180R9288_AQ109686503100en-001301 | 49
© Danfoss | 2023.12
Operation guide
Installation, Operation and Maintenance Manual for PAHT 20-90 pumps
3.2 Direction of rotation
The direction of rotation is indicated by means of
an arrow at the label of the pump.
CCW (counter clock wise)
CW (clock wise)
3.3 Orientation
The pump can be mounted/orientated in any
horizontal position and it can be mounted/
orientated in the vertical position with the shaft
upwards. The pump cannot be vertically
mounted/orientated with the shaft facing
downwards.
3.4 Protection from too high system
pressures
The pump should be protected against too high
pressure by means of a pressure relief valve or a
bypass/unloading valve placed on the pressure
side.
The valve should be placed as close to the pump
as possible.
The opening characteristics of the valve must not
result in peak pressures higher than 200 barg
(2900 psig).
In
Out
In
Out
