Micropump GN Series Installation, Operation and Warranty Information - Manual (Page 13)

13
DOC No: 7046 REV G
Restrictions in the inlet and discharge lines may cause a loss of pump
performance. A restriction can be a valve, small bore tubing, long lengths of
tubing or sharp turns/elbows in the line. Design piping runs to minimize these
restrictions wherever possible.
High system pressure may be experienced if the pump outlet is blocked,
e.g. by a closed valve downstream. Ensure that a pressure relief valve
is fitted to the system if the pump is capable of exceeding maximum
system pressure.
Piping
Piping must not exceed flash point temperature of the area.
Refer to the guidelines for piping given in the “Hydraulic Institute Standards” for
questions relating to system piping. The following should be observed when piping the
system:
• Pipes connected to the pump should be level or slope down towards the pump.
• Ensure that no part of the pipe extends below the level of the pump inlet port.
• Piping that handles hot liquid requires installation of expansion loops or joints to
prevent misalignment from linear expansion.
• Never size inlet piping diameter smaller that the pump inlet port.
• Separate inlet lines are recommended when more that one pump is operating from
the same medium source.
Ensure all piping is clean and flushed out prior to connection to the
pump.
Misaligned piping may apply a load to the pump head pulling it out of
alignment with the motor. Do not force piping into position. Pump/motor
misalignment may result in magnet hub rub on the magnet cup causing
high surface temperatures or weakening the pressure boundary created
by the magnet cup.
NOTE
CAUTION
Secure the pump/motor to the installation using suitable fixing bolts. Connect the inlet
and discharge pipe work to the pump. Do not force piping into position.
Loose bolts may result in pump/motor misalignment. Tighten bolts
appropriately. Pump/motor misalignment may result in magnet hub rub
on the magnet cup causing high surface temperatures or weakening the
pressure boundary created by the magnet cup.
Mounting