Flowserve MP1 Sier-Bath - Manual (Page 18)

MP1 USER INSTRUCTIONS ENGLISH 26999958 – 10-12
Page 18 of 48 flowserve.com
parts of clean building sand with sufficient water to
provide the proper consistency. The grout should flow
freely but not be so wet as to cause the sand and
cement to separate.
Thoroughly puddle the grout while pouring to eliminate
air pockets and low spots. Pour sufficient grouting to
ensure that the bottom surface of the baseplate is
completely submerged. Do not fill isolated areas
around the shims or levelling nuts. Once the grout has
set sufficiently, remove the wooden forms and finish off
the sides and top as desired. At the same time,
roughen the grout surface inside the baseplate. Cover
with wet burlap and allow the grout to cure for at least
40 hours.
After grouting has cured, shims and levelling nuts
should be removed or backed off. Tighten down
baseplate to the new grout to put bolts in tension and
ensure rigidity of structure. Install jam nuts and cut the
bolts to the desired length. Finish grouting isolated
areas. Fill the baseplate including pump and driver
support pedestals with concrete. Trowel and slope the
surface to give suitable drainage.
After the concrete has cured, and while the pump and
driver are uncoupled, the driver rotation should be
checked. Be sure that the driver is locked out after this
check. Note that the required pump shaft rotation is
marked on the front head of the pump (see section
5.3 Direction of rotation)
4.7 Piping
Protective covers are fitted to the pipe
connections to prevent foreign bodies entering during
transportation and installation. Ensure that these
covers are removed from the pump before connecting
any pipes.
4.7.1 Suction and discharge pipework
In order to minimize friction losses and hydraulic noise
in the pipework it is good practice to choose pipework
that is one or two sizes larger than the pump suction
and discharge. Typically main pipework velocities
should not exceed 2 m/s (6 ft/sec) suction and 3 m/s (9
ft/sec) on the discharge.
Take into account the available NPSH which must be
higher than the required NPSH of the pump.
Never use the pump as a support for
piping.
Excessive pipe loads and/or soft feet
will cause serious damage to the pump. Verify both
before pump is started.
Maximum forces and moments allowed on the pump
flanges vary with the pump size and type. To minimize
these forces and moments that may, if excessive,
cause misalignment, hot bearings, worn couplings,
vibration and the possible failure of the pump casing,
the following points should be strictly followed:
 Prevent excessive external pipe load
 Never draw piping into place by applying force to
pump flange connections
 Do not mount expansion joints so that their force,
due to internal pressure, acts on the pump flange
Information regarding maximum allowable forces and
moments on the suction and discharge flanges is
provided on the General Arrangement drawing.
Suction and discharge piping and associated
equipment should be supported and anchored near to
but independent of the pump. If an expansion joint or
non-rigid coupling must be used, a pipe anchor must
be installed between it and the pump to ensure that
any flange loads do not exceed the specified limits.
If operational difficulties are encountered, suction and
discharge pressure readings must be determined to
establish the cause of the problem. In anticipation of
such problems, pressure taps, located in a straight
section of pipe between the pump and first fitting
should be provided on the suction and discharge lines.
Ensure piping and fittings are flushed
before use.
Ensure piping for hazardous liquids is arranged
to allow pump flushing before removal of the pump.
4.7.2 Suction piping
a) The suction piping should be as short and as
direct as possible.
b) The inlet pipe should be one or two sizes larger
than the pump inlet bore and pipe bends should be
as large a radius as possible.
c) Pipework reducers should have a maximum total
angle of divergence of 15 degrees.
d) On suction lift the piping should be inclined up
towards the pump inlet with eccentric reducers
incorporated to prevent air locks.
e) On positive suction, the inlet piping must have a
constant fall towards the pump.
f) Flow should enter the pump suction with uniform
flow, to minimize noise and wear. This is