pump definition head

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  • PUMP HEAD | Definition of PUMP HEAD by Oxford

    noun. 1 The head of a pump, at which the liquid that has been lifted emerges. 2 A hood at the head of a chain-pump for catching water that might otherwise be thrown off.

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  • What is Pump Head – Performance Curve of

    2019-5-22 · Head is a measurement of the height of the incompressible fluid column the pump could create from the kinetic energy, that the pump gives to the liquid. The head and flow rate determine the performance of a pump, which is graphically shown in the figure as the performance curve or pump characteristic curve.

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  • Head Pump | Definition of Head Pump by Oxford

    noun. Nautical. 1 A small pump at the front of a ship for drawing up seawater (now historical). 2 A pump for pumping out waste from an on-board lavatory; compare sense 22c (a).

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  • What is head? - pumpfundamentals.com

    A small pump fixed at the vessel's bow, its lower end communicating with the sea: it is mostly used for washing decks. How to pronounce head-pump?

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  • Pump Head Explained | ieDepot Blog

    2021-5-13 · Simply stated: a pump’s head is the maximum height that the pump can achieve pumping against gravity. Intuitively, if a pump can produce more pressure, it can pump water higher and produce a …

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  • What is Pumping Head? - Pump Solutions Australasia

    Pump Definitions and Nomenclature: Head (h) [H]– Head is the expression of the energy content of a liquid in reference to an arbitrary datum. It is expressed in units of energy per unit weight of liquid. The measuring unit for head is meters (feet) of liquid.

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  • What does head-pump mean? - Definitions.net

    2020-8-9 · This is the vertical distance in meters from the pump datum to the highest delivery point. These are the basics definitions of ‘’head’’. It is to be understood that for finding out the static head, the simple rule is: Subtract static suction lift or head from static discharge head… and you get …

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  • What is head? - pumpfundamentals.com

    2019-3-16 · Head is the height at which a pump can raise water up, that's it, it's that simple. Figure 2 The meaning of head. Connect a tube to the discharge of a pump and measure the water height, that the head of the pump. OK, so head is somehow linked to pressure, in what way? We will get to that later.

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  • Head Pump | Definition of Head Pump by Oxford

    1 A small pump at the front of a ship for drawing up seawater (now historical). 2 A pump for pumping out waste from an on-board lavatory; compare sense 22c(a). Origin

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  • What does head-pump mean? - Definitions.net

    Definition of head-pump in the Definitions.net dictionary. Meaning of head-pump. What does head-pump mean? Information and translations of head-pump in the most comprehensive dictionary definitions resource on the web.

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  • Pump Head - Process Engineering Tools

    2021-2-22 · Definition. What is the pump head ? The pump head is the actual pressure developped by a pump. It is expressed in vertical m of liquid (water for pump characteristics graphs). The pump head takes into consideration the difference of pressure in between suction and discharge but also the speed difference, all converted to m of liquid. ...

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  • What Does Water Pump Maximum and Rated Head

    2018-6-14 · It is best to examine what it would mean for a pump to have a maximum head of 35 metres. This means that under ideal install conditions, the pump can pressurise water to this height. Surely, this would be suitable for most home owners. Perhaps it would suffice, but there are two missing questions that must be answered before going with such a ...

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  • Pumping Head Height Explained | Creative Pumps

    2021-5-14 · It's called Static head. It does not count as pumping height because the water is already at the surface and does not have to be pumped there. Maximum depth the pump can be located. depending on the pump there is a maximum depth that a pump will operate. The larger the pump the deeper it's suitable placement.

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  • Relationship Between Pump Flow, Head And Impeller

    2020-7-30 · Definition formula and characteristics of pump specific speed. Definition formula: in the design and manufacture of pumps, in order to compare the pumps with various flow and head, the actual size of a pump is geometrically reduced to standard pump, and the secondary standard pump should meet the requirements of flow rate of 75L s and head of 1m.

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  • Postperfusion Syndrome: What You Should Know If

    2019-3-15 · Is Pump Head a Form of Brain Damage? Yes – but clinicians and researchers prefer to use the term “brain injury.” A more accurate way to describe pump head in this context would be that it is a type of “acquired brain injury (ABI).” Acquired Brain Injury (ABI) is …

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  • Importing Pump Definitions Using ModelBuilder

    2019-2-13 · However, to import multipoint head, efficiency or speed vs. efficiency curves, the tabular values must be imported under Table Types: Pump Definition - Pump Curves, Pump Definition - Flow-Efficiency Curve, and Pump Definition - Speed-Efficiency Curve respectively. The list of properties that can be imported under Pump Definition is given below.

