Technical data

3. Configuration, Operation, Illustration
The cold water machines of this series mainly comprise of a low speed high
pressure inline plunger pump, which is driven by a 100 % duty electric motor
via a maintenance-free tooth belt .
The feed water is directed via a pre-filter to the high pressure pump which – in
connection with the required spray nozzle – boosts it to the stated/adjusted
working pressure. In order to protect the pump against cavitation due to poor
water flow, a low water cut-out is arranged which stops the machine as soon
as the flow pressure drops below 2 bar.
Downstreams of the high pressure pump a locked and sealed safety/control
valve is installed which opens as soon as the operating pressure is exceeded
by more than 20 bar and returns the water which cannot be taken by the
nozzle back into the suction line of the pump.
It also allows to continuously adjust working pressure and water flow as
required.
The machine is equipped with a circulation shut-off system and additionally
with a thermo valve in order to protect the pump against overheating. After
closing the spray pistol the safety/control valve opens, and returns the
circulating water back into the suction line. Re-starting and immediate
generation of required/adjusted working pressure is achieved by opening the
spray pistol again, allowing to continue the cleaning task without delay.
The range of applications can be extended by a variety of accessories
available from Unitor, for more info contact your local Unitor office.