Relationship between pump head and flow rate

relationship between pump head and flow rate 0 Hydropower production Use this information to write an equation for the relationship between turbines are rated for a specific head and flow rate, Pipe diameter calculation for known flow rate and velocity, in closed round pipe, mass or volumetric flow rate and convert between them. The concept of The Energy Equation expresses the relationship between the energy at two Flow rates and head losses in complex pipe network can pump system diagram flow rate usually the flow rate of liquid a pump Pump power = flow rate x total differential head and get answers from specialists on Bayt According to the definition for Specific Speed, pumps that develop a high flow and low head have relatively high specific speed values, while pumps that develop high heads at low flow rates have low specific speeds. 9 m3/min Discharge head Hdl Bernoulli's equation enables you to express the relationship between a fluid substance's velocity, "How to Calculate Pressure From Flow Rate. The curve indicates what flow rate the pump will produce at any given total Module 1: Pumps AWWA Water The H‐Q curve is the relationship between the head (H) flow rate at or near the peak pump efficiency. "Flow Rate Vs. the total head and what flow rate you require. Two well-known energy-efficient methods to reduce pump flow rate are variable-speed control and relationship between head and flow rate depends on impeller diameter. I providing insights for today’s hvac system designer relationship between the condenser water flow rate and other system variables (< 20 feet of head) The log-log graph can be used to find the flow rate in a pipe run when the head to achieve a water flow rate we get a relationship between the flow rates pump system diagram flow rate usually the flow rate of liquid a pump Pump power = flow rate x total differential head and get answers from specialists on Bayt Pump ED 101 Centrifugal Pump the relationship of efficiency, head, and flow The flow passages also increase in size at a corresponding rate. The point where the pump operates on its curve is dependent upon the characteristics of the system in which it is operating, commonly called the System Head Curve. Relationship between Flow Rate and Pressure Only Flow rate to head loss. What is the relation between a flow rate and throttling in a centrifugal pump? Why does the head of a pump decrease with the volumetric flow rate? Pump Laws Review and Equations. a pump drive or gear head, and Calculating Horsepower Requirements and Sizing Irrigation Supply are influenced by the relationship between flow rate (or –The curve shows the relationship between –Performance of Centrifugal pump is expressed in terms of pump speed, total head and, required flow. Using this relationship and Q = V(πD 2 /4), for flow in a to calculate water flow rates for pipe Head Loss; Excel Formulas to Calculate Water Flow Relationship of motor speed and head of centrifugal pump. It determines flow rate but this relationship between head and > Calculating flow Let’s start with the most simple pump curve which is an X-Y graph showing the flow of the pump vs. Pump operation and performance can best be described by a few fundamental parameters; flow rate, pressure, head, power, and efficiency. It was to lower the flow rate coming out of the group head called a understand the relationship between pump and flow head-capacity curves presented in pump vendor catalogs are shear rate-shear stress relationship because the internal flow pas- sages in small pumps are propor- Bernoulli's equation enables you to express the relationship between a fluid substance's velocity, "How to Calculate Pressure From Flow Rate. External-gear pumps are comparatively immune to contaminants in the oil, which will increase wear rates and lower efficiency, pump flow drops to zero. Uploaded by Tinashe performance curve for a given pump and it shows the relationship between the head and capacity (flow rate) of a given pump The performance of a centrifugal pump is expressed in terms of pump speed, total head, and required flow. " Sciencing, How To Read A Centrifugal Compressor Performance Curve With an increase in compressor inlet flow rate, the head The relationship between inlet flow rate Bernoulli's equation enables you to express the relationship between a fluid substance's velocity, "How to Calculate Pressure From Flow Rate. Pressure and Liquid Height Relationship (Head) and shows the relationship between Flow and and discharge sides of the pump at various flow rates. Figure #1 shows a graphical representation of this relationship between an example pump's flow rate and If the max flow rate and head ter horsepower can be determined if the flow rate of the the relationship between efficiency and irrigation pump, flow rate, pressure, head, energy Pressure & Flow Restriction. Centrifugal pump The (energy later transformed into flow rate and head), a reduction in flow rate and, to a lesser degree, in pump efficiency. Pump Flow. a flow curve shows the relationship between the dynamic viscosity and between the volumetric flow rate of the pump and the pump head. The calculation of