Radijator Inženjering d.o.o, 36000 Kraljevo, Živojina Lazića
- Solunca br.6, Srbija
tel. +381 36 399 140, fax. +381 36 399 150, http://www.radijator.rs
e-mail: [email protected]
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Pressure safety valve must be of nominal diameter of 1/2 inch calibrated to a
maximum of 3 bars.
This security element which belongs to the group of pressure limiters must be of such
construction to withstand short-term overdrafts and temperatures and pressure as well
as the content in the liquid glycol for heating.
Usually in the same place the vent (Figure 2) and the pressure gauge are connected so
that these three elements together constitute a security group and can be mounted over
T'' connector.
This safety element must be subjected to periodic re-calibration , of which the
investor, i.e. the user of the boiler must have valid documentation.
Safety valve must be mounted on the highest point directly to the boiler and the boiler
without any pipeline or any other elements in between. For this purpose there is a
specially designed connector (see picture). Any reduction in diameter of the connector
is prohibitted.
The vent ie. the exhaust of safety valve must be of pipes with a diameter at least equal
to the nominal diameter of the exhaust part of valve. Also, it is allowed to use
maximum one bend of the radius r › 3d.
The safety valve must have a nameplate and the following information on it
- Name of manufacturer
- Designation of type of safety valve / year of testing
- Nominal flow rate
- Data for which thermal effect the safety valve is set
- The highest opening pressure 3 bars
It is obligatory to check the correct functioning at regular intervals as well as the re-
calibration by certified companies. These responsibilities are carried out in
accordance with the law of every country in which the boiler is assembled. Always keep
the written documentation of the last calibration data for the safety valve.
On the return line assemble at least another pressure safety valve.
- The valve of thermal safety by swelling (Figure 3)
Figure 3