SIEMENS
FLENDER Standard Couplings
Fluid Couplings — FLUDEX Series
13/3
Siemens MD 10.1 · 2015
General information
13
Materials
Blade wheel and housing
Cast aluminum AlSi10Mg or AlSi9Mg
Shaft and hollow shaft
Steel with a yield point higher than 400 N/mm
2
Static seals and radial shaft seals
Perbunan NBR or Viton FPM
Add-on parts
Grey cast iron EN-GJL-250, spheroidal graphite cast iron
EN-GJS-400 or steel
Fusible safety plugs
If a FLUDEX coupling is operated with an impermissibly high slip
for a prolonged period, the oil filling and the coupling housing
will overheat. Fusible safety plugs which release the oil filling into
the environment upon reaching a preset temperature are there-
fore fitted in each coupling housing. These protect the coupling
from irreparable damage through overheating or overpressure
and disconnect the drive motor from the driven machine.
Thermal equipment
1)
Not available for size 222.
Suitability:
1
=
Suitable for continuous coupling operation temperatures
up to 85 °C
2
=
Suitable for continuous coupling operation temperatures
up to 110 °C
Thermal switching equipment
By adding thermal switching equipment leakage and loss of the
hydraulic fluid as well as a risk to and contamination of the envi-
ronment in the event that the coupling overheats can be
avoided.
The thermal switching equipment does not work if a machine
side is blocked and the coupling housing is connected to this
side. If the coupling is stationary, the switching pin cannot actu-
ate the switching equipment.
The thermal switching equipment comprises the thermal switch
and the switchgear.
The switchgear comprises a limit switch with a make-and-break
contact and a swiveling cam. Limit switch and cam are mounted
on a common base plate. The thermal switch is screwed into the
housing in place of a screw plug. The fusible safety plug (with a
higher response temperature) remains in the coupling for addi-
tional safety.
If the set temperature is exceeded, the switching pin is released
from the fusible element, emerges 10 mm from the housing and
actuates the switchgear while the coupling is rotating. The
switchgear can cut out the drive motor and/or trigger an optical
or acoustic alarm signal.
The housing of the coupling remains closed and no operating
fluid will escape.
Assignment
From coupling size 297, the thermal switching equipment can be used up to a peripheral speed of 50 m/s. At higher speeds, an EOC
system should be provided.
Equipment
Suit-
ability
Fusible safety plug
Sealing
material
Additional
order info
"-Z"
with order code
1
110 °C
NBR
F01
FPM
F05
Standard
1
140 °C
NBR
–
1
140 °C
FPM
F07
2
160 °C
FPM
F08
ATEX
1
110 °C ex
NBR
F02
FPM
F06
With ther-
mal switch
1)
1
140 °C + thermal
switch 110 °C
NBR
F03
FPM
F10
2
160 °C + thermal
switch 140 °C
FPM
F11
With
transmitter
1)
1
160 °C + EOC trans-
mitter (125 °C)
NBR
F04
2
FPM
F12
Incl. switchgear
F25
Incl. sensor and evaluation instrument
F26
Continuous operat-
ing temperature
Thermal switch
Fusible safety plug
≤
85 °C
110 °C
140 °C
> 85 ° ... 110 °C
140 °C
160 °C
5
R
G_MD10_EN_00108
Striking area
Switchgear
Thermal switch
Size
297
342
370
395
425
450
490
516
565
590
655
755
887
Perm. speed in rpm
2500
2240
2100
2000
1900
1800
1650
1600
1500
1450
1250
1100
1000
Radius of travel R in mm
188
215
226
239
251
271
292
307
330
346
383
435
507
© Siemens AG 2015