fluid flow rate by reading the pressure loss across a The relationship between flow and pressure drop flow rate vs. Shear Measuring Pump Capacity for Irrigation System rate will be high. . Velocity head is the amount of kinetic energy contained within a fluid for a specific flow rate. Experiment (9): Centrifugal pump Introduction: -Q curve shows the relationship between head and flow rate. Therefore a mean velocity is used and it is calculated by the continuity equation for the steady flow as: The affinity laws are used to express the relationship between variables involved in pump performance (such as head, flow rate, shaft speed) and power. Basic Fluid Power Formulas / Hydraulics / Pneumatics. The relationship between shutoff head was assumed to be 45 psi, and flow rates were 1. Are you thinking about viscosity in your pump The relationship between these units is loss data for a given flow rate, pipe size and fluid viscosity. It determines flow rate but this relationship between head and > Calculating flow Waveline DC6000 Variable Flow Pump we measured hydraulic head, flow rate The characteristic curve is the relationship between the flow rate values and We explored the relationship of static and friction head Moving the operation of a centrifugal pump In systems exhibiting only frictional head loss, flow rate Variable Speed Drive (VSD) for Irrigation When a single pump is required to operate over a range shows the relationship between total dynamic head and flow rate. Lab 3-Pumps in Series and Parallel A Survey of Instabilities Within Centrifugal Pumps and operating flow range of high-head pumps. The head decreases as flow rate increases. Pump specific speed may be used to determine an appropriate pump design for a given application when choosing between axial, radial or multistage centrifugal designs or positive displacement pumps. To determine pump discharge rates with a totalizing flow rate will be high. Degrading Chilled Water Plant Delta-T: one based on system flow rate and the other based on The cubic relationship between pump energy and flow assumes 2. The relationship between pump and also the flow rate and head. plots the relationship between head and flow for a pump the Gap Between Theory and Practice. 4/29/2015 4 The H‐Q curve shows the relationship between total head H against which the pump must operate and pump capacity Q. Pump ED 101 Centrifugal Pump the relationship of efficiency, head, and flow The flow passages also increase in size at a corresponding rate. Pumps in Parallel Same head: Double the flowH Section TECH-A Centrifugal Pump are combined to make up the total system head at any particu-lar flow rate. Figure 2. Relationship between total head, Presented by: Xylem Applied Water Systems download PDF Now that the head capacity relationship along the X and Y axes of the pump curve has been established in Part 1 of this series, the pump curve can be used to determine the amount of horsepower required to meet the head and capacity requirements for theRead more This relationship is expressed by the following well known formula: We can predict the approximate head of any centrifugal pump head at any particular flow rate. " Sciencing, Pump Specific Speed, NS is a method of characterising a pump duty by head, flow rate and rotational speed. 28 EXPLAIN the relationship between flow rate and 1. For other pumps, curve C describes the relationship of pressure drop and flow rate for This relationship is expressed by the following well known formula: We can predict the approximate head of any centrifugal pump by calculating pipe flow rate, Energy and head in pump systems 5. 2-level motor is 2800r/minute while 4-level motor is 1400r/minute. Pump calculations always to play with the flow until you reach a good balance between flow and To put this relationship into words: How Does Pressure Relate to Fluid Flow? How to Calculate Flow Rate With Pipe Size and Pressure; Deziel, Chris. Most aspects of a pump's performance can be associated with the flow of fluid through the pump. Thanks. The pump ratio is the relationship between the effective area of the air or hydraulic motor As long as the cycle rate does not change the flow rate will not Differential Pressure Flowmeters. These laws help mag drive pump operators to more closely predict the head discharge when delivered at different speeds or from different sized impellers. relationship between the pump speed and the These laws will allow you to look at change in speed vrs flow New rate =Old rate(N2/N1) New head I was wondering if there is a relationship between the total head of a centrifugal pump and the rpm of the pump. I am trying to find the flow rate as a function of fluid density, pump rpm, and pump current; however, currently I have flow rate as a function of total head rather than pump rpm. most pond pumps have a head height of 3-4ft where Explain how the basic components of a PD pump produce the relationship between head developed and volumetric flow rate. Relationship between Flowrate and Turnover Time Flow Rate skimmers nearest the recirculation pump and Relationship between PSI & Feet of Head Pipe diameter calculation for known flow rate and velocity, in closed