Füllstandtechnik
GmbH
M LLET
DF
Rotary blade level indicators
Level limit switches for bulk goods
Examples of application
Index
Page
Silo Filling with pneumatic conveyor equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
_
02
Storage bin, Daily service vessels, Function LEDs with collar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
_
03
Textile silo, Dosing equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
_
04
Installation inside a container, Multiple filling level, Solids in liquids . . . . . . . . . . . . . . . . . . . . . . . .
_
05
Hopper, bin, industrial vacuum cleaner, Container . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
_
06
Screw conveyor, Discharge pipes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
_
07
Pressure vessel conveyor, Dryer, Aggressive materials, Level adjustment . . . . . . . . . . . . . . . . . . .
_
08
Filter, Vibration dampening, Mounting varieties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
_
09
Example of a plant for bulk goods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
_
10
Silo with 2 chambers one upon the other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
_
12
Silo plant - PVC, Silo plant - Plastics granule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
_
13
Bellow feeder, Wood shavings, Foil strips, Clamp couplings, Dairy couplings . . . . . . . . . . . . . . . .
14
Conveyor belt transfer, Discharge pipe vertical, Weather protection hood . . . . . . . . . . . . . . . . . . . .
15
Overview about types and applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
_
16
GasEx, Gas+DustEx . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
_
18
Gas+DustEx outgassing bulk goods, Gas+DustEx zone 0 inside . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Examples of application
04/13
© by MOLLET
DF-AB-01
01
M LLET
Silo
GmbH
Füllstandtechnik
Rotary blade level indicators
DF
Filling with pneumatic conveyor equipment
Weather protection hood
DF-SH
DF26
DF27
with pendulum shaft
with rope shaft
Filter resistance approx. 40 mbar
use approved level indicators for
deviating atmospheric conditions
full indicator
Appliance category
and options B
are allocated
to the zones
DF21
option
zone 20
full indicator from side
B1
zone 21
protection type
?
II 1/2D
demand indicator
zone 20
DF24
option
or
zone 21
with reinforced blade shaft
and support tube
B3
zone 22
protection type
?
II 1/3D
(no protection roof necessary)
up to 10 m
empty indicator
DF25
DF23
with reinforced blade shaft
with angled jib
Filling device with blocking valve, coupling and
swivelling lever with integrated limit switch of our
delivery program:
(no protection roof necessary)
001-0500
Silo overfill monitoring system
02
DF-AB-02
04/13
© by MOLLET
Examples of application
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
M LLET
GmbH
Füllstandtechnik
Rotary blade level indicators
DF
Storage bin, daily service vessels
Full- and demand indicator with signal lamp
Optical display of the filling levels
DF21...H2
Filter resistance approx. 40 mbar
install approved level indicators for
deviating atmospheric conditions!
Signal lamp, green
Option
H2
Signal lamps
approved for zone 22
zone 20
B3
option
or
zone 21
zone 22
protection type
?
II 1/3D
Carried out with longlife supra light LEDs.
Simply calibrating of the display function “full” / “empty” due to
changing of a jumper.
Appliance category
and options B are
allocated to the zones
001-0501
Function LEDs with collar
Collar for function LEDs
Option
Position of the function LEDs
LED, blue above
container “full”
H1
Collars
approved for zone 22
LED, yellow
indicator on
“voltage existing”
LED, green bottom
container “empty”
LED, red
“malfunction”
Option
D1
Symbol
sticker
001-0502
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Examples of application
04/13
© by MOLLET
DF-AB-03
03
M LLET
GmbH
Füllstandtechnik
Rotary blade level indicators
DF
Textile silo
DF11...W4
(Pendulum shaft)
Flanges for textile silos
Option
Filter resistance approx. 40 mbar
use approved level indicators for
deviating atmospheric conditions!
DF-MG2
DF-MF1
and
Flanges
approved for zone 20
DF11...TK3
Big surface of the measuring blade for light bulk goods
e.g.:
foamed plastics,
expanded rubber flakes,
feathers, downs etc.
DF11...TK
For heavy bulk goods you have to cut the blade on one side,
therefore you´ll get a smaller surface of the measuring blade and
less burden on the blade shaft.
001-0503
Dosing equipment
DF21...X1
For small hoppers and/or if exact filling
levels are demanded, a measuring
blade in X-shape is commended.
DF11...W1
The shaft W3 provides three possibilities to fix in different heights.
Therefore, by shifting the blade at the shaft, 3 different filling levels
can be adjusted.
