A gas chromatograph that includes a metering chamber, two separating devices and a multiport valve unit having switching functions for metering, straight separation, cutting and backflush, where the multiport valve unit is formed as a multiport diaphragm valve.

A diaphragm valve for gas analysis applications is provided. The valve includes a valve cap provided with a plurality of process conduits extending therethrough, a valve body engageable with the valve cap and having a body interface provided with a recess, a diaphragm positioned between the valve cap and valve body and having a process groove for circulating fluid therein, the process groove engaging the recess, a plunger assembly provided within the valve body, the plunger assembly comprising a plurality of plungers movable between a closed position wherein the plunger engages the diaphragm, and an open position wherein the plunger is spaced from the diaphragm, and an actuating assembly comprising a gas inlet to allow the injection of actuating gas therein, the actuating assembly comprising a purging system for purging a region located between the diaphragm and the body interface, whereby the actuating gas is used for purging the region.

The present invention relates to a valve unit (100) for a chromatography apparatus, the valve unit comprising a fluid inlet (110) configured to receive an input fluid, a fluid outlet (120) configured to provide an output fluid, a first pair of fluid ports (131,132) configured to be coupled to a first column, a second pair (141,142) of fluid ports configured to be coupled to a second column, a coupling valve assembly (200) configured to direct fluid between a selection of the fluid inlet (110), the fluid outlet (120), the first pair of fluid ports (131,132) and the second pair of fluid ports (141,142) in response to one or more control signals, wherein the coupling valve assembly is configured to direct fluid using a selection of membrane valves coupled by fluid channels comprised in a body of the coupling valve assembly. The invention further relates to a chromatography apparatus comprising the valve unit and a membrane valve comprised in the valve unit.

The disclosure includes a gas chromatograph for underground use comprising a fixing board. In some embodiments, the gas chromatograph for underground use includes a power connection socket, at least one three-way solenoid valve, a quantitative loop, an analysis module, a communication main board, a data transmission device, a sample injection membrane valve, and a gas injection pump detachably coupled to the fixing board. In some embodiments, the quantitative loop and the sample injection membrane valve are arranged and configured to couple to at least one of the at least one three-way solenoid valves.

Disclosed is a device for chromatographic separations comprising: a manifold comprising a manifold body defining an elongate central duct, the central duct comprising a centrally-located closable duct valve providing selective fluid communication

Go between a first portion of the central duct and an opposed second portion of the central duct, a first plurality of connectors, each connector of the first plurality of connectors for connecting to a distinct chromatographic separation column and/or feed or extraction tubing or to a connector of an adjacent manifold; a second plurality of connectors, each connector of the second plurality of connectors for connecting to a distinct chromatographic separation column and/or feed or extraction tubing or to a connector of an adjacent manifold; wherein said manifold body further defines: a first plurality of branch ducts, each branch duct of which extending from the first portion of the central duct to an individual one of the first plurality of connectors, each of the branch ducts of the first plurality of branch ducts comprising a closable branch valve providing selectable fluid communication between a respective connector and the first portion of the central duct, a second plurality of branch ducts, each branch duct of which extending from the second portion of the central duct to an individual one of the second plurality of connectors, each of the branch ducts of the second plurality of branch ducts comprising a closable branch valve providing selectable fluid communication between a respective connector and the second portion of the central duct; first and second ports in fluid communication with the centrally-located closable duct valve wherein said first port communicates with said first portion of the central duct and said second port communicates with said second portion of said central duct, wherein one of said first and second ports is further positioned to communicate with said central duct at a location between the centrally-located closable duct valve and the first and second plurality of branch ducts, respectively.

A flow distribution device for bioprocess systems, comprising: a flow distribution manifold (12; 112) comprising: at least four fluid connection conduits (14), wherein each fluid connection conduit (14) comprises a first end (18) for fluid connection and an opposite second end (20), and wherein at least three of the fluid connection conduits comprise a membrane (19a) and a valve seat (19b), which membrane (19a) can be put in at least two different positions in relation to the valve seat (19b) for allowing or preventing fluid flow between the first end (18) and the second end (20) of the fluid connection conduit (14); and a central common compartment (30) to which the second ends (20) of each of the fluid connection conduits (14) are connected, whereby the first ends (18) of each of the fluid connection conduits (14) can be in fluid communication with the central common compartment (30) and wherein the fluid connection conduits (14) are entering the central common compartment (30) from at least three different directions; wherein said flow distribution device (10) further comprises at least three membrane actuation members (41) which are provided in connection with one membrane (19a) of the flow distribution manifold (12; 112) each, wherein each of said membrane actuation members (41) is configured for actuating the membrane (19a) to be in at least two different positions in relation to the valve seat (19b), wherein a first position of the membrane (19a) allows flow between the first end (18) and the second end (20) of the fluid connection conduit (14) and a second position of the membrane (19a) prevents flow between the first end (18) and the second end (20) of the fluid connection conduit (14).

A valve switching cassette for selectively interconnecting components of a bioprocess installation, wherein the valve switching cassette comprises at least one fluid flow system of ports and fluid lines, which fluid flow system includes primary ports, communicating with primary fluid lines, and secondary ports, communicating with secondary fluid lines, wherein the valve switching cassette comprises an array of switchable valve units for selectively interconnecting the primary fluid lines with the secondary fluid lines via transfer fluid lines. It is prosed, that the valve switching cassette comprises a transfer plate with apertures and an elastically deformable membrane structure on each flat side of the transfer plate, that at least part of the primary fluid lines and secondary fluid lines are extending between the transfer plate and one of the membrane structures and that the transfer fluid lines are at least partly provided by the apertures.

A unitary distribution plate of a Gas chromatograph (GC) module having a plurality of valve bores disposed on a bottom surface of the unitary distribution plate and a least one sensor cell and at least one column port machined into the top surface of the unitary distribution plate. The valve bores and sensor cells are connected by fluid pathways within a thickness of the distribution plate. The pathways include a combination of planar, longitudinal, diagonal, and radial fluid pathways relative to the top surface of the distribution plate. The fluid channels are formed by diffusion bonding or more generally laminating multiple plates into the unitary distribution plate.

The present invention relates to a valve unit for a chromatography apparatus, the valve unit comprising a fluid inlet configured to receive an input fluid, a fluid outlet configured to provide an output fluid, a first pair of fluid ports configured to be coupled to a first column, a second pair of fluid ports configured to be coupled to a second column, a coupling valve assembly configured to direct fluid between a selection of the fluid inlet, the fluid outlet, the first pair of fluid ports and the second pair of fluid ports in response to one or more control signals, wherein the coupling valve assembly is configured to direct fluid using a selection of membrane valves coupled by fluid channels comprised in a body of the coupling valve assembly. The invention further relates to a chromatography apparatus comprising the valve unit and a membrane valve comprised in the valve unit.

A diaphragm valve for gas analysis applications is provided. The valve includes a valve cap provided with a plurality of process conduits extending therethrough, a valve body engageable with the valve cap and having a body interface provided with a recess, a diaphragm positioned between the valve cap and valve body and having a process groove for circulating fluid therein, the process groove engaging the recess, a plunger assembly provided within the valve body, the plunger assembly comprising a plurality of plungers movable between a closed position wherein the plunger engages the diaphragm, and an open position wherein the plunger is spaced from the diaphragm, and an actuating assembly comprising a gas inlet to allow the injection of actuating gas therein, the actuating assembly comprising a purging system for purging a region located between the diaphragm and the body interface, whereby the actuating gas is used for purging the region.