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US 8,074,528 B2Granted
In-line valve sampling system
AssigneeNeotecha AG
InventorPeter Zollinger
Life of this patent
Estimating the term…
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.
Claims19
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, 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 operator connected to said valve spindle for moving said spindle 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 in contact with said valve spindle, said cartridge receiving a first O-ring received in said first cut-out portion for exerting a sealing force between said valve unit body and said spindle to prevent process flow from entering said valve unit body, said cartridge further comprising a lip portion located below said first cut-out portion, the lip portion further comprising an extension arm for wiping particles when said spindle moves with said valve unit body, said packing cartridge further comprising a second O-ring and a second cut-out portion for receiving said second O-ring to exert 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.
3 more elements
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 prevents 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;
- and
- 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 a first 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, said packing cartridge further comprising a lip portion located adjacent said first cut-out portion, the lip portion including an extension arm engaged with said spindle for wiping particles when said spindle is lifted within said valve unit body;
- wherein said packing cartridge further comprises a second O-ring and a second cut-out portion for receiving said second O-ring to exert a sealing force between said valve unit body and said spindle to prevent process flow from entering said valve unit body.
3 more elements
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 to house said valve unit, said valve unit having a valve port, said valve unit having an open position in which said sample of process media is receivable through said valve port, said valve unit having a closed position in which process media is prevented from being extracted from said pipeline through said valve port;
- a valve spindle disposed within said valve unit body, said valve spindle including a head portion, said spindle being spring biased in said closed position to seal said head portion against said valve port;
- an operating lever connected to said valve spindle, said operating lever movable from said open position to said closed position;
- a primary spindle seal, a secondary spindle seal and a Belleville washer disposed between the primary and secondary spindle seals;
- wherein the primary spindle seal comprises a packing cartridge positioned around said valve spindle, said packing cartridge comprising first and second O-rings received in first and second cut-out portions, said first and second 0-rings for exerting a sealing force between said valve unit body and said spindle to prevent process flow from entering said valve unit body, said packing;
- and
- wherein said secondary spindle seal comprises third and fourth O-rings disposed in third and fourth cut-outs, said third and fourth O-rings exerting a sealing force between said valve unit body and said spindle, said packing cartridge further comprising a lip portion having an extension arm engaged with said spindle for wiping away particles as said spindle is lifted within said valve unit body.
4 more elements
Dependencies are inferred from the claim text.