001-0504
04
DF-AB-04
04/13
© by MOLLET
Examples of application
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
M LLET
GmbH
Füllstandtechnik
Rotary blade level indicators
DF
Multiple filling level indication
Installation inside of a vessel
DF21
DF21
100%
zone 20
Option
B2
In ATEX areas of zone 20
Option B2 choose:
80%
Ex type of protection ? II 1D
DF21
60%
zone 20
Option B2
40%
DF21
20%
Level indicator with
Option B2 are certified for
installation in zone 20 !!!
001-0505
001-0506
Solids in liquids
DF26
For vessels under
pressure
Option
P2
P7
-0.1 bar...10 bar or choose
-0.9 bar...10 bar
DF31
Sludges, granules,
sand, salt etc.
001-0507
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Examples of application
04/13
© by MOLLET
DF-AB-05
05
M LLET
GmbH
Füllstandtechnik
Rotary blade level indicators
DF
Hopper, bin, industrial vacuum cleaner
DF11
DF11
DF11
DF11
or complete installation
in the dust collector
001-0508
Container
DF27
with
Option
DF-SZ50
DF-AK50
or
(Quick couplings)
After filling process pull
out the full indicator and
close nozzle with blank cap
for the transport.
(Nozzle can be used for
ventilation while draining.)
Container or big-bag
DF27
Measuring blade X8
001-0509
06
DF-AB-06
04/13
© by MOLLET
Examples of application
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Füllstandtechnik
GmbH
M LLET
Rotary blade level indicators
DF
Screw conveyor
empty indicator
Use level indicators with measuring blade in X-shape.
(reacts quicker when “full” as a blade with onesided paddle)
DF23
In additon to that, depending on the conveying capacity of the screw conveyor, a higher
driving speed of the measuring blade can be choosen, e.g. 5 rpm. (short reaction time)
jam indicator
DF21
Due to high discharge quantities, the bulk goods will quickly drain off and
a faulty switching can occure at the empty indicator.
Use Option D3 = Signal delay - empty indication
001-0510
Discharge pipes
DF21
full indicator or
empty indicator
ATTENTION: This use in light bulk goods, with less conveying capacity and
regular delivery line only.
We recommend to install a protection roof or to set the blade out of
the discharge volume, as shown on page 9.
DF21
jam indicator, full indicator or
empty indicator
with large signal lamp
Option H8
DF21
jam indicator,
full indicator or
empty indicator
001-0511
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Examples of application
04/13
© by MOLLET
DF-AB-07
07
M LLET
GmbH
Füllstandtechnik
Rotary blade level indicators
DF
Pressure vessel conveyor
Dryer
DF28
For use in ATEX areas
with pressure decoupling bell housing
up to 10 bar
Temperature
decoupling
bell housing
DF21
DF21
up to 500 °C
Standard
P0 -0.5 bar...5 bar
Option
Option
P1
P6
E1
E2
E3
E4
E9
-0.5 bar...10 bar
-0.9 bar...10 bar
Option (ATEX)
P2
P7
Ex type of protection
-0.1 bar...10 bar
-0.9 bar...10 bar
also available with Ex type of protection
… +150 °C
… +200 °C
… +260 °C
… +500 °C
… +1000 °C (request)
? II 1GD / 2GD c IIC T X
(use control head with corresponding Ex type of protection)
? II 1GD / 2GD c IIC T X
(use control head with corresponding Ex type of protection)
001-0512
001-0513
Aggressive materials
Level adjustment
also available with Ex type of protection
? II 1GD / 2GD c IIC T X
(use control head with corresponding Ex type of protection)
DF31 for use in
DF28...HV
aggressive bulk goods
and/or aggressive gases
The level adjustment allows settings of
variable level heights.
DF31
3
2
DF31
001-0514
08
1
001-0515
DF-AB-08
04/13
© by MOLLET
Examples of application
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Füllstandtechnik
GmbH
M LLET
Rotary blade level indicators
DF
Mounting varieties
Filter
DF21
Temperature
decoupling
bell housing
up to 500°C
Installation in a “pocket” to protect
measuring blade and shaft from
too high loads.
