Diesel Fuel Calculator

 

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* denotes obsolete models
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Fuel System Schematic

Tank Data

Notes:
  • Per NFPA20 2022 11.4.1.3.1 Fuel supply tank(s) shall be sized for a minimum of 12 hours of engine run time based on the fuel supply rate requirements of the engine, plus 5% volume for expansion and 5% volume for sump.
  • Per NFPA20 2022 11.4.1.3.1.1 When the fuel supply rate requirements of the engine are not known, fuel supply tank(s) shall have a capacity at least equal to 1 Gal/HP (5.07L/kW), plus 5% volume for expansion and 5% volume for sump.
  • NFPA Tank Run Time = Listed Power ÷ Fuel Consumption
  • Min. Size for 12 Hour Run Time = Fuel Consumption x 12 hours x 1.1
  • Min. Size for 8 Hour Run Time = Fuel Consumption x 8 hours x 1.1
  • Actual Tank Runtime = Actual Tank Size x 0.9 ÷ Fuel Consumption
  • The fuel tank outlet shall not be lower than the fuel transfer pump
  • Refer to the latest edition of NFPA 20 for all fuel tank and fuel line requirements

Fuel Line Sizing

Installation Data


Notes:
  • The fuel return line has 7, 90 degree elbows
  • The fuel supply line has 5, 90 degree elbows
  • Schedule 40 pipe
  • The stated length of pipe
  • The fuel tank outlet shall not be lower than the fuel transfer pump
  • The fuel height in tank's highest point in return

Application Data

Questions, Comments, or Feedback regarding Clarke's Diesel Fuel Calculator should be sent to marketing@clarkefire.com.

FUEL TANK - RESULTS

Customer:
Job Name:
Job Number:

TANK INFORMATION

ENGINE DATA
Engine Model:
Engine Speed:
Rated Power:
NFPA SIZES prior to 2022
Fuel Consumption:
NFPA Min. Tank Size:
NFPA Min. Run Time:
Size for 8 Hour Run Time:
NFPA SIZES per 2022
Fuel Consumption:
NFPA Min. Tank Size:
NFPA Min. Run Time:
Size for 12 Hour Run Time:
 
ACTUAL SIZES
Actual Tank Size:
Actual Run Time:
 
 

FUEL TANK LAYOUT

NOTES:

  • Per NFPA20 2022 11.4.1.3.1 Fuel supply tank(s) shall be sized for a minimum of 12 hours of engine run time based on the fuel supply rate requirements of the engine, plus 5% volume for expansion and 5% volume for sump.
  • Per NFPA20 2022 11.4.1.3.1.1 When the fuel supply rate requirements of the engine are not known, fuel supply tank(s) shall have a capacity at least equal to 1 Gal/HP (5.07L/kW), plus 5% volume for expansion and 5% volume for sump.
  • NFPA Tank Run Time = Listed Power ÷ Fuel Consumption
  • Min. Size for 12 Hour Run Time = Fuel Consumption x 12 hours x 1.1
  • Min. Size for 8 Hour Run Time = Fuel Consumption x 8 hours x 1.1
  • Actual Tank Runtime = Actual Tank Size x 0.9 ÷ Fuel Consumption
  • The fuel tank outlet shall not be lower than the fuel transfer pump
  • Refer to the latest edition of NFPA 20 for all fuel tank and fuel line requirements
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