4
If lifting of the entire pump is required, do so with
slings placed under the base rails as shown in
Figure 3.
The best pump location for sound and vibration
absorption is on a concrete floor with subsoil
underneath. If the pump location is overhead,
special precautions should be undertaken to
reduce possible sound transmission. Consult a
sound specialist.
If the pump is not on a closed system, it should be
placed as near as possible to the source of the
liquid supply and located to permit installation with
the fewest number of bends or elbows in the
suction pipe.
Figure 3: Lifting the Pump
The installation must be evaluated to determine
that the Net Positive Suction Head Available
(NPSHA) meets or exceeds the Net Positive
Suction Head Required (NPSHR), as stated by the
pump performance curve. See the section entitled
Suction and Discharge Piping for more details
regarding proper suction piping installation.
IMPORTANT:
Do not install and operate pumps,
3D valves, suction diffusers, etc., in closed
systems unless the system is constructed with
properly sized safety devices and control devices.
Such devices include the use of properly sized
and located pressure relief valves, compression
tanks, pressure controls, temperature controls,
and flow controls as appropriate. If the system
does not include these devices, consult the
responsible engineer or architect before making
pumps operational.
