G&G RPGG 20x50-EX Instruction manual

ROTARY FEEDERS
RPGG 20x50-EX
Manual for use

Document number: RPGG 20x50-EX
Manual version: v4
Date created: 02.04.2023

ABOUT THE INSTRUCTION ..................................................................................................................................1
CONTENTS
1ǀDELIVERY .......................................................................................................................................................2
PACKAGING AND DELIVERY CONTENT ............................................................................................................2
HANDLING OF THE VAN ..................................................................................................................................2
STORAGE BEFORE UNPACKING .......................................................................................................................2
2ǀTECHNICAL INFORMATION ............................................................................................................................3
PURPOSE OF THE DEVICE ................................................................................................................................3
IMPROPER USE OF EQUIPMENT......................................................................................................................3
MAIN PARTS ....................................................................................................................................................4
DESCRIPTION AND FUNCTIONS......................................................................................................................4
TECHNICAL DATA.............................................................................................................................................6
CONNECTION TO THE MAINS ..........................................................................................................................7
TYPES OF GEARBOXES .....................................................................................................................................7
NOISE...............................................................................................................................................................7
LABELS ON EQUIPMENT ..................................................................................................................................8
DECLARATION OF CONFORMITY......................................................................................................................8
3ǀSAFETY INFORMATION .................................................................................................................................9
GENERAL INFORMATION.................................................................................................................................9
OBLIGATIONS OF THE OPERATOR ..................................................................................................................9
STAFF REQUIREMENTS ....................................................................................................................................9
PROHIBITED ACTIVITIES.................................................................................................................................10
RESIDUAL RISKS .............................................................................................................................................10
4ǀINSTALLATION AND COMMISSIONING ......................................................................................................12
WORKING ENVIRONMENT.............................................................................................................................12
OPERATING SPACE.........................................................................................................................................12
AVAILABILITY..................................................................................................................................................12
INSTALLATION ..............................................................................................................................................12
CONNECTION TO THE ELECTRICAL NETWORK...............................................................................................13
PRE-COMMISSIONING CHECKS......................................................................................................................13
CONSUMPTION..............................................................................................................................................13
5ǀMAINTENANCE ............................................................................................................................................14
MAINTENANCE OF MECHANICAL PARTS.......................................................................................................14
MAINTENANCE OF ELECTRICAL PARTS..........................................................................................................15
REPLACEMENT OF SEALING BLADES .............................................................................................................15
REPLACING THE CLUTCH COVER ...................................................................................................................16
REPLACEMENT PARTS....................................................................................................................................16
LIFE ................................................................................................................................................................16
DISMANTLING AND DISPOSAL.......................................................................................................................17

6ǀDOCUMENTATION OF THE MANUFACTURER AND SUBCONTRACTORS .....................................................17
SUPPLIED DOCUMENTATION ........................................................................................................................17
7ǀWARRANTY CONDITIONS ............................................................................................................................17
WARRANTY CONDITIONS ..............................................................................................................................17
8 | LIST OF MAINTENANCE TASKS ...................................................................................................................18
9 | SPARE PARTSLIST ........................................................................................................................................19

ABOUT THE INSTRUCTION
PURPOSE OF
INSTRUCTION
The instructions are intended for the operator of the equipment and all persons
who come into contact with it.
contact during installation, operation and maintenance.
PLATINUM
INSTRUCTIONS
These instructions are valid for all supplied G&G-RP rotary feeders.
The differences in types are listed in the technical data.
SYMBOLS USED
IN INSTRUCTIONS
SYMBOL
IMPORTANCE
These symbols have the meanings of " WARNING" and " WARNING"
and indicate facts that may cause serious injury to the user and/or
damage to the equipment. They also draw attention to an important
instruction, feature, procedure or matter that must be followed
during
operation and maintenance of the equipment to comply with or take note of.
The symbol draws attention to an important action that must be
followed but which does not endanger health or cause damage to the
product.
The symbol highlights useful information related to the device
or its accessories.
The symbol is a reference to another chapter in this manual.
IMPORTANT
NOTICES
Please read these instructions carefully. Follow the instructions in this manual to
ensure not only ease of use, but also optimum use and longevity of the equipment.
Do not operate the equipment until you are thoroughly familiar with all the
instructions, prohibitions and recommendations contained in this manual.
The illustrations used in this manual do not necessarily correspond to reality; they
are intended to describe the main principles of the device. However, the texts,
drawings, photographs and other elements shown here are protected by
copyright. Any misuse or unauthorized copying is punishable.
The manual must be considered as part of the equipment and must not be
separated from it. Therefore, keep it for future reference.
RELATED
DOCUMENTATION
In addition to these instructions, further documentation is available from the
manufacturers of the installed components and is included with the equipment. A
full list of documentation is provided in the MANUFACTURER DOCUMENTATION
section
AND SUBCONTRACTORS.
CONTACT US
MANUFACTURER
In practice, there are also unforeseen situations that could not be included and
described in this manual. Therefore, always contact the manufacturer if you are
unsure of the procedure:
G&G filtration CZ, s.r.o.
Hrubínova 1903/9
664 51 Šlapanice
Czech Republic
T: [phone]
E: [email protected]
W: www.ggf.cz

