SPP Pumps Split Case Pumps - Manual (Page 9)

Pump Installation Guide
Manual No/Rev
W00-002E / 4
Our policy is one of continuous improvement and we reserve the right to alter specifications without giving notice.
Page 9 of 12
beyond the piping supports closest to the
pump.
INCREASER CHECK
VALVE
DISCHARGE
VALVE
DISCHARGE
PIPE
PUMP FOUNDATION PLINTH
Install piping as straight as possible,
avoiding unnecessary bends. Where
necessary, use 45Ε
Ε Ε Ε or long sweep 90Ε Ε Ε Ε
fitting to decrease friction losses.
Where reducers are used, eccentric or 'flat
top' reducers are to be fitted in suction lines
and concentric or straight taper reducers in
discharge lines. Undulations in the pipe
runs are also to be avoided. Failure to
comply with this may cause the formation of
air pockets in the pipework and thus
prevent the correct operation of the pump.
Make sure that all piping joints are air tight.
FLAT TOP REDUCER
WILL NOT TRAP AIR IN
THE SUCTION PIPE
CONCENTRIC REDUCER
WILL TRAP AIR IN THE
SUCTION PIPE
The use of butterfly valves in suction lines is
not recommended, however if unavoidable
there should be a distance of at least 5 pipe
diameters between the valve and the pump
inlet flange.
The suction pipe should be as short and
direct as possible, and should be flushed
clean before connecting to the pump.
Where suction lift is not very high, it is
advisable to use a foot valve. Horizontal
suction lines must have a gradual rise to the
pump. If the pumped fluid is likely to
contain foreign matter then a filter or coarse
strainer should be fitted to prevent ingress
to the pump.
The discharge pipe is usually preceded by a
non-return valve or check valve and a
discharge gate valve. The check valve is to
protect the pump from excessive back
pressure and reverse rotation of the unit
and to prevent back flow into the pump in
case of stoppage or failure of the driver.
The discharge valve is used in priming,
starting and when shutting down the pump.
Refer to the operating manual for the pump
for instructions on the use of the control
valves
Shaft alignment must be
checked again after the
final positioning of the pump unit and
connection to pipework as this may have
disturbed the pump or motor mounting
positions. To restore alignment shims
between the pump or motor feet and the
baseplate should be varied to suit.
Pipework Connected and
Alignment Confirmed. Signed Date
Lateral TIR. ………….. Angular TIR. ………….
4 Connection to Services
The requirements for each installation will
vary depending upon the equipment
supplied.
Ensure that site electrical power supply
characteristics match the data on the
equipment data plates.
If the control panels were manufactured or
supplied by Sterling, wiring diagrams will be
included with the instruction manual. If the
panels have been supplied by others, refer
to their literature for electrical details and
wiring instructions.
4.1 Electrical Supply Connection
ATTENTION