c)If high points cannot be avoided in suction line, provide them with air relief cocks.
d)If a strainer is necessary, its net area should be three or four times the area of the suction pipe.
e)If an inlet valve is necessary, choose a model with direct crossing.
Do not tighten flanges before the final check (see § 4.5.4).
4.5.2.2 Design of a suction lift line
The inlet pipe must be as short and as direct as possible, never place an elbow directly on the pump inlet nozzle.
D
I
Sufficient immersion
I 3 x D
Sump suction configuration
a)Avoid sharp elbows or sudden narrowing. Use convergent 20° (total angle) with upright generating.
b)Arrange that the suction piping is inclined upwards towards the pump ensuring that there are no peaks.
c)If a foot valve is necessary, do not oversize it because it would generate pulsations (valve beating).
Do not tighten flanges before the final check (see § 4.5.4).
4.5.3 Discharge piping
4.5.3.1 Design of a discharge line
a)If discharge line is provided with a divergent, its total angle will be between 7° and 12°.
b)Install the discharge valve after the
The
If necessary, a control manometer (pressure gauge) can be connected on the piping.
Control manometer
Do not tighten flanges before the final check (see § 4.5.4).
4.5.4 Final checks
a)Check the tightening of anchor bolts. Tighten them if necessary.
b)Check that protective covers on suction and discharge flanges are removed.
c)Check that holes of piping flanges are parallel and correspond to those of the pump.
d)Tighten suction and discharge flanges.
4.6 Electrical connections
Electrical connections must be made by a qualified Electrician in accordance with relevant local national and international regulations. This includes any grounding.
It is important to be aware of the EUROPEAN DIRECTIVE on potentially explosive areas where compliance with
Avoid mechanical, hydraulic or electrical overload by using motor overload trips or a power monitor and make routine vibration monitoring.
It is important to be aware of the EUROPEAN DIRECTIVE on electromagnetic compatibility when wiring up and installing equipment on site. Attention must be paid to ensure that the techniques used during wiring/installation do not increase electromagnetic emissions or decrease the electromagnetic immunity of the equipment, wiring or any connected devices. If in doubt, contact Flowserve for advice.
The motor must be wired up in accordance with the motor manufacturer's instructions (normally supplied within the terminal box) including any temperature, earth leakage, current and other protective devices as appropriate.
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