1ǀDELIVERY
PACKAGING AND
DELIVERY CONTENT
The equipment is delivered as one complete unit, mounted on a standard shipping
pallet. It is wrapped with suitable foil and the areas susceptible to damage are
secured with paper reinforcement.
Upon receipt of the equipment, check for damage to any part or packaging and report any
damage to the carrier immediately. In addition, check that the delivery is complete and that
it agrees with the order or packing slip. Report any shortcomings immediately.
contractors.
The following is included:
- transport pallet
- complete equipment according to the operator's specification
- a delivery note indicating the exact configuration of the equipment
- instructions for use
- manufacturers' manuals for selected components
- connecting screws
HANDLING OF
THE VAN
Use a forklift or lifting device with adequate lifting capacity to handle the packed
equipment. The weight of the equipment supplied is indicated in the technical
data sheet.
Lift the load with the lifting device and transport it to the designated unpacking or
storage location.
The delivered equipment may only be transported in the position in which it was stored by
the manufacturer. Under no circumstances may it be transported in any other position -
there is a risk of serious damage to the components.
We recommend that the lifting equipment and load are handled by persons who are qualified
to do so.
STORAGE BEFORE
UNPACKING
If you are not going to unpack and install the equipment immediately after delivery,
store it under the following conditions:
- store the equipment in its original packaging in dry areas, protected against
weathering that could cause damage to the packaging and deterioration
- do not dismantle the device from the pallet and do not tip it on its side or lean it
in an inclined position
- Do not place any other objects or materials on top of the packaged equipment
Recommended storage site characteristics:
Temperature:-5 °C to +50 °C
Humidity :<60%
Air cleanliness: Dust-free
environmentOther: Dry storage areas
Unpacking and transporting the equipment to the installation site is described in t h e
chapter INSTALLATION AND REPLACEMENT.

2ǀTECHNICAL INFORMATION
PURPOSE OF THE
DEVICE
RPGG rotary feeders are designed as stand-alone devices, intended for
transport of loose or fibrous dust. The most common applications include:
- removal of dust from filtration systems
- removal of materials from storage silos
- dosing of materials into pneumatic transport
- closure of the snail transport route
RPGG rotary feeders can also be used as a protective system to separate the
explosion hazardous zone from the non-explosion hazardous zone. Depending
on the design, they can be used in hazardous areas Zone 20, Zone 21 and Zone
22 - see the section EXPLOSION OF EXPLOSION ZONES for an explanation.
Their design and properties make them suitable for use in various industries,
including the food industry.
More precise specification of individual versions is given in the chapter DESCRIPTION AND
FUNCTIONS.
IMPROPER USE OF
EQUIPMENT
RPGG rotary feeders must not be used for purposes or under conditions other
than those specified above. Furthermore, it is forbidden to operate them with
components other than those with which they were supplied.
Rotary feeders must not be operated in a range other than that specified in this
manual.
Improper use of the feeder includes installation and maintenance by an
untrained or unauthorized person, operation with a malfunction or defect, and
operation with disassembled or modified covers.
If it is found that the equipment has been installed or serviced by an untrained
or unauthorized person, or has been used for purposes other than those for
which it was originally intended, or has been operated in violation of applicable
standards, general regulations, end user's internal regulations, or in violation of
this manual, all warranties on this
facility.

