
198 Appendix A
9.2 Suction head / closed tank
Water temperature – 130 °C, Density @ 130 °C – 934.6 kg/m
3
,
Vapour pr @ 130 °C =
270.13 kPa (absolute), Gauge pr = 130 kPa
g
, Gravitational acceleration = g = 9.81 m/s
2
,
Suction head (H
s
) = 4.0 m, Pipe friction loss = 1.1 m, Valve friction loss = 0.1 m
st vap
NPSH-a= HH−
Closed
tank
WL
Valve friction loss
(0.1 m)
H
s’
=4m
Pipe friction loss (1.1m)
130
KPa
9.3 Suction head / closed tank – given
Water temperature = 108 °C, Density @ 108 °C – 952.2 kg/m
3
,
Vapor pr @ 108 °C =
133.90 kPa (absolute), Gauge pr = 110 kPa
g
, Gravitational acceleration = g = 9.81 m/s
2
,
Suction head (H
s
) = 4.0 m, Pipe friction loss = 1.1 ...