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1. (WO2018104327) BYPASS VALVE AND PIG HAVING A BYPASS VALVE

Pub. No.:    WO/2018/104327    International Application No.:    PCT/EP2017/081565
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Wed Dec 06 00:59:59 CET 2017
IPC: F16K 17/30
F16K 17/04
Applicants: ROSEN SWISS AG
Inventors: VOß, Wilhelm
KRALLMANN, Heiner
HEILE, Nico
BREMKE, Rene
SCHNEKE, Daniel
Title: BYPASS VALVE AND PIG HAVING A BYPASS VALVE
Abstract:
The invention relates to a bypass valve for an inspection and/or cleaning pig, which are movable through a pipeline through which a medium flows, wherein the bypass valve (8) comprises an interior chamber having a flow profile, in which a piston (11) is arranged, which is movable, independently of pressure, in a longitudinal direction of the bypass valve via an energy storage means (12), and which is movable between a first, open position of the bypass valve, which allows a bypass for the medium, and a second position, which at least substantially closes the bypass, wherein the piston (11) can be transitioned further, starting from the first position via the second position, in the same direction, into a maximum position, which opens the bypass again, and a pig for inspecting and/or cleaning of pipelines.