Call us today. When selecting a pump, a key concern is optimizingpumping efficiency. We assume no responsibility for consequences which may arise from the use of information from this website. P = Pressure in pounds per square inch water horsepower: Q = flow rate or discharge: H = total head: n = pump efficiency: BHP = brake horsepower: NPSH = net positive suction head: V = velocity of fluid or liquid: p = impeller inlet pressure: p v = vapor pressure of fluid or liquid: SW = specific weight of fluid or liquid: g = acceleration of gravity Reciprocating Pump Formula: Minimum Horsepower Required = Max GPM × Max PSI ÷ 1550 I have a pump with no tags or specifications on it. Kleinstreuer C. Modern Fluid Dynamics. It assumes a viscosity similar to that of water. References Pumps & Systems: Reciprocating Pumps Pump Input Power = P. Formula – 1. C = A conversion factor depending on units of flow and pressure. Q = Flow rate in m 3 /sec. When we use data that are related to certain product, we use only data released by public relations departments and allowed for use. Back to Positive Displacement Pump Calculations. Nuclear Reactor Engineering: Reactor Systems Engineering, Springer; 4th edition, 1994, ISBN: 978-0412985317, Todreas Neil E., Kazimi Mujid S. Nuclear Systems Volume I: Thermal Hydraulic Fundamentals, Second Edition. Efficiency = 81%, 125,000 [BBL/Day] × 798 [Hd.Ft.] Q = Flow Rate in gallons per minute P in Watt = Here. Pressure = 798 Hd.Ft. Call us today for help and information. Brake Horsepower. June 1992. P = Pressure in pounds per square inch H = Total developed head in meters = Density in kg/m 3. g = Gravitational constant = 9.81 m/sec 2. η = Efficiency of the pump ( between 0% to 100%) Formula – 2. In the case above, this is for a centrifugal pump. n = Efficiency expressed as a decimal value*. 75 = 3132 In addition, if an electric motor is used to drive the pump, the motor horsepower … U.S. Department of Energy, THERMODYNAMICS, HEAT TRANSFER, AND FLUID FLOW. The formula is most often used in sizing positive displacement pumps. TDH. Pressure = 125 PSI P = Pressure in pounds per square inch. White Frank M., Fluid Mechanics, McGraw-Hill Education, 7th edition, February, 2010, ISBN: 978-0077422417. For more accuracy, refer to your pump manufacturer's pump test sheets. The power required to drive a centrifugal pump is usually known as the brake horsepower. Operating Pressure = 500 PSI Calculating the brake horsepower for the application is a good place to start in finding a pump that is capable of reaching the desired flow and pressure. Liquids with a specific gravity greater than 1.0 are heavier than water and conversely, liquids with a specific gravity lower than 1.0 are lighter weight than water and will generally float on water. Glasstone, Sesonske. The brake horsepower of an engine is the total power required to overcome the force of braking. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Flow Rate. Q = Flow Rate in gallons per minute. / {( 135,788 / 0.75) × 0.81} = 680.2 HP. 100 [gpm] × 500 [psi] / (1714 × 0.930) = 31.37 hp The formula is most often used in sizing positive displacement pumps.

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