Installation
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Oleolift-C
3.3.8 Laying and connecting the on-site pressure pipe
IMPORTANT
Before the on-site pressure pipe is connected, the excavations must be backfilled
up to this level,
Chapter 3.3.12 “Backfill excavations”.
Based on normative requirements:
■
The pressure pipe must be designed for at least 1.5 times the pump pressure.
■
Lay the pressure pipe so that it rises continuously and is frost-resistant.
■
The flow velocity in the pressure pipe must not fall below 0.7 m/s and must not
exceed 2.3 m/s.
■
Never connect other pipes to the pressure pipe.
■
Air admittance valves are not allowed in the pressure pipe.
■
Connect the pressure pipe stress-free.
Pressure line DN 50, DN 70 or DN 80 (all NS with DL 50)
Compression fitting ID 63 mm to ID 75 and 90 can be purchased from ACO as an
optional item.
Î
Cut the on-site pressure pipe at aright-
angles and grind the spigot end.
Î
Use acid-free lubricant to grease the
spigot end of the on-site pressure
pipe and the connection pipe to the
pump station.
Î
Determine the insertion depth
and
mark it on the pipe.
Î
Loosen the conical nuts on the
compression fitting by a 3 – 4 turn (do
not loosen off completely).
Î
Insert the pipe to the end stop and/or
marking in the compression fitting.
Î
Hand tighten the conical nuts.
Î
Tighten for an optimal strength with tools
suitable for plastic compression fittings.