A hospital emergency generator requires reliable diesel fuel supply with day tank storage and fuel polishing to prevent contamination. This P&ID documents the process flow from bulk storage to the engine, including transfer, recirculation, and return lines.
Read the decisions behind it.
Used a solenoid-actuated control valve (V-101) on the day tank fill line to enable automatic shutoff based on level.
Included a dedicated fuel polishing loop (P-102 and F-102) to maintains fuel quality during standby periods.
Added a check valve (V-103) on the generator return line to prevent reverse flow.
Instrumented the generator supply line with a flow transmitter and local indicator for operator verification.
Use this pattern for critical standby diesel generator installations in healthcare, data centers, or industrial facilities where fuel quality and day tank level control are essential for reliable engine start-up and operation.