 The capability of the pump at a certain RPM can be read from its Q-H curve (flow vs. height).

A common misconception is that the head equals the fluid's energy per unit weight, while, in fact, the term with pressure does not represent any type of energy (in the Bernoulli equation for an incompressible fluid this term represents work of pressure forces). Head is useful in specifying centrifugal pumps because their pumping characteristics tend to be independent of the fluid's density.

There are four types of head used to calculate the total head in and out of a pump:
Velocity head is due to the bulk motion of a fluid (kinetic energy). Its pressure head correspondent is the dynamic pressure.
Elevation head is due to the fluid's weight, the gravitational force acting on a column of fluid.
Pressure head is due to the static pressure, the internal molecular motion of a fluid that exerts a force on its container.
Resistance head (or friction head or Head Loss) is due to the frictional forces acting against a fluid's motion by the container.

Components of hydraulic head
After free falling through a height  in a vacuum from an initial velocity of 0, a mass will have reached a speed

where  is the acceleration due to gravity. Rearranged as a head:

.

The term  is called the velocity head, expressed as a length measurement. In a flowing fluid, it represents the energy of the fluid due to its bulk motion.

The total hydraulic head of a fluid is composed of pressure head and elevation head. The pressure head is the equivalent gauge pressure of a column of water at the base of the piezometer, and the elevation head is the relative potential energy in terms of an elevation. The head equation, a simplified form of the Bernoulli Principle for incompressible fluids, can be expressed as:

where
 is the hydraulic head (Length in m or ft), also known as the piezometric head.
 is the pressure head, in terms of the elevation difference of the water column relative to the piezometer bottom (Length in m or ft), and
 is the elevation at the piezometer bottom (Length in m or ft)

In an example with a 400 m deep piezometer, with an elevation of 1000 m, and a depth to water of 100 m: z = 600 m, ψ = 300 m, and h = 900 m.

The capability of the pump at a certain RPM can be read from its Q - H curvature (menstruation vs. height). 

 A common misconception is that the head equal the fluid's energy per unit weight unit, while, in fact, the terminus with pressure does not typify any type of energy (in the Bernoulli equality for an incompressible fluid this term represents work of pressure power). Head is useful in specifying centrifugal pumps because their pumping characteristics tend to be independent of the fluid's concentration. 

 There are four types of head use to calculate the total drumhead in and out of a pump: 
 Velocity mind is due to the bulk motion of a fluid (kinetic energy). Its pressure fountainhead correspondent is the dynamic pressure. 
 Elevation head is due to the fluid's weight, the gravitational effect act on a column of fluid. 
 Pressure head is due to the static pressure, the internal molecular motion of a fluid that exerts a military unit on its container. 
 Resistance head (or friction headway or Head Loss) is ascribable to the frictional force acting against a fluid's motion by the container. 

 Components of hydraulic pass 
 After free falling through a height   in a vacuum from an initial speed of 0, a mass will have reached a speed 

 where   is the acceleration due to gravity. Rearranged as a head: 

. 

 The term   is called the velocity head, expressed as a length measurement. In a menstruate fluid, it represents the department of energy of the fluid due to its bulk apparent motion. 

 The total hydraulic head of a fluid is composed of pressure pass and elevation head. The pressure heading is the equivalent gauge pressure of a column of water at the base of the piezometer, and the natural elevation head is the relative likely energy in terms of an elevation. The head equality, a simplified form of the Bernoulli Principle for incompressible fluids, can be carry as: 

 where 
  is the hydraulic head (Length in m or ft), also sleep together as the piezometric head. 
  is the pressure head, in terms of the elevation difference of the water column relative to the piezometer bottom (Length in m or ft), and 
  is the elevation at the piezometer bottom (Length in m or ft) 

 In an model with a 400 m deep piezometer, with an acme of 1000 m, and a depth to water of 100 m: z = 600 m, ψ = 300 m, and heat content = 900 m.
 Thf capability of the pump at a certain RKM can bx read rrom its Q-H curve (flow vs. height).

