Pump Rules New

8/8/2019 Pump Rules New

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CENTRIFUGAL PUMPS: Date: 22/07/20

ATTRIBUTES

TYPE:

1.Radial Flow:

2.Axialflow:

3.Mixed Flow:

STAGE:

1.Single stage:

2.Multi stage:

Multiple Pumps:


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IMPELLER TYPES:

IMPELLER :

1.Axial Flow Fan Turbine

2. Axial Flow Pitched Blade

3.Axial Flow Propeller:

4. Screw Centrifugal

5. Open Radial Vane

6. Semi open Radial Vane

7. Closed Radial Vane


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8. Vortex

9. Radial Flow Anchor

10. Radial Flow Paddle

11. Radial Flow Turbine

12. Helical

13.Hydrofoil

14. Mixed Flow

15. Rotating Coil

16. Other

SUCTION:

1.Single suction


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2.Double suction:

PITCH:

1. Fixed

2.Variable

PRIMING:

1. Self priming

2. Non priming

PARAMETERS

1. Flow rate:

2. Pump Head:

3. NPSHa:

4.Total suction head:

5. Total discharge head:

6. Frictional head:

PUMP STANDARDS

1. NEMA


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2. IEC


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REMARKS

In a radialflow pump,the liquid

enters at thecenter of theimpeller andis directed outalong theimpellerblades in adirection atright angles tothe pumpshaft

In an axial flow pump, the impellerpushes the liquid in a direction parallelto the pump shaft. Axial flow pumps aresometimes called propeller pumpsbecause they operate essentially thesame as the propeller of a boat.

Mixed flow pumps borrow characteristics

from both radial flow and axial flowpumps. As liquid flows through theimpeller of a mixed flow pump, theimpeller blades push the liquid out awayfrom the pump shaft and to the pumpsuction at an angle greater than 90o

Should be visible if only one stage ofpumping is required. Should be the default

Should be displayed if more than one stageof pumping is required. That means whenuser requires a high pump head with asmall pump

Multiple pumps simply means a pump withmultiple impellers so that it can attain morehead than it would have got with singleimpeller


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Impeller can be defined as the active part ofa pump. It is the only moving part of a

pump so that by virtue of its rotation, thevelocity of liquid increases and it makes it

easy to move/ transfer the liquid in todesired heights

Impellers that have multiple fins and convey thepumped media in the direction along the revolving axisof the impeller. Axial flow impellers are used at highspeeds to promote rapid dispersion and are used atlow speeds for keeping solids in suspension. Used forboth mixing and air circulation applications.

Used for Mixing. Impellers that have one or morepaddles. They convey pumped media in the directionalong the revolving axis of the impeller. Axial flowimpellers are used at high speeds to promote rapiddispersion and are used at low speeds for keepingsolids in suspension.

Impellers that have 2 to 4 blades and convey thepumped media in the direction along the revolving axisof the impeller. Axial flow impellers are used at highspeeds to promote rapid dispersion and are used atlow speeds for keeping solids in suspension. They aretypically of one-piece construction

An Impeller used within a pump used for pumping

liquid with solid objects and fibrous materials. Theimpeller has a single blade, axially extended at the inletand developed around its axis much like a corkscrew.Linking this to a centrifugal outlet allows pumping withthe minimum of agitation and shear

An Impeller used within a pump used for pumpingliquid or air. Typically seen on smaller pumps and areused to pump liquids with stringy materials within.These impellers are vanes mounted to hubs.

An Impeller used within a pump used for pumping

liquid or air. A full shroud is on one side of the vanes.The shroud increases the structural strength of theimpeller

An Impeller used within a pump used for pumpingliquid or air. A full shroud is on both sides of thevanes. The shrouds increase the structural strength ofthe impeller.


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Other unlisted, specialized, or proprietary impeller type.

An Impeller used within a pump used for pumpingliquid. With a vortex pump, flow through the hydraulicunit is produced not by the actual impeller, but ratherby a rotating vortex created by the impeller. Becausethe pumping action is created by the vortex, particles inthe liquid do not come in contact with the impeller itself.

Used for mixing. An impeller designed for mixinghigher viscosity products. An anchor is normally "U"shaped, and follows the contour of the tank. Anchorimpellers are specifically designed to fit the process.Anchor impellers are used to sweep the entireperipheral area of a tank - both walls and bottom.

Used for mixing. Impellers that convey the mediaoutward to the side of the tank. Larger slow-speedimpellers, with two to four blades are known aspaddles. Paddles are used at slower speeds oftenused for large scale mixing of solid/ liquid suspensions.

Used for mixing. Turbines are the multi-bladetype Impellers that convey the media outward to theside of the tank. Turbines, which come in a variety oftypes, provide excellent circulation of fluid throughoutthe mixing vessel.

Used for mixing. Helical impellers have a blade thatact like an auger and a blade that fully sweeps thebottom and sides of the vessel. Helicalimpellers provide maximum agitation of the full volumewith the least torque and stress. Provides thoroughmixing of highly viscous compounds.

High efficiency axial flow blade assembly.

Mixed flow impellers provide mixing in both radial andaxial direction. There is an assortment ofconfigurations under this category.

Coil (spring) shaped impeller mounted perpendicular tothe impeller shaft. Provides a multi-directional flowpattern resulting in non-splashing action, faster mixingcycle times, reduced motor size and lower powerconsumption.

