14
Incoming media
General safety requirements for supply lines
The document Technical Data states permitted pressure levels for all
incoming media.
If the stated pressure of the medium does not exceed the design
pressure of the pressure vessel , the equipment does not normally have
protection against excessive pressure for that medium.
Where the supply medium pressure (as stated in Technical Data)
exceeds the design pressure of the pressure vessel, the equipment is
protected against excessive pressure for a well-defined inflow rate of
that medium. The protection takes the form of a specific safety valve
and suitable designed restrictions and valves in the internal pipework.
To ensure that the equipment is only supplied at the permitted
pressure levels, the user must accept liability for fitting the supply lines
with reducing valves and safety valves in accordance with the
regulations.
o
C (60°F). This temperature may be exceeded by 5°C (10°F) if reduced
depth of evacuation and pump capacity can be accepted. This applies
primarily to sterilizers of the EN model, i.e. designed for the European
market.
Certain models intended primarily for tropical climates can easily be
modified for use with water temperatures up to 35
o
C (95°F). This topic
is covered under "Connection and pressures" in this section and in the
section headed "Customer-programmable functions" in the SERVICE
MANUAL.
HARDNESS
To minimise sterilizer service and maintenance costs, the water
hardness should not exceed 4dH / (0.7mmol/l) / (70 ppm). A water
softener is recommended where the water is harder than this.
Whether or not the sterilizer is equipped with a safety
valve, the user must install correctly dimensioned safety
valves in the supply lines for incoming media.
Note that the pressure vessel safety systems cease to
operate if the pressure of any medium exceeds the range
stated in Connection data. This results in a RISK OF
BURSTING.
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