Fluid flow control valve
First Claim
1. A fluid-flow control valve comprising:
- an inlet (E) for connecting to a feed duct;
an outlet (S) for connecting to an evacuation duct;
a valve member (1) that, at rest, bears against a valve seat (2) in such a manner as to isolate the inlet (E) from the outlet (S); and
an actuator means (5, C) for moving the valve member (1), the actuator means comprising;
a chamber (C) that communicates with the inlet (E) via a hole (11) of determined section, the chamber (C) being disposed relative to the valve member (1) on its side facing away from the valve seat (2), in such a manner as to urge the valve member against its seat;
a bypass (5) that connects the chamber (C) to the outlet (S), the bypass being controllable between an open state for passing fluid, and a closed state, the bypass presents a through section that is greater than the through section of the hole (11), so as to cause the pressure in the chamber to drop on opening the bypass; and
a fluid-leak detector means (4, 5, 6) that are suitable for detecting a leak downstream from the valve member.
1 Assignment
0 Petitions
Accused Products
Abstract
A fluid-flow control valve includes an inlet (E) for connecting to a feed duct; an outlet (S) for connecting to an evacuation duct; a valve member (1) that, at rest, bears against a valve seat (2) to isolate the inlet (E) from the outlet (S); and an actuator mechanism (5, C) for moving the valve member (1). The actuator mechanism includes a chamber (C), which communicates with the inlet (E) via a hole (11) and is disposed relative to the valve member (1) on its side facing away from the seat (2), in such a manner as to urge the valve member against its seat; and a bypass (5) that connects the chamber (C) to the outlet (S), the bypass being controllable between an open state for passing fluid, and a closed state.
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Citations
11 Claims
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1. A fluid-flow control valve comprising:
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an inlet (E) for connecting to a feed duct; an outlet (S) for connecting to an evacuation duct; a valve member (1) that, at rest, bears against a valve seat (2) in such a manner as to isolate the inlet (E) from the outlet (S); and an actuator means (5, C) for moving the valve member (1), the actuator means comprising; a chamber (C) that communicates with the inlet (E) via a hole (11) of determined section, the chamber (C) being disposed relative to the valve member (1) on its side facing away from the valve seat (2), in such a manner as to urge the valve member against its seat; a bypass (5) that connects the chamber (C) to the outlet (S), the bypass being controllable between an open state for passing fluid, and a closed state, the bypass presents a through section that is greater than the through section of the hole (11), so as to cause the pressure in the chamber to drop on opening the bypass; and a fluid-leak detector means (4, 5, 6) that are suitable for detecting a leak downstream from the valve member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification