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5.3. DISPENSER OPERATION
NOTICE
The operator is responsible for the operation of the fuel station and it is his duty to monitor the delivery of
fuel and, in the event that the customer performs unauthorized operations at the self‐service dispensers, he must
instruct the customer about proper handling. The operator is also obliged to mark the risk area of the fuel station with
warning symbols (smoking ban, ban on open fire, direction of arrival to the dispenser, etc.). The fuel station operating
instructions must be freely accessible to the customer for any information on basic obligations.
5.3.1. FUEL (PETROL, DIESEL ...) AND TECHNICAL LIQUIDS (WSE, ADBLUE®) DELIVERY
Starting the dispenser is carried out by lifting the delivery nozzle from the nozzle cover which simultaneously
automatically resets the electronic counter data. Then the pump electric motor is started and the fuel can be
delivered. The delivering speed is controlled by the delivery nozzle. Ending the delivery is performed by closing
the delivery nozzle (by releasing the control lever) and its subsequent hanging in the nozzle cover which shuts
down the pump electric motor. The quantity delivered remains unchanged until the delivery nozzle is lifted again
or until the payment.
Fuel delivery. The fluid measured by the meter is delivered into the delivery hose and the delivery nozzle bolted
to the end of the hose. Self‐service fuel stations use delivery stop‐nozzles with a safety shutter. Using the control
lever, the flow rate can be controlled until it stops. In the basic version, the delivery nozzle is supplied with a
lever lock. At customer's request, a delivery nozzle is provided without a lock where the lever must still be
pressed during delivery. When releasing the lever or dropping the delivery stop‐nozzle out of the tank opening,
the fuel flow stops. The stop function occurs when the tank is full after the sensor has detected the fluid level,
the flow stops even when the control lever is depressed. The safety function works, for example, when the
delivery nozzle is not properly handled, i.e., the discharge attachment is higher than 15 degrees from the
horizontal plane upwards, the flow stops even when the control lever is depressed. After the stop function and
the safety function it is necessary to release the control lever to automatically return to the basic position.
Table 33 ‐ Delivery nozzle positions during delivery
Correct position of the delivery nozzle during delivery
The delivery nozzle is almost vertical, the ball does not prevent the passage of air
and the fuel flows.
Incorrect delivery nozzle position
The delivery nozzle is diverted from the horizontal position, the ball prevents the
passage of air and the fuel does not run
In various designs of fuel tank inlet ports, it is necessary to find the optimal
position of the delivery nozzle when the fuel still flows. Flow shut‐off may also
occur when the fuel flow from the delivery nozzle hits the wall of the tank neck.
In that case, it is also necessary to find the optimal position.
138
TATSUNO EUROPE a.s., www.tatsuno‐europe.com
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