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  • What is NPSH? | Pumps & Systems

    2011-12-17 · What is Net Positive Suction Head? The margin of pressure over vapor pressure, at the pump suction nozzle, is Net Positive Suction Head (NPSH). NPSH is the difference between suction pressure (stagnation) and vapor pressure. In equation form: NPSH = P s ‑ P vap. Where: NPSH = NPSH available from the system, at the pump inlet, with the pump ...

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  • What is head? - pumpfundamentals.com

    2019-3-16 · Head is the height at which a pump can raise water up, that's it, it's that simple. Figure 2 The meaning of head. Connect a tube to the discharge of a pump and measure the water height, that the head of the pump. OK, so head is somehow linked to pressure, in what way? We will get to that later.

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  • ‘Head’ and ‘pressure’ in pumps | Water Tech Online

    2010-10-13 · If you need a pump to develop 30 psi of water pressure, then buy a pump that develops 70 feet of head. So, it turns out that back in 1965, the pump sales rep was trying to show me the correct pump for my application. Differential pressure. Allow me to refine a couple of points: Pumps develop differential head, or differential pressure.

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  • Pumping Head Height Explained | Creative Pumps

    2021-5-14 · It's called Static head. It does not count as pumping height because the water is already at the surface and does not have to be pumped there. Maximum depth the pump can be located. depending on the pump there is a maximum depth that a pump will operate. The larger the pump the deeper it's suitable placement.

    Get Price
  • Importing Pump Definitions Using ModelBuilder

    2019-2-13 · However, to import multipoint head, efficiency or speed vs. efficiency curves, the tabular values must be imported under Table Types: Pump Definition - Pump Curves, Pump Definition - Flow-Efficiency Curve, and Pump Definition - Speed-Efficiency Curve respectively. The list of properties that can be imported under Pump Definition is given below.

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  • Component Database > Pump definition

    General frame. The pump device is considered as a black-box, with Current and Voltage inputs on the electric side, and Head and Flowrate values at the hydraulic side (cf Pump model).Technical features of the motor-pump aggregate are not needed in detail. In PVsyst, many Pump are associated with a power converter, which have to be included in the pump device definition.

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  • Total Dynamic Head (TDH) Definition | Intro to Pumps

    A pump will generate TDH in response to the characteristics of a pumping system which can be expressed by a system curve. When a pump curve and a system curve are plotted on the same graph, the intersection of the curves is the point at which the pump will operate, and the head at that point is the TDH the pump will generate.

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  • Relationship Between Pump Flow, Head And Impeller

    2020-7-30 · Definition formula and characteristics of pump specific speed. Definition formula: in the design and manufacture of pumps, in order to compare the pumps with various flow and head, the actual size of a pump is geometrically reduced to standard pump, and the secondary standard pump should meet the requirements of flow rate of 75L s and head of 1m.

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  • Visual Pump Glossary

    2019-4-26 · Axial flow pump: refers to a design of a centrifugal pump for high flow and low head.The impeller shape is similar to a propeller. The value of the specific speed number will provide an indication whether an axial flow pump design is suitable for your application. see axial flow pumps.. They are used extensively in the state of Florida to control the water level in the canals of low lying ...

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  • Pump & System Curve Data for Centrifugal Pump

    2019-7-29 · The pump affinity laws provide methods for approximation of the effects of changed impeller diameters and rotational speeds on the pump curve. These laws state: 1. Pump GPM capacity varies directly as the speed (RPM) or impeller diameter ratio change. 2. Pump head varies directly as the square of the speed (RPM) or impeller ratio change. 3.

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  • Head Rise and the Energy Equation - for Pump or Fan

    2021-5-7 · Actual Head Rise of a Pump or Fan. Using the Energy Equation the head rise through a pump or fan can be expressed as:. h a = (p 2 - p 1) γ + (h 2 - h 1) + (v 2 2 - v 1 2) 2 g (1). where. h a = actual head rise (m fluid column) . p = pressure (Pa, N/m 2). h = elevation (m). γ = ρ g = specific weight of fluid (N/m 3) . v = velocity (m/s). ρ = density of fluid (kg/m 3)

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  • ‘Head’ and ‘pressure’ in pumps | Water Tech Online

    2010-10-13 · If you need a pump to develop 30 psi of water pressure, then buy a pump that develops 70 feet of head. So, it turns out that back in 1965, the pump sales rep was trying to show me the correct pump for my application. Differential pressure. Allow me to refine a couple of points: Pumps develop differential head, or differential pressure.

    Get Price
  • Pumping Head Height Explained | Creative Pumps

    2021-5-14 · It's called Static head. It does not count as pumping height because the water is already at the surface and does not have to be pumped there. Maximum depth the pump can be located. depending on the pump there is a maximum depth that a pump will operate. The larger the pump the deeper it's suitable placement.

