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Sample injection diaphragm valve

A diaphragm valve, sample technology, applied in the field of gas chromatography and sample analysis

Pending Publication Date: 2021-09-07
APN有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each process conduit terminates in a process port

Method used

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  • Sample injection diaphragm valve
  • Sample injection diaphragm valve
  • Sample injection diaphragm valve

Examples

Experimental program
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Embodiment Construction

[0052] The present invention relates generally to plungers and plunger assemblies for use in diaphragm-sealed valves, such as valves suitable for gas chromatography.

[0053] In the following description, similar features in different embodiments are given similar reference numerals. For simplicity and clarity, i.e. so as not to unduly burden the drawing with unnecessary reference numerals, not all figures contain references to all components and features; references to some components and features may be found in only one figure , and components and features of the present disclosure shown in other drawings can be easily deduced therefrom. Throughout the specification, unless otherwise stated, positional descriptions such as "top" and "bottom" should be used in the context of the drawings and should not be considered limiting.

[0054] refer to figure 1 , figure 2 , image 3 , Figure 3A , Figure 4 , Figure 4A and Figure 4B , shows an exemplary sample injection di...

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PUM

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Abstract

A sample injection diaphragm valve is provided, as well as a plunger assembly and a method of operating the valve. The valve includes a valve head and a valve body. The valve includes a diaphragm positioned between the valve head and the valve body. The diaphragm has a process groove seated in the recess of the valve body, for circulating fluid therein. Plungers are slidably fitting in plunger passages of the valve body. Each plunger is movable between a closed position wherein the plunger deforms the diaphragm and blocks fluid circulation between two process ports and an open position wherein the plunger is retracted away from the diaphragm, allowing fluid to circulate in the process groove. The plungers have linear lips extending across the top face of the plungers, for pressing against the diaphragm when in the closed position.

Description

technical field [0001] The present invention relates generally to gas chromatography and sample analysis, and more particularly to an improved diaphragm valve. Background technique [0002] Chromatographic systems rely on the use of valves to allow reproducible sample introduction and various column switching schemes. Diaphragm-sealed valves are often used in such systems. A typical diaphragm seal valve includes a valve head with a plurality of ports opening on an interface. Each port is associated with a channel in the valve head to which various analytical fittings and tubing can be connected. The diaphragm valve also includes a valve body having an interface opposite the interface of the valve head. A diaphragm, usually made of a polymeric material, is compressed between the opposing interfaces of the valve body and valve head. On the interface of the valve body there is usually a main recess in which a mating recess in the diaphragm sits, allowing some clearance for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/20F16K11/00F16K7/14
CPCF16K7/14G01N30/20G01N2030/201G01N2030/205F16K7/16
Inventor 西蒙·莱梅林乔尔·莱萨德
Owner APN有限责任公司