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4.3
Intended application
Safety valves protect vessels and pipework systems against impermissible excess pressure. Safety
valves represent the last line of safety for a vessel or pipework system. They should be capable of
preventing impermissible excess pressure when all other upstream regulating, control and monitoring
devices have failed. In order to ensure this operability, safety valves require special attention during their
mounting and maintenance.
A safety valve is a piece of equipment with a safety function for protecting pressure equipment when the
permissible limits are exceeded and is thus subject to Directive 2014/68/EU (Pressure equipment
directive) of the European Parliament and of the Council, article 2, section 4.
4.4
Operational data
Type
0681x
06820
0685x
*When the valve disc is implemented with a sealing plate, the sealing plate material (soft
material seal) must be considered in relation to the pressure and temperature (see details on
the technical data sheet). Further details are to be taken from the VdTÜV bulletin.
**When the safety valve 06820 is made of material 1.4462, the temperature range is from -40
to +250 °C.
4.5
Media
Gases, cryogenic liquefied gases and their gas mixtures, such as:
Name
Argon,
Nitrous oxide,
Ethane,
Ethylene,
Helium,
Carbon dioxide,
Krypton,
LNG
LPG,
Air,
Methane,
Neon,
Oxygen,
Nitrogen,
Trifluoromethane,
Hydrogen,
Xenon,
Operating instructions
Pressure
d
0
range*
[mm]
[bar]
6
30 to 550
10
0,5 to 180
6
30 to 550
10
0,5 to 250
14
0,2 to 200
18
0,5 to 110
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Temperature
pressure
[°C]**
[%]
10
15
10
-270 to +400
15
Medium
See section
"4.5 Media"
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