Pump Soft Ware

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APPLETS OR INSTANT WEB SOFTWARE

This page contains many applets that can help you do calculations and diagnose problems with your centrifugalpumps to SAVE YOU TIME. All these applets have integrated help menus,see DISCLAIMER at bottom of

page.

To run these applets you need to install on your computer theJava 2 Runtime

Environment SE 1.4available from Sun Microsystems and allow the Java Plug-in to be

installed. You should also have Internet Explorer version 6 installed and you may have

to disable any pop-up blocker software. If you only see a grey box, the applet is not

running, it is possible that you do not have the right java software. Some companies

will not allow pure java software to run on their computers which will stop these

applets from loading.

1. Calculate N.P.S.H.A.

Thisapplet will help you

calculate the N.P.S.H.A. (Net

Positive Suction Head Available)

to your pump. You can then checkthe pump performance curve to

see if it is sufficient for your

pump to operate properly. There

are two ways to do this

calculation, one involves knowing

the tank level and the friction

loss in the suction piping and the

other requires a pressure

measurement at the pump inlet.

View this applet's Help file.

ENJOY! Click on the image to

start.

Want to hear the sound of

cavitation.....!

This image and others below in the same style come from a wonderful book called Slurry Pump

Basic published bySvedala,a major pump manufacturer

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2. Predict Cavitation

Thisapplet is based onexperimental trials done by Dr.

D. Thoma that were designed to

investigate the conditions that

produce cavitation. Cavitation

depends on the specific speed

and the suction specific speed,

these in turn depend on the flow,

the head and the rpm of the

pump. All the calculations are

done for you. Is your pump

cavitating? Thisappletwill helpyou determine this. ENJOY! Click

on the image to start.

View this applet's Help file.

3. Predict centrifugal pump

efficiency

This neatapplet helps you

do power calculations prior to

the selection of the pump from a

manufacturer's catalog. Save

time in the initial phase of the

project and calculate power

requirement prior to the final

pump selection. Alternatively,

compare the efficiency of the

final pump selection with the

industry average.

View this applet's Help file.

4. Calculate head from

pressure and flow from velocity

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Thisapplet will convert your

pressure readings at the pump

discharge and suction to

pressure head. Use these values

to check against the pump

performance curve to see if you

are obtaining the predicted

performance.

It also helps you convert flow

rate to velocity, simple but

effective.

View this applet's Help file.

5. Calculate the mass flow rate

of solids suspended in a liquid

If you transport solids in a liquid

via a pumping system you need to

know how many tons per hour of

solids are being displaced.Thisapplet will help you

calculate this based on the

volumetric flow rate and other

factors.

View this applet's Help file.

6. Affinity laws - Calculate a

new impeller diameter or speed

for a new flow rate

The affinity laws can be used to

calculate a new impeller diameter

for a new flow requirement. If

you are contemplating a

permanent flow reduction,

reducing the impeller diameter

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will allow your pump to run

smoothly and more efficiently.

Thisapplet will help you do

these calculations.

Alternatively calculate what

speed is required while keeping

the diameter constant for a new

flow requirement.

In short the affinity laws are

great, use them!

View this applet's Help file.

7.1 Calculate total head of acentrifugal pump with pressure

measurements

It's a long process to calculate

the total head of a pump and you

need allot of information.

Fortunately it is quite easy to

measure the pressure at the

pump outlet and inlet and then

calculate the total head.

Thisapplet helps you do thiscalculation.

7.2 Calculate the pump power

with motor current

Motor amps are easy to obtain as

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most installations have ammeters

installed on the motor control

panel. You can calculate the

power consumed by the pump

with the amperage reading of

the motor and thereforedetermine the mechanical status

of the pump. You can use

thisappletand the data provided

to help you with this calculation.

View this applet's Help file.

8. Pipe friction loss for pulp

suspensions

Thisapplet will be useful

for people who work in the pulp

and paper industry. Pulp

suspensions are a special class of

non newtonian fluids. Depending

on the consistency, the friction

factor can be much greater than

that of water.

Theapplet will help you

calculate the friction factor

(feet/100 feet of pipe) for each

type of pulp suspension. It will

also rank them in order of high

to low friction. This method can

only be used for pulp consistency

higher than 2% and less than 6%.

Two percent consistency pulp is

considered to have the same

friction factor as water.

View this applet's Help file.

9. Viscosity correction factors

for centrifugal pump water

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impeller tip speed can become an

issue in terms of excessive

erosion due to abrasive particles.

This is especially prevalent in the

mining industry where very heavy

concentrated abrasive slurriesare handled on a regular basis.

The Hydraulic Institute has

issued guidelines on maximum tip

speed to avoid excessive erosion.

These guidelines are clearly

shown in the applet.

View this applet's Help file.

12. Calculate the pressure

anywhere within a pump system

Often one needs to know the

pressure at a specific location in

a pump system, thisapplet is

designed to help you do this. It

may be at the inlet of a control

valve, or maybe at the high pointof the system. One critical

location is the pump inlet, this

will allow you to calculate the

N.P.S.H.A. of the system.

View this applet's Help file.

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13. Pipe friction head loss

Thisapplet will tell you howmuch friction loss the fluid will

produce at a certain flow rate

for a given pipe size, pipe

roughness and flow rate

(Newtonian fluids only).

View this applet's Help file.

14. Maximum allowable piping

pressure

Thisapplet will help you

calculate the maximum allowable

pressure in pipe according to the

ASME pressure piping code

B31.3.

View this applet's Help file.

15. Pipe fittings friction loss

Thisapplet will help you

calculate pipe fittings frictionloss according to Crane Valve Co.

Technical Paper no.410.

View this applet's Help file.

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16. Pipe size economic analysis

Thisapplet will help you

decide the pipe diameter based

on a comparison of pump power

costs and pipe installation costs.

Size pipes properly now, once

they are installed it's too late.

View this applet's Help file.

Disclaimer: We are confident that these programs work as intended, however, we cannot be held responsible

for any negative consequences of their use. You may check the results at all times, a practice I encourage since

the answers can be easily calculated with the formulas provided either directly on the program display or in

the Help menu.

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