# pump datum definition

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• ### Pump Terms and Definitions

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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• ### Pumps - PetroWiki

2017-2-16 · Datum line is the centerline of the pump inlet connection, or the horizontal centerline of the first-stage impeller in vertical pumps. Fig. 3—Relationship between static head, static lift, and submergence. Theoretical lift. A pump that develops a perfect vacuum at its suction end can lift a column of water 34 ft. This vertical distance is ...

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• ### SUBMERSIBLE SOLIDS HANDLING PUMPS

2019-8-26 · referenced. The datum for a horizontal pump is the center line of the pump shaft. For a vertical pump the datum is normally the center line of the volute. Head (H) The energy level in the fluid at the location specified, referenced to the datum. The head of a pump is usually expressed in feet and is so plotted on most pump curves.

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• ### Datum Surface - an overview | ScienceDirect Topics

1/m. Surface : volume ratio. S′v. Equation. S′v = 2(εa/ε)(εfδ/Rf) ⋅ C * (T) 1/m. Sv′=2εa/εεfδ/Rf⋅C*T. There is another example: data of fabric mechanical (weft tensile modulus EA) stored in database. Sometimes it can be measured to get the result in value, figure, and table style.

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• ### Centrifugal Pump Head|Formulae, Equations, Basic

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 a total static head.

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• ### What is NPSH? | Pumps & Systems

2011-12-17 · Add atmospheric pressure, add (or subtract) the liquid level above (below) datum, subtract all losses from the tank to the pump and subtract vapor pressure. With reciprocating pumps it is also necessary to subtract acceleration head, a term which will be explained later.

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• ### UNDERSTANDING NPSH & Cavitation

2020-1-2 · above datum) or subtracted (if the gauge is below datum). Although often negligible, the velocity head in the pipe at the gauge connection should be added to obtain total (stagnation) pressure. For a reciprocating pump (and some rotaries), the acceleration head must be subtracted. (More on acceleration head later.) Vapor Pressure: The Second

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• ### Selection of pump - SlideShare

2021-1-26 · The datum axis acts as an anchor for the tolerance zone in circular runout. The callout creates a 2D circular tolerance zone around the specified datum axis. The ideal surface of the feature lies in this tolerance zone. In order to meet this callout, all points on the actual surface must lie in this zone.

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• ### Circular Runout (GD&T) Explained | GD&T Symbols |

2014-3-11 · Pump Performance Curves that shows how pump performs at given conditions when tested with water. Tabulated Engineering data on pumps include (this may vary with companies); • Suitable Casing Size for Pump • Weight of Casing • Stage Type (Radial or Mixed) • Best Efficiency Producing (BEP) rate • Motor, Seal Section and Pump

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• ### Centrifugal Pump Head|Formulae, Equations, Basic

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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• ### The Mathematics of Pumping Water - Royal Academy of ...

2014-5-14 · pump will need to overcome a system pressure of 10.39 m. At the top level, the pump will only need to overcome a system pressure of 6.79 m. If a centrifugal pump were selected to achieve either the maximum or minimum head condition, this would likely result in either too much or too little

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• ### What is the difference between pressure and head?

2016-5-31 · The pump selection of a pump is driven by the following main parameters: – Head (H) – Flow rate (Q) – Fluid characteristics (ρ, γ, T ….) Sometimes head can be confused with pressure during pump choice. As a matter of fact there is a strict relation between them which is defined by the fluid specific gravity, so the relation is fluid dependent.

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• ### Electrical Submersible Pumping (ESP) Systems

2014-3-11 · 5 Pump Type Select pump that has highest efficiency based on desired flow rate 6 Optimum Size of Components Select optimal size of pump, motor, seal section and ... Static Bottom hole pressure, Datum point, Bottom-hole temperature, Desired production rate, Gas-oil ration, Water cut.

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• ### Engineering Bernoulli Equation - Clarkson University

2014-7-3 · exit of the pump, because it would unnecessarily add to the calculational burden. Now list all the known information at the two locations. p 1 =0 gage (Open to atmosphere) V 1 =0 (Large cross-sectional area) z 1 =0 (By choice of datum) From the given discharge rate and the diameter of the pipe at the absorber inlet, we can calculate . V 2. ( ) 3 2

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• ### Hydraulic Gradient - an overview | ScienceDirect Topics

The hydraulic gradient (1) is the slope of the water table or potentiometric surface, that is, the change in water level per unit of distance along the direction of maximum head decrease. It is determined by measuring the water level in several wells. The water level in a well (Fig. 3-11), usually expressed as feet above sea level, is the total head (ht), which consists of elevation head (z ...

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• ### Understanding Net Positive Suction Head

2012-6-20 · In pump hydraulics, suction refers to the inward movement of liquid through a conduit, such as a section of pipe, into the pump and ultimately to the eye of the impeller. Suction is the negative pressure induced by the rotating impeller that draws the pumped liquid to a point such that energy may be imparted to it from the impeller vanes.

