Piping - Speck pumpen Normblock Installation & Operating Manual

G = ISO 228/1
2)
5 Installation at Site
1. Position the pump set on the foundation and fasten it (see the "Fastening"
table).
2. Place a spirit level on the discharge nozzle to align the pump set.
3. If the volute casing is turned, drill a drain hole in the volute casing (see the
"Drain hole" table below).
Table 8: Drain hole
Sizes
025-160 to 080-315
100-160 to 150-400

5.4 Piping

5.4.1 Connecting the piping
DANGER
Excessive loads acting on the pump nozzles
Danger to life from leakage of hot, toxic, corrosive or flammable fluids!
▷ Do not use the pump as an anchorage point for the piping.
▷ Anchor the pipelines in close proximity to the pump and connect them without
transmitting any stresses or strains.
▷ Take appropriate measures to compensate thermal expansion of the piping.
CAUTION
Incorrect earthing during welding work at the piping
Destruction of rolling element bearings (pitting effect)!
▷ Never earth the electric welding equipment on the pump or baseplate.
▷ Prevent current flowing through the rolling element bearings.
NOTE
Installing check and shut-off elements in the system is recommended, depending on
the type of plant and pump. However, such elements must not obstruct proper
drainage or hinder disassembly of the pump.
✓
Suction lift lines have been laid with a rising slope, suction head lines with a
downward slope towards the pump.
✓
A flow stabilisation section having a length equivalent to at least twice the
inside diameter of the suction flange has been provided upstream of the
suction flange.
✓
The nominal diameters of the pipelines are equal to or greater than the
nominal diameters of the pump nozzles.
✓
Adapters to larger nominal diameters are designed with a diffuser angle of
approx. 8° to avoid excessive pressure losses.
✓
The pipelines have been anchored in close proximity to the pump and
connected without transmitting any stresses or strains.
1. Thoroughly clean, flush and blow through all vessels, pipelines and connections
(especially of new installations).
2. Before installing the pump in the piping, remove the flange covers on the
suction and discharge nozzles of the pump.
Normblock
Drain hole diameter
G 3/8 2)
2)
G 1/2
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