MAIN PARTS
The illustration below is a sample model of a rotary feeder.
The supplied models consist of the same components, differing only in the
shape of the casing and the motor mount.
1
Cabinet
4
Electric motor holder
7
Electric motor with gearbox
2
Bearing (front)
5
Rotor
8
Engine terminal block
3
Fastening screws
6
Fastening screws
DESCRIPTION AND
FUNCTIONS
RPGG rotary feeders consist of a housing, a rotor and an electric motor
with the transmission. A speed sensor can be added as an option.
Construction
The cabinet consists of front and rear side panels with a bearing and left and right
shells. Rotor,
mounted on the shaft by means of bearings located outside the conveyed material
space, it is equipped with blades with flexible endings. This ensures tightness and
separates the two independent pressure environments. In the case of protective
systems, the blades thus prevent the transmission of the dangerous effects of
explosions, pressure waves, flames and sparks. The rotary motion of the rotor is
provided by an electric motor with gearbox and clutch. The material to be
transported is uniformly carried in the direction of free fall.
Run cycling
The rotary feeder is cycled by the technology operator of the conveying system in
which the feeder is installed.
Working conditions
RPGG rotary feeders are designed for the conveyance of loose or fibrous dust with
a maximum particle size of 50 mm.
The temperature of the material to be conveyed must be between -20 °C and +55
°C. The rotary feeder can be installed in an environment with a temperature range
of -20 °C to +40 °C. The filling of the rotary feeder is designed to be 50% of the
total volume of the feeder.

Version
RPGG rotary feeders are available in A, B, C, D and food grade versions.
Version A:
Rotary feeder in normal design, with sealing vanes, with standard clutch, gearbox
and standard motor.

Version B- ATEX - protective system:
Rotary feeder type RPGG 200x200-EX . .. RPGG 300x600-EX with rotor with
polyurethane blades is a protective system designed as a blast-resistant design. It
prevents the transmission of blast effects such as pressure waves, flames and
sparks up to the maximum permissible blast pressure pexmax in both directions of a
divided space containing a hazardous atmosphere of combustible industrial dusts,
excluding metallic dusts. Combustible dust is described by the explosion
parameters KSt,max, MIE and MIT. The minimum thickness of each fixed blade is 6
mm, the minimum thickness of each adhesion blade is 4 mm and the thickness of
each polyurethane (PLASTON A90 material) blade is 6,5 mm. The polyurethane
rotor blades must not create any clearance between the rotor (8 blades) and the
rotary feeder housing. The minimum radial and axial overlap of the polyurethane
blades is given in the table below. The rotary feeder type RPGG 20x50-EX shall
function as a protection system according to the requirements given in the table
below:
Minimum overlap
PU blades [mm]
Type / size
KStmax *
[Bar.m.s ]-
1
pexmax
[Bar]
Maximum
rotor
speed
[ot.min ]-1
Radial
Axial
RPGG 200x200-EX
0,90
14
RPGG 200x300-EX
RPGG 200x400-EX
RPGG 200x500-EX
0,70
19
RPGG 300x300-EX
RPGG 300x400-EX
RPGG 300x500-EX
RPGG 300x600-EX
200
0,60
15
27
15
for Kstmax = 200 Bar.m.s-1 ... MIE ≥13 mJ; MIT ≥430 °C (dust cloud)
Design C- ATEX - non-electrical equipment:
Inside of the rotary feeder type RPGG 20x50-EX corresponds to EPL Da, outside of
the device corresponds to EPL Db or EPL Dc. The rotor speed of the feeder as a
non-electrical device only shall be < 1 m/s. Feeders in version C can discharge bulk
materials up to a maximum temperature of +55 °C. The feeder shall be equipped
with sealing vanes, clutch and motor with gearbox, which shall meet the
requirements of the relevant safety standards.
Version D:
Rotary feeder as a protection system + non-electrical device for
explosion hazardous environment, is a combination of design B and C.
Food grade:
Rotary feeder in food-grade design that can be combined with all versions A to D.

