This valve serves to guard against over-temperature and over pressure hazards. Whenver water stored in unvented (pressure type) cylinder exceeds 99˚C as rated.
For control of pressure surge in the domestic and commercial plumbing system where audible shock waves are caused by any of the following:-
To reduce the inlet water pressure to a specified value at it’s outlet
To prevent vacuum conditions occur in water heaters. Also used for the elimination of back-syphonage e.g from swimming pools when fitted on line to which filing hose is connected.
Copper sheathed immersion type with electrical rating:-
To sense and to monitor the temperature of water in the inner tank between 40C – 70C approximately. Besides, it is equipped with a Bimetalic Thermal cut-off which will be activated to cut off electricity supply should there be any malfunction of the thermostat
It has dual functions, one is to guard against excessive pressure built-up in the inner tank above 8 bar, the other is to prevent water in the inner tank to back flow
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