Barmesa Pumps IB Series, Installation, Operation & Maintenance Manual

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5
Figure 2 Wrong installation.
Without
strainer
Vortex
"D"
Too much
height
Less than
4 "D"
Long piping
Concentric
reducer
Air
pocket
Air leaks
A valve in the suction pipe
is not recommended
Piping elbow immediately
installed after the suction
Installation
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.
Use pipe or hose reinforced
sufficiently robust to prevent
destruction due to high pressure.
4
Discharge pipe
Due to the cost of energy or BHP
necessary to overcome the friction
generated by using a smaller
diameter pipe, a larger diameter
discharge pipe is commonly used
than the required by the volute or
body.
Figure 3 Inclination.
Correct
0.39" of inclination
per 3.28 ft
Incorrect
Air pocket
Figure 4 Positive suction.
Check valve
(completely open)
"D"
6 "D" min.
Pressurized water
Correct
Figure 5 Positive suction.
A retention valve in the suction pipe
is not recommended. If required,
better install the valve in the
discharge pipe.
Valve partially
closed
Incorrect
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