Zones of
explosiveness
for the money
TECHNICAL DATA
ZONE 20
A space in which an explosive atmosphere consisting of a cloud of animal dust is in
the air continuously, for a long time, or frequently. The occurrence of an explosive
atmosphere is
> 1 000 hours/year.
ZONE 21
An area in which the occasional occurrence of an explosive atmosphere consisting
of a cloud of animal dust in the air is likely. The occurrence of an explosive
atmosphere is
> 10 hrs/year and < 1000 hrs/year.
ZONE 22
An area in which the formation of an explosive atmosphere consisting of a cloud of
animal dust in the air is unlikely, and if an explosive atmosphere is formed, it will
be present only rarely and only for a short p e r i o d of time. The occurrence of an
explosive atmosphere is
< 10 hrs/year.
Flange dimension
Height
Rotor diameter
Shaft diameter
Number of rotor blades
Rotor speed
Motor power input
Maximum
transport performance
Rated transport capacity
75 %
MODEL
ROTARY FEEDER
mm
mm
mm
mm
mm
ks
min-1
kW
m /hr3
m /hr3
RPGG 20-20
200
200
360
300
45
8
14
0,75
4,4
3,3
RPGG 20-30
200
300
360
300
45
8
13
0,55
6,1
4,6
RPGG 20-40
200
400
360
300
45
8
13
0,55
8,2
6,2
RPGG 20-50
200
500
360
300
45
8
13
0,55
10,2
7,7
RPGG 30-30
300
300
500
440
45
8
14
0,75
15,7
11,8
RPGG 30-40
300
400
500
440
45
8
13
0,55
19,5
14,6
RPGG 30-50
300
500
500
440
45
8
13
0,55
24,4
18,3
RPGG 30-60
300
600
500
440
45
8
13
0,55
29,2
21,9
EXPLANATION
OF EXPLOSIVE
ZONES

Transmission
P085BR10C0-TB3
Value
Unit
Engine speed
1400
rpm
Output speed
21
rpm
Output torque
289
Nm
Power input
0,97
kW
Voltage
230/400| 50 Hz
V
TYPES
TRANSMISSION
CONNECTION TO
THE MAINS
Transmission: 400 V / 50 Hz
A detailed description of the electrical network parameters is given in the
instructions prepared by the electric motor manufacturer and included in the
delivery of the rotary feeder.
Transmission
SK9012.1AZD- 80SPTF
Value
Unit
Engine speed
1420
rpm
Output speed
13
rpm
Output torque
406
Nm
Power input
0,55
kW
Voltage
230/400| 50 Hz
V
NOISE
Sound pressure level LpA: 63 dB(A)
The sound pressure level LpA is measured at a distance of 1 m from the device when
connected to the technology on both sides. However, the measured value does not include
contributions from the surrounding machinery, so in case of higher overall noise levels, we
recommend that people working in the vicinity of
feeders use hearing protection.

LABELS
ON
EQUIPME
NT
Example of a nameplate - ATEX version
Other labels
Direction of rotation
Danger of injury
The device is designed
for operation in an
environment
with explosion hazard
SUBSCRIPTIONS
ABOUT THE
AGREEMENT
Declaration of conformity is supplied in separate documentation, delivered with
the rotary
feeder. In the case of the product in ATEX version (RPGG 20x50-EX) it will be
delivered
EU Declaration of Conformity.

3ǀSAFETY INFORMATION
GENERAL
INFORMATION
It is primarily the responsibility of the operator to ensure their personal safety
when operating the equipment
a person designated by the operator. The manufacturer of the equipment is
not responsible for personal injury or damage to the equipment and
environmental damage caused b y not being used and operated in accordance
with the instructions for use and applicable safety regulations.
The rotary feeder is designed in accordance with international standards and
regulations applicable to the manufacture of such equipment. The electrical
components of the feeder comply with international regulations on protection
against dangerous contact voltages. All the electrical elements either have the
appropriate enclosure as prescribed by the standard or are located in
enclosures which meet the enclosure requirements.
regulation of these standards.
OBLIGATIONS OF
THE OPERATOR
The company implementing the rotary feeder in its technology, or the rotary
feeder operator, must ensure the following:
- must clearly define the scope of responsibilities and competencies of the
personnel designated
for mounting and connecting the rotary feeder to the conveyor technology
- before putting the equipment into operation, ensure that all those who come
into contact with it can thoroughly familiarise themselves with the contents
of the instructions for use
- must ensure that the spatial arrangement of the installation does not
endanger the operation
and the activity of transport technology operators
- must take care to protect the health of workers installing the equipment and
assign t h e m appropriate personal protective equipment (PPE)
STAFF
REQUIREMENTS
Qualification of personnel for the installation of the rotary feeder:
Training in mechanical engineering - a knowledgeable person, i.e. a person with
the appropriate technical education, training and/or experience to recognise
and avoid the hazards that may occur when handling and installing a rotary
feeder.
Qualification of personnel to connect the electrical system to the parent
control system of the transport technology:
Education in the field of electrical engineering according to the relevant
legislation of the country of the operator, knowledge of the control system of
the transport technology used.
Dress code:
During the assembly of the rotary feeder, the designated personnel must use
appropriate personal protective equipment according to general regulations,
internal regulations and the nature of the work to be performed, such as
fireproof and dielectric work
Suit, work boots with reinforced steel toe, gloves, helmet, safety glasses, ear
protectors, etc.

