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4.3. Spraying tools (option)
The High pressure spray gun have been carried out with a grey handle.
Not spraying: release the lever in the handle.
Spraying: pressing the lever in the handle.
Spray security: slap the block-system out in the lever.
The machine is standard provides with a single spray lance.
Block-system
4.4. Set to work
After the taking in operation the pipe system comes stand automatic under pressure.
There arise a flow to the HP-pipe when there is a take-off.
The first pump has ten seconds necessary to bring the pipe under pressure.
When the pressure stays to low the second pump keeps up directly.
The switching off of the pumps happen as follows:
When the pressure of the working pressure is sufficient and the flow which is measured is too small in proportion
to the number of integrated pumps, a pump switches off.
If one presses on the stop button the pumps switch off directly.
The water tank is monitored ongoing by an analogous pressure measurement, by this measuring the PLC can
head up a magnetic valve when necessary to refill the tank.
The temperature of the water in the water tank is measured at the same time, so that these remain under the
maximum temperature of the pump.
By means of the screen of the PLC one can consult the measurement values, working hours and fault messag-
es. For this one must open the electrical cabinet. This can only happens by qualified personnel.
Before the first operation one must ensure that the water conduit has rinsed thoroughly.
Afterwards one must switch on the machine firstly some time without press on start, so that the water tank can
be filled. Pay attention that the water supply is sufficient (= higher than the flow of the Unit), and the required
water temperature is not exceeded. The working pressure is regulated by a by-pass valve.
If one has a mechanical valve, this has been adjusted in the factory. If one has a pneumatic valve, one must
ensure press air supply (a fixed connection). Press air must be connected by an acknowledged fitter on the unit,
and must be minimum 5 bar and maximum 6 bar. Check pressed air by means of the pressure gauge.
4.5. Pre pressure pumps
Pre - pressure pumps are only present with the HT pumps ( pumps with high temperature).
The pre - pressure pomp must provide for sufficient flow of water to feed the high pressure pump and to occur
cavitation. Cavitation is the phenomenon that in a moving fluid the local pressure is going to be lower than the
vapour pressure of the fluid. Because of this mist bells will arise who can implode with high power in the pump
en could cause damages. For all these applications at high temperature, it is ABSOLUTELY ESSENTIAL to feed
the pump with positive pressure (at least 3 bar) and with a sufficient quantity of water.
DiBO b.v. 52
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