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rrnq ' :::::::: I ]HHr Special Applications
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o Calculate stock head-capacities by multiplying water
performances by the correction factors. Calculate stock
efficiencies using equivalent water BHP values.
GPM(stock ) x Total Head(stock) x SP. Gr.
%Eff.(stock ) =
3960 x BHP(stock)
NOTE: BHP (Stock) = BHP (Water)
Plot the curve for water and the approximate stock performance
o
as in Figure 8.15.
l:T.~.:... 7 :.: :I: i:: 2::~: ' . : ::.: :~:I: :.:i:i: i: :::::":::; I: : ......... : .... .APPROXIMATE :
::.I"::?::HEAD:I6V8 '~: DIA: , ..::.:..~{....:::: ..: : I: ! .i i .l::i : " ::::::::I: _.i:: : C;HARACTERISTIC CURVES :
t30 84
0 2.00. 400 600 800 1000 1200 -: 1400
GALLONS PER MINUTE
Figure 8.15: Approximate characteristic curves of centrifugal pump (Reproduced with
permission of Goulds Pumps, ITT Industries)
......... 141