PROHIBITED ACTIVITIES
- it is forbidden to modify the equipment in any way without the
manufacturer's knowledge
- it is forbidden to remove or damage the labels on the equipment
- it is forbidden to allow maintenance and servicing by persons who are not
competent to maintain and service this type of equipment
- it is forbidden to use the equipment if it is found to be defective
RESIDUAL RISKS
The equipment and its parts are designed so that, when used properly, they will
operate in
in perfect technical condition did not endanger the health of workers and did
not cause economic damage to surrounding facilities. Nevertheless, during
installation and maintenance of the equipment, situations may arise which are
a source of danger to the user if he is not aware of them and does not observe
the principles of safe work. These hazards are so-called residual risks - they are
risks that remain even when all preventive and protective measures have been
considered and implemented.
HAZARD: Electric shock during installation, maintenance or servicing of
electrical parts of the equipment. Electric shock when persons touch parts that
have become live due to a fault in the electrical equipment.
PROTECTION: Wiring, maintenance and servicing of electrical parts of the
equipment must only be carried out by designated and properly trained
personnel with appropriate qualifications.
HAZARD: Crushing of body parts or bumping while handling the equipment
during installation. Injury due to slips, trips and falls of persons on edges or
other parts of the equipment during installation or maintenance.
SAFETY: Always pay the utmost attention to the work you are doing and follow
safety regulations. Wear the prescribed personal protective equipment. Make
sure that any person involved in installation or maintenance is familiar with
each step of the installation.
DANGER: Burn on parts of the equipment that get hot during operation.
temperature.
PROTECTION: Do not touch the device until the temperature has dropped
properly. There is a risk of burns. Wear protective gloves.
HAZARD: Explosion due to non-compliance with the maximum temperature of
filtered particulates in the case of explosive dusts or mixtures.
PROTECTION: Before using a rotary feeder in an explosive environment, it is
essential to become familiar with the nature of the solid contaminants and to
follow the recommendations of the manufacturers of these substances for
explosion or auto-ignition protection.

SPECIAL CONDITIONS
USES - ATEX
The rotary feeder type RPGG 20x50-EX is designed for transporting combustible
industrial dusts, except for metal dusts with the parameters specified in chapter
2 TECHNICAL INFORMATION.
- Design pressure of rotary feeder type RPGG 20x50-EX: 1 Bar.
- Maximum temperature of the conveying medium Tmedium for RPGG *x*-EX: ≤
55 °C.
- Maximum holidays Speed of the rotor of the feeder Type
RPGG 20x50-EX
only as a non-electrical device with EPL Da/Db or EPL Da/Dc :<1 m/s.
- The rotary feeder must be installed in operation in such a way as to prevent
creeping discharges on the outer surfaces of the feeder.
- After connecting the rotary feeder to the user's technology, the correct
conductive connection of the feeder to the user's technology must be
checked before the device is started for the first time.
- The user must supply a device which, in the event of detection of an
explosion, ensures automatic and immediate stopping of the rotary feeder
- Explosion detection equipment and automatic and immediate stop of the
feeder is not covered by this certificate.
- If a coating system is to be applied to the internal parts of the rotary feeder
(rotor, body), it must be tested for a breakdown voltage of 4 kV. In the case of
repair of the coating system, the existing coating must be completely sanded
off and a new coating of the maximum thickness defined by the manufacturer
of the coating system must be applied. The existing coating system MUST
NOT be overcoated!
AFTER THE EXPLOSION:
In the event of a n explosion, the rotary feeder must be removed
from the technology and checked by the manufacturer.
DURING REGULAR INSPECTIONS:
In the event of damage to any of the sealing vanes or measurement of minimum
radial or axial overlap of the sealing vane (see chapter 2 TECHNICAL
INFORMATION), replace it according to the procedure in chapter 5
MAINTENANCE.

