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Explore CFI case studies, topical literature, and fluid power formulas at your fingertips.

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Literature & VideosCase StudiesFluid Power Formulas
Literature & VideosCase StudiesFluid Power Formulas

Literature & Videos

Get more information from your one-stop partner for fluid power and motion control resources across diverse industries.

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Case Studies

Find out creative and intuitive ways CFI provides customer solutions for increased reliability.

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Featured Case Study

Unique Connection Bridges Accumulation Table With Other Valves

Due to the wiring on the accumulation table’s electric connections, Rexroth directional valves were the only valves that could operate with the system.

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CFI’s Onsite Presence During Testing & Proving Educated Customer On Fluid Conditioning

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Valves Replaced to Address Pressure Levels Plus Saved Customer About $10,000

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Chinese Manufacturer Needed HPUs for Rigs Built In China

Petrochemical

Ability to Source Parts Quickly Reduced the Risk

Plastics

CFI Designed & Built Rotary Actuator to Distinct Specifications

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Superior Filtration Solution Needed for New Rig Design

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Fluid Power Solution Implemented to Underperforming Pneumatic System

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Unique Connection Bridges Accumulation Table With Other Valves

Fluid Power Formulas

You have a job to do and remembering every formula can be tough. Use these formulas to make your day a little easier.

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Basic Fluid Power Formulas
Variable
Word Formulas with Units
Simplified Formulas
Fluid Pressure – P
(PSI) = Force (Pounds) / Area (Sq. In.)
P = F / A
Fluid Flow Rate – Q
GPM = Flow (Gallons) / Unit Time (Minutes)
Q = V / T
Fluid Power in Horsepower – HP
Horsepower = Pressure (PSIG) × Flow (GPM)/ 1714
HP = PQ / 1714
Pump Formulas
Variable
Word Formulas with Units
Simplified Formulas
Pump Output Flow – GPM
GPM = (Speed (rpm) × disp. (cu. in.)) / 231
GPM = (n ×d) / 231
Pump Input Horsepower – HP
HP = GPM × Pressure (psi) / 1714 × Efficiency
HP = (Q ×P) / 1714 × E
Pump Efficiency – E
Overall Efficiency = Output HP / Input HP
EOverall = HPOut / HPIn X 100
Pump Efficiency – E
Overall Efficiency = Volumetric Eff. × Mechanical Eff.
EOverall = EffVol × EffMech.
Pump Volumetric Efficiency – E
Volumetric Efficiency = Actual Flow Rate Output (GPM) / Theoretical Flow Rate Output (GPM) × 100
EffVol = QAct. / QTheo.X 100
Pump Mechanical Efficiency – E
Mechanical Efficiency = Theoretical Torque to Drive / Actual Torque to Drive × 100
EffMech= TTheo / TAct. × 100
Pump Displacement – CIPR
Displacement (In.3 / rev.) = Flow Rate (GPM) × 231 / Pump RPM
CIPR = GPM × 231 / RPM
Pump Torque – T
Torque = Horsepower × 63025 / RPM
T = 63025 × HP / RPM
Pump Torque – T
Torque = Pressure (PSIG) × Pump Displacement (CIPR) / 2π
T = P × CIPR / 6.28
Actuator Formulas
Variable
Word Formulas with Units
Simplified Formulas
Cylinder Area – A
(Sq. In.) = π × Radius (inch)2
A = π × R2
Cylinder Area – A
(Sq. In.) = π × Diameter (inch)2/ 4
A = π × D2 / 4
Cylinder Force – F
(Pounds) = Pressure (psi) × Area (sq. in.)
F = P × A
Cylinder Speed – v
(Feet / sec.) = (231 × Flow Rate (GPM)) / (12 × 60 × Area)
V = (0.3208 × GPM) / A
Cylinder Volume Capacity – V
Volume = π × Radius2 × Stroke (In.) / 231
V = π × R2 × L / 231
Cylinder Flow Rate – Q
Volume = 12 × 60 × Velocity (Ft./Sec.) × Net Area (In.)2 / 231
Q = 3.11688 × v × A
Fluid Motor Torque – T
Torque (in. lbs.) = Pressure (psi) × disp. (in.3 / rev.) / 6.2822
T = P × d / 6.2822
Fluid Motor Torque – T
Torque = HP × 63025 / RPM
T = HP × 63025 / n
Fluid Motor Torque – T
Torque = Flow Rate (GPM) × Pressure × 36.77 / RPM
T = 36.77 × Q × P / n

Services

As problem solvers for industrial motion control applications, our passion is reflected through our range of services in custom systems, repair, fluid conditioning, field service, and actuator exchange services.

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CFI maintains a large fleet of monthly rental equipment and lease-to-own programs. We have the latest models and technology available to assist our customers with their fluid conditioning requirements.

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The CFI Difference

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We are available 24 hours a day, 7 days a week, so you can rest assured that we will be here to help whenever you need us.

Repair to “Like New” Status

Our team will work until your problem is fixed in its entirety, returning your equipment to like-new status so it’s ready to get the job done.

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Industry Experts

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