P&ID
Diesel Generator Fuel Supply P&ID
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CASE ANALYSIS
Scenario
A remote telecom tower relies on a diesel generator with an integral day tank. The P&ID covers fuel transfer from bulk storage through filtration and a motorized fill valve into the day tank, with level, flow, and pressure transmitters feeding a field PLC for remote monitoring.
Key decisions
- Use a motorized control valve (fail open) on the day tank fill line to allow remote or automatic refilling while preventing overflow via level monitoring.
- Route process signals from field transmitters to both a local flow controller and a field PLC, enabling local control and remote supervision over the same measurements.
- Include an integral day tank as a separate equipment item connected to the generator, clarifying the boundary between storage and consumption.
When to reuse this
Reusable for any small critical-power fuel system with remote monitoring requirements, such as telecom sites, off-grid backup generators, or remote pumping stations.
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