Valve structure
AssigneeBraukmann Armaturen AG
InventorsEberhard Gocke, Rudolf Vollmer
Life of this patent
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Abstract
A valve structure has a body with an inlet, an outlet and an intermediate by pass aperture. A pair of identical check valves are located in the body, one to each side of the aperture. The check valve nearest the inlet has a slidable housing, movable to cover the aperture, biased away from the fixed housing of the second check valve by a spring. The check valves are closable by individual springs in the direction of the inlet but the individual springs are stronger than the spring separating the housings.
Claims7
A valve structure having a body with an inlet, an outlet and an intermediate by-pass aperture, first and second check valve housings in said body and located respectively before and after said by-pass aperture in relation to the direction of flow, said second valve housing being sealingly secured to said body and said first check valve housing being sealingly but slidably engaged with said body and movable under flow pressure towards said second valve housing to close said by-pass aperture and a first spring bearing said first check valve towards said inlet, said check valve closing through individual springs, said first spring being weaker than said individual springs.
Dependencies are inferred from the claim text.