calc_example

Total head, N.P.S.H. and other calculations…18
Pressure head loss due to equipment
p(
psi)
H ( ft fluid)
= 2.31
SG
SECTION FLOW
(USgal/min)
TYPE QTY ∆p
(psi)
SG ∆p
(ft fluid)
∆H EQ
(ft fluid)
L 2 500 Filter 1 3 0.98 7.07 7.07
L 3 500 Heat 1 5 0.98 11.78 11.78
exchanger
Total
- - - - - - 18.85
∆H EQ1-7
Table 14
Pressure head loss due to the check valve
⎛
⎞
⎜
⎟
⎜ q ( gpm ) ⎟
∆ p ( psi ) = ⎜
⎟ ×
⎜ ⎛ gpm ⎞
CV ⎜ ⎟ ⎟
⎜
1 / 2
psi
⎟
⎝ ⎝ ⎠ ⎠
2
SG
TYPE FLOW
(USgal/min)
QTY DIA
(in)
CV(gpm/psi 1/2 ) SG ∆p
(psi)
∆H check
(ft fluid)
Tilting disc 500 1 6 590 0.98 0.7 1.65
Table 15
Static head
z 1 z 7 z 1 – z 7 (ft fluid)
2803 2846 - 43
Velocity head difference between points 1 and 7
v 1 v 7 v 2 1 /2g v 2 7/2g v 2 1/2g – v 2 7 /2g (ft fluid)
0 10.21 0 1.62 - 1.62
Tank pressure head at the inlet of the system
H 1 (ft fluid)
0