6
3.
Design/Configuration/Illustration
The hot water cleaners of this series mainly comprise a low speed high
pressure inline plunger pump incl. of safety shut-down system and a high
performance oil heating unit with vertical double-shell stainless steel heat
exchanger.
The high pressure inline plunger pump is directly flanged to the electric motor.
It directs the feed water via strainer and a safety/control unit into the heating
coil, where the water is heated up to required working temperature. A sealed
safety/control valve which is arranged between high pressure pump and
heating coil opens as soon the max. operating pressure is exceeded by 10 %
and returns the water which cannot be taken by the nozzle back into the
suction line of the high pressure pump.
By means of the burner/thermostat switch fuel supply from internal fuel tank
can be activated. The fuel pump directs the fuel via a filter into the burner
chamber. The oxygen required for the burning process is generated by a
blower system and pressed into the burner chamber; here the mixture is
atomised and ignited by ignition electrodes which are supplied with continuous
voltage by a high voltage transformer. The flame is totally burning inside the
burner chamber without touching the heat exchanger shells at high efficiency.
the infra-red rays generated by this process and hot exhaust fumes economi-
cally heat up the water flowing through the heating coil to the temperature
adjusted at the thermostat. At the high pressure outlet he hot water enters the
high pressure hose, spray lance and spray nozzle and is pressurised to
required working pressure determined by the nozzle diameter.
If required, the working pressure can be reduced at the Vario Jet nozzle and
detergent can be fed into the water stream at low pressure.
The machine is equipped with a circulation shut-down system. When closing
the spray pistol the machine, the safety/control which is arranged down-
streams of the high pressure pump returns the water to the suction line. In
parallel a safety/control unit interrupts the fuel supply to the burner so that it is
stopped. When releasing the spray pistol again, the machine and burner
restart and pressure is generated immediately so that work can be continued
without delay.
A wide range of accessories which allow to increase the efficiency of the
machine is available. Contact OERTZEN or your local dealer for details.
