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22 Installation CR/EN (1004) 4.0
5 When the grout has thoroughly hardened, check the base plate bolt nuts and tighten
if necessary.
3.5 Piping
• The piping to the suction and delivery connections must fit exactly and must not be
subject to stress during operation. For the maximum allowable forces and moments on
the pump flanges see paragraph 10.2 "Permissible forces and moments on the
flanges".
• The passage of the suction pipe must be amply dimensioned. This pipe should be as
short as possible and run towards the pump in such a way that no air pockets can
arise. If this is not possible, a venting facility should be provided at the highest point of
the pipe. If the inside diameter of the suction pipe is larger than the suction connection
of the pump, an eccentric reducer should be applied to prevent air pockets and whirls.
See figure 5.
• The maximum allowable system pressure is stated in paragraph 2.13 "Application
area". If there is a risk that this pressure might be exceeded, for instance because of
an excessive inlet pressure, appropriate measures should be taken by mounting a
safety valve in the piping.
1Drain pan.
2 Wooden frame.
3Shims.
4 Basic foundation.
5Grout.
Figure 4: Grouting base plate.
Figure 5: Eccentric reducer to suction flange.
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2
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4
5
5