Design Of Pipelines - tatsuno OCEAN TOWER Series Installation And User Manual

Fuel Dispensers TATSUNO EUROPE ‐ Installation and User Manual , revision 10, January 2022
Picture 73 – Example of connection of the dispenser with suction pumps to the aboveground storage tank
Legend: 1 – dispenser, 2 – vapor return line (recuperation), 3 – suction fuel line, 4 – suction basket (without non‐return valve), 5 – above‐ground
fuel tank, 6 – overpressure non‐return valve (OPW 199ASW), 7 –Drain and shut‐off valve, 8 – return line from the dispenser pump separator, 9 –
drip tray with base frame of the dispenser, 10 – connection piece (bellows) with flange
NOTICE
Overground storage tank. The pumping monoblock of dispensers is designed with a permanently open‐
air separator into the venting chamber formed by the space in the monoblock body and the monoblock lid space.
A hole with an integrated DN6 connection for connecting the air exhaust pipe is in the top of the lid. To prevent
overfilling of the pumping monoblock venting chamber and leakage of the medium into the dispenser interior and
then into its surroundings in case of leakage or blockage of the check valve when the dispenser is out of operation,
it is necessary to connect the outlet of the pumping monoblock separator to the storage tank. This connection
can be made using a pipe Ø 10 x 1 (DN8) connected to the DN8 pipe connection. The pipe connection is screwed
through the seal in the M12x1.5 hole in the top of the monoblock lid. The pipe outlet must be inserted into the
storage tank lid using the DN8 corner connection.
3.3.6. DESIGN OF PIPELINES
The dispenser manufacturer recommends conducting piping in a standard way where a separate pipeline
runs from each pump in the dispenser to a relevant fuel tank.
NOTE
There is also a so‐called backbone piping system where several dispensers (pumps) are connected to one
supply pipeline from the storage tank. The dispenser manufacturer does not recommend this backbone piping
system due to possible instability of the fuel suction from storage tanks. If the designer decides for the backbone
piping system, the dispenser manufacturer requires to include disk valves in the suction pipeline which will
functionally separate the dispensers from one another.
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