Quattroflow Installation, Operation & Troubleshooting Guide
Rev. 0
Page 10 of 25
www.quattroflow.com
4
INSTALLATION
1.: Suction line
2.: Protection from
High pressure
3.: Outlet line
4.: Flow direction
4.1
Suction line
Make sure that the internal diameter from the suction line is large enough (typically equivalent with the
internal diameter form the pump connector). Flow velocities should typically be below 2 m/s. Consider larger
diameters for fluids with higher viscosities. Minimize the pressure drop in the suction line that can be caused
by e.g. complex valve installations, sensors, etc. Avoid high suction lift.
I
f hoses were used in the suction line, make sure that they do not collapse due to the negative pressure.
If these points are not considered, cavitation might occur which can result in heavily reduced
maximum achievable flow rate, strong pulsation, heavy noise and potentially damage of the
pump!
4.2
Outlet line
Please make sure that the outlet line is large enough (typically equivalent with the internal diameter form the
pump connector). If the inner diameter of the outlet line is too small, the pump performance is limited.
Make sure that the outlet pipe or hose is safe against high pressure.
4.3
Protection from high pressure
In order to protect the diaphragm from high pressure events (e.g. accidentally closed valves) we strongly
recommend installing either a pressure relief valve or a pressure switch in the outlet line that automatically
turns of the motor in case the maximum allowed pressure has been reached. Consider the technical
specification from the pump for the maximum allowed pressure.
A short too high back pressure can cause damage at the diaphragms. For this reason it is very
important to protect the pump from high pressure on the pressure line.
4.4
High inlet pressure
In case of high inlet pressure (e.g. due to high filling level of the feeding vessel) we recommend to install a
pressure reducing valve on the discharge side of the pump in case low flow rates need to be achieved. This is
necessary, because the fluid path through the pump is open in flow direction.
PSH
M
1.
2.
3.
4.
Figure 5 Exemplary set up for a Quattroflow pump.
