45
180R9270 / IOM APP S 674 - v01 / 03.2013
Instruction
APP S 674 pumps
8
180R9276 / 521B1245 / DKCFN.PI.013.Z1.02 / 03.2013
4.3 APP S 674 21-38
Pumps size
APP S 674 3.0-3.5
APP S 674 5.1-9.0
APP S 674 21-38
Outlet min. pressure,
continuous
1)
barg
20
30
30
psig
290
435
435
Outlet max. pressure,
MAWP
barg
80
80
80
psig
1,160
1,160
1,160
Inlet operating pressure
2)
barg
0.5-10
2.0-10
2.0-10
psig
7.25-145
29-145
29-145
Inlet design pressure
barg
15
15
15
psig
217
217
217
Min. speed, continuous
rpm
700
700
700
Max. speed, continuous
rpm
3,000
1,800
1,500
Media temperatur
3)
°C
2-50
2-50
2-50
°F
36-122
36-122
36-122
Ambient temperatur
°C
0-50
0-50
0-50
°F
32-122
32-122
32-122
Storage temperature
°C
-40 to +70
-40 to +70
-40 to +70
°F
-40 to +158
-40 to +158
-40 to +158
Weight
Kg
15
40
110
lb
33
88
242
Inlet pressure:
If using lower inlet pressure than stated in above
table, the pump will cavitate, which will damage
the pump.
The inlet line connection must be properly
tightened as entrance of air will cause cavitation.
Outlet pressure:
MAWP (Maximum Allowable Working Pressure)
must be within specifications.
If pump operates below minimum outlet
pressure, it may cause cavitation/erosion in the
pump.
Note: We recommend that the pump unit
includes a pressure gauge at inlet and outlet.
Dry running:
When running, the pump must always be
connected with water supply in order to avoid
pump damage.
Disconnection:
If inlet line is disconnected from the water
supply, the pump will be emptied which will
cause dry running.
When starting up again, follow the bleeding
procedure described in section 4: Initial start-up.
1)
For lower pressure, please contact Danfoss High Pressure Pumps
2)
If inlet pressure exceeds inlet operating pressure, Danfoss recommends inspection of the pump and shaft seal
3)
Dependent on the NaCl concentration
5.
Technical data
Instruction
APP S 674 pumps
9
180R9276 / 521B1245 / DKCFN.PI.013.Z1.02 / 03.2013
6.
Operation
6.1 Temperature
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
NaCl vs. temperature
In case of lower operating temperatures, please
contact Danfoss High Pressure Pumps.
The chart below illustrates the corrosive
resistance of different types of stainless steel
related to NaCl concentration and temperature.
The APP S 674 pump is made of Super Duplex.
If the water pump is operated above the Super
Duplex line, always flush water pump with fresh
water at operation stop in order to minimise the
risk of crevice corrosion.
8.
Storage
When preparing the pump for long-term storage
or for temperatures below the freezing point,
flush the pump with an anti-freeze medium type
monopropylene glycol to prevent internal
corrosion or frost in the pump.
For furter information on anti-freeze media,
please contact Danfoss High Pressure Pumps.
Recommended procedure:
1.
Disconnect water supply to the pump.
2.
Through the lower bleeding plug, empty
the pump housing for water and close it
again.
3.
Connect the pump to a tank containing
anti-freeze additive. Connect a hose to the
inlet port of the pump and through
another hose return the flow from the
outlet port to the tank with anti-freeze
additives.
4.
Quickly start and stop the pump.
Make
sure that the pump does not run dry.
The
pump is now protected against internal
corrosion and frost.
For a long-term shutdown period, the SWRO
system including the pump must be flushed with
fresh water (permeate) to remove any salt.
It is recommended to make few turns on the
pump to flush it properly.
7.
Long-term shutdown