Should be used I only one side suction isrequired. Should be default


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Should be used if 2 side suction is required.Uses for large flow pumps

should be the default except for mixingimpeller types

Should be the default only for mixing typeimpellers

Should be displayed for pumps with selfprimming ability

Should be displayed for those pumps whichwants to be primmed from outside

It is the amount of liquid that a pump canmove/transfer at a time

It is the maximum height, up to which thepump can move the liquid

It is the minimum amount of suctionrequired to avoid cavitation. It may definedas the total suction pressure less by thevapour pressue head of fluid

It is the total head generated by the pumpat the suction side

It is the total head generated by the pumpat the discharge side

its the head created due to the frictionalforce in the pipes & connected equipments

NEMA stands for national electrical

manufactures association. This system iscommonly used in canada & mexico. Herethe pump power is reffered in horsepower(HP). & maximum vltg variationallowed is +_ 10% & maximum frequencyvariation allowed is +- 5%


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IEC stands for International electrotechnicalcommission. This system is used worldwide. And it should be default. Here thepump power is refferd in Kilo Watt(kW). Andthe maximum vltg variation allowed is +-5% & maximum frequency variation allowedis +-2%


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Note 1 : Here we are providing 2 options for the user to select the pump.

Note 2:

1. First option is the quick selection. Here the user is directed toprovide the required flow rate, pump head & NPSHa.And once the userentered his values, this values are compared with that of pumps indatabase.Hence it will produce a list of matching pumps, from whichuser can select the desired one.

2. In the second option, that is advanced selection, the user maydirected to enter their system data such as pipe dia, pipe length, fluid,suction lift, discharge lift, connected equipments,etc.. Then weprovides some calculation to produce the pump head & flow rate. Andthen this values are comparing with that of values in database. Andshows the list of matching pumps from which the user can select theright one

Reference ; Pump selection software. Pump-flow .com


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START

QUICK


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ADVANCED


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This portion is copied from vapour pressure calculation for V


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Yes

Yes No

Yes

Yes

Yes


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ALVE SPEQ


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No

No

No


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YES


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NO


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NOTE: APPLICATION


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NO YES

YES


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WISE PUMP SELECTION IS ALREADY DONE . So here we considers only parameter calculati


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NO


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on and pump selection


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knowns

flow: Q 75 m3/hr Inlet Area:

total head: H 15 m Outlet Area

suction head : Hs 15.49 Static suction heigh

discharge head: Hd 16.42 Atmospheric height

NPSHa 13.46 static discharge hei

Total Dynamichead: H 31.91 Gauge Inlet pressurGauge Outlet press

Fluid properties

fluid water

viscosity 0

temperature 60

Density: 0

inlet velocity 1.18 m/s

outlet velocity 0.66 m/s

vapour pressure 2.03 m

Friction factor: 0.02Roughness coefficnt: 0

Pipe data

Inlet pipe dia 0.15 m

outlet pipe dia 0.2 m

Inlet pipe length 13 m

Outlet pipe length 12 m

impeller exit radius

impeller eye radius

impeller exit width

speed (RPM )

Loses:

Inlet friction head loss 0.09 =

Outlet friction head loss 0.06

m2/s0C

Kg/ m3


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0.07

0.13

5 m

10.33 m

ht 6 m

height 0 mre height 0 m

m2

m2


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a. inlet velocity=

b. Outlet velocity

A.Suction head= Inlet friction head + Inlet equipment head + inlet velocity head + Sta

1. Inlet friction head = (frictional factor* inlet pipe length * (inlet velocity)2) / ( inlet dia* 2*

2. Inlet equipment head = K * (inlet velocity)2 / 2*g

3. Inlet velocity head = (inlet velocity)2 / 2*g

4. Static inlet elevation = Elevation of inlet tank from pump (pump is considered at groun

5. Inlet gauge pressure head = Reading of pressure gauge connected at inlet ( converted i

6. Atmospheric pressure head: Atmospheric pressure of enviornment ( converted interms

B. Discharge head = Outlet friction head + Outlet equipment head + Outlet velocity h

7. Outlet friction head = (frictional factor* outlet pipe length * (outlet velocity)2) / ( outlet

8. Outlet equipment head = K * (Outlet velocity)2 / 2*g ( K= equivalent length for the conn

9. Outlet velocity head = (Outlet velocity)2 / 2*g

10. Static Outlet elevation = Elevation of outlet tank from pump (pump is considered at g

11. Outlet gauge pressure head = Reading of pressure gauge connected at Outlet ( conve

12. Atmospheric pressure head: Atmospheric pressure of enviornment ( converted interms

C. Total Head : Suction head + Discharge head

D. NPSHa: Suction Head Vapour pressure head

(4* flow rate)/( 3600*3.14*(inlet dia)2)

(4* flow rate)/( 3600*3.14*(outlet dia)2)


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ic inlet elevation + Inlet Gauge pressure head + atmospheric pressure head

g )

surface )

nterms of height)

f height)

ead + Static Outlet elevation + outlet Gauge pressure head + atmospheric pressure head

ia* 2* g )

ected equipment )

ound surface )

ted interms of height)

of height)


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Eq 1

Eq 2

Eq 3

Eq 4

Eq 5

This page


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Pv = 0.00133 * (10 x)

is copied from the equations for vapour pressure calculation for the VALVE SPEQ

x = A + (B / TempK) + C * Log(TempK) / Log(10) + D * (TempK / 1000) + (E * TempK2) /

Gf = 1 / (a1 * Pvbar + (b1 / Pvbar) + (c1 * Pvbar2) + (d1 * Log(Pvbar)) + (e1 * Pvbar 2) + f1

Gf = h1 * Log(Pvbar) + i1 * Pvbar 2 + j1 * Pvbar + k1

Viscosity = a2 + b2 * TemperatureR + c2 * TemperatureR 2 + d2 * TemperatureR 3


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Pv - Vapor Pressure

Gf - Liquid Specific Gravity

000000


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Documents

Pump Rules New