14
EB 2185 EN
Design and principle of operation
3.1 Technical data
3.2 Process medium and scope
of application
Safety temperature monitoring of the energy
supply for heat generators or heat exchang-
ers by closing the valve
−
Limit signals from
10
to
120 °C
−
Valve size
DN 15
to
50
−
PN 16
to
25
−
Max.
200 °C
The Type 2439 Safety Temperature Limiter
(STL) with a valve operates without auxiliary
energy and is designed for extended safety
according to DIN EN 14597. The valve is
closed by a spring mechanism when the
temperature reaches the adjusted limit, when
the capillary tube breaks or when leakage
occurs in the sensor system. The limiter can
only be unlocked and put back into
operation with a screwdriver after the fault
has been remedied and the temperature has
fallen below the limit.
Install the sensor together with the supplied
thermowell.
When the safety temperature limiter is com-
bined with a Type 2430 Control Thermostat,
make sure that there is a minimum difference
of approximately 15 K between the limit
temperature of the temperature limiter and
the set point temperature of the control ther-
mostat.
Dimensions and weights
Fig. 3 provides a summary of the dimensions
for the Type 2439 Safety Temperature Limiter
and the Types 2431, 2432, 2433, 2435,
2436 and 2437 Valves. The lengths and
heights in the dimensional drawings are
shown on page 19 onwards.
Typetesting
The safety temperature limiter combined with
the valve has been tested by the German
Technical Inspectorate (TÜV) according to
DIN EN 14597 under the type designation
2750-1.
The registration number is available on re-
quest.
Further details and technical data of the
valves and control thermostats are listed in
the following mounting and operating in-
structions:
See Referenced documentation on
Note
Содержание 2439
Страница 39: ...EB 2185 EN 39...