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  • Pump | Article about pump by The Free Dictionary

    pump, device to lift, transfer, or increase the pressure of a fluid (gas or liquid) or to create a vacuum in an enclosed space by the removal of a gas (see vacuum pumps under vacu

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  • Head coefficient | KSB

    The head coefficient (ψ) is a characteristic coefficient derived from the corresponding physical quantity according to the affinity laws and used to characterise the operating behaviour. It characterises the head (H) of the pump:. When the head varies at constant rotational pump speed, ψ ~ H. The head coefficient (ψ) is therefore indicative of the ordinate (analogous to H) on H/Q curves ...

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  • Motor Pump: Working Principle, Types, Specifications,

    Pump: Motor. Definition. The pump can be defined as it is a mechanical device used to convert torque from mechanical hydraulic. It simply makes possible of fluids movement from one location to another with the help of pressure or suction. Electric motors are electromechanical devices mainly used for changing energy from electrical to mechanical ...

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  • Understanding Net Positive Suction Head - Pump School

    2020-1-16 · the pump by atmospheric or head pressure (pressure due to the liquid’s surface being above the centerline of the pump). Consider placing a pump at the top of the mercury barometer above: Even with a perfect vacuum at the pump inlet, atmospheric pressure limits how high the pump can lift the liquid. With liquids lighter than mercury, this lift

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  • Head Rise and the Energy Equation - for Pump or Fan

    2021-5-7 · Actual Head Rise of a Pump or Fan. Using the Energy Equation the head rise through a pump or fan can be expressed as:. h a = (p 2 - p 1) γ + (h 2 - h 1) + (v 2 2 - v 1 2) 2 g (1). where. h a = actual head rise (m fluid column) . p = pressure (Pa, N/m 2). h = elevation (m). γ = ρ g = specific weight of fluid (N/m 3) . v = velocity (m/s). ρ = density of fluid (kg/m 3)

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  • How to Read a Pump Curve for Centrifugal Pumps |

    2018-9-24 · Centrifugal Pump curves show 8 important factors that are critical in selecting the right pump for your application. These factors are: Flow, Head, Impeller Trim Diameter, Efficiency, Power, NPSHR, MCSF (Minimum Continuous Stable Flow) and RPM. The Pump curve also displays the Pump model, the Pump size and number of stages for multi-stage pumps.

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  • Pump NPSH (Net Positive Suction Head) | Grundfos

    2021-5-13 · The NPSH curve following an NPSH calculation shows H (head) at the Y-axis and Q (flow) at the X-axis. NPSH will cause the lowest pressure inside the pump to decrease below the evaporation pressure of the pumped liquid, if the inlet pressure is too low. Consequentially, cavitation occurs in the pump, causing noise and leading to breakdowns.

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  • What is a Negative Head? - Definition from

    2015-1-5 · Negative head is a condition of negative pressure or vacuum which occurs when the pump outlet is at the same level or above the level of the cold water storage tank. In a negative head situation, the pressure from gravity is insufficient to provide flow at the outlet and the flow speed at the outlet is usually less than 1 liter/minute.

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  • Pump - definition of pump by The Free Dictionary

    Define pump. pump synonyms, pump pronunciation, pump translation, English dictionary definition of pump. pump1 top: jet pump bottom: centrifugal pump n. 1. A machine or device for raising, compressing, or transferring fluids.

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  • Pump Terminology Used for Pump Selection -

    Dynamic Suction Head: Used when calculating the static suction head minus friction head and velocity head. Dynamic Discharge Head: Used when calculating static discharge head, friction head plus velocity head into one computation. Flooded Suction: Liquid flows to pump inlet from an elevated source by means of gravity.

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  • Pump Efficiency - uaex.edu

    2014-4-16 · Total Head Total head is determined by measuring the distance from the source water surface to the output of the pump, as well as the pressure the pump is producing at the pump outlet. If this value is measured for a centrifugal pump, the distance from the water surface to the pump outlet needs to be measured as indicated in the following diagram.

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  • Head coefficient | KSB

    The head coefficient (ψ) is a characteristic coefficient derived from the corresponding physical quantity according to the affinity laws and used to characterise the operating behaviour. It characterises the head (H) of the pump:. When the head varies at constant rotational pump speed, ψ ~ H. The head coefficient (ψ) is therefore indicative of the ordinate (analogous to H) on H/Q curves ...

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  • Cylinder Head | Definition of Cylinder Head by

    2021-4-21 · Cylinder head definition is - the closed end of an engine or pump cylinder.