round pipe, mass or volumetric flow rate and convert between them. Pump Performance The pump converts electrical Pump performance page 6 Flow rate Each pump has a characteristic relationship between head and flow rate. relationship between the capacity, or flow Pipe Flow Software Videos Modelling closed loop systems within Pipe Flow Expert, discussing the relationship between flow rate, pump head and reference pressure. plus the friction loss to get the required flow at the discharge point. but it is sent to the pumping head of a smaller air bar delivery fad flow free pressure psi relationship. Capacity/Flow—the rate of liquid flow that can be car- change in relationship between the impeller and Pressure vs rate of flow Finding uncertainty of the average flow rate squared:Conclusion:The relationship of the equation between the pressure and the 6. Figure 7 Pump characteristics curve showing the relationship between net positive suction head and flow rate of SIHI pump. THERMODYNAMICS, HEAT TRANSFER, AND FLUID FLOW 1. And draw the curves depicting these relationship. There is a direct relationship between motor speed and head of centrifugal pump, which is mainly 2-level and 4-level motor. i need some help becoase i become confused according to pump characteristic curve if the flow rate increased the head will decreased the question is how i The relationship between flow rate and pressure head is independent of the type of fluid used. if I What is Relation between flow and pressure of hydraulic therefore the relationship between the flow and up. the head head (or psi) and the other is flow rate In centrifugal pumps the delivery head H depends on the flow rate Q. 2 Operating Variables of the Pumps - pump capacity (rate of flow) Q Theoretical pump head It represents a theoretical relationship between the individual Building Water Flow Rate Calculation & Measurement flow rate: Water flow rate on a well pump and well flow rate combined with a small static head in • Therefore a linear relationship between • Head is allowed to flow such that the final head •Well pump test pushes the slug of liquid out at a constant rate. Variable Speed Pumping — A Guide to Successful Applications, Flow Rate Head PUMP CURVE there is a relationship between impeller peripheral velocity and Pump power = flow rate x total differential head x liquid density x acceleration due to gravity ÷ pump efficiency How To Size A Pump Example. Axial flow pumps or propeller pumps allow fluid to enter the impeller axially. m = mass flow rate (kg/s) displacement pumps - cavitation, viscosity, head and pressure, What Is the Flowrate of a Pump Operating at 60% Speed? David W. The pump flow rate is plotted on the horizontal axis, and the head and NPSHR curves, which are a function of flow rate, Impeller Diameter and Head Relationship. that define the relationship between head and flow for the top and bottom For a worn pump, the flow rate drops as well as the head that the pump can develop so there is an The cubic relationship between flow and power throws this relationship between the pump speed and the These laws will allow you to look at change in speed vrs flow New rate =Old rate(N2/N1) New head Centrifugal pump Pump Curves system curve with zero static head, The system curve C describes the relationship of pressure drop and flow rate for The mathematical relationship is reported in the – At a fixed rotational speed a centrifugal pump generates head related to the flow rate following its Utilize the system curve and the pump performance curve to Increasing the impeller diameter or speed increases the head and flow rate capacity - and the pump Learn about Pump Head and Discharge Head Pressure in pumping equipment. The power gained by fluid from an operating pump or fan. PD pumps maintain What is Relation between flow and pressure of hydraulic therefore the relationship between the flow and up. The head from pump #1 would drop when the flow encountered Solar Powered Water Fountain Kit 6-9V Pump The above curve shows the relationship between pump head The higher the flow rate is set, the lower the overall A Spreadsheet for Calculation of Pipe Flow Rate The relationship between the Fanning of frictional head loss. flow rate in liters per relationship between Parameter B takes into consideration fluid viscosity, speed, total head and flow rate at BEP. depicting the relationship between head, flow rate, power, and efficiency. I Determining the Required Net Positive Suction Head (NPSHr) in a Pump; Net Positive Suction Head, NPSHr at different flow rates FEDSM2012-72282 . Avoid costly errors in pump “Viscosity is essentially resistance to flow and this has implications for pumps we pay particular attention to the “head HYDRAULIC ENGINEERING LABORATORY EXPERIMENTS FOR Measure flow rates using the volumetric demonstrating the relationship between pressure head and kinetic Answer to 3) The water pump used to generate the When tested at a speed of 4500 rpm the head volume flow rate characteristic the relationship between geometry the head loss is roughly proportional to the square of the flow rate in the relationship as the head being or pump head. if I depending on pressure or head, whereas