Sealed Fitting Connection for Biopharma Gas Leak Detection
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Solution Overview
Problem
Current methods for integrity testing of biopharmaceutical systems, particularly at hose connections, face challenges due to gas-permeable membranes and operator variability, making it difficult to detect small leaks reliably and efficiently.
Innovation Solution
A sealing arrangement comprising a housing unit with a tubular connecting device and a sealing structure that forms a gas-tight junction around the intermediate portion, allowing a tracer gas to be contained within a hermetically sealed detection chamber for effective leak testing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gas permeable membrane is used as sterile barrier at the end of tubing lines, then sterility is maintained, but the connection integrity cannot be tested for leakage
Solution Approach 1:
The system is divided into two separate chambers: a first chamber containing the gas permeable membrane and sterile connection, and a second chamber used for leak detection. This segmentation allows the membrane to maintain sterility while the second chamber enables integrity testing without compromising the sterile barrier function.
Solution Approach 2:
A clamping member is introduced as an intermediary element to secure the tubing to the hose barb within the housing unit. This clamping mechanism creates a testable sealed environment without interfering with the gas permeable membrane's sterile barrier function, enabling integrity testing while maintaining sterility.
2Ease of operation
If manual helium sniffing is performed for leak detection, then operator flexibility is maintained, but measurement precision and sensitivity decrease due to operator variability
Solution Approach 1:
The housing unit with its sealed chamber and clamping mechanism creates a self-contained test environment that automatically concentrates tracer gas in case of leaks. This self-service design reduces dependence on operator skill by providing a controlled environment that enhances detection sensitivity regardless of operator variability.
Solution Approach 2:
The system changes the physical parameters of the test environment by creating a confined chamber that increases tracer gas concentration and extends residence time. This parameter change (concentration and time) improves measurement precision and sensitivity, making leak detection more reliable while maintaining operational simplicity.
3Difficulty of detecting and measuring
If tubing is clamped before the sterile connecting device for integrity testing, then leak detection becomes possible, but the connection around the hose-barb cannot be tested and remains a leakage risk
Solution Approach 1:
The housing unit is segmented into chambers that allow different testing strategies for different connection points. The first chamber accommodates the clamped tubing with sterile connector, while the second chamber enables testing of the hose-barb connection, ensuring comprehensive integrity verification of all critical joints.
Solution Approach 2:
The system adds a spatial dimension to leak detection by creating a separate second chamber that can independently test the hose-barb connection. This dimensional separation allows simultaneous or sequential testing of multiple connection points without interfering with each other, comprehensively addressing integrity concerns.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables reliable and efficient detection of small leaks in biopharmaceutical systems by maintaining the tracer gas within the housing unit, improving the sensitivity and reliability of integrity testing for connecting devices with gas-permeable ends.
Implementation Method 1
a sealing structure adapted to form a gas-tight junction at the access passageway, by a continuous contact around the intermediate portion
Implementation Method 2
many sterile connectors use a gas permeable membrane as sterile barrier, covering an open end of the connector
Data Source
AI summary
The sealing arrangement includes a connecting device and one or more housing parts of a housing unit for enclosing of a component, typically an attachment component forming a head of the connecting device. The gas permeable end formed in such component can be isolated, so that the sealing arrangement is adapted for use in detecting a detectable gas in a hermetically sealed detection chamber. Thanks to a sealing structure configured at a passageway for the fastening of the connecting device, a housing unit is obtained with a tight radial contact around an intermediate portion of the connecting device. The device is fitted with a flexible hose end, preferably at a barbed nozzle forming the end at the opposite from the gas permeable end. With such arrangement, the hose mounting can be tested for its integrity.