Barmesa Pumps 62070048 Handbuch für Installation, Betrieb und Wartung - Seite 6
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Figure 2
Wrong installation.
Concentric
reducer
barmesa.com
Suction height - suction pipe should
have a slope of 0.39" per 3.3 ft of
suction. Never exceed 16.4 ft suction,
considering friction. (Figure 3)
Positive/Drowned Suction - A gate
valve is installed in the suction pipe
to service the pump (Figure 4). Volute
or body have plugs, and these must
be removed to allow trapped air to
escape.
Figure 5
Positive suction.
Incorrect
A retention valve in the suction pipe
is not recommended. If required,
better install the valve in the
discharge pipe.
Air
Air leaks
pocket
Piping elbow immediately
installed after the suction
Figure 3
Inclination.
Figure 4
Positive suction.
Correct
A valve in the suction pipe
is not recommended
Long piping
Vortex
Without
strainer
Correct
0.39" of inclination
per 3.28 ft
(completely open)
Valve partially
closed
Installation
Too much
height
"D"
Less than
4 "D"
Incorrect
Air pocket
Pressurized water
Check valve
"D"
6 "D" min.
4Discharge pipe
Use
pipe
or
hose
sufficiently
robust
destruction due to high pressure.
Due to the cost of energy or BHP
necessary to overcome the friction
generated
by
using
diameter pipe, a larger diameter
discharge pipe is commonly used
than the required by the volute or
body.
reinforced
to
prevent
a
smaller
5