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# Hydraulic Accumulator Formulas

Formula For:Word FormulaLetter Formula
Pressure or Volume
w/ Constant “T” (Temperature)
Original Pressure x Original Volume = Final Pressure x Final VolumeP1 V1  =  P2 V2   Isothermic
Pressure or Temperature
w/ Constant “V” (Volume)
Original Pressure x Final Temperature = Final… Continue reading

## Hydraulic Capacity & Volume Equivalents

Cubic InchesCubic FeetCubic Yards
CU Inches1..0005787.00002143
CU Feet1,728.1..037037
CU Yards46,656.27.1.
Liters61.0234.0353145.001308
U.S. Gallons231..133681.004951
Imp. Gallons277.274.160549.0059429
Lbs Water27.6798.0160184.0005929

## Hydraulic Capacity & Volume Equivalents

LitersU.S. Gallons… Continue reading

# Thermal Formulas

Formula For:Word FormulaLetter Formula
Reservoir Cooling Capacity
Based on Adequate Air Circulation
Heat (BTU/HR) =
2 x Temperature Difference Between Reservoir Walls And Air (ºF) x Area of Reservoir (Sq.Ft.)
BTU/Hr = 2.0 xT x A
Heat in Hydraulic Oil (approx.)
Due to System Inefficiency(SG=.89-.92)
Heat (BTU/HR) =
Flow Rate… Continue reading

# Hydraulic Cylinder Formulas

Cylinder Formulas For:

Word Formula

Letter Formula

Cylinder Area
In Square Inches
Area = x Radius2 (Inches)
Area = x Diameter2 (Inches)
A = r2
A =  or  A = .785D2
Cylinder Force
In Pounds, Push or Pull
Force = Pressure (psi) x Net Area (Square Inches)… Continue reading

# Hydraulic Pump Formulas

Pump Formulas For:Word FormulaLetter Formula
Pump Outlet Flow
In Gallons/Minute
Flow =
Q =
Pump Input Power
In Horsepower Required
Horsepower Input =
HPIN =
or
Pump Efficiency
Overall in Percent
Overall Efficiency = X 100
Overall Efficiency = Volumetric Eff. x Mechanical Eff.
EffQV

# Hydraulic Fluid Formulas

Hydraulic Fluid Formulas For:Word FormulaLetter Formula
Velocity Through Piping
In Feet/Second Velocity
Velocity =V =
Compressibility of Oil
In Additional Required Oil To Reach Pressure
Volume
VA =
* Approximately 1/2 % per 100 psi
Compressibility of a FluidCompressibility =C(ß)=
Specific Gravity of… Continue reading

## Hydraulic Formula Table

Formula For:Word FormulaLetter Formula
Fluid Pressure
In Pounds/Square Inch
Pressure = P = or
psi =
Fluid Flow Rate
In Gallons/Minute
Flow Rate = Q =
Fluid Power
In Horsepower
Horsepower = HP =