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5.3.1. REFUELLING The liquid dosed by the meter is taken to the dispensing hose and dispensing gun screwed on its end. For selfservice operation of the dispensers there are used stop-guns with a safety shut-off.
The control level allows regulating the flow speed or even stopping it. In the basic version the dispensing gun is
delivered with a lever arrest. Andhe customer’s request we can supply a dispensing gun without any arrest. In
this case the lever must be constantly pressed during the refuelling. When the lever is released or when the
dispensing stop-gun falls out of the car fuel tank opening, the flow of fuel stops.
The stop-function also works, when the car tank is full, as soon as the sensor opening in the gun is filled with
fuel. In this case, the flow will stop even when the control lever is pressed. The safety function helps also
against improper handling of the gun. When the outflow extension is pointed more than 15 degrees off the
horizontal level, the flow stops, even when the lever is pressed. After the application of the stop-function and
safety function the control lever must be released to automatically revert to its default position.
Table 24 – Positions of the dispensing gun during refuelling a vehicle
Proper position of the dispensing gun during refuelling The dispensing gun is almost in a horizontal position, the ball does not prevent the flow of air and the fuel flows. Improper position of the dispensing gun The dispensing gun is diverted from the horizontal position, the ball stops the flow of air and the fuel stops flowing. Since the orifices of fuel tanks of various cars differ, you must find the optimum position for the dispensing gun, when the fuel still flows and is not stopped. The fuel flow may be turned off also when the fuel stream flowing out of the gun hits the wall of the car fuel tank orifice. In that case you need to find a different, optimal position. 5.3.2. ELECTROMECHANICAL LITRE METERS
At the customer’s request the OCEAN dispensers can be equipped with mechanical meters to monitor the total
consumed fuel in each dispensing hose. The meters are on the display of the fuel dispenser. For each dispensing
hose or gun there is one seven-digit meter, which states the quantity of whole litres pumped in the given hose.
For multi-product dispensers the electromechanical meters are listed on the display from top down or from left
to the right and are numbered with the hose numbers. Variants of the layout of the electromechanical meters on
the fuel dispenser display masks are shown in Figure 20.
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