Exhaust Fans: EM 50n
 EM50n
is a further development of the well-recognized and proven
EM50 and is the ideal
exhaust fan whenever extra high airflow capacity is required.
The unique propeller design is self-cleaning and allows the
highest efficiency to be reached, features which characterize
the high quality and excellent performance E-line product
segment.
The square fan housing and air conveyor (venturi) are made
of a strong galvanised sheet-steel. The 6-blade propeller
is statically and dynamically balanced for low noise and low
vibration. The propeller is available in stainless steel,
galvanised steel and precoated galvanised steel. The v-belt
pulley attached to the propeller is made of die-cast aluminium,
with reinforced ribs which will increase strength.
To improve aerodynamic efficiency, the fan has been developed
in Munters Euroemme's R&D lab. The test chamber has been
built according to ANSI / AMCA 210-85 Figure 15 specifications.
Construction details and air tightness have been verified
by personnel of the BESS Lab at the Agricultural Engineering
Department, University of Illinois - USA. All declared values
in this leaflet are measured and certified by BESS Lab (test
#02333 and #02332).
Propeller and shutter
 The
propeller is attached to a large v-belt pulley, featuring
a new and improved design, in which is embedded a double ball
bearing protected against water. The belt transmission ensures
low propeller rpm, which in turn entails high efficiency and
low energy consumption as well as low noise. The shutter is
made of galvanised steel for all models, which is stronger
than aluminium and plastic.
The fan shutter is tightly closed when the fan is not working,
preventing any air leakage through the fan. The patented centrifugal
system consisting of rotating weights, which are placed over
the system arms, hinders the shutter from being closed by
air pressure. This keeps the efficiency of the fan at a peak
at all times by maintaining the shutter fully and firmly opened.
The shutter does not have to be cleaned regularly as dust
does not affect its opening and closing movement. All the
plastic parts are made of black acetalic plastic with UV protection.
The motor slide has been given a special design which will
reduce stress on the motor bearings and the new high efficiency
electric motor results in a longer life time along with energy
savings. A special plastic support fixes the mesh, thereby
eliminating any vibrations.
Equipment
- Central hub and v-belt pulley are made from die-cast aluminium,
with reinforced ribs for prolonged lifetime
- Reduced stress on motor bearings
- Class A motor featuring excellent efficiency and low
energy consumption
- Each motor is individually tested for 100% quality control
- Fan housing and venturi made of strong galvanised sheet-steel
- Welded wire guards designed for easy maintenance fitted
with noise reduction supports
- Propeller is statically and dynamically balanced
- Shutters are made of pressed galvanised steel in order
to ensure highest strength
- Shutter bearings are maintenance free
- Patented centrifugal system permits an energy efficient
solution
- Dust-safe opening and closing
- Powerful springs keep shutters firmly closed when fan
is not operating
- Every fan is individually checked for quality
Curves refer to data measured on EM50n by Bess Lab.
 |
 |
| Em50n is equipped with a high efficiency
electric motor. |
V-blet pulley in a new and improved
design. |
Order Information
EM50n-X-X-X e.g., EM50n-b-2-wp-wm
- b : Code for electric motor according
to above table.
- 2 : Code for the type of propeller blades.
- Galvanised propeller blades.
- Precoated propeller blades.
- Stainless steel propeller blades.
- wp-wm : Options codes
- wp: Fan equipped with plastic CE
protection for belt and pulleys (on mesh side, standard
in Europe)
- np: Fan delivered without plastic
CE protection for belt and pulleys ( on mesh side, standard
outside Europe)
- wm: Fan delivered with pyramidal
shape mesh for CE protection on shutter side.
- nm: Fan delivered without pyramidal
shape mesh for CE protection on shutter side (standard)
Motor Specifications
EM
50n
Code |
Nominal power |
Type
phases |
Speed |
Frequency
[hz] |
Voltage
[V] |
Current
[A] |
rpm |
| [w] |
[hp] |
| a |
735 |
1.0 |
1 |
single |
50 |
230 |
5 |
1,380 |
| b |
735 |
1.0 |
1 |
multi* |
50 |
230 |
5 |
1,380 |
| c |
735 |
1.0 |
1 |
single |
60 |
220 - 240 |
5.7 |
1,700 |
| d |
735 |
1.0 |
3 |
single |
50 |
230 / 400 |
3.5 / 2 |
1,400 |
| e |
735 |
1.0 |
3 |
single |
60 |
230 / 400 |
3.5 / 2 |
1,700 |
| f |
880 |
1.2 |
3 |
multi* |
50 |
230 / 400 |
4.3 / 2.5 |
1,380 |
| g |
880 |
1.2 |
3 |
multi* |
60 |
230 / 400 |
4.3 / 2.5 |
1,600 |
| h |
1,100 |
1.5 |
1 |
single |
50 |
230 |
7.3 |
1,400 |
| i |
1,100 |
1.5 |
1 |
single |
60 |
220 - 240 |
7.3 |
1,700 |
| k |
1,100 |
1.5 |
3 |
single |
50 |
230 / 400 |
5.2 / 3 |
1,400 |
| l |
1,100 |
1.5 |
3 |
multi* |
50 |
230 / 400 |
5.2 / 3 |
1,380 |
| m |
1,100 |
1.5 |
3 |
single |
60 |
230 / 400 |
5.2 / 3 |
1,700 |
| n |
1,100 |
1.5 |
3 |
multi* |
60 |
230 / 400 |
5.2 / 3 |
1,670 |
| * Multi speed motors
must be regulated with auto-transformer which is not supplied.
|
Technical Specifications
| |
05 hp |
0.75
hp |
| Weight of fully equiped fan1 |
[kg] |
84 |
86 |
| Nominal propeller speed |
[rmp] |
365 |
430 |
| Airflow at 0 Pa1 |
[m3/h] [cfm] |
35,300 [20,760] |
40,800 [24,000] |
| Airflow at 20 Pa1 |
[m3/h] [cfm] |
31,500 [18,530] |
37,850 [22,260] |
| Airflow at 50 Pa1 |
[m3/h] [cfm] |
25,139 [14,800] |
33,293 [19,600] |
| Specific performance at 0 Pa1 |
[m3/wh] [cfm/w] |
34.5 [20.3] |
28.0 [16.5] |
| |
| Propeller diameter |
[mm] [inch] |
1,270 [50] |
| Number of blades |
|
6 |
| Number of shutter blades |
|
10 |
| Max. operating temperature |
[°C] [°F] |
50 [122] |
| IEC protective class of electric motor |
|
IP55 |
| Electric motor winding insulation grade |
|
F |
1 All values refer
to 3 phases 50 Hz single speed motor.
N.B Airflow data are measured at standard condition (20
°C, 1013 hPa). |
EM 50n
is developed and produced by Munters euroemme S.p.A., Italy.
|