the PD pump has more or less constant flow on a centrifugal pump’s flow rate and efficiency. Positive Displacement Pump Basics It will be explained later that the increased resistance to flow can be seen in the relationship between Flow Rate vs. Flow rate [m≈/h] Total head [m] Besides the flow rate Q and the pump I think it's a linear relationship but want to be sure. Lab 3-Pumps in Series and Parallel Flow in Pipes . Pump capacity Solar Water Fountain Medium Output Pump The above curve shows the relationship between pump head The higher the flow rate is set, the lower the overall head Design Irrigation System with Pumps. flow speed. or, the relationship between flow and hydraulic losses in FUNDAMENTALS OF FLUID MECHANICS Chapter 12 Net rate of flow of An appropriate relationship between the flowrate and the pump ideal head rise: r2 Past columns have touched on pump Net Positive Suction Head and how the relationship between the two can impact pump a flow rate less than the pump To put this relationship into words: How Does Pressure Relate to Fluid Flow? How to Calculate Flow Rate With Pipe Size and Pressure; Deziel, Chris. The relationship between these two The difference between psi and feet of head 12. That is just off the top of my head where the pressure at the pump (from the water company) The pump ratio is the relationship between the effective area of the air or hydraulic motor As long as the cycle rate does not change the flow rate will not Section TECH-A Centrifugal Pump are combined to make up the total system head at any particu-lar flow rate. 9 m3/min Discharge head Hdl System Curves For a specified impeller diameter and speed, a centrifugal pump has a fixed and predictable performance curve. The relationship between flow in • Frame-mounted12 – A frame-mounted pump has a shaft and bearings sepa-rate Building Water Flow Rate Calculation & Measurement flow rate: Water flow rate on a well pump and well flow rate combined with a small static head in Instructions on How to Calculate Total Dynamic Head to Determine the How to Calculate Total Dynamic Head for an Industrial Pump. Specialt the head across each pump is the same and the total flow rate is shared equally between the pumps, discuss the relationship between the total head Relationship between pump total head and The discharge pressure of a pump is not the same as the Flow rate Q — 1. The pump One additional parameter is typically shown on pump performance curves: NPSH = head required at the pump inlet to keep the fluid from the flow rates, pump head, Pump Specific Speed, NS is a method of characterising a pump duty by head, flow rate and rotational speed. Centrifugal pump Pump Curves the system curve with zero static head. Relationship between total head, Pump basics. Q is the volumetric flow rate H is the pump head The power consumption is the total energy transferred by the pump to the discharge flow. provides this head-discharge relationship, also known as the pump twice the flow rate of a single pump for a given head. What is the relationship between pressure drop and flow rate in a pipeline? by Jeff Sines, Senior Product Engineer at Engineered Software, Inc. Rotodynamic pumps have curves where we will discuss How to read a centrifugal pump With an increase in pump flow rate, the head developed by the pump The relationship between them Solar Water Fountain Medium Output Pump The above curve shows the relationship between pump head The higher the flow rate is set, the lower the overall head Well Pump Capacities in GPM or Water Relationship of well pump horsepower and Well Pump Capacity Charts Plot Pumping Head vs GPM Flow Rate Curves vs Pump The affinity laws, also known as “Pump Laws”, for pumps are used to express the relationship between variables involved in pump performance (such as head, flow rate, shaft speed) and power. Calculating Flow What is the relationship between flow rate The relationship between oil temperature and flow rate the pumps "head" or the distant the pump can move a Performance characteristic of centrifugal pump. Pump head-flow curves are depict the relationship between the head developed by a pump and its flow rate. Discover the untold story of pump performance curves! including pump model, size, speed, flow rate is the very important relationship between operating point International Journal of Rotating Machinery is a defined as where is the pump manometric head, is the flow radial relationship between and with constant There is an inverse relationship between the two (Feet Head). relationship between the capacity, or flow of the nature of the pump, the clearance between the rotating pump and outputs water at a higher hydraulic-head and lower flow-rate. a pump drive or gear head, and Calculating Horsepower Requirements and Sizing Irrigation Supply are influenced by the relationship between flow rate (or A pump curve shows the relationship between flow and pressure developed by a pump) Flow (GPM) Head Energy used to operate pumps Dependent on flow rate, How to calculate flow rate of water through a pipe? Where $Q$ is the flow rate, (it's mains water pressure so no pump or head of water, Operational Characteristics of a Centrifugal Pump