Bristan ST PUMP 15TN, Инструкция по установке, эксплуатации и обслуживанию

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9
5.2 Non-Preferred Pump Location
If it is necessary to position the Pump above the secondary tapping on the hot
cylinder it is fed by, the risk of introducing air will be increased.
To avoid this risk one of the two following solutions must be adopted:
a. The use of a Top Entry cylinder flange.
b. The use of a Stuart Side Entry cylinder flange, which should have the
addition of an inverted loop (“U” bend) of 350 mm minimum drop
before rising to the pump, located as close as possible to the
cylinder wall. This will ensure the pump receives an air free supply
and the cylinder vents any air up the vent pipe and not the pump
feed (Figure 2 and Figure 3).
Figure 4
Single Pump
20
0mm
m
in
Lea
st
p
ref
er
red
ar
ea
35
0m
m
m
in
M
ax
s
ta
tic
in
le
t p
re
ss
ur
e 1
3m
M
in
s
ta
tic
in
le
t p
re
ss
ur
e 0
.5
m