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Fig. no. 31 Two-way safety valve DVB 1 – 02
1 – Boiler
2 – Two-way safety valve DBV 1 – 02
3 – Safety valve
4 – Reduction valve
5 – Filter
6 – Ball tap
7 – Pump
8 –Superfluous heat withdrawal
I – Cold water inlet
II – Heating water outlet
III – Return water inlet
Fig. no. 32 Recommended diagram of two-way safety valve connection DVB 1 - 02
Technical data of two-way safety valve DBV 1 – 02 (made by Regulus)
Opening temperature (limit):
100 °C (+0° - 5 °C)
Maximum temperature:
120 °C
Maximum pressure on boiler side: 250 kPa
Maximum pressure on water side: 600 kPa
Nominal flow at
U
p 100 kPa:
1,9 m
3
/h
Application
Two-way safety valve DBV 1 – 02 is designed for central heating boilers protection against overheating.
In the valve body there is the drain and refill valve controlled by thermostatic element. Once the limit
temperature has been achieved the drain and refill valves open simultaneously it means cold water flows
into boiler and at the same time hot water is drained from the boiler. Once the temperature has dropped
below the limit value the drain and refill valve are closed simultaneously.
ATTENTION! It does not substitute for the safety valve.
A –cold water inlet G 3/4“
B – outlet into boiler G 3/4“
C – outlet into drain G 3/4“
D – outlet from boiler G 3/4“
