Filling fitting for filling a closed hot-water heating system

Details Filling fitting for filling a closed hot-water heating system Filling fitting for filling a closed hot-water heating system

1998-09-08

1999-10-05

Michalsky, Gerald A.

Fluid handling

Back flow prevention by vacuum breaking

Air vent in liquid flow line

1376142, 137881, E03C 110

Patent

active

059608188

ABSTRACT:
The invention relates to a filling fitting for filling a closed hot-water heating system, the filling fitting comprising a tube separator including an upstream backflow preventer, a downstream backflow preventer and a drain valve controlled by the inlet pressure and arranged, with regard to the flow, between said two backflow preventers, and a pressure reducer. This construction allows the downstream pressure reducer to be used in two manners, on one hand in connection with the tube separator and, on the other hand, in order to allow the pressure reducer to be removed. By dividing the filling fitting into two fitting portions, of which the second one only comprises the pressure reducer and the downstream backflow preventer, the second fitting portion can also be used alone without tube separator, when the safety requirements are less strict.

REFERENCES:
patent: 5215121 (1993-06-01), Michl

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