McQuay MDB075B Manual page 37

The following table summarizes the pulley data, motor size used for the MDB series, as manufactured:
Model
50 Hz
V-pulley
(in.)
MDB 125B/BR 4.0
MDB 125C/CR 3.5
MDB 150B/BR 4.0
MDB 150C/CR 4.5
MDB 200B/BR 4.0
MDB 250B/BR 6.5
MDB 300B/BR 6.5
MDB 350B/BR 6.0
MDB 400B/BR 5.5
MDB 450B/BR 5.5
MDB 500B/BR 6.0
MDB 600B/BR 5.0
MDB 750B/BR 5.0
Model
50 Hz
Horizontal
(mm)
MDB 125B/BR 319
MDB 125C/CR 180
MDB 150B/BR 319
MDB 150C/CR 185
MDB 200B/BR 314
MDB 250B/BR 599
MDB 300B/BR 599
MDB 350B/BR 840
MDB 400B/BR 732
MDB 450B/BR 738
MDB 500B/BR 700
MDB 600B/BR 300
MDB 750B/BR 300
Motor pulley, Dm
60 Hz
Taper # V-pulley
(mm) (in)
80 4.0
85 4.0
80 5.0
71 5.0
80 5.0
90 4.0
95 4.0
125 5.0
106 4.5
112 N/A
150 4.0
132 N/A
140 N/A
Pulley Centre Distance, C
60 Hz
Vertical Horizontal
(mm) (mm)
340 319
- 185
340 319
- 185
330 314
623 599
623 599
870 840
782 732
768 738
751 700
490 300
490 300
MDB 125B BLOWER PERFORMANCE CURVE
A D B 12 5 B B LOWER P E R F O R M A N C E C U R V E
50
45
1.5kW
1kW
40
35.5
0.6kW
35
30
H
26.5
25
20
17.5
15
I N T E R N A L
ST A T I C
10
5
0
0 2000 4000
50 Hz
Taper # V-pulley
(mm) (in.)
80 8.0
80 6.5
75 8.0
75 8.0
75 7.0
85 12.0
80 12.0
95 12.0
95 13.0
N/A 12.0
100 12.0
N/A 15.0
N/A 14.0
Motor kW
50 Hz
Vertical
(mm)
340 1.5
- 1.5
340 1.5
- 2.2
330 3.0
623 4.0
623 4.0
870 5.5
782 5.5
768 7.5
751 11.0
490 11.0
490 15.0
Design
Requirement
r
System Curve
r
r
800RPM
700RPM
4500
6000 8000 10000
Flowrate, CFM
36
Blower pulley, Db
60 Hz
Taper # V-pulley
(mm) (in)
160 10.0
160 10.0
160 12.0
125 12.0
140 10.0
180 9.0
180 9.0
250 12.0
250 13.0
250 N/A
315 10.0
400 N/A
400 N/A
Motor RPM
60 Hz 50 Hz
1.5 1425
1.4 1425
1.5 1425
1.5 1430
3.0 1430
4.0 1440
4.0 1440
5.5 1445
5.5 1445
N/A 1445
11.0 1445
N/A 1450
N/A 1455
900RPM
12000
Taper #
(mm)
200
200
180
180
160
200
180
224
280
N/A
250
N/A
N/A
60 Hz
1730
1730
1730
1730
1725
1735
1735
1745
1745
N/A
1750
N/A
N/A