Fasteners; Pipes; Pipe Sizing; Laying Pipes - Speck Normblock Multi Serie Traducción De Las Instrucciones Para El Manejo Originales

Installation
5.1.6

Fasteners

Fasten pump using screws.

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5.2

Pipes

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5.2.1

Pipe sizing

Suction lines which are too long have significant disadvantages:
• Higher resistance which results in reduced suction
performance and a higher risk of cavitation.
A minimum length of double the inner diameter of the suction
flange must be planned for the calming section in front of the
suction flange.
For longer pipes, losses due to pipe friction must be taken into
account.
 The nominal diameter of the pipe must be planned according
to the pump connections.
 Do not exceed maximum flow speeds.
– Suction line: 1.5 m/s
– Pressure line: 2.5 m/s
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5.2.2

Laying pipes

Keep the suction and pressure lines as short and straight as

possible.
 Avoid sudden changes to the cross-section and direction.
 Lay the suction line below the water level.
 Lay the suction line as follows to prevent air pockets from
forming:
– For intake mode: continuously falling.
– For suction operation mode: continuously rising.
 If clogging is possible, for example with straw or grass, install
a filter in the intake or the suction line.
 Depending on the type of pump and system, install a non-
return valve as necessary.
 Install a shut-off valve in both the suction and pressure lines.
Avoid valves which close suddenly. Install a shock absorber

or air vessel if necessary.
 Ensure that the suction line cannot leak.
24 EN 04/2016