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4.1.4
Seal
4.2
Monitoring devices
Internal monitoring devices
Motor compartment/sealing chamber*
Motor winding**
External monitoring devices
Pre-chamber
Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3
Product description
Fluid temperature
Protection class
Insulation class
Number of poles
Max. switching frequency
Max. immersion depth
Explosion protection
Operating mode, immersed
Operating mode, non-immersed
Motor efficiency class
Housing material
* = motors in efficiency class IE4 are specified as "E4" in the motor designation.
** = depending on the motor type and motor capacity, fluid temperatures up to 60 °C
(140 °F) are possible.
The system is sealed by a 3-chamber system:
ƒ
Pre-chamber
ƒ
Gear chamber
ƒ
Sealing chamber
Pre-chamber
The large pre-chamber is filled with gear oil and absorbs fluid ingress through the seal on
the fluid side. A mechanical seal made of solid silicon carbide is used as the seal on the fluid
side. The mechanical seal also features a packing sleeve. The packing sleeve ensures a per-
manently corrosion-resistant fit for the mechanical seal. A rotary shaft seal made of FPM
(FKM) seals towards the gear chamber. The pre-chamber can optionally be monitored using
a pencil electrode.
Gear chamber
The gear chamber is filled with gear oil and ensures continuous lubrication of the planetary
gear and the gear bearings. A solid silicon carbide mechanical seal seals towards the sealing
chamber.
Sealing chamber
The large sealing chamber is filled with white oil and absorbs any leakage from the gear
chamber. A rotary shaft seal made of FPM (FKM) seals towards the motor.
Overview of possible monitoring devices:
o
o
o
•
•
•
o
o
o
TR...
3...40 °C (37...104 °F)**
IP68
H
4, 6, 8
15/h
20 m (66 ft)
ATEX, FM, CSA
S1
-
-
EN-GJL-250 (ASTM A48
Class 35/40B)
o
o
o
•
•
•
o
o
o
en-US
TRE...
3...40 °C (37...104 °F)
IP68
H
4, 6
15/h
20 m (66 ft)
ATEX, FM
S1
-
IE3/IE4*
EN-GJL-250 (ASTM A48
Class 35/40B)
o
o
•
•
o
o
13
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