11
Movitec V 2,4,6,10,15 & 90
5.4
Operation
During centrifugal operation of the pump an negative
pressure is created at the inlet of the impeller. This
underpressure enables the medium to enter the pump
at the suction connection (A).
Every stage (B) consists of an impeller and diffuser.
The passage of this stage determines the capacity of
the pump. The diameter of the stages is related to the
centrifugal forces and its “stage pressure”: the more
stages, the more pressure.
This total capacity and raised pressure will be guided
to the outside of the pump, between the pump stages
and the outer sleeve (C) and the medium will leave
the pump at the discharge connection (D).
5.5
Measuring, draining and
venting
The pump is provided with plugs for measuring,
draining and venting.
Connection (E) is meant to drain the inlet part of the
pump. Or to measure the inlet / suction pressure
using a G ¼ connection.
Connection (F) is meant to drain the outlet part of the
pump. Or to measure the discharge pressure using a
G ¼ connection.
Connections (G) are meant to vent the pump system
when the pump is not in operation. Or to measure the
discharge pressure of the pump using a G 3/8
connection.
5.6
Working range
The working range depends on the application and a
combination of pressure and temperature. For
specific and detailed limits advice the working ranges
are described in the chapter 5.3: Modular selection.
The overall working range of the pumps can be
summarised as follows:
Table 5: Specification of the working range
ID3027
Figure 4: Movitec VF 90
2
0080
190-
A/2702
2008
D
A
E
F
G
G
B
C
Pump type
Movitec V
note
Ambient temperature [°C]
-20 up to 40
1
1.
If the ambient temperature exceeds the above value or
the motor is located more than 1000 m above sea
level, the motor cooling is less effective and could
require an adapted motor power. See table 9: Motor
load dep. sea level or amb. temp or please contact
your supplier for more detailed advice.
Minimum inlet pressure
NPSH
req.
+ 1m
Viscosity [cSt]
1-100
2
2.
Deviation in viscosity and/or density could require an
adapted motor power. Please contact your supplier for
more detailed advice.
Density [kg/m
3
]
1000-2500
2
Cooling
forced motor cooling
3
Minimum frequency [Hz]
10
Maximum frequency [Hz]
60
4
Allowable size of solids
pumped
5µm to 1mm
Goodnal STP ST041 Disinfection & Outfall (KSB ATF Feed Pump Skid PU-0700-110
Q-Pulse Id VM405
Active 29/10/2013
Page 13 of 41
