G - Physics – 05 – D
Patent
G - Physics
05
D
G05D 16/20 (2006.01) G05D 16/18 (2006.01)
Patent
CA 2385366
In one aspect, the present invention provides control apparatus for controlling the pressure of a water distribution system. Typically the apparatus will be connected to a main pressure reducing valve in the system, which main valve is under the control of a dual diaphragm pilot valve. The control apparatus includes variable gas pressure output means which, in one embodiment, are connected to the pilot valve. There is also provided a relatively high gas pressure source and a relatively low gas pressure source, each of which are selectively contestable to the variable gas pressure output means in order to vary the pressure of the variable gas pressure source.
Dans un aspect, la présente invention concerne un appareil de régulation de la pression d'un système de distribution d'eau. Généralement, l'appareil est relié à un clapet de détente de pression abaissant la pression dans ledit système, ce clapet étant sous contrôle d'un clapet-pilote dual à diaphragme. L'appareil de régulation comprend des dispositifs de sortie de pression de gaz variable, qui dans un mode de réalisation, sont reliés au clapet-pilote. Cette invention concerne également une source de pression de gaz relativement élevée et une source de pression de gaz relativement basse, chacune d'elles répondant de manière sélective aux dispositifs de sortie de pression de gaz variable, en vue de faire varier la pression de la source de pression de gaz variable.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Technolog Limited
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