Wilo Wilo-Drain SP, Installation And Operating Instructions Manual

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ENGLISH
10

=hydraulic efficiency at duty point

v
=differential temperature

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
MAXIMUM SPEED
RPM
Bi-bloc and
bearing bracket
variants
Close-
coupled
pumps
40 ; 41 ; 42 4000
50 ; 51 ; 80 ; 82 3600
45 ; 46 ; 60 ; 61 3600
3000
45-4 ; 63 ; 68 ; 69 ; 83 ; 88 ; 100 ; 108 3000
65 ; 66 ; 85 ; 105 ; 150 2400
91 ; 121 ; 161 ; 201 2000
180 ; 230 1600
170 ; 220 1200
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
Continuous duty
40 YES
45 YES
50 YES
60
If flow much higher than Q
BEP
or if abrasive content is high,
choose bigger pump size.
63
If flow much higher than Q
BEP
or if abrasive content is high,
choose bigger pump size.
68
If flow much higher than Q
BEP
or if abrasive content is high,
choose bigger pump size.
80
If flow much higher than Q
BEP
or if abrasive content is high,
choose bigger pump size.
83
If flow much higher than Q
BEP
or if abrasive content is high,
choose bigger pump size.
88
If flow much higher than Q
BEP
or if abrasive content is high,
choose bigger pump size.
100
If flow much higher than Q
BEP
or if abrasive content is high,
choose bigger pump size.
108
If flow much higher than Q
BEP
or if abrasive content is high,
choose bigger pump size.
65
If flow much higher than Q
BEP
or if abrasive content is high,
choose bigger pump size.
85 YES
105 YES
121 YES
150 YES
161 YES
180 YES
201
If flow much higher than Q
BEP
or if abrasive content is high,
choose bigger pump size.
230
If flow much higher than Q
BEP
or if abrasive content is high,
choose bigger pump size.
170
If flow much higher than Q
BEP
or if abrasive content is high,
choose bigger pump size.
220 YES
300 YES
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 MAX GAP (mm)
45 46 14x19
40 41 42 Ø20
60 61 Ø17
63 Ø22
50 51 65 66 68 69 Ø25
83 Ø27
80 82 Ø32
88 108 Ø35
91 Ø37
85 180 Ø40
100 105 121 Ø45
170 Ø54
201 220 Ø57
161 Ø63
230 Ø72
150 72x50
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.