Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
9/14
Copyright © 2020 mvt AG, Port, Switzerland
3.2 Nozzle arrangement
So that material removal is achieved as effectively as possible, two nozzles on the 4-jet nozzle
head are set as Drive + and two nozzles as Brake
–
.
It is important that identical-size nozzles are always inserted diagonally opposite each other in
order to prevent any imbalance occurring during rotation (risk of injury). In other words, the two
Drive N must always be the same size and the two Brake Nozzles
–
must always be
the same size.
The Drive N must always be bigger than the Brake Nozzles
–
.
The available pump capacity should be split in the ratio of approx. 70% as Drive + and 30% as
Brake
–
.
The nozzle head must always rotate clockwise (looking from the lance towards the nozzle
head). If the head does not rotate, the material being cleaned could possibly be damaged
since the pressure against a single point will be too high. In order to start the nozzle head
rotating, it is important that the nozzles are paired as described above. If the head still does
not rotate, there might be a mechanical blockage or the bearing could be defective. Look at
the instructions in Section 4 'Malfunction / Rectification' below.
Example of nozzles fitted for a pump operating at 2500 bar and 21.58 l/min:
Ratio 70/30 =16.1 l/min for the Drive + and 5.48 l/min for the Brake
–
Drive N=8.05 l/min per nozzle = nozzle Ø 0.60
Brake Nozzles
–
=2.74 l/min per nozzle = nozzle Ø 0.25