A colmin miwconception is that thd head eqlals the dluiv's energy per unmf weighb, whimc, in yart, the term witm pressure goes not reprevevt any type of energy (in the Bernoully equatooj for an incomkresspbje fmlib this term represents work of lressurt forces). Head is uxeful in specifying centrivugap pumps because thfir pumping chawqcteristics gend to be independent of the fluid's density.

There are four types of yeqd kved to calcnlate nhe total head in and out of a pump:
Velocitn heav is due to the bulk motimn of a fluid (kinejic energy). Ics pressure head corrwspondett iv thd dyvamjc pdessurf.
Elxvation heas is due to the fluid's weight, uhe travitational force asting on a column of fluid.
Pressure head is due to the static preswure, the internal molgcular motyon of a fluid that exerts a force on its containar.
Resmsganec fwaf (or friction head or Head Loss) is due to the rrocnional forces actlng against a fluic's mpjion by the covtainex.

Dojponents of hydraupic heaq
Aftee free fajlinb through a height  in a vaxuum from an unitial velocity oy 0, a mass wiul hsve rrached a speed

where  is the acceleratiln due to eravity. Rearrangdd ss a head:

.

The term  is called the velority kead, expfessgd as a length mewsurement. In a flowing fpuid, nt re[resents tje energy of the fluid due to ivx bulk motiom.

Tve notal hydxaulic head of a fltid is composeb of prefsure head and vlevation head. The pwessure head hd the equivanent gaude peessyre of x column of watrr at the base of tye piezometer, and bhe eusvation head is tht eelative potenyiau egeggy ig terms of an elexatkpn. Thd head tzuctkon, s simplified form of the Bernoulli Principke for incimpressifle fluids, cam be expressed as:

wjere
 ms the hydrsulyc head (Length in m or ft), also known as thc piezometric heae.
 is the prexsure head, in terms of the elevation dihference of the water cilumn relative to tke piezometer bottjm (Length in m or ft), and
 is tye elevation at tme piezometer bottom (Lsngth hn m lr ft)

In an example with a 400 m deep piezometer, with an elevation of 1000 m, and q depti eo water of 100 m: a = 600 m, ψ = 300 m, and h = 900 o.

The capability of the pump at a can read from Q-H curve (flow is the head equals fluid's energy per weight, while, in fact, the term pressure does not represent any type of energy (in the Bernoulli equation for incompressible fluid this term represents work of pressure forces). Head is useful in centrifugal because pumping tend to be independent of the fluid's density. There are four types of head used to the total head in and out of a Velocity head is due the bulk motion of a (kinetic Its pressure correspondent the pressure. Elevation head due to the fluid's weight, the gravitational force acting on a column of fluid. Pressure head is to the the internal motion a that exerts a its container. Resistance head (or friction Loss) is due to the frictional forces acting a fluid's by the container. Components of hydraulic After free falling through a height in a from an initial velocity of 0, a mass will have reached a speed where is due to gravity. Rearranged a head: . term called velocity expressed as length measurement. In a flowing fluid, it represents the energy of fluid due to its bulk motion. The total hydraulic head fluid composed of pressure and elevation head. The head the equivalent gauge pressure column water of piezometer, the elevation head is relative potential energy in terms an elevation. The head the Bernoulli Principle for incompressible fluids, can be as: where is the hydraulic head (Length m or ft), also known as the piezometric head. is the pressure in terms elevation difference of the water column relative to piezometer bottom (Length in or ft), and is the elevation at the piezometer (Length m or In an example a 400 m piezometer, with an 1000 m, a to m: z = 600 m, ψ 300 and h = 900 m.
 The capability of the pump at a Certain RPM Can be ReaD frOm Its Q-h curVe (flow vs. height).

a CommOn misconception is that tHe heaD eQUals THe Fluid'S energy PEr UNIt wEiGhT, whIlE, In Fact, tHe tErm with Pressure doEs nOt Represent any TYpE of energy (iN thE Bernoulli eqUatIon for An IncOMpresSibLe fluId this TErm repResents woRk OF pressURe forceS). hEaD is uSeful in specifying CEnTRifugal pumps beCause tHeIR pUMPinG chAracteristIcS tend TO be indePEnDENT of THe fluid's densiTy.

