21.10.2004
ALTO Danmark A/S
c)
It is important to ensure abundant water - no less than 150 l/min. per
pumping unit.
To meet this requirement the diameter of the supply pipe should
be minimum 1 1/4" (32 mm) at a water pressure of 3,5 bar, and at a water
pressure lower than 3,5 bar the water pipe should be minimum 1 1/2" (38 mm).
d)
The plant is equipped with a filter on the supply pipe of the pump.
e)
The pressure loss in the supply pipe should be kept as low as possible which
means that:
- unnecessarily long supply pipes should be avoided
- low resistant ball valves should be used
- fittings with high pressure loss should be avoided
f)
On pipe mounting care should be taken that no air locks are produced.
g)
Max. allowed temperature of inlet water: 70°C
h)
Max. allowed pressure of inlet water for pump station PZC: 4 bar
2.3 Compressed-air
Connection
a)
Prior to connection to the plant the supply pipe should be rinsed through
carefully with air in order to remove coarse impurities and metal shavings.
b)
The plant should be connected to a compressed-air pipe or a compressor
offering:
- an inlet pressure to the low-pressure plant of minimum 5 bar
- a minimum capacity of 450 l/min.
