Direction Of Rotation - Wilo Drain SP Notice De Montage Et De Mise En Service

ENGLISH
=hydraulic efficiency at duty point

=differential temperature
v

Maximum flow vs lifting height
Hydraulic curves are given for a suction height of 1 meter. If
suction lift is higher than 1 meter then the maximum pump flow
will be limited as follows :
- ¾ of max flow if suction height is 3 m under suction flange level.
- ½ of max flow if suction height is 6 m under suction flange level.
See sketch below :
5.2.2.4 MAXIMUM ALLOWABLE SPEED AND NUMBER OF
STARTS PER HOUR
Maximum speed :
The maximum speeds are indicated in the table below. Maximum
allowable speed depends on critical speed of each impeller size and on
bearing bracket maximum allowable speed.
PUMP SIZE
40 ; 41 ; 42
50 ; 51 ; 80 ; 82
45 ; 46 ; 60 ; 61
45-4 ; 63 ; 68 ; 69 ; 83 ; 88 ; 100 ; 108
65 ; 66 ; 85 ; 105 ; 150
91 ; 121 ; 161 ; 201
180 ; 230
170 ; 220
Number of starts per hour :
Wait for pump full stop before starting up the pump again to avoid
damaging the motor and the pump.
Starting frequency depends on motor type. Ask manufacturer if
necessary.
A maximum of 6 starts per hour is recommended.
5.2.2.5 AUTHORIZED SPEED AND NUMBER OF STARTS PER
HOUR
Operating limits for contiuous duty at 50Hz :
Pump
size
40
45
50
If flow much higher than Q
60
10
MAXIMUM SPEED
RPM
Bi-bloc and Close-
bearing bracket coupled
variants pumps
4000
3600
3000
3600
3000
2400
2000
1600
1200
Continuous duty
YES
YES
YES
or if abrasive content is high,
BEP
choose bigger pump size.
If flow much higher than Q
63
If flow much higher than Q
68
If flow much higher than Q
80
If flow much higher than Q
83
If flow much higher than Q
88
If flow much higher than Q
100
If flow much higher than Q
108
If flow much higher than Q
65
85
105
121
150
161
180
If flow much higher than Q
201
If flow much higher than Q
230
If flow much higher than Q
170
220
300
5.2.2.6 TYPE OF HANDLED FLUIDS
The pump is used to handle clear or laden liquids with a maximum
viscosity of 500 cSt (mm²/s). For viscosity higher than 50cSt, the
discharge pressure, the flow and the hydraulic efficiency must be re-
calculated.
The solids content in the liquid should be limited to 80g/l with no
long fibers content. Dryness max = 8%.
Free passage depends on pump size:
PUMP
45 46
40 41 42
60 61
63
50 51 65 66 68 69
83
80 82
88 108
91
85 180
100 105 121
170
201 220
161
230
150
5.2.3

DIRECTION OF ROTATION

Serious damage can result if the pump is started or run in the
wrong direction of rotation.
Ensure that the direction of rotation is correct before first start-up or if
maintenance work has been carried out on the electric power supply.
or if abrasive content is high,
BEP
choose bigger pump size.
or if abrasive content is high,
BEP
choose bigger pump size.
or if abrasive content is high,
BEP
choose bigger pump size.
or if abrasive content is high,
BEP
choose bigger pump size.
or if abrasive content is high,
BEP
choose bigger pump size.
or if abrasive content is high,
BEP
choose bigger pump size.
or if abrasive content is high,
BEP
choose bigger pump size.
or if abrasive content is high,
BEP
choose bigger pump size.
YES
YES
YES
YES
YES
YES
or if abrasive content is high,
BEP
choose bigger pump size.
or if abrasive content is high,
BEP
choose bigger pump size.
or if abrasive content is high,
BEP
choose bigger pump size.
YES
YES
MAX GAP (mm)
14x19
Ø20
Ø17
Ø22
Ø25
Ø27
Ø32
Ø35
Ø37
Ø40
Ø45
Ø54
Ø57
Ø63
Ø72
72x50