Pressure independent control valve
AssigneeSiemens Schweiz AG
InventorSTEFAN HAGMANN
Life of this patent
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Abstract
A pressure independent control valve contains a valve body with an inlet, an outlet and a flow channel coupling the inlet to the outlet. A hollow piston is arranged in a seat in the valve body, such that the hollow piston is configured to move. The hollow piston has an enclosure, such that the pressure independent control valve maintains different fluid pressures in the flow channel and inside the hollow piston. The pressure independent control valve contains a chamber and a biasing member to urge the hollow piston towards the chamber. The chamber is in fluid communication with the inlet and with the inside of the hollow piston, such that the valve applies substantially the same pressure inside the annular channel, at the inlet and inside the hollow piston.
Claims17
A pressure regulated valve, comprising:
- a valve body having at least one inlet, at least one outlet, at least one flow channel coupling said at least one inlet to said at least one outlet, and at least one chamber in fluid communication with said at least one inlet, the pressure regulated valve configured to apply substantially a same pressure at said at least one inlet and inside said at least one chamber;
- at least one displaceable element separating said at least one chamber from said at least one flow channel, said at least one displaceable element having a flexible diaphragm connecting to said valve body, said at least one displaceable element being displaceable to increase a volume of said at least one chamber and to narrow said at least one flow channel such that said at least one displaceable element lowers a throughput of fluid through said at least one flow channel;
- and
- at least one biasing member configured to urge said at least one displaceable element such that said at least one biasing member urges a volume of said at least one chamber to decrease and a volume of said flow channel to increase, for increasing the throughput of the fluid through said flow channel.
Dependencies are inferred from the claim text.