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Layout of Typical CNG Fueling Station
Compressor
Priority
Valves
Priority/Sequential
Valve Panel*
Sequential
Valves
(2-drop
panel)
LEVEL I
or
LEVEL II
Control
System
Priority/
Sequential
Valve
Control
Panel
LEVEL III
Control
System
Storage Tanks
DOT
Cascade
Dispenser
†
Driver
Slow Fill
Header
* These items are not included in a
LEVEL III control system.
Order seperately.
†
For this standard configuration, the
dispenser must provide a dry contact
closure to initiate a fill and a 4-20 mA
flow rate signal for each drop.
Optional Bypass
Valves (for fast fill)
H
M
L
PT
PT
PT
PT
PT
PT
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