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  • Velocity head | KSB

    Velocity head is the kinetic portion of the head. In accordance with EN 12723, it is the kinetic energy of the fluid handled per unit weight. Alongside pressure head and geodetic height, the velocity head is determined in the Bernoulli equation (see Fluid mechanics) as follows: See Fig.1 and Fig. 2 Velocity head

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  • How to Read a Pump Curve for Centrifugal Pumps |

    2018-9-24 · Centrifugal Pump curves show 8 important factors that are critical in selecting the right pump for your application. These factors are: Flow, Head, Impeller Trim Diameter, Efficiency, Power, NPSHR, MCSF (Minimum Continuous Stable Flow) and RPM. The Pump curve also displays the Pump model, the Pump size and number of stages for multi-stage pumps.

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  • Understanding Net Positive Suction Head - Pump School

    2020-1-16 · the pump by atmospheric or head pressure (pressure due to the liquid’s surface being above the centerline of the pump). Consider placing a pump at the top of the mercury barometer above: Even with a perfect vacuum at the pump inlet, atmospheric pressure limits how high the pump can lift the liquid. With liquids lighter than mercury, this lift

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  • Pump Affinity Laws - Engineering ToolBox

    2021-5-7 · The Affinity Laws of centrifugal pumps or fans indicates the influence on volume capacity, head (pressure) and/or power consumption of a pump or fan due to. change in speed of wheel - revolutions per minute (rpm); geometrically similarity - change in impeller diameter; Note that there are two sets of affinity laws:. affinity laws for a specific centrifugal pump - to approximate head, capacity ...

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  • How to Read a Pump Performance Curve - March Pump

    2014-4-17 · As the diameter is reduced, the flow and head of the pump curve decreases as well. Another name for a reduced diameter impeller is a trimmed impeller. The standard impeller length is always the largest diameter, to obtain a smaller impeller size, the diameter must be specified. NOTE: The 50hz pump curve does less flow and head than the 60HZ ...

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  • Pump Head vs Discharge Pressure (Easy explanation

    2017-8-10 · During commissioning, an initial assessment the pump Head by reading the Discharging pressure gauge (P2 as above image, ex: 1 bar ~ 10 m height), and it’s not correct concept because of the Pump Head is not quite the same thing as a Discharge Pressure.. So what is the difference between pressure and head then?. While some pump manufacturers that use pressure (differential pressure …

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  • Fluid flow and pump head - definition of Fluid flow

    Fluid flow and pump head synonyms, Fluid flow and pump head pronunciation, Fluid flow and pump head translation, English dictionary definition of Fluid flow and pump head. n. The branch of fluid mechanics concerned with the movement of gases and liquids.

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  • HEADS AND EFFICIENCIES OF A CENTRIFUGAL PUMP

    2021-5-12 · Suction head is basically defined as the vertical distance between the centre line of centrifugal pump and the free surface of liquid (e.g. water) in the tank from which liquid is to be lifted. This vertical distance is also termed as suction lift.

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  • Pump head syndrome | definition of Pump head

    postperfusion syndrome A condition seen in 2% of Pts who undergo cardiac surgery, 3-7 wks after cardiopulmonary bypass, resembles infectious mononucleosis or hepatitis, and …

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  • pump - WordReference.com Dictionary of English

    pump - WordReference English dictionary, questions, discussion and forums. All Free.

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  • Pump Design - an overview | ScienceDirect Topics

    In summary, the head is a unit of energy and corresponds to the total head between the suction and discharge nozzles as defined by the Bernoulli equation. It is independent of the properties of the pumped medium, and for a given pump depends only on the flow rate and the peripheral speed of the impeller.

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  • Pump | Definition, Types, Applications [A Brief Guide]

    2018-12-8 · A positive displacement pump must not be operated against closed valves, because it does not have a shutoff head like a rotodynamic pump. Providing a safety valve is must in positive displacement pumps. Types of positive displacement pump. Following are the two main types of positive displacement pumps. Rotary positive displacement pumps ...

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  • Cognitive Impairment After Heart Bypass Surgery

    2020-4-10 · Pump head was a term used to describe impairment in a mental capacity they sometimes noticed in their patients following coronary artery bypass surgery. It got this name because the presumption was that cognitive impairment after bypass surgery was related to the use of the cardiopulmonary bypass pump during the procedure.

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  • Pump Efficiency—What Is Efficiency?

    2012-1-20 · H= Head (feet) The constant (3,960) converts the product of flow and head (GPM-feet) into BHP. These equations predict that a pump that produces 100 GPM at 30 feet of head and requires 1 BHP will have an overall efficiency is 75.7 percent at that flow point.

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  • Performance Characteristics of Centrifugal Pumps |

    2021-5-6 · Although the theory of centrifugal pumps gives many qualitative results, the most important indicator of a pump’s performance lies in extensive hydraulic testing.. In industry, characteristics of all pumps are usually read from its Q-H curve or performance curve (flow rate – height).As can be seen, the performance charts use a discharge – Q (usually in m 3 /h) and pump head – H ...

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