Pressure Washer Calculations

PSI (Pound per Square inch)

GPM (Gallons per Minute)

Desired Temperature Rise (Fahrenheit Rise over ambient water temperature)

Spray nozzle distance to surface (Inches)

Elevation of gun above pressure washer (Feet)

Elevation in feet above sea level (For Gasoline HP Loss)

Water tank Capacity (Gallons / If Tank Fed)

Nozzle Size (Round up or down to nearest 1/2 size)

Cleaning Units

Required horsepower / Gas engine

Required horsepower / Electric motor

Required horsepower / Diesel engine

Required horsepower / Hydraulic motor

Required BTU's (British Thermal Unit)

Gallons per hour / Diesel #1 (Burner)

Gallons per hour / Diesel #2 (Burner)

Gallons per hour / Kerosene (Burner)

Gallons per hour / Natural gas (Burner)

Gallons per hour / Propane (Burner)

Gallons per hour / Gasoline (Gas Engine Aprox)

Pounds per hour / Diesel #1 (Burner)

Pounds per hour / Diesel #2 (Burner)

Pounds per hour / Kerosene (Burner)

Pounds per hour / Natural gas (Burner)

Pounds per hour / Liquid propane (Burner)

Pounds per hour / Gasoline (Gas Engine Drive)

Pounds / Water per minute

Liters / Minute (Metric Volume Rating)

Water tank weight (Lbs of Water in Tank)

Water tank duration (Minutes at Constant Use)

Estimated electric motor amp draw @ 115VAC 1PH

Estimated electric motor amp draw @ 230VAC 1PH

Estimated electric motor amp draw @ 230VAC 3PH

Estimated electric motor amp draw @ 460VAC 3PH

Estimated electric motor amp draw @ 575VAC 3PH

BAR (Metric pressure rating)

Theoretical impact (LBS) AT 12"

Theoretical vertical pressure loss (PSI)

Theoretical gasoline horsepower loss from elevation

Theoretical 15 Degree nozzle coverage (Inches)

Theoretical 25 degree nozzle coverage (Inches)

Theoretical 40 degree nozzle coverage (Inches)

Theoretical 65 degree nozzle coverage (Inches)

Fuel Nozzle Size

Fuel Pressure (Must be 100 PSI - 200 PSI)

Gallons per hour / Diesel 1, 2 or Kerosene

BTU / HR / Diesel #1

BTU / HR / Diesel #2

BTU / HR / Kerosene

Liter = Gallon

Celsius = Fahrenheit

Fahrenheit = Celsius

BAR = PSI

PSI = BAR