Technical Manual
MT 302-I
6
2.5
CONDITIONS OF USE
It is recommended to check, before commissioning, that the conditions
of use conform to the features of the device.
These specifications are recalled on the rating plates with which each
valve is provided (figure 3).
The meaning of the symbols shown on the rating plate is shown below:
Safety valve
the valve model
PS
maximum allowable pressure
S. n.
serial number
T
permitted service temperature
DN
rated diameter of valve and type of flanging (if
included)
Flow area:
Diameter corresponding to minimum cross-
section
Set press.
Calibration value
Fluid
Fluid
Overpress.
Overpressure to which the declared Kd value
refers
Kdr
declassified discharge coefficient
In particular, it draws attention to the following features:
-
Maximum allowable pressure PS
-
Design temperature T (the minimum and maximum value
are shown)
-
The class of the input and output connections
Moreover the user must verify that the materials used and the surface
treatments which may have been applied are compatible with the
intended use.
Given the geometric features of the valve, in the design phase certain
stresses from traffic, wind or earthquakes were not considered.
Therefore, the user must take appropriate precautions to reduce the
effects on all of these events when they are expected.