Flowserve SVCN 7, Установка, эксплуатация и обслуживание

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SVCN 7 INSTALLATION, OPERATION, & MAINTENANCE
The Flowserve standard for suction strainers consists of a conical shaped steel plate. The plate has
1/16” perforations and is of sufficient size and thickness for the required flow. The open area of the
strainer should have a minimum of a 3 to 1 ratio to the area of the pump suction (see Figure 2-1
Typical Suction Strainer below).
Preferred Direction
of Flow
Cone Type Strainer
Figure 2-1 Typical Suction Strainer
Pressure gauges should be installed on both sides of the screen so that the pressure drop across the
screen can be measured.
When the unit is being started, the gauges on each side of the screen should be carefully watched. An
increase in the differential pressure between the two gauges indicates that the screen is becoming
clogged with dirt and scale. At this point, the pump should be shut down, and the screen cleaned
and/or replaced.
2.1.2.2 Bypass Line
Operation at low flows results in pump horsepower heating the liquid. A bypass may be required to
prevent vaporization and subsequent pump damage. Refer to your local Flowserve office to determine
if a bypass is required. Mechanical damage may result from continuous operation at flows less than
specified.
2.1.3 FOUNDATION
The foundation should be sufficiently rigid and substantial to prevent any pump vibration and to
permanently support the baseplate at all points. The most satisfactory foundations are made of
reinforced concrete. These should be poured well in advance of the installation to allow sufficient
time for drying and curing. A rough finish top surface is best when applying grout.
The General Arrangement Drawing (In the back of this manual) will furnish anchor bolt locations,
size of bolts, etc. See Figure 2-2 below.
Figure 2-3 below illustrates the recommended foundation bolt arrangement. Notice the large washer
with lugs at the bottom. It should be welded to the bolt and pipe sleeve to prevent turning.
Allow a little more than the specified threaded bolt length above the rail of the baseplate. The excess
can always be cut off if it is not needed.
DO2604-13 - 2-2 -