| 主权项 |
1. A fluid circulation valve, comprising:
a body delimiting an internal duct; a flap mounted pivotally on a spindle, separating the flap into a first part and a second part, the flap being able to pivot between an open position allowing the fluid to pass into the duct, and a closed position which prevents the passage; a seal, against which the first part and the second part of the flap come to rest in the closed position, wherein the seal is separated by the spindle into a first part of the seal facing the first part of the flap, and a second part of the seal facing the second part of the flap,
the seal comprising two openings, a first opening on the first part of the seal and allowing the fluid to pass into the duct when the flap is in the open position, and a second opening facing on the second part of the seal and allowing a pressure drop downstream of the second part of the flap when the flap is in the closed position,the seal further seals the body of the valve in the closed position,the seal has pressure-lowering means downstream of the second part of the flap so as to increase the force for clamping the second part of the flap against the seal, andthe pressure-lowering means comprising an opening created in the second part of the seal. |