DF28 … E4 ... KD
Level indicator for hot gases
and hot dusts
(e.g. ash with hot conveying air)
001-0516
DF24
Vibration dampening
Vibration dampening
Option DF-VD
Damps the transmission
of vibrations and shocks
at the level indicator
Mounting in thick silo walls
(e.g. silos of concrete) or to penetrate
thick stickings at the silo wall
DF22 … DF-VD
DF21
Vibrator
DF22 … DF-VD
Beater
001-0518
001-0517
Protection roof above the measuring
blade to protect the measuring blade
and the shaft from too high loads.
e.g. large and heavy bulk material
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Examples of application
04/13
© by MOLLET
DF-AB-09
09
Füllstandtechnik
GmbH
M LLET
Rotary blade level indicators
DF
Example of a plant for bulk goods
with rotary blade level indicators
001-0519
10
DF-AB-10
04/13
© by MOLLET
Examples of application
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Füllstandtechnik
GmbH
M LLET
Rotary blade level indicators
DF
Rotary blade level indicators are important devices in
plant construction and engineering
full indicator
demand indicator
empty indicator
alarm indicator
jam indicator
M LLET
Füllstandanzeiger mit Niveau
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Examples of application
04/13
© by MOLLET
DF-AB-11
11
Füllstandtechnik
GmbH
M LLET
Rotary blade level indicators
DF
Silo with 2 chambers one upon the other
Filling with pneumatic conveyor equipment
The device category
and options B are
assigned to the
zones below:
Further devices for a safe operation of silos:
MOLLET pressure detector
MOLLET Silo-Ex-Implo-Valve
and from our delivery program:
DF26
MOLLET Silo overfill monitoring system
with pendulum shaft
zone 20
zone 21
Filter resistance approx. 40 mbar
use
approved filling level indicators for
deviating atmospheric conditions !
Option
B1
Ex type of protection
W
II 1/2D
zone 20
DF23
DF26
zone 20
or
zone 21
Option
B2
Ex type of protection
W
II 1D
DF23
with reinforced blade shaft
Silo filling device with a blocking valve, a
coupling and a swivelling lever with integrated
limit switch of our delivery program:
(no protection roof necessary)
MOLLET silo-safe-system
001-0520
12
DF-AB-12
04/13
© by MOLLET
Examples of application
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Füllstandtechnik
GmbH
M LLET
Rotary blade level indicators
DF
Silo plant - PVC
full indicator
demand indicator
empty indicator
alarm indicator
Silo plant - plastic granulate
001-0521
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Examples of application
04/13
© by MOLLET
DF-AB-13
13
Füllstandtechnik
GmbH
M LLET
Rotary blade level indicators
DF
Bellow feeder
zone 20
and level indicator installed in the taper closure.
It´s not enough to have a taper closure with
type of protection IP6X.
A EC-type-examination Certificate
is necessary.
MOLLET provides the solution !!!
Rotary blade level indicators witch are Excertified for installation in
zone 20.
For ATEX-areas in
zone 20 choose
option B2
Ex type of protection
DF30
zone 20
? II 1D
zone 20
zone 20
option B2
001-0522
Clamp couplings,
Dairy couplings
Wood shavings, foil strips
DF26
Stainless steel
housing and
FDA-conform type
DF28A4...KD-FDA
with
Option
or
DF-KV50
DF-RV50
Special measuring blade
Option Y2
For use in:
Long fiber, wood shavings,
gauze, tinsel (strips of metal),
foamed plastic and foil strips,
sheets etc.
001-0518
14
DF-AB-14
04/13
© by MOLLET
Examples of application
001-0523
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Füllstandtechnik
GmbH
M LLET
Rotary blade level indicators
DF
Conveyor belt transfer
Cover
jam indicator
DF21...T1V
Level indicator to be installed
outside of the delivery line.
Conveyor belt I
Conveyor belt II
001-0524
Discharge pipe, vertical
Weather protection hood
Weather protection hood,
vertical installed.
jam indicator
DF21
Level indicator
installed out of
the discharge volume.
Weather
protection hood,
horizontal installed.
