## Diesel Fuel Calculator

#### Market

* denotes obsolete models

#### 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.

Customer:
Job Name:
Job Number:

#### TANK INFORMATION

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

#### 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
North American Office:
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