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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: radijator@radijator.rs
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.
Drain or exhaust of the safety valves must be of pipes with a diameter at least equal to the
nominal diameter of the outlet part of the valve. You are allowed to use up its production
of an arc of radius r>3d.
The safety valve must have a nameplate and the following information on it
o
Name of manufacture;
o
Designation of type of safety valve / year of testing;
o
Nominal flow rate;
o
Data for which thermal effect the safety valve is set;
o
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 4)
Figure 4.
This safety element also has a role of a limitator of temperature. Below it will be marked
with the abbreviation VTO.
In some extremely dangerous situations in the transformation of water into vapor is such
that the pressure safety valves are not sufficient to ensure the safety of the hydraulic
system. For this reason, the installation of VTO is mandatory. Depending on the
regulations of the countries in which the boiler is assembled, it is necessary to install
theVTO only for the determined higher powers or for each power of a boiler it is the
obligatory to instal the VTO.
Place the installation is shown in the Assembly diagram of boiler onto the installation in
Figure 5. The boiler is supplied with a copper coil so it is necessary to use the VTO with
trhe exchanger, as shown in Figure 5. Cold sanitary water is brought to the VTO. When
the VTO-probe has the information that the temperature is over 95 degrees the VTO is
opened and water flows through copper coil. After some time the temperature of water in
boiler returns to its normal state.
