23
Exceeding pipe strengths may result, for example, in leaks on the pump itself or
on flange joints leading to a considerable loss of pumping medium.
The suction pipe is to be fitted continually rising to the pump and continually fal-
ling in the case of a gravity feed to avoid the formation of air pockets.
Depending on the type of system and pump, the fitting of nonreturn valves and
shut-off valves is recommended.
The thermal expansion of pipes has to be controlled by appropriate measures.
We recommend fitting bellow expansion joints directly between the pump and
the pipes.
It is essential to avoid any sudden (abrupt) closure of pipe valves. The resulting
water hammers may exceed the maximum permissible casing pressure of the
pump several times over! To prevent excessive water hammers, water hammer
dampers or antifluctuators should be fitted.
NB: The ABS adhesives on the suction (153) and discharge connections (155)
take a long time to dry. A minimum 12 hours must be admitted between the
gluing and the first start-up of the pump.
5.3 Suggested installation
Version with glue sockets
2902099800
screw set
Speck article no.
Opening aid for
technical data,
page 2.
Recommended outlet pipe see
Out
Pipe dia.=110 min. Lenght 160mm
flat packing
glue socket
Loose flange d=110
Pipe dia.=110 min. Lenght 160mm
Flachdichtung
glue socket
Loose flange d=110
Pipe dia.=110 min. Lenght 160mm
Recommended inlet pipe
see technical data,
page 2.
In
Alternative:
Screw-Set
internal diameter = 110mm
Speck article no. 2902072153
The connection parts shown are not
supplied with the product.
5.4
Mechanical / Hydraulic
The pump must be installed in a horizontal position in dry condition. It may be
installed either max. 5 m below (gravity feed) or above of the liquid level (sucti-
on mode). Thereby the geodetic head between liquid level and pump inlet must
not exceed 3 m. The suction lift may be significantly reduced by flow resis-
tances in the suction line, if the pipes are very long and/or insufficiently dimen-
sioned.
CAUTION
