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4.4.2 Belt drive coupling
Utilize pulleys with minimum diameter equal or major than the value indicated in the table below.
Warning : Do not use a hammer to mount the pulleys.
Use suitable equipment to mount the pulleys onto the blower and motor shafts.
Minimum allowed blower pulley pitch diameter
Size
Differential pressure ( mbar )
200
300
400
500
600
700
800
900
1000
45
80
80
80
90
100
106
112
118
125
65
80
80
80
90
100
106
112
118
125
85
100
106
112
118
125
132
140
150
160
105
112
118
125
132
140
150
160
180
200
125
118
125
132
140
150
160
180
200
225
145
125
132
140
150
160
180
200
225
250
Mount the drive belts
Produce belt tension by using the motor thrust screws in accordance with the values shown in the table
Belt
profile
Force F
[ daN ]
Diameter D
of smaller
pulley
[ mm ]
Costant E
SPZ
XPZ
2.5
95 – 125>
132
1.45
1.30
SPA
XPA
5.0
100 – 140
150 – 200
> 224
2.30
2.10
2.00
SPB
XPB
7.5
160 – 224
236 – 355
> 375
1.55
1.20
1.10
SPC
XPC
12.5
250 – 355
375 - 560
1.80
1.60
e = I x E / 100
Fig. 7
e = I x E / 100, where I is expressed in mm
Warning : Excessive belt tension could damage the blower and the motor
During this phase check the alignment of the pulley by using a scale as per Fig. 7
Secure the feet of the motor
e
F
I
Dp
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