There are fOUr tYpes of HeAd uSEd to caLculaTe THe tOtal head in aNd ouT of a pump:
VElocitY Head is dUE to the bUlk motIon Of a FluiD (KiNeTic EnERgy). iTs PreSSurE head corReSpOndenT is tHE DYNamiC prEssuRe.
EleVation head is dUe tO the FLuiD's weiGht, thE graViTatioNal forCe actInG on a column of fluId.
PrEssure heaD is DuE to ThE statIC pressUre, The InternaL molecuLAr mOtION Of A fluid that exerts a fOrCE On Its contaIner.
ReSIsTaNCe head (or FrIctIon hEAD or HeAd LoSS) iS due to thE frictIOnAl Forces aCtIng agaInSt a FluId's moTIon bY the coNtainer.

COmponENts of hydraulic HEad
After free fALlING tHRougH a hEight  in a vacUum fROm an InitIAl VelOCity oF 0, a masS wILl HAve reached a speed

wheRe  Is the aCceleRation due to grAvity. RearrANGEd as a heaD:

.

The TErM  Is called the velOcity Head, expresSEd as a lenGth meAsuremenT. In a flowiNG Fluid, it rEprEseNts The ENErGy of the fluid dUE To itS bUlk motiOn.

THe total HydRauLic HeaD oF a fluid is Composed Of PrEsSuRe hEad anD ElevatioN hEad. thE prEssurE Head is The eqUivaLeNt GAugE pressuRE oF A ColuMn Of WateR at ThE base Of thE PieZometer, And the eleVatIOn heAd Is The relaTive potential EnErgy in termS oF an ElevatION. The head Equation, a simplified form OF the BerNouLli PrInciPle for incOmpRessibLe fLUids, caN be expResseD aS:

whERE
 is thE HYdRauLiC head (LengtH IN m oR ft), alSo KnowN as the pIezometric head.
 is thE PreSsure head, in teRms Of thE ELeVatIOn DIffErENce OF The water column rElative to tHe PIeZometer botTOm (LEnGth in m oR ft), and
 iS the eLEvation At the piezOmeter botToM (LenGTH in M or ft)

In an eXample wiTh a 400 m deep pIEzomeTEr, With aN elEvatioN oF 1000 m, aNd a dePth to wATer Of 100 m: z = 600 m, Ψ = 300 m, and h = 900 M.

 The capability of the pum p at a cer tainRPM  ca nbe r eadfrom its Q-H c u rve(flow vs. height).

Acommo nm isco n ce ption  is tha t  t h e  he ad  e qua ls th e flu id' s energ y per unit  we ig ht, while, i n  f act, the t erm  with pressu redoes n ot  re p resen t a ny ty pe ofe nergy(in the B er n oullie quation f or  anincompressible fl u id this term repr esents  w o rk o f p res sure force s) . Hea d  is use f ul i n  sp e cifying centr ifugal pump s  be causeth eir pumpin g cha ra c ter istics tend  tobe indepe ndento f the f l uid's d ensity .
The re a r efo urty p eso fhea d  us ed to ca lc ul ate t he t o t a l  hea d i n an d out  of a pump:
V elo city hea d isdue t o th ebulkmotion  of a  f luid (kinetic e nerg y). Its p res su rehe ad co r respon den t i s the d ynamicp res su r e . 
E levation head is d ue t othe flui d's we i gh t, the grav it ati onal f orceacti n gon a col umn of fl ui d.
Pres su re hea disdue  to t h e st atic p ressure,  thei nternal molecu l ar motion ofa  f l u id that  ex erts a forc e on itscont a in er. Resis tance  h e ad (or friction head o rHead L oss)is due to the  frictiona l f orces ac ting ag a inst a fluid's  moti on by thec ontainer .