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• ### Vacuum Measurement: A Basic Guide - Fluid Power

2016-12-19 · Therefore, 29.92 inches converted to millimeters is 760 (759.97). A system running at 50% vacuum is either 380 Torr or 15″Hg. However, the torr measurement scale is more accurate as it has with a datum point of zero atmospheric pressure. 15″Hg is a …

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• ### International Economics Glossary: P

Price definition A way of defining relative factor abundance from factor prices in autarky: Compared to country B, country A is abundant in factor X relative to factor Y iff w X A /w Y A w X B /w Y B, where w I J is the autarky price of factor I in country J, I=X,Y, J=A,B. Also known as the 'Ohlin definition,' as it was used by Ohlin (1933).

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• ### How Does a Hydraulic Ram Pump Work? — Practical

2019-12-17 · This is the definition of water hammer. Slamming a valve shut converts all that kinetic energy nearly instantly creating a huge spike in pressure that can lead to stress and damage in pipe systems and connected equipment. In the case of the ram pump …

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• ### Centrifugal Pump Head|Formulae, Equations, Basic

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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• ### Datum Surface - an overview | ScienceDirect Topics

Table 15.8 shows an example that data ‘Surface:volume ratio’ stored in database. Here, the surface:volume ratio is the woven fabric’s physical data; this data is very typical. When it is a real value, it is about 1000/m; however, it can be described in an equation, and the importance of this is that, when the design is begun, it has an initial value, but when the design process is ...

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• ### Water Hammer - KSB

datum, (e.g. mean sea level, axi-al centreline of pipe and pipe crown etc.). As a rule, system designers start by determining the steady-state operating pressures and volume rates of flow. In this context, the term steady2 means that volume rates of flow, pressures and pump speeds do not change with time. Fig. 2.1-a shows a typical steady flow ...

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• ### Circular Runout (GD&T) Explained | GD&T Symbols |

2021-1-26 · Examples include pump shafts and automobile transmissions. Important Points to Remember. Circular runout requires a datum, unlike circularity. So remember to mention the datum on your callout. Circular runout is always understood as a 360° rotation around the datum axis and hence, is used without a diameter symbol in the feature control frame.

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• ### THE PRINCIPLE OF SUPERPOSITION AND ITS

2011-11-10 · A general definition of model is a representation of some or all of the properties of a system. Developing a 'conceptual ... In example a, the river stage is at datum, and the canal stage is 200 ft above datum; in example b, the river stage is 50 ft above datum, and the canal stage is at datum. ...

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• ### The Mathematics of Pumping Water - Royal Academy of ...

2014-5-14 · pump will need to overcome a system pressure of 10.39 m. At the top level, the pump will only need to overcome a system pressure of 6.79 m. If a centrifugal pump were selected to achieve either the maximum or minimum head condition, this would likely result in either too much or too little

Get Price
• ### Selection of pump - SlideShare

2012-3-13 · Selection of pump 1. Pumping System A major ancillary itemConsiderations1. ... NPSH Definition Hydraulic institute defines net positive suction head (NPSH) as follows: The net positive suction head in feet of liquid absolute determined at the suction nozzle and referred to datum less the vapor pressure of the liquid in feet absolute (This ...

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• ### Hydraulic Machines CH5 Pumps - Philadelphia University

2021-3-1 · pump types can be broadly classified as (a) rotodynamic pump, and (b) positive-displacement pump. In a rotodynamic type of pump, also called dynamic pump, a rotary element known as impeller, imparts energy to the liquid. The impeller itself is driven by a …

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• ### What You Need to Know About NPSH | Pumps &

2018-2-26 · Editor’s Note: In 2009 and 2010, Pumps & Systems published a 14-part series of articles by Terry Henshaw called “Understanding NPSH.” Sadly, Henshaw passed away in 2017. We at Pumps & Systems are grateful for his contributions to the education of the rotating equipment industry, especially on a topic as complex as NPSH. The following is a selection from that series.

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• ### The Schlumberger Oilfield Glossary | Oilfield Glossary

The oil and gas industry's reference work. Since 1998, the Oilfield Glossary has been helping technical generalists and experts alike increase their understanding of oilfield activities.

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• ### Water Hammer - KSB

datum, (e.g. mean sea level, axi-al centreline of pipe and pipe crown etc.). As a rule, system designers start by determining the steady-state operating pressures and volume rates of flow. In this context, the term steady2 means that volume rates of flow, pressures and pump speeds do not change with time. Fig. 2.1-a shows a typical steady flow ...

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• ### Engineering Drawings: Detail Drawings

2014-5-20 · end of the dimension line infers that this is a datum surface. The other tolerance refers to the hole diameter. Surface Texture or Roughness . Symbols which indicate the surface texture of roughness that a component or a particular feature of a component requires must be inserted.

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• ### Engineering Bernoulli Equation - Clarkson University

2014-7-3 · exit of the pump, because it would unnecessarily add to the calculational burden. Now list all the known information at the two locations. p 1 =0 gage (Open to atmosphere) V 1 =0 (Large cross-sectional area) z 1 =0 (By choice of datum) From the given discharge rate and the diameter of the pipe at the absorber inlet, we can calculate . V 2. ( ) 3 2

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• ### THE PRINCIPLE OF SUPERPOSITION AND ITS

2011-11-10 · A general definition of model is a representation of some or all of the properties of a system. Developing a 'conceptual ... In example a, the river stage is at datum, and the canal stage is 200 ft above datum; in example b, the river stage is 50 ft above datum, and the canal stage is at datum. ...