4ǀINSTALLATION AND COMMISSIONING
WORKING
ENVIRONMENT
To maintain proper operation of the feeder, the following environment must be
provided:
- altitude up to 2 000 m
- relative humidity in the workplace 20-80 % without condensation
- ambient temperature -20 °C to +40 °C
- explosion-free working environment around the rotary feeder
OPERATIONAL
SPACE
When selecting the installation location, take into account the dimensions of the
device as specified in the technical data. Ensure that the chosen location provides
sufficient space for the safe installation of the equipment on the transport
technology and for any subsequent maintenance or
Service.
AVAILABILITY
When unpacking, proceed as follows:
1Remove the screws securing the device to the pallet and remove the packaging
material.
Dispose of used packaging material according to the operator's internal regulations.
2Visually check that no parts of the device have been damaged during
transport. Report any defects to the supplier or carrier as soon as possible.
Rotary feeders are delivered without preservation, so there is no need to unpack them
unpreserve.
INSTALLATION
1Check that the prepared flanges on your conveyor technology dimensionally
match the rotary feeder housing (especially the spacing for the screws).
2Apply commercially available silicone sealant or sealing tape to the flanges of
your transport technology on both sides of the holes. Allow the sealant to dry
for approximately 30-45 minutes. Follow the sealant manufacturer's
instructions.
3Rotate the feeder and slowly and carefully place it between the flanges of the
technology. Take care not to damage the applied sealing layer.
During installation, the rotary feeder can be left on the transport pallet and picked up on site
using a forklift.
If the rotary feeder can only be lifted by a lifting device (crane, etc.), screw the lifting lugs
into the holes in the corners of the feeder housing.
When lifting the feeder, follow the relevant standards and the operator's internal
regulations. Always use personal protective equipment such as work boots when handling
the equipment.
with reinforced tip, protective gloves and protective helmets.
4Screw the flanges to the rotary feeder housing with the screws provided.

CONNECTION
TO THE
ELECTRICAL
NETWORK
Before connecting to the mains, check that the mains supply has the correct
parameters to ensure the rotary feeder's performance. Check that the mains
voltage and frequency corresponds to the information on the electric motor's label.
Ensure that the supply cable is not live.
Wiring should be done according to the instructions for the electric motor, see
MANUFACTURER AND SUBCONTRACTOR DOCUMENTATION. The wiring diagram for
the electric motor is also shown in the motor terminal cover.
The wiring must comply with the applicable standards in the country of the operator and
varies individually according to the system in which the rotary feeder is integrated.
In any case, the equipment must be earthed and all parts must be conductively connected.
Unexpected start-up must be prevented for the equipment according to the applicable
national standards of the country
operator and shall be equipped with a lockable shut-off device.
There must be an emergency stop button within reach of the operator.
PRE-
COMMISSIONIN
G CHECKS
Check:
- Tightness of connecting flanges
- that the feeder is connected to the technology by both flanges so that fingers or
objects cannot be inserted into the feeder rotor area during operation
- Correctness of the direction of rotation of the electric motor
CONSUMPTION
The operation of the rotary feeder is dependent on the control system of the
conveying technology
and launch depends on how it is integrated into your transport technology.
Therefore, this manual does not describe how to start the rotary feeder.

5ǀMAINTENANCE
Always turn off the rotary feeder first and allow the hot surfaces to cool before performing
any maintenance or inspection. We also recommend securing the feeder against
unexpected start-up.
If the rotary feeder discharges hazardous substances, always use appropriate personal
protective equipment according to the nature of the hazardous substance.
MAINTENANCE OF
MECHANICAL PARTS
MONTHLY:
Check the bearings (1) and the rotor shaft (2) for abnormal sounds or noise,
overheating or discolouration.
-In the event of malfunction, ensure that the bearing or shaft bearing elements are
replaced.
Add grease to the bearings (1).
-Use PM-LV2 EP grease or equivalent.
QUARTERLY:
Check the rotor sealing vanes (3) for leaks and damage.
-Measure the clearance between the housing liner and the sealing blade, which
must be 0 mm. Also check if any blade is visibly damaged. In case of damage,
replace the blade according to the procedure in the chapter REPLACEMENT OF
SEALING BLADES.
HALF YEAR:
Clean the entire rotary feeder with a broom or industrial vacuum cleaner so that
no dust or dirt remains on it.
For equipment intended for ZONE 22 and ZONE 21, it must be ensured that the layer of
settled dust never exceeds the permissible thickness of 5 mm! Regular cleaning must be
prescribed and observed
layers of settled dust.