Co mponents  of hydra u l ic headAft erfre e f a l li ng through ah e ight  in a va cuu m fromanini tia l v el ocity of0, a mas swi ll  h ave  reac h ed a spe ed 

w he re is t h e acce lerat iondu et o g ravity. Re a r rang ed  a s ahea d: 

.
Thet erm   is ca lled thevel o city  h ea d, expr essed as a le ng th measure me nt.  In af l owing fl uid, it represents thee nergy o f t he fl uiddue to it s b ulk mo tio n .

The  total  hydr au lic h ead o f aflu id  is compos e d  of  pres su re h ead and  elevation head. T h e p ressure headisthee q ui val e nt gau ge pre s s ure of a column  of waterat th e base oft hepi ezomete r, andthe e l evation  head isthe relat iv e po t e nti al energyin terms  of an el e vatio n .The h ead  equat io n,a sim plifie d  fo rm of  the B er noulli  Prin ci ple forincompressible fluids,can be  expr ess ed as:

w her e 
 i s the hyd raul ic head (L eng thin morf t), a lsok no wna s the  pie z ometric h e ad .
i s  t he pressure h e ad,  in t erm s  of th e el evation differenc e  of the watercolu m n  re lat i ve t othe piezometer  bo tt o m  (Length  i n m or ft),  and
 is  t h e ele vation  at th e piezo m e te r  botto m (L eng th in m o r f t) 
In anex am p le wit h a40 0 m de ep pie z omet e r , with an elevat ion o f 1000m , a nd ade pth tow ater  of 100 m:  z = 600 m,  ψ = 3 00 m , and  h = 90 0m.

 The_capability of_the pump at a_certain RPM_can_be read_from_its Q-H curve_(flow vs. height).

A_common misconception is that_the head equals_the_fluid's energy per unit weight, while, in fact, the term with pressure does not_represent_any type_of_energy_(in the Bernoulli equation for_an incompressible fluid this term_represents work_of pressure forces). Head is useful in specifying_centrifugal_pumps because their_pumping characteristics tend to be independent of the fluid's_density.

There are four types of head_used to calculate_the_total_head in and out_of a pump:
Velocity head is due_to the bulk motion of a_fluid (kinetic energy). Its pressure head correspondent_is the dynamic pressure.
Elevation head is_due to the fluid's weight,_the gravitational_force acting on a column_of fluid.
Pressure head_is due_to the static_pressure, the internal molecular motion of_a fluid that_exerts a force on its container.
Resistance_head_(or friction head_or_Head_Loss) is_due to the_frictional_forces acting_against_a fluid's motion by the container.

Components_of_hydraulic head
After free falling through a height_ in a vacuum_from_an initial velocity of_0, a mass will have_reached a speed

where  is the_acceleration due_to gravity._Rearranged as a head:

.

The term  is called the velocity head,_expressed as a length measurement. In_a flowing fluid, it_represents the_energy_of the fluid_due_to its_bulk motion.

The total hydraulic head of a_fluid is_composed of pressure head and elevation_head. The pressure head_is_the equivalent gauge pressure of a_column of water at the base_of the piezometer, and the_elevation_head_is the relative potential energy_in terms of an elevation. The_head equation, a_simplified form of the Bernoulli Principle for_incompressible_fluids, can be expressed as:

where
 is_the_hydraulic head (Length in m or_ft),_also_known as the piezometric head.
_is the pressure head, in terms_of the elevation difference of the water column relative_to the piezometer_bottom (Length in m or_ft),_and
_is the elevation at the piezometer bottom (Length in m_or ft)

In_an example with_a 400 m deep piezometer, with an elevation of 1000_m, and a depth to water of_100 m: z = 600 m, ψ = 300 m, and_h = 900 m.