Get Price
• ### Electrical Submersible Pumping (ESP) Systems

2014-3-11 · 5 Pump Type Select pump that has highest efficiency based on desired flow rate 6 Optimum Size of Components Select optimal size of pump, motor, seal section and ... Static Bottom hole pressure, Datum point, Bottom-hole temperature, Desired production rate, Gas-oil ration, Water cut.

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• ### Concentricity | GD&T Basics

GD&T Symbol: Relative to Datum: Yes MMC or LMC applicable: No Drawing Callout: Description: Concentricity, sometimes called coaxially, is a tolerance that controls the central axis of the referenced feature, to a datum axis. The axes for the datum and referenced feature are derived from the median points of the part or feature. Concentricity is...

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• ### Selection of pump - SlideShare

2012-3-13 · Selection of pump 1. Pumping System A major ancillary itemConsiderations1. ... NPSH Definition Hydraulic institute defines net positive suction head (NPSH) as follows: The net positive suction head in feet of liquid absolute determined at the suction nozzle and referred to datum less the vapor pressure of the liquid in feet absolute (This ...

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• ### API Standard 610 - Centrifugal Pumps for Petroleum ...

2010-8-25 · Question 2: Please clarify the definition of 'small pumps' in Clause 5.1.14 with reference to flow, head, and BKW. Reply 1: Yes. Reply 2: The definition of “small” in this case is left to the purchaser. 610 9th - Jan. 2003 5.1.22 610-I-01/03 Please clarify the purpose and source of the cooling water system design

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• ### Chapter 5: Tolerancing of Cones | Engineering360

2021-5-14 · axial location of the cone relative to a datum; distance of an end face of the truncated cone relative to another face. The first three characteristics (deviations) may be toleranced either together (in common) by the profile tolerance of the cone ( t in Fig. 5.3), or separately by different tolerances (Figs 5.4 to 5.10).

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• ### Centrifugal Pump Piping Design Layout

Layout arrangement for Centrifugal Pump Piping 1. GENERAL. The design of a piping system can have an important effect on the successful operation of a centrifugal pump.Such items as pump design, suction piping design, suction and discharge pipe size and pipe supports must all be carefully considered.

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• ### bottomhole pressure | Oilfield Glossary

2. n. [Well Testing] The pressure measured in a well at or near the depth of the producing formation.For well-test purposes, it is often desirable to refer the pressure to a datum level chosen at a reference depth by calculating the pressure that would occur if the pressure measurement were made at the datum level rather than at the actual depth of the gauge.

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• ### Rotodynamic (Centrifugal) Slurry Pumps for

2007-11-23 · Title: Rotodynamic (Centrifugal) Slurry Pumps for Nomenclature, Definitions, Applications, and Operations - ANSI/HI 12.1-12.6: 2005 …

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• ### Motor Driven Pump - How is Motor Driven Pump

mDP - Motor Driven Pump. Looking for abbreviations of mDP? It is Motor Driven Pump. Motor Driven Pump listed as mDP. Motor Driven Pump - How is Motor Driven Pump abbreviated? ... Meteorological Datum Plane: mDP: Mort de Peur (French: Fear of Death) mDP: Mexicano Del Pacifico (railroad) mDP: Management Data Provider: mDP:

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• ### Glossary - AAPG Wiki

2019-3-18 · POP put on pump put on pump PPP pinpoint [[porosity]] pinpoint porosity PU pulling unit pulling unit RBP retrievable bridge plug retrievable bridge plug RD rig down rig down RGE range range RIH running (ran) in hole running (ran) in hole RKB relative to kelly bushing relative to kelly bushing RM ream ream RO reversed out reversed out ROI return ...

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• ### Coordinate Measuring Machines (CMM) Selection

Measurement Capabilities . CMMs can be designed to perform different types of measurement. These include: Dimensional measurements are sizing measurements made in the x, y, and z directions.; Profile measurements are made to capture information about the form or profile of an object. These measurements may be 2D or 3D, depending on the machine capabilities.

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• ### คำศัพท์วิศวกรรมคำว่า datum level ...

datum level ความหมายคือ ระดับที่ใช้ในการคำนวณหรือทำสถิติ Engineering (คำศัพท์วิศวกรรม) Dictionary ความหมาย คำศัพท์เฉพาะ

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• ### Fuel system of HFO Plant - SlideShare

2016-6-20 · Including air driven pump, solenoid valve and air filter. NTC: Nozzle temperature control system: The nozzle temperature control excluding tanks system is an internal system on the Engines. 104 DO valve: The purpose of the three way valve is to restrict the mixed oil (HFO+LDO) from entering into Diesel Service tank during engine fuel changeover ...

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• ### Free and Forced Vortices - Seoul National University

2018-4-20 · Free & Forced Vortices ObjectivesObjectives Chapter 3. Free and Forced Vortices Avortexcanbeseeninthespiralingmotionofairorliquidaroundacenterofrotation.

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