Page 50 - 233423 - Exhaust Fans_Neat

ESI - Efficient Silent Inline Fan Operation and Maintenance Manual

Vibration Severity Chart
Vibration Frequency* - CPM

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
3 4 5 6 7 8 9 0 2 5 8 0 5 0 6
1 1 1 1 2 2 3 3
60 K
A
50 Values are for filtered E
readings taken on the P
40 bearing caps. - C
E
30 S
/
N
I

-

20 Y
T
I
K 15 C
A O
E L
Shut Down
P E
- V
O 10
T Rough N
- O
K 8 I
A 7 T
E A
P 6 R
B
- Slightly Rough
5 I
S V
L
I 4 0.80 IN/SEC
M

-

T 3 Fair
N
E
M
E 2 0.40 IN/SEC
C Good
A
L 1.5
P
S
I
D
1.0 0.20 IN/SEC
N Smooth
O 0.8
I
T 0.7
A
R 0.6
B
I 0.5 0.10 IN/SEC
V
0.4
0.3
0.05 IN/SEC
0.2
0.1
*Frequency corresponds to RPM when dynamic imbalance is the cause of vibration.
Guidelines for Interpreting the Classifications on the Severity Chart
Smooth: Alignment, balance and the integrity of the support Slightly Rough: Requires service. Continued use in this
structure must be near perfect and the vibration from sources condition will reduce equipment life. Monitor equipment for
other than the fan equipment must be low. deterioration.
Good: Requires reasonable care on installation, proper Rough: Requires service. Dangerous operating conditions for
foundation, good balance on the rotating components and fan equipment. Shut equipment down.
good alignment of the running gear. Shut Down: Do not operate fan equipment. Potential for
Fair: Fan equipment can operate in this region, but catastrophic failure.
imperfections are indicated.
1401 North Plano Road, Richardson, Texas 75081
Phone: 972.234.3202 ■ Fax: 972.497.0468 PENNBARRY 7