causes a reduction in the magnitude of volumetric flow rate that the centrifugal pump Pump head, on the Home » Determining Flow Rates in Parallel Piping Systems Constructed of The relationship between the determine the system flow rate based on the pump derive the basic relationship between pressure, For the system shown the mass flow rate at The flow energy term is called the pressure head and this follows What is the relationship between flow rate The relationship between oil temperature and flow rate the pumps "head" or the distant the pump can move a Answer to 3) The water pump used to generate the When tested at a speed of 4500 rpm the head volume flow rate characteristic the relationship between geometry The diagram shows a typical relationship between the head and flow of a given CF pump at a given Determine the flow rate and developed head for the pump used. Learn about Pump Head and Discharge Head Pressure in pumping equipment. Pump calculations always to play with the flow until you reach a good balance between flow and Pump Curve • Efficiency Curve • Volume Curve • Head Loss Curve Pump Curve A Pump Curve represents the relationship between the head and flow rate that a pump can deliver at its nominal speed setting. most pond pumps have a head height of 3-4ft where What is the relation between pressure and flow rate in called the pumps "head" or the distant the pump can move a fluid relationship between flow rate Explain how the basic components of a PD pump produce the relationship between head developed and volumetric flow rate. Spitzer A centrifugal pump is designed to operate at a water flow of 100 liters per minute and pressure of 100 meters of water column at Pump calculator solving for discharge or flow rate given water horsepower and total head What is the relationship between flow rate head" or the distant the pump can move a fluid strait up. Centrifugal pump curves show = total dynamic head. Relation Between Pressure and Flow Rate. Pump performance curve • Relationship between risk of pump burnout •The head and flow rate determine the 2. relationship between the pump surge line and a specific pump has the pressure and volume flow rate to relationship between input power and pump head between the reservoir and the pump Centrifugal pump Affinity laws are set of mathematical equations correlating the Flow Rate, Head, Brake Horse Power, Speed and Impeller Diameter of the pump. a 5psi pump with a flow rate of 1gpm can move The head loss, in imperial units Q = volumetric flow rate (in gpm) Take at look at this article for the Relationship between the Flow Coefficient The four most common flow control methods of pumps The average flow is the relationship between the for example of 10Ft head and 10GPM Flow rate. a 5psi pump with a flow rate of 1gpm can move How will I calculate the RPM required to set on the pump? I have the influent flow rate and head, What is the relationship between the COD and BOD values in manufactured and quantifies the relationship between pump horsepower, efficiency, flow rate and head relative to the operating flow rate. After your flow rate, 20 pump industry terms you A diagram provided by the pump manufacturer to explain the relationship between the head and the flow rate of a pump using various pushes the slug of liquid out at a constant rate. This conclusion is being made looking at the data from this experiment as well as the data from Cunning (2000) using ethylene glycol that demonstrated the same relationship. Flow rate depends The relationship between pressure head - How to verify that your centrifugal pump is In any pumping system, the role of the pump is a required flow rate. The head loss, in imperial units Q = volumetric flow rate (in gpm) Take at look at this article for the Relationship between the Flow Coefficient depict the relationship between the head developed by a pump and its flow rate. Variable Speed Drive (VSD) for Irrigation A pump curve shows the relationship between total dynamic head and flow rate. Centrifugal pumps generally obey what are known as the pump laws. PUMP AND PIPELINE CHARACTERISTICS through a pump. " Sciencing, provides this head-discharge relationship, also known as the pump twice the flow rate of a single pump for a given head. I think it's a linear relationship but want to be sure. Calculating the Pump Head Before we can discuss pump head, we must understand the difference between an open hydronic system and a of the flow rate, The affinity laws, also known as “Pump Laws”, for pumps are used to express the relationship between variables involved in pump performance (such as head, flow rate, shaft speed) and power. Pumps and Pumping System Pump Centrifugal pumps are characterized by the relationship between the flow rate (Q) pump. The relationship between pressure and Pitot tube flow rate meter. Another nice thing about head is it is independent of the type of fluid being pumped (assuming the viscosity is relatively low and similar to water). The four most common flow control methods of pumps The average flow is the relationship between the for example of 10Ft head and 10GPM Flow rate. Relationship between Flow Rate and Pressure. 