emission: HOME, business and commercial
areas as well as light industry
EN 61000-3-2: 1995/1996
Limits for harmonic current emissions
EN 61000-3-3: 1995
Limitation of voltage fluctuations and flicker
In accordance with the regulations of the EU guideline:
89/392/EWG Machine guideline
Flawil, 19th December 2000
BÜCHI Labortechnik AG
Meierseggstrasse 40
9230 Flawil
Schweiz
Tel +41 (0)71 394 63 63 Guido Worch
Fax +41 (0)71 394 65 65 Qualitymanager
buchi@buchi.com
www.buchi.com
27
Page 28
9 Appendix BÜCHI Mini Spray Dryer B-191
28
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