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Total head, N.P.S.H. and other calculations…19

Calculation results (method 1 – pressure at the control valve inlet)

The sign in the second column follows the signs of the terms in equation [16].

Component Sign (ft fluid) Results

Total head + ∆H P 97.34

Pipe friction head loss - ∆H FP1-7 16.2

Fittings friction head loss - ∆H FF1-7 10.5

Equipment friction head loss - ∆H EQ1-7 18.85

Check valve head loss - ∆H CHECK 1.65

Total static head + z 1 – z 7 - 43

Velocity head difference + v 2 1/2g – v 2 7 /2g - 1.62

Tank pressure head + H 1 0

Pressure head at the control valve (ft fluid) = H 7 5.52

Pressure at the control valve (psig) = p 7 2.34

Table 16 Summary of the results of the pressure calculation at point 7.

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