20
MIETZSCH GmbH Lufttechnik Dresden
Großenhainer Str. 137
01129 Dresden
Fax (0351) 8 58 00 74
http://www.mietzsch.de
10000
1,0
0,5
2,0
2000 3000
5000
ρ
= 1,2 kg/m³
.
V / m³/h
V / m³/s
10,0
4,0
3,0
5,0
30000
20000
.
∆
p / Pa
t
950
710
1450 U/min
2000
1000
60
300
200
100
400
500
3000
η
=
0,
80
m
ax
Radial fans of plastic material
VRE 450 / 731
Impeller with backward curved vanes
PERFORMANCE
PRINCIPAL DIMENSIONS
The principal dimensions refer to elastic
connectors on inlet and outlet and for
housing position 90R.
Height of axis is identical for all housing
positions.
Further dimensions see page 27.
Number of
vibration absorbers
: 4
(in case of heavy motors 6)
Drawings in format dxf
--> MIETZSCH-CD
MOTOR VERSIONS
for standard motor 3~400V/50Hz
(Data for other motors, such as polechanging or Ex, upon inquiry.)
Working range
- stable regime in entire characteristic
range
- fan can be operated beyond
characteristic specified
- parallel connection possible, series
connection after consultation with the
manufacturers
Design features
- welded impeller with 8 vanes curved
backward
speed 1450rpm with FRP-impeller
- welded spiral casing
- motor outside the flow conveyed
- robust sheet metal base, zinc-coated
- vibration absorbers in range of
delivery
- variant connectors of casing
power
nom. motor nom. motor
weight
fan type
speed
required
power
current
with motor
L
A3m
L
WA
rpm
kW
kW
A
kg
dB(A) dB(A)
63
125 250 500 1000 2000 4000 8000
VRE 450/731W710
710
0,87
1,1
2,9
162
57
75
62
68
72
69
65
63
60
56
VRE 450/731W950
950
2,08
2,2
5,2
167
63
81
68
72
78
75
70
67
65
60
VRE 450/731W1450 GfK
1450
7,48
7,5
15,1
196
72
90
77
80
88
84
79
76
73
64
GfK - impeller made of fibre reinforced plastic (FRP)
L
A3m
= A - weighted sound pressure level at distance of 3 m
L
WA
= A - weighted sound power level in duct
octave-band L
WA-Okt
/ dB(A)
i_v
re_
en
(
09/
06
)
884
max.1375
Ø 450
Ø 4
5
0
454
97
4
62
4
790
503
84
5
539
40
(33
)
