29
180R9270 / IOM APP S 674 - v01 / 03.2013
Data sheet
APP S 674 pumps
10
521B1187 / DKCFN.PD.014.H2.02 / 03.2013
5.4.1 APP S 674 3.0-3.5 integrated flushing valve curve
5.4.2 APP S 674 5.1-9.0 integrated flushing valve curve
5.4.3 APP S 674 21-38 integrated flushing valve curve
5.4 Flushing valve characteristics
The diagrams show the flow characteristics of
the integrated flushing valve that allows the
water to flow from inlet to outlet when the pump
is not running.
Pressure drop [bar]
3.5
3
2.5
2
1.5
1
0.5
0
0
1
2
3
4
5
6
7
Kurver:
Måleopstilling:
P1
P2
0
0,5
1
1,5
2
2,5
3
3,5
0
1
2
3
4
5
6
7
ȴ
P [B
ar]
Flow [m3/h]
Trykfaldskurver, APP S 674 5.1 - 9.0
Flow [m
3
/h]
Pressure drop [bar]
Flow (m
2
/h)
6
5
4
3
2
1
0
Flow [m
3
/h]
0
0.5
1.0
1.5
2.0
2.5
Kurver:
Måleopstilling:
P1
P2
0
1
2
3
4
5
6
0
0,5
1
1,5
2
2,5
ȴ
P [B
ar]
Flow [m3/h]
Trykfaldskurve, APP S 674 3.0 - 3.5
Trykfald vs. Flow
Pressure drop [bar]
Pressure drop [bar]
0
0,5
1
1,5
2
2,5
3
Pre
ss
ure
d
ro
p [
ba
r]
Flow [m3/h]
Flushing valve characteristic
3.0
2.5
2.0
1.5
1.0
0.5
0
Flow [m
3
/h]
0
5
15
10
20
25
30
35
Data sheet
APP S 674 pumps
11
521B1187 / DKCFN.PD.014.H2.02 / 03.2013
7.
Motor requirements
6.
Corrosion
The chart below illustrates the corrosive
resistance of different types of stainless steel
related to NaCl concentration and temperature.
All wetted parts of the APP S 674 pumps are
made of Super Duplex.
If the water pump is operated at high salinity,
always flush the water pump with fresh water at
operation stop, in order to minimize the risk of
crevice corrosion.
316L
Super Duplex
80 º
C
70
60
50
40
30
20
100
160
1600
1000
16000
10 000
160000
100 000
CI -
ppm
NaCI
ppm
Duplex
The power requirements can be determined using one of the following guiding equations:
l/min × bar
16.7 × m
3
/h × bar
0.26 × gpm × psi
Required power =
[
kW
] or
[
kW
] or
× 1.34 [hp]
Calc. factor
Calc. factor
Calc. factor
1 hp
= 0.75 kW
1 kW = 1.34 hp
1 gpm = 3.79 l/min
1 l/min = 0.26 gpm
1 m
3
/h = 4.40 gpm
1 gpm = 0.23 m
3
/h
APP S 674 3.0-3.5
- Calc. factor: 485
APP S 674 5.1-9.0
- Calc. factor: 485
APP S 674 21-38
- Calc. factor: 504
Both power and torque requirement must be verified in order to determine the correct motor size
when the motor does not operate at nominal speed.