Acromet ACRO-SMART AS.1, Manual

Page: 8 / 45

Acro-Smart Electronic Series January 2017
Acro-Smart Electronic Series
Pa
ge
4
4.1.4 Piping should be as short and straight as possible and arranged to
avoid loops or pockets where gas may accumulate.
4.1.5 All piping should be separately supported close to the pump to avoid
imposing pipe loads on the pump. When handling high or low
temperature liquids, measures should be taken to prevent distortion
of piping imposing loads on the pump.
4.1.6 All pipe work should be flushed clean of any solids which may be
present in the pipe work (i.e. weld slag, dirt following construction or
repair) before final connection to the pump and start-up.
4.1.7 Make provision in discharge piping where necessary to facilitate initial
priming of pumps against reduced pressure.
4.1.8 Capacity adjustment range for accuracy of metering, avoid over
sizing of metering pumps. Flow rates of less than 10% of pump
maximum capacity may produce unacceptable accuracy.
4.1.9 Where lengthy suction and discharge pipelines are involved or there
is limitation on size, install pulsation dampeners close to the pump
to:

Avoid cavitation – maintain metering accuracy.

Reduce amplitude of pulsations
4.1.10 Ensure that the drain line from any pressure relief valve in the
system is:

Suitably sized to ensure correct operation of the relief valve.

Returns to the suction tank.

Is fitted with a sight glass for visual indication.
4.2 Suction
4.2.1 Piping must be air tight.
4.2.2
For ease of maintenance an isolating valve should be located near the
pump inlet.
4.2.3 Solids should be prevented from entering low volume pumps or
pumps used for high accuracy metering. A strainer of 150-200 mesh
is recommended and should be adequately sized to prevent
restriction of flow.
4.2.4 Suction pipe entrance should be at least 75 mm above the bottom of
solution tank to allow settlement of larger solids in the tank.
4.2.5 Make provision in suction piping where necessary to facilitate
automatic venting of any gases likely to accumulate.