In-Line Valve Sampling System
AssigneeNeotecha AG
InventorPeter Zollinger
Life of this patent
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Abstract
An in-line valve sampling system connected to a pipe conduit extracts a sample of process media in a receiving container or receptacle for testing. The valve sampling system provides a resilient sealing mechanism for corrosive process media at elevated and fluctuating temperature ranges by providing a packing cartridge having a thin film of PTFE material biased by at least one O-ring to provide a seal between a valve spindle and a raised portion of the packing cartridge.
Claims13
A sampling device having a valve unit installed in a process pipeline for receiving a sample of process media flowing through said pipeline, said sampling device comprising:
- a valve unit body configured to house said valve unit, said valve unit having a valve port which in an open position supplies said sample of process media and in a closed position preventing said sample of process media from being extracted from said pipeline;
- a valve spindle disposed within said valve unit body and lined with PTFE, said valve spindle including a head portion, said spindle being spring biased in said closed position such that said head portion creates a seal with said valve port;
- an operating lever connected to said valve spindle having a range of motion from said open position to said closed position;
- a packing cartridge positioned around said valve spindle, said cartridge having a first cut-out portion and an inner wall, said inner wall lined with PTFE and in contact with said valve spindle, said cartridge receiving an O-ring for exerting a sealing force between said valve unit body and said spindle to prevent process flow from entering said valve unit body;
- and
- a receptacle connected to said valve unit body configured to receive said sample media.
Dependencies are inferred from the claim text.