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Verfügbare Sprachen
Verfügbare Sprachen
Series HP 55
tm
(°C)
If the calculated "H" is positive, the pump can operate at a suc-
tion lift of maximum "H" metres head.
If the calculated "H" is negative, an inlet pressure of minimum
"H" metres head is required. There must be a pressure equal to
the calculated "H" during operation.
Example:
p
= 1 bar.
b
Pump type: HP 50-105.A, 50 Hz.
3
Flow rate: 16 m
/h.
NPSH (from contractual documents): 1.5 metres head.
H
= 3.0 metres head.
f
Liquid temperature: +60°C.
H
(from fig. 3): 2.1 metres head.
v
H = p
x 10.2 – NPSH – H
– H
b
f
H = 1 x 10.2 – 1.5 – 3.0 – 2.1 – 0.5 = 3.1 metres head.
This means that the pump can operate at a suction lift of maxi-
mum 3.1 metres head.
Pressure calculated in bar: 3.1 x 0.0981 = 0.30 bar.
Pressure calculated in kPa: 3.1 x 9.81 = 30.4 kPa.
2.4
Maximum inlet pressure
Paragraph 11.2 shows the maximum permissible inlet pressu-
re. However, the actual inlet pressure + pressure when the
pump is running against a closed valve must always be lower
than the "maximum permissible operating pressure".
If the system and the pumps are to be pressure-tested at a
pressure higher than that stated in paragraph 11.2, the pump
shaft must be locked to prevent axial movement.
2.5
Electrical data
See motor nameplate.
2.6
Frequency of starts and stops
Motors up to 4 kW:
Maximum 100 times per hour.
Other motors:
Maximum 20 times per hour.
2.7
Weights
Weights: See label on the packing.
Hv
(m)
150
45
40
140
35
30
130
25
120
20
15
110
12
100
10
8,0
90
6,0
5,0
80
4,0
70
3,0
60
2,0
1,5
50
1,0
0,8
40
0,6
30
0,4
0,3
20
0,2
10
0,1
0
– H
[metres head].
v
s
2.8
Sound level
Motor
[kW]
0.25
0.37
0.55
0.75
1.1
1.5
2.2
3.0
4.0
5.5
7.5
11.0
15.0
Fig.3
18.5
22.0
30.0
37.0
45.0
3. Installation
Care and attention to detail during installation are essen-
tial for a trouble-free operation. Incorrect procedures dur-
ing installation may create hazards for personnel or
property or lead to premature failure of the pump.
The pump can be installed vertically or horizontally, see fig. 4.
Ensure that an adequate supply of cool air reaches the motor
cooling fan. However, the motor must never fall below the hori-
zontal plane.
Arrows on the pump base show the direction of flow of liquid
through the pump.
To minimize possible noise from the pump, it is advisable to fit
expansion joints either side of the pump and anti-vibration
mountings between foundation and pump.
Isolating valves should be fitted either side of the pump to avoid
draining the system if the pump needs to be cleaned, repaired
or replaced.
50 HZ
60 Hz
L
L
pA
pA
[dB(A)]
[dB(A)]
<70
<70
<70
<70
<70
<70
<70
<70
<70
<70
<70
<70
<70
<70
<70
<70
<70
<70
<70
<70
<70
72
80
84
72
77
72
77
70
75
70
75
79
84
78
83
Tab. 2
Fig.4
17
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