Asse mbl y
38
WBV.PU.002.EN VX215QD V2.0
6.7
System control
Controls
We recommend our control system, which is specially designed for use with the pump
in order to provide
optimum service life for the pump
. All connections necessary for connecting the pump to a control system
are available.
If a new control is made by a switching system manufacturer, the new manufacturer must make the network
connections in AC4.
Please contact us with regards to the correct programming of the control system
.
Automatic mode requires monitoring equipment
Machines that are operated in automatic mode must be equipped with a temperature and pressure
monitoring system. This monitoring equipment can be obtained from us as an option.
Variable frequency drive operation
In general, rotary lobe pumps can be used in variable frequency drive operation.
Advantages:
•
Adaptation to operating conditions (viscosity, delivery rate, NPSH
avail.
)
•
Wear compensation
•
Speed-proportional delivery rate (see characteristic line)
•
Increasing acceleration and deceleration times
Reduces pressure peaks
Reduces the risk of pipe vibrations
A variable frequency drive with a linear torque characteristic line is to be used.
The starting torque / nominal torque ratio must be > 1.3.