Chromatography Column Valve for Clean-in-Place Packing
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Solution Overview
Problem
Preparative chromatography columns require frequent cleaning and maintenance, especially for large-diameter columns, which is costly and labor-intensive, as existing solutions do not allow for effective 'clean-in-place' operations without opening the column, leading to inefficiencies and increased operational costs.
Innovation Solution
A preparative chromatography column design featuring a series of valves mounted on the lateral wall, each with a movable sleeve that allows for filling, emptying, and cleaning of the stationary phase and supply/discharge lines without obstructing the column's interior flow, enabling 'clean-in-place' operations through a common valve or series of valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the column is opened for cleaning and maintenance, then the cleaning effectiveness is improved, but the labor cost and operational complexity increase
Solution Approach 1:
The system enables self-service cleaning through the clean-in-place capability. The valve allows cleaning fluids to be circulated through the column and supply/discharge lines without external intervention or column disassembly, making the system clean itself automatically.
Solution Approach 2:
The valve mounted on the lateral wall serves multiple functions: it controls supply of stationary phase slurry, enables discharge of stationary phase, and provides access for cleaning operations. This multi-functionality eliminates the need for separate access points for each operation.
2Adaptability or versatility
If the column is opened for packing and unpacking, then the media replacement is achieved, but the operational time and labor requirements increase
Solution Approach 1:
The valve extracts the function of media replacement from the column structure itself. By providing a dedicated access point on the lateral wall, the system allows stationary phase to be supplied and discharged without extracting or opening the column structure.
Solution Approach 2:
The valve creates a segmented access point separated from the main column body. This segmentation allows independent operation for packing and unpacking without affecting the integrity or operation of the column itself, enabling faster media replacement.
3Ease of operation
If a valve with internal components extending into the column interior is used, then the valve function is achieved, but the column interior flow is obstructed
Solution Approach 1:
The valve design concentrates all functional components within the valve body itself, creating a localized solution that does not intrude into the column interior. The lateral wall mounting position and internal bore configuration ensure that valve operations occur in a dedicated space separate from the column flow path.
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A preparative chromatography column is equipped with one or more valves that can each be used to both inject a column packing into the column or withdraw used packing from the column, in addition to cleaning the supply and discharge lines associated with the valve itself, all by moving a movable plug within the valve body and all without protruding into the column interior. Each valve is mounted on the lateral wall of the column just above the filter plate at the column floor, and the plug is movable between a closed position in which the end surface of the plug is flush with the inner wall of the column and an open position in which the plug is recessed within the bore. Each valve has two additional ports in its valve body, positioned such that when the plug is closed, both ports are open to the valve bore, and when the plug is open, at least one of the ports is open to the bore. The position of the plug within the valve bore determines the valve function.