SP | Location | Connections | Rotation | Piping
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3. Suction piping should be the same size as the
pump inlet.
4. Any reducer should be of the eccentric type. If
a reducer is used in the horizontal run of
suction piping, it must be used with the flat
part of reducer on the top to avoid air pockets.
5. A horizontal portion of the suction line must
have a gradual rise to the pump from the
source of the liquid being pumped. Any high
point in the suction line will create an air
pocket, and will prevent proper pump
operation and inhibit priming capability.
6. An installation requiring long pipe lines
handling hot or chilled liquids, requires
provisions for relieving the expansion and
contraction of the pipe to eliminate any pipe
stress from acting on the pump casing.
7. It is recommended to use long radius elbows
and eccentric reducers whenever possible.
These types of fittings reduce friction loss.
Tapered reducers should only be used in
vertical suction piping.
8. If a suction strainer is used, it should have
mesh size equal to or less than the solid
handling capability of the pump, and open
mesh area equivalent to a minimum of eight
times the area of the suction pipe size.
9. Before tightening the suction pipe connection
flange, align it exactly with the pump suction
flange. Do not pull a pipe into place by
tightening the flange bolts and/or couplings.
All pipe lines near the pump must be rigidly
supported to avoid strain on the pump, which
may cause excessive vibration, decreased
bearing life and/or increased shaft deflection
and seal wear.
10. If a single suction line is installed into a sump,
it should be installed away from the sump wall
at a minimum distance equal to 11/12 times
the diameter of the suction line. If more than
one suction line is installed in the same sump,
separate the suction lines from each other by a
minimum distance equal to three times the
diameter of the largest suction line.
SAM Engineering (Pty) Ltd SELF-PRIMING
SOLIDS HANDLING PUMPS MOTOR DRIVEN:
LONG COUPLED TYPE: El/EB "SP"
GENERAL
LOCATION
By placing your SAM pump on a firm, level
foundation, you reduce harmful vibrations and
unnecessary noise. Your SAM pump is self-priming
and may be located above the source of liquid
supply. Best pump operation is obtained by
locating the pump as close as possible to the
liquid being handled. Keep in mind a pump can
push liquid more effectively than it can pull or
draw liquid. The actual priming ability of a pump
depends upon many factors such as the size and
layout of the piping, the type of liquid and its
temperature, the specific pump selected and its
speed of operation. Additional priming information
is given in the SAM Engineering Sales Catalogue.
Provide the necessary space around the pump for
future inspection and servicing of the unit.
CONNECTIONS
Connections at the easily accessible suction and
discharge ports can be made either with hose or
pipe. The use of strongly reinforced suction hose
will prevent collapsing of the hose during opera-
tion. New hose washers should be used at the
couplings to prevent trouble causing leaks. All hose
or pipe should be independently, supported to
eliminate excessive strain on the pump.
ROTATION
Your pump is specifically designed to rotate in a
counter clockwise direction when viewing the
motor from the pump end.
PIPING
1. Suction piping should be as short as possible
using the fewest number of elbows and fittings
possible to reduce friction loss and avoid
priming problems.
2. The designer of the piping system must be
sure that the available NPSH of the system
exceeds the required NPSH of the pump.
(Refer to pump performance curve for the
value of the NPSH required by the pump at the
operating point).
