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Section II - Installation
Mounting
Pump foot should be securely fastened to a solid foundation. If
the pump was received with plastic shipping shims, these shims
may be used as additional support for the motor feet (though not
required).
Piping
CAUTION:
The NPSH available to the pump must be greater than the NPSH required. Filters, strainers and any other fittings in the
suction line will lower the NPSH available and should be calculated into the application.
• Install the pump as close to the suction source as possible.
• Support the piping independently near the pump to eliminate any strain on the pump casing. Also, the piping should be aligned to
avoid placing stress on the pump casing.
• The suction side of the pump should be as straight and short as possible to minimize pipe friction.
• Keep bends and valves at least ten pipe diameters away from the suction and discharge.
• The suction line should be at least as large as the suction inlet port or one pipe size larger so that it does not affect the NPSHa. Do
not reduce the suction line size.
• The suction line should not have any high spots. This can create air pockets. The suction piping should be level or slope slightly
upward to the pump.
• A check valve and control valve (if used) should be installed on the discharge line. The control valve is used for regulating flow.
An isolation valves on the suction and discharge are used to make the pump accessible for maintenance. The check valve helps
prevent the pump against damage from water hammer. This is particularly important when the static discharge head is high.
• If flexible hose is preferred, use a reinforced hose rated for the proper temperature, pressure and chemical resistance against the
fluid being pumped.
• The suction valve must be completely open to avoid restricting the suction flow.
• FTI advises installing a flush system in the piping to allow the pump to be flushed before it is removed from service.
NOTE: The pump is provided with a provision for a customer installed ¼” drain in the impeller housing. See the Drain Installation Section
for details.
• For units in a suction lift system, install appropriate piping in the discharge to allow priming of the pump (MSDB models are not self-
priming).
• When installing pumps with flanges, we recommend use of low seating stress gaskets such as Gore-Tex® or Gylon® (expanded
PTFE).
Motor/Electrical
Only qualified personnel trained in the safe installation and operation of this equipment should install the motor. Install the motor
according to National Electric Code, NEMA MG-2, IEC standards requirements and/or applicable local electrical codes. The voltage and
frequency variations of the power supply should never exceed the limits established in the applicable standard. Prior to connecting
to the power line, check nameplate voltage, rotation connection and ensure proper grounding. Sufficient ventilation area should be
provided to insure proper operation and cooling of the motor. The motor must be installed with a suitable overload protection circuit.
For three phase motors it is recommended to install a phase failure protection device. Download the motor manual from the specific
motor manufactures’ website for additional information concerning motor installation, safety and maintenance instructions.
Wire the motor for clockwise rotation when facing the fan end of the motor.
