Description; General Aspects; Design And Functionality; Installation - SFA SANIFOS-Serie Betriebsanleitung

4. DESCRIPTION

4.1 General aspects

The pumping station is completely assembled so that the pump has to be installed and the
connections (inlet, pressure line, venting line, level control and power supply) be established only.

4.2 Design and functionality

On the shaft floor, a coupling system is mounted, to which the boltless pump is engaged. A guide
pipe, which is attached to a crossbeam in the shaft neck, to guide the pump when being hung
up is available. Engaged by means of a mounted chain, the pump can be lifted out of the tank
without loosening screw connections in the shaft. Depending on the size of the pump, a lifting
gear might be necessary to lift it out. After a long operating time, the pump could attach itself to
the coupling base. To loosen the pump, the chain has to be gently pulled and the chain be shaken
until the pump gets loose from the coupling base. Subsequently, the pump can be carefully pulled
out. Too high tensile forces on the chain have to be avoided in order to prevent damage of the
plastic tank. This way, maintenance and repair work on the pump is possible outside the tank. In
order to prevent backflow of the water column being in the pressure line at the ball check valve
during maintenance and repairing work, a shut-off valve is mounted before the check valve in the
pressure line.

5. INSTALLATION

5.1 Producing the excavation pit

The excavation pit must be created with due regard to the regulations of the civil engineering
(slope angle, possibly shoring up the tank etc.).

5.2 Inserting the shaft

Before inserting the tank, the excavation pit has to be backfilled with approx. 30 cm of crushed
rock and condensed with 5 cm grit so that a horizontal supporting surface comes into being. Then,
the PE tank has to be inserted into the excavation pit and aligned. Now fill up approx. 30 cm
filling sand and condense.
WARNING
Check if the tank still stands level.

5.3 Connecting the shaft

Inlet
An inlet sleeve DN 150 with lip seal is available in the tank. The inlet line (KG pipe DN 150) is plugged
approx. 1 cm into the inlet sleeve. Beforehand, a lubricant or grease has to be applied on the inside
of the seal. The max. deviation of the axis of the inlet must not exceed 3°. Further inlets are possible as
an option.
Pressure line
The pressure pipe line ends approx. 180 mm outside the tank with a pipe socket PE HD 63x5.8.
PE HD pipe 63x5.8 should be installed as pressure line. Connection to the pipe socket which is
available at the tank can take place by means of a commercial compression fitting, for example.
Ventilation / cable routing
2 sleeves with lip seal DN 100 are available for ventilation / cable entry. The ventilation pipe
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