001-0525
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Examples of application
04/13
© by MOLLET
DF-AB-15
15
M LLET
GmbH
Füllstandtechnik
Rotary blade level indicators
DF
Type- and Application survey
E . , P2 , ... VD , ... HV , ... DS
E1 ... E4 high temperatures
E7 Appliance heating
E1 ... E4
Temperature decoupling bell housing
E7
Appliance heating
Bulk goods temperature
Ambient temperature
-40 °C
up to 1000 °C
up to +70
°C
Bulk goods temperature
up to -45
P2 high process pressure
°C
Ambient temperature
up to -40
°C
VD Vibration dampening for DF22
P2
VD
Area seperating element
Vibration dampening
DF22
up to 100
bar
Vibrator
Beater
HV Level adjustment for DF28
DS Annular gap flushing
DF28
R.DS
HV8 and HV9
Annular gap flushing and
overpressure enclosing
Level adjustment
3
detection
of diffrent
filling levels
2
1
16
DF-EKAT-03
04/13
© by MOLLET
Examples of application
adhesive, adherence
and humid bulk goods
Pressurized air /
Inert gas
very fine dust
by changing
process pressures
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
M LLET
GmbH
Füllstandtechnik
Rotary blade level indicators
DF
Type- and Application survey
B1 , B2 , P7 , ZTP7 , A3 , A4
B1 Application for DustEx
B2 Application for DustEx
B1
Level indicators with option B2
can be build in so that the rotary
blade as well as the control head
are situated within zone 20.
with A1 or A2
B2
zone 20 zone 21
with A1 or A2
zone 20
Dust
Dust
1D
1/2D
ZTP7 Zone seperating for GasEx
P7 high process pressure for DustEx
ZTP7
with A1 or A2
Zone separating element with
pressure decoupling bell housing
P7
with A1 or A2
Pressure decoupling bell housing
Process pressure
up to 100
Process pressure
bar
up to 100
bar
zone 20 zone 21
Dust
zone 20
zone free
zone 0
Gas+
Dust
hybrid
mixtures
and
1/-G 1/-D
1/2D
ZTP7 Zone seperating for GasEx
A3/A4 Devices for GasEx
ZTP7
with A3 or A4 and B1
Zone separating element with
pressure decoupling bell housing
A3 or A4 with B1
GasEx-housing
Process pressure
up to 100
zone 20 zone 21
zone 1
+
Dust
hybrid
mixtures
and
bar
zone 20 zone 21
zone 0 zone 1
2G 1/2D
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
+
Dust
hybrid
mixtures
and
1/2G 1/2D
Examples of application 04/13
© by MOLLET
DF-EKAT-04
17
M LLET
GmbH
Füllstandtechnik
Rotary blade level indicators
DF
DF28A3
or
DF28A4
combustible
gases
DF21A3
(zone 1)
DF21A4
or
combustible
gases
(zone 1)
zone 1
zone 1
Bulk goods
...A3 flameproof enclosured housing in aluminium
Ex type of protection
II 1D2G/2GD EEx de IIC T6 T70°C IP66
...A4 flameproof enclosured housing in stainless steel
Ex type of protection
II 1D2G/2GD EEx de IIC T6 T70°C IP66
001-0526
+
Dust
and
hybrid mixtures
combustible
gases
(zone 1)
zone 1
and
DF21A3
or
combustible
DF21A4
gases
(zone 1)
combustible
dust
DF25A3
or
zone 20
or
zone 21
zone 1
and
zone 21
DF25A4
All combinations of the temperature decoupling bell housing
with the pressure decoupling bell housing and
in combination with the zone separating element are possible.
18
DF-AB-16
04/13
© by MOLLET
Examples of application
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Füllstandtechnik
+
Dust
and
GmbH
M LLET
Rotary blade level indicators
DF
hybrid mixtures
outgassing bulk goods
DF28A3
or
DF28A4
combustible
gases
DF21A3
or
in a dust cloud
and in the air
DF21A4
zone 1
and
zone 20
or
zone 21
zone 1
and
zone 21
combustible
dust
Temperature decoupling bell housing
Ex type of protection
II 1GD / 2GD c IIC T X see under DF-AB-08
Pressure decoupling bell housing
Ex type of protection
II 1GD / 2GD c IIC T X see under DF-AB-08
+
Dust
and
001-0526
hybrid mixtures
if there is zone 0 inside
combustible
gases
(zone 0)
combustible
zone 0
and
zone 20
or
zone 21
zone 1
and
zone 21
DF21A3
or
gases
(zone 1)
DF21A4
combustible
dust
Zone separating
element
Option DF-ZT
Ex type of protection
II 1GD/2GD c IIC TX
The zone separating element Ex type of protection
is additional for use as a pressure decoupling
II 1GD/2GD c IIC TX
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846
Examples of application
04/13
© by MOLLET
DF-AB-17
19
Füllstandtechnik
GmbH
M LLET
Rotary blade level indicators
DF
Space for notes
20
DF-AB-18
04/13
© by MOLLET
Examples of application
MOLLET D-74706 Osterburken Tel. +49 6291 6440-0 Fax +49 6291 9846