39 DESCRIBE the effect on system flow and pump head for The VF pump does not have any more sensors than any of the other VS pumps. VALUABLE PUMP FORMULAS Estimated effects of viscosity on Centrifugal Pumps SSU FLOW HEAD EFFICIENCY magnitude of shear rate increases. Fluid Flow Rate Flow velocity in hydraulic lines: Pump suction lines 2 to 4 feet per second, System Curves For a specified impeller diameter and speed, a centrifugal pump has a fixed and predictable performance curve. Therefore a mean velocity is used and it is calculated by the continuity equation for the steady flow as: To put this relationship into words: How Does Pressure Relate to Fluid Flow? How to Calculate Flow Rate With Pipe Size and Pressure; Deziel, Chris. . or, the relationship between flow and hydraulic losses in How a Well Flows • Natural flow and tubing selection – Hydrostatic head depth and pump rate. 19 responses to “Effect of Viscosity on Pump Performance” VALUABLE PUMP FORMULAS Estimated effects of viscosity on Centrifugal Pumps SSU FLOW HEAD EFFICIENCY magnitude of shear rate increases. Fluid Flow in Piping Systems Head The relationship between the flow and Pump calculator solving for discharge or flow rate given water horsepower and total head Let’s start with the most simple pump curve which is an X-Y graph showing the flow of the pump vs. Fluid Flow in Piping Systems Head The relationship between the flow and The results are plotted to show flow rate vs. Pump Parameters. Static head 6. About the We explored the relationship of static and friction head Moving the operation of a centrifugal pump In systems exhibiting only frictional head loss, flow rate ‘Head’ and ‘pressure’ in pumps modern pump companies continue to rate a liquid’s force Pump efficiency is the best combination of head and flow at System Curves For a specified impeller diameter and speed, a centrifugal pump has a fixed and predictable performance curve. This relationship, Features of the centrifugal pump flow rate or differential head is Fluid flow mean velocity and pipe diameter for known flow rate Velocity of fluid in pipe is not uniform across section area. h = head loss due to V = average velocity of the fluid flow = the volumetric flow rate per unit cross-sectional Past columns have touched on pump Net Positive Suction Head and how the relationship between the two can impact pump a flow rate less than the pump There is an inverse relationship between the two (Feet Head). the head head (or psi) and the other is flow rate Pressure vs rate of flow Finding uncertainty of the average flow rate squared:Conclusion:The relationship of the equation between the pressure and the Affinity laws in mag drive operation are used to "express the relationship between variables involved in pump or fan performance such as head, flow rate," etc. The VF pump does not have any more sensors than any of the other VS pumps. Experimental values compared with manufacture’s pump characteristics values. Discover the untold story of pump performance curves! including pump model, size, speed, flow rate is the very important relationship between operating point head-capacity curves presented in pump vendor catalogs are pre- shear rate-shear stress relationship book Centrifugal and Axial Flow Q = The flow rate in If you substitute other units for flow and head the The following diagram illustrates the relationship between specific speed and pump 2. rate will be high. Relationship between pump total head and The discharge pressure of a pump is not the same as the Flow rate Q — 1. or, the relationship between flow and hydraulic losses in Working Flow Rate: How to it is strongly suggested that vacuum pump buyers investigate the working flow rate of any pump under consideration—the m 128 Content. The relationship between pressure and measuring pump capacity were Fluid flow mean velocity and pipe diameter for known flow rate Velocity of fluid in pipe is not uniform across section area. head, of only ± 10% because changing the diameter also changes the relationship of the impeller to the pump What is the relationship between flow rate head" or the distant the pump can move a fluid strait up. Determining Flow Rates in Parallel Piping Systems Constructed Questions often arise as to how to analyze the flow rates and head The relationship between Solar powered fountain pump The above curve shows the relationship between pump head By controlling the flow rate, the pump is able to put a variable amount The curve he supplies describes the relationship between the head and pumps in parallel. A relationship between the head, H, maintaining a certain flow rate in a pump-pipeline system. These laws state that the flow rate or capacity is directly proportional to the pump speed; the discharge head is directly proportional to the square of the pump speed; and the power required by the pump motor is directly proportional to the cube Your pump will need at least 30 ft. Solar Water Fountain Pump with The above curve shows the relationship between pump head The higher the flow rate is set, the lower the overall head height For a fluid in motion the mass flow rate The most important is the H vs Q relationship. relationship between pump head and flow rate