초록 ▼

A valve which is fitted with two sealing places which are disposed in series and in the closed position of the valve prevent the overflow of fluid from one valve casing part into another, with the leakage cavity disposed between the sealing places and connected to the outside of the valve through th

A valve which is fitted with two sealing places which are disposed in series and in the closed position of the valve prevent the overflow of fluid from one valve casing part into another, with the leakage cavity disposed between the sealing places and connected to the outside of the valve through the valve casing, has a closed position in which the connection of the leakage cavity with an inside space of the valve casing parts is sealed by a closing member cooperating with the two sealing places. The connection between the leakage cavity and the inside space can be controlled also in positions other than the closed position of the valve by a locking piece which substitutes the closing member regarding its interaction with the leakage cavity. This locking piece, which is movable relative to the closing member in the direction of the degree of freedom of motion of the closing member, controls the connection between the leakage cavity and the inside space.

대표청구항 ▼

A process for controlling a leakage cavity of a valve having a valve casing defining a first interior volume and a second interior volume, the valve being provided with a closing member, two sealing places disposed in series on the valve casing and a leakage cavity disposed between the sealing place

A process for controlling a leakage cavity of a valve having a valve casing defining a first interior volume and a second interior volume, the valve being provided with a closing member, two sealing places disposed in series on the valve casing and a leakage cavity disposed between the sealing places and connected to the interior volumes of the valve casing via a connection and to the outside of the valve via a flow passage in the valve casing, the sealing places cooperating with the closing member (1) to prevent the flow of fluid between the first interior volume and the second interior volume and (2) to completely close off the connection of the leakage cavity to the interior volumes of the valve casing in a closed position of the valve, comprising: controlling the connection between the leakage cavity and the interior volumes of the valve casing in positions other than the closed position of the valve, when the first and second interior volumes are in fluid communication with one another, by placing another element in cooperation with the two sealing places to close the connection between the leakage cavity and the interior volumes of the valve casing when the valve is in positions other than the closed position.