nash_elmo Industries GmbH
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Order No.: 610.44436.40.000
Subject to change
Edition 09/2003
Technical Data
Two-impeller design
Model
1-m measuring-surface
sound pressure level L
[dB (A)]
at 50 Hz:
at 60 Hz:
2BH7420-0..2.-. approx.
61
approx.
66
2BH7420-0..5.-. approx.
61
approx.
66
2BH7520-0..2.-. approx.
64
approx.
70
2BH7520-0..7.-. approx.
65
approx.
71
2BH7620-0..3.-. approx.
67
approx.
71
2BH7620-0..5.-. approx.
68
approx.
72
Three-impeller design
Model
1-m measuring-surface
sound pressure level L
[dB (A)]
at 50 Hz:
at 60 Hz:
2BH7630-0..6.-. approx.
77
approx.
80
Temperature increase
The information listed in the following tables
corresponds to the heating of vacuum
pump/compressor housings and the air exiting
compared to the ambient temperature during
operation with a permissible total pressure
difference and an air pressure of 1,013 mbar
[14.7 psi]. At lower air pressures these values
increase.
Single-impeller design
(at a frequency of 50 Hz)
Model
Temperature increase
∆
T [K]
∆
ϑ
[F]
2BH7210-0..1.-. approx.
52
approx.
126
2BH7310-0..1.-. approx.
61
approx.
142
2BH7310-0..2.-. approx.
81
approx.
178
2BH7410-0..1.-. approx.
90
approx.
194
2BH7510-0..1.-. approx.
93
approx.
199
2BH7510-0..2.-.
approx. 120 approx. 248
2BH7610-0..1.-.
approx. 118 approx. 244
2BH7610-0..3.-.
approx. 118 approx. 244
Single-impeller design
(at a frequency of 60 Hz)
Model
Temperature increase
∆
T [K]
∆
ϑ
[F]
2BH7210-0..1.-. approx.
61
approx.
142
2BH7310-0..1.-. approx.
61
approx.
142
2BH7310-0..2.-. approx.
86
approx.
187
2BH7410-0..1.-.
approx. 101 approx. 214
2BH7510-0..1.-.
approx. 111 approx. 232
2BH7510-0..2.-.
approx. 112 approx. 234
2BH7610-0..1.-.
approx. 124 approx. 255
2BH7610-0..3.-.
approx. 124 approx. 255
Two-impeller design
(at a frequency of 50 Hz)
Model
Temperature increase
∆
T [K]
∆
ϑ
[F]
2BH7220-0..2.-.
approx. 55 approx. 131
2BH7220-0..5.-.
approx. 74 approx. 165
2BH7320-0..5.-.
approx. 81 approx. 178
2BH7420-0..2.-.
approx. 89 approx. 192
2BH7420-0..5.-. approx.
121
approx.
250
2BH7520-0..2.-.
approx. 89 approx. 192
2BH7520-0..7.-. approx.
125
approx.
257
2BH7620-0..3.-. approx.
124
approx.
255
2BH7620-0..5.-. approx.
124
approx.
255
Two-impeller design
(at a frequency of 60 Hz)
Model
Temperature increase
∆
T [K]
∆
ϑ
[F]
2BH7220-0..2.-.
approx. 77 approx. 171
2BH7220-0..5.-. approx.
110
approx.
230
2BH7320-0..5.-. approx.
124
approx.
255
2BH7420-0..2.-.
approx. 80 approx. 176
2BH7420-0..5.-. approx.
117
approx.
243
2BH7520-0..2.-. approx.
102
approx.
216
2BH7520-0..7.-. approx.
110
approx.
230
2BH7620-0..3.-. approx.
126
approx.
259
2BH7620-0..5.-. approx.
128
approx.
262
Three-impeller design
(at a frequency of 50 Hz)
Model
Temperature increase
∆
T [K]
∆
ϑ
[F]
2BH7630-0..6.-.
approx. 120 approx. 248
Three-impeller design
(at a frequency of 60 Hz)
Model
Temperature increase
∆
T [K]
∆
ϑ
[F]
2BH7630-0..6.-. approx.
120
approx.
248
Tightening torques for screw connections
The following values apply if no other
information is available.
With non-electrical connections, property
classes of 8.8 and 8 or higher as per
DIN ISO 898 (DIN EN 20898 / DIN ISO 898)
are assumed.
Tightening torques for
non-electrical
connections
Thread
[Nm]
[ft lbs]
M4
3 ± 0.3
2.21 ± 0.22
M5
4 ± 0.4
2.95 ± 0.3
