| 摘要 |
Hydraulic safety unit for an accumulation-type water heater, characterised in that the three mechanical sub-assemblies, non-return valve 23, safety valve 10 and stop cock 13 are arranged along the same axis 9, the safety valve 10 and the stop cock 13 being mounted respectively in threaded orifices 7, 8 made at the two ends of a body 1 of elongate shape along this axis 9, and the non-return valve 23 with its peripheral end 25 being mounted inside the body 1 in a shouldered bore 17, the seat 29 of the stop cock 13 consisting of a component 28 also equipped with a peripheral seal 30 and connected into this shouldered bore 17, a vent orifice 6 emerging into an intermediate chamber made between the two aforementioned peripheral seals 